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WO2025164641A1 - Joining structure - Google Patents

Joining structure

Info

Publication number
WO2025164641A1
WO2025164641A1 PCT/JP2025/002704 JP2025002704W WO2025164641A1 WO 2025164641 A1 WO2025164641 A1 WO 2025164641A1 JP 2025002704 W JP2025002704 W JP 2025002704W WO 2025164641 A1 WO2025164641 A1 WO 2025164641A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
plating layer
recess
joining
joining structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/002704
Other languages
French (fr)
Japanese (ja)
Inventor
潤司 藤原
拓也 定塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2025164641A1 publication Critical patent/WO2025164641A1/en
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/007—Spot arc welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded

Definitions

  • the present invention relates to a joining structure.
  • Patent Document 1 discloses a joining structure in which a first member (first metal material) and a second member (dissimilar material) that is difficult to weld to the first member are overlapped, and a third member (third material) is melted and arc-welded through a penetration in the second member.
  • the molten third member forms a flange that covers the outer periphery of the upper surface of the penetration portion of the second member. This secures the first and second members together through the compressive fixing force between the flange and the first member due to the solidification and shrinkage of the third member relative to the first member.
  • Patent Document 1 there is a risk that moisture may enter from the outside through the gap between the overlapping surfaces of the flange portion of the third member and the second member, and the gap between the overlapping surfaces of the first member and the second member. The moisture that enters may then cause electrolytic corrosion in the overlapping portion of the flange portion of the third member and the second member, and in the overlapping portion of the first member and the second member, potentially reducing the joint strength.
  • the first aspect is a joint structure in which a first member made of a metallic material, a second member made of a material that is difficult to weld to the first member and laminated on the first member, and a third member made of a filler material of the same type as the second member are joined together, wherein a plating layer made of the same type of material as the second member is formed on the surface of the first member, and the plating layer includes a first plating layer formed on the surface of the first member facing the second member and a second plating layer formed on the surface of the first member opposite the first plating layer, the first member has a penetration portion that penetrates in the stacking direction, and the third member has a stacking portion that solidifies inside the penetration portion and extends in the stacking direction, a first joint portion that is formed integrally with the stacking portion and bonded to the first plating layer and the second member, and a second joint portion that is formed integrally with the stacking portion and bonded to the second plating layer.
  • the overlapping portion between the first member and the second member is made of the same material. Furthermore, the joint between the first joint portion of the third member and the first plating layer and second member, and the joint between the second joint portion and the second plating layer are also made of the same material.
  • the second member in the joining structure of the first aspect, is provided with a recess that is recessed in the stacking direction at a position corresponding to the through-hole, and the periphery of the recess is located outside the periphery of the through-hole when viewed from the stacking direction.
  • the third member when the molten third member is caused to flow from the through-hole toward the recess, the third member spreads outward beyond the through-hole, making it easier to join the first joining portion of the third member to the first plating layer.
  • the distance between the periphery of the recess and the periphery of the through-hole is at least 0.5 mm.
  • the through-hole is formed in a circular shape, and the hole diameter of the through-hole is ⁇ 7 mm or more.
  • the penetration portion by forming the penetration portion into a circular shape and appropriately setting the hole diameter of the penetration portion, it becomes easier to insert the third member, which serves as a filler material, through the penetration portion. Furthermore, the joining area between the second and third members can be increased, ensuring sufficient joining strength.
  • the through-hole is formed in a rectangular shape, and the length of the short side of the through-hole is 7 mm or more.
  • the penetration portion by forming the penetration portion into a rectangular shape and appropriately setting the length of the short side of the penetration portion, it becomes easier to insert the third member, acting as a filler material, through the penetration portion. Furthermore, the joining area between the second and third members can be increased, ensuring sufficient joining strength.
  • the second member and the plating layer are made of copper or aluminum.
  • the second member and plating layer are made of copper or aluminum.
  • the first member may be made of, for example, an iron-based metal material.
  • the peripheral edge of the penetration portion is formed into a shape that is bent in the stacking direction.
  • the peripheral edge of the through-hole can be bent to increase the bonding area between the third member and the plating layer.
  • the peripheral edge of the through-hole can be bent.
  • burrs or the like that occur on the peripheral edge of the through-hole can be used to form the peripheral edge of the through-hole in a bent shape.
  • FIG. 1 is a perspective view for explaining a joining structure according to the first embodiment.
  • FIG. 2 is a side cross-sectional view for explaining the joining structure.
  • FIG. 3 is a diagram showing the relationship between the inner diameter of the through portion and the inner diameter of the recessed portion.
  • FIG. 4 is a side cross-sectional view for explaining a joining structure according to the second embodiment.
  • FIG. 5 is a side cross-sectional view for explaining a joint structure according to the third embodiment.
  • FIG. 6 is a side cross-sectional view for explaining a joint structure according to the fourth embodiment.
  • FIG. 7 is a side cross-sectional view for explaining a joint structure according to the fifth embodiment.
  • FIG. 8 is a side cross-sectional view for explaining a joint structure according to the sixth embodiment.
  • FIG. 1 is a perspective view for explaining a joining structure according to the first embodiment.
  • FIG. 2 is a side cross-sectional view for explaining the joining structure.
  • FIG. 3 is a diagram showing the relationship
  • FIG. 9 is a side cross-sectional view for explaining a joint structure according to the seventh embodiment.
  • FIG. 10 is a side cross-sectional view for explaining a joint structure according to the eighth embodiment.
  • FIG. 11 is a side cross-sectional view for explaining a joint structure according to the ninth embodiment.
  • FIG. 12 is a side cross-sectional view for explaining the joint structure according to the tenth embodiment.
  • FIG. 13 is a side cross-sectional view for explaining a joint structure according to the eleventh embodiment.
  • FIG. 14 is a perspective view for explaining a joint structure according to another embodiment.
  • First Embodiment 1 and 2 show a joining structure for joining together a first member 10 made of a metal material, a second member 20 made of a material that is difficult to weld to the first member 10 and laminated on the first member 10, and a third member 30 made of a filler material.
  • the first member 10 is a plate-shaped member made of a metal material.
  • a plating layer 15 is provided on the surface of the first member 10.
  • the plating layer 15 is made of the same type of material as the second member 20.
  • the plating layer 15 includes a first plating layer 15a and a second plating layer 15b.
  • the first plating layer 15a is provided on the surface of the first member 10 facing the second member 20 (the bottom surface in FIG. 2).
  • the second plating layer 15b is provided on the surface of the first member 10 opposite the first plating layer 15a (the top surface in FIG. 2).
  • the plating layer 15 may also be provided on the outer periphery of the first member 10 so as to cover the entire first member 10.
  • the first member 10 is provided with a through-hole 11 that penetrates in the stacking direction.
  • the through-hole 11 is a circular through-hole.
  • the second member 20 is a plate-shaped member made of a material that is difficult to weld to the first member 10.
  • the second member 20 is placed on the underside of the first member 10.
  • the second member 20 has a recess 21 that is recessed in the stacking direction at a position corresponding to the through-hole 11.
  • the recess 21 is formed in a circular shape.
  • the periphery of the recess 21 is located outside the periphery of the through-hole 11 when viewed in the stacking direction.
  • the third member 30 is composed of a filler metal that is the same type of metal as the plating layer 15 of the first member 10 and the second member 20.
  • homogeneous metal materials refers to metals that can be welded to each other, and not just metals made of the same material, but also metals that have good weldability, such as ferrous metals and non-ferrous metals. In other words, “homogeneous metal materials” refer to materials of the same type that are compatible for welding.
  • combinations of the second member 20 and the third member 30 during welding include the following.
  • combinations of ferrous metals include mild steel and mild steel, stainless steel and stainless steel, and mild steel and high-tensile steel (high-tensile steel).
  • combinations of non-ferrous metals include aluminum and aluminum, aluminum and aluminum alloys, aluminum alloys and aluminum alloys, copper and copper, copper and copper alloys, and copper alloys and copper alloys.
  • the second member 20 which is a dissimilar material, is made of a material different from that of the first member 10, and is difficult to weld to the first member 10.
  • the second member 20 as a dissimilar material is a non-ferrous metal material such as copper or aluminum.
  • the third member 30 has a laminated portion 31, a first joint portion 32, and a second joint portion 33.
  • the laminated portion 31 is formed by solidifying molten filler material inside the penetration portion 11.
  • the laminated portion 31 extends inside the penetration portion 11 in the lamination direction.
  • the first joint 32 is formed integrally with the lower end of the laminated portion 31 in the stacking direction.
  • the first joint 32 protrudes outward beyond the through-hole 11.
  • the first joint 32 is joined to the first plating layer 15a and the second member 20. Specifically, the first joint 32 is welded to the peripheral edge of the through-hole 11 in the first plating layer 15a of the first member 10 and to the second member 20.
  • the second joint portion 33 is integral with the upper end portion of the laminate portion 31 in the stacking direction.
  • the second joint portion 33 protrudes outward beyond the through-hole 11.
  • the second joint portion 33 is joined to the second plating layer 15b. Specifically, the second joint portion 33 is welded to the periphery of the through-hole 11 in the second plating layer 15b of the first member 10.
  • the first joint 32 pulls the second member 20 upward, and the second joint 33 presses the first member 10 downward, thereby compressing and fixing the first member 10 and the second member 20.
  • aluminum plating is used for the plating layer 15 of the first member 10
  • aluminum material is used for the second member 20
  • aluminum material is used for the third member 30, which is the filler material
  • copper may be used instead of aluminum.
  • copper plating is used for the plating layer 15 of the first member 10
  • copper material is used for the second member 20
  • copper material is used for the third member 30, which is the filler material.
  • the arc welding machine 1 includes a nozzle 2 and a tip 3.
  • the nozzle 2 supplies a shielding gas, etc., to the welding point of the workpiece.
  • the tip 3 supplies a welding current to a third member 30, which serves as a filler metal.
  • the first member 10 is stacked on top of the second member 20.
  • the second member 20 is positioned so that the surface on the opening side of the recess 21 abuts the first member 10.
  • the through-hole 11 of the first member 10 and the recess 21 of the second member 20 are positioned approximately concentrically when viewed from the stacking direction.
  • the arc welding machine 1 generates an arc 5 by supplying a welding current while feeding a third member 30, which is a filler material of the same type as the second member 20.
  • the molten third member 30 After the molten third member 30 completely fills the recess 21, it is filled inside the through-hole 11 and laminated. Then, after the molten third member 30 completely fills the inside of the through-hole 11, it flows outward from the periphery of the through-hole 11 and spreads out in a flange shape.
  • a third member 30 which has a laminated portion 31, a first joint portion 32 formed integrally with the laminated portion 31, and a second joint portion 33 formed integrally with the laminated portion 31.
  • the first bonding portion 32 is filled into the recess 21 and is bonded to the second member 20. Furthermore, the first bonding portion 32 protrudes outward beyond the through-hole 11 within the recess 21 of the second member 20 and is bonded to the peripheral edge of the through-hole 11 in the first plating layer 15a.
  • the second bonding portion 33 extends outward beyond the periphery of the through-hole 11 and is bonded to the periphery of the through-hole 11 in the second plating layer 15b.
  • the welding condition will be "X”.
  • the inner diameter of the recess 21 of the second member 20 is set to ⁇ 9 mm or ⁇ 10 mm, the welding condition will be "O”.
  • the inner diameter of the recess 21 in the second member 20 needs to be larger than the inner diameter of the through-hole 11 in the first member 10.
  • the distance between the periphery of the recess 21 and the periphery of the through-hole 11 be at least 0.5 mm or more.
  • the molten third member 30 can be sufficiently filled into the recess 21. This makes it possible to form the first joint 32 and the second joint 33 with appropriate shapes.
  • the overlapping portions of the first member 10 and the second member 20 are tightly attached, making it difficult for moisture to penetrate from the outside.
  • the laminated portion 31 arranged inside the through-hole 11 will be in contact with the first member 10. Furthermore, cracks may occur in the laminated portion 31 due to differences in the thermal contraction speed between the first member 10 and the third member 30 when the third member 30 solidifies, or due to changes over time. Furthermore, if moisture penetrates into the gap between the through-hole 11 and the laminated portion 31, intermetallic compounds may be formed.
  • the third member 30 spreads outward beyond the through-hole 11, making it easier to bond the first bonding portion 32 of the third member 30 to the first plating layer 15a. It is also possible to form a wide first bonding portion 32.
  • the second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11.
  • the recess 21 has an inclined portion 25 that slopes toward the bottom of the recess 21.
  • the opening width of the recess 21 is larger than the inner diameter of the through-hole 11.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 flows along the inclined portion 25 of the recess 21 and is joined to the second member 20. Inside the recess 21, the molten third member 30 spreads so that it protrudes radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the provision of the inclined portion 25 in the recess 21 makes it easier for the molten third member 30 to flow toward the bottom of the recess 21.
  • the second member 20 is provided with a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11.
  • the recess 21 has a step portion 26 formed in a circular shape when viewed from the stacking direction, and an inclined portion 25 inclined from the step portion 26 toward the bottom of the recess 21.
  • the opening width of the recess 21 is larger than the inner diameter of the through-hole 11.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 flows along the inclined portion 25 of the recess 21 and is joined to the second member 20. Inside the recess 21, the molten third member 30 fills the inclined portion 25 and the stepped portion 26, spreading radially outward beyond the through portion 11, and the first joining portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the joining area of the third member 30 can be increased compared to when the bottom of the recess 21 is only a flat surface.
  • the second member 20 is provided with a recess 21 recessed in the stacking direction at a position corresponding to the through portion 11.
  • the recess 21 has a step portion 26 formed in a circular shape when viewed from the stacking direction, a flat portion 27 provided at the bottom of the recess 21, and an inclined portion 25 inclined from the step portion 26 toward the flat portion 27.
  • the opening width of the recess 21 is larger than the inner diameter of the through portion 11.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 flows along the inclined portion 25 of the recess 21 toward the flat portion 27 and is joined to the second member 20. Inside the recess 21, the molten third member 30 fills the inclined portion 25, the stepped portion 26, and the flat portion 27, spreading radially outward beyond the through portion 11, and the first joining portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the joining structure according to this embodiment by providing the recess 21 with the inclined portion 25, the stepped portion 26, and the flat portion 27, the joining area of the third member 30 can be increased compared to when the bottom of the recess 21 is only a flat surface.
  • the first member 10 has a through portion 11.
  • the through portion 11 has a tapered portion 12 that tapers toward the second member 20.
  • the taper angle of the tapered portion 12 is preferably set in the range of 30° to 120°, for example.
  • the second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11.
  • the recess 21 is formed in a circular shape when viewed in the stacking direction.
  • the opening width of the recess 21 is larger than the inner diameter of the through-hole 11 on the second member 20 side.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 flows along the tapered portion 12 of the penetration portion 11, gathering at the center of the penetration portion 11.
  • the joining structure according to this embodiment allows the molten third member 30 to easily flow toward the center of the penetration portion 11. Furthermore, by increasing the width of the second joining portion 33, the joining area with the second plating layer 15b can be increased, ensuring sufficient joining strength.
  • the first member 10 has a through portion 11.
  • the through portion 11 has a tapered portion 12 that tapers toward the side opposite to the second member 20.
  • the taper angle of the tapered portion 12 is preferably set in the range of 30° to 120°, for example.
  • the second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11.
  • the recess 21 is formed in a circular shape when viewed in the stacking direction.
  • the opening width of the recess 21 is larger than the inner diameter of the through-hole 11 on the second member 20 side.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 fills the recess 21 and is joined to the second member 20.
  • the molten third member 30 spreads so as to protrude radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the joining structure according to this embodiment allows the molten third member 30 to flow along the tapered portion 12 of the through portion 11 to the corners of the recess 21. Furthermore, by increasing the width of the first joining portion 32, the joining area with the second member 20 is increased, ensuring sufficient joining strength.
  • the second member 20 is provided with a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11.
  • the recess 21 is formed by pressing a part of the second member 20 so that it bulges out on the side opposite to the first member 10.
  • the opening width of the recess 21 is larger than the inner diameter of the through-hole 11 on the second member 20 side.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 fills the recess 21 and is joined to the second member 20.
  • the molten third member 30 spreads so as to protrude radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the first member 10 has a through-hole 11.
  • the peripheral portion of the through-hole 11 is formed in a shape that is bent in the stacking direction.
  • the peripheral portion of the through-hole 11 is bent in a convex shape toward the side opposite the second member 20 (the upper side in Fig. 10 ).
  • the peripheral portion of the through-hole 11 is bent at 45 degrees with respect to the lower surface of the first member 10, but it may also be bent at an angle in the range of 15 degrees to 60 degrees, for example.
  • the peripheral edge of the through-hole 11 can be given a bent shape.
  • burrs or the like that occur on the peripheral edge of the through-hole 11 can be used to give the peripheral edge of the through-hole 11 a bent shape.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 fills the space partitioned between the bent portion around the periphery of the through portion 11 in the first member 10 and the second member 20, and is joined to the second member 20.
  • the molten third member 30 spreads outward in the radial direction beyond the through portion 11, and the first joint portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the peripheral edge of the through-hole 11 is bent, thereby increasing the joining area between the third member 30 and the plating layer 15.
  • the first member 10 has a through-hole 11.
  • the peripheral portion of the through-hole 11 is formed in a shape that is bent in the stacking direction.
  • the peripheral portion of the through-hole 11 is bent in a convex shape toward the side opposite the second member 20 (the upper side in Fig. 11 ).
  • the peripheral portion of the through-hole 11 is bent at 90° with respect to the lower surface of the first member 10.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 fills the space partitioned between the bent portion around the periphery of the through portion 11 in the first member 10 and the second member 20, and is joined to the second member 20.
  • the molten third member 30 spreads outward in the radial direction beyond the through portion 11, and the first joint portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the peripheral edge of the through-hole 11 is bent, thereby increasing the joining area between the third member 30 and the plating layer 15.
  • the first member 10 has a through-hole 11.
  • the peripheral portion of the through-hole 11 is formed in a shape that is bent in the stacking direction.
  • the peripheral portion of the through-hole 11 is bent in a convex shape toward the side facing the second member 20 (the lower side in Fig. 12 ).
  • the peripheral portion of the through-hole 11 is bent at 45 degrees with respect to the upper surface of the first member 10, but it may also be bent at an angle in the range of 15 degrees to 60 degrees, for example.
  • the second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11.
  • the recess 21 is formed in a circular shape when viewed in the stacking direction.
  • the recess 21 accommodates a portion of the curved portion of the periphery of the through-hole 11 in the first member 10.
  • the opening width of the recess 21 is larger than the inner diameter of the through-hole 11.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 fills the recess 21 and is joined to the second member 20. Inside the recess 21, the molten third member 30 spreads so as to protrude radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the peripheral edge of the through-hole 11 is bent, thereby increasing the joining area between the third member 30 and the plating layer 15.
  • the first member 10 has a through-hole 11.
  • the peripheral portion of the through-hole 11 is formed in a shape that is bent in the stacking direction.
  • the peripheral portion of the through-hole 11 is bent in a convex shape toward the side facing the second member 20 (the lower side in Fig. 13 ).
  • the peripheral portion of the through-hole 11 is bent at 90° with respect to the upper surface of the first member 10.
  • the second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11.
  • the recess 21 is formed in a circular shape when viewed in the stacking direction.
  • the recess 21 accommodates a portion of the curved portion of the periphery of the through-hole 11 in the first member 10.
  • the opening width of the recess 21 is larger than the inner diameter of the through-hole 11.
  • the third member 30 is melted by arc welding.
  • the molten third member 30 fills the recess 21 and is joined to the second member 20. Inside the recess 21, the molten third member 30 spreads so as to protrude radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.
  • the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.
  • the peripheral edge of the through-hole 11 is bent, thereby increasing the joining area between the third member 30 and the plating layer 15.
  • the penetration portion 11 of the first member 10 is a circular through-hole, and during arc welding, the third member 30 is fed as a filler material toward the penetration portion 11 while the welding point as the welding location is stopped, but this is not limited to this form.
  • the penetration portion 11 of the first member 10 may be a rectangular through-hole, and during arc welding, the welding point may be moved from one end of the penetration portion 11 to the other end in the longitudinal direction while the third member 30 is fed as a filler material toward the penetration portion 11.
  • the length of the short side of the through-hole 11 be 7 mm or more. This makes it easier to insert the third member 30, which serves as a filler material, through the through-hole 11. It also increases the bonding area between the second member 20 and the third member 30, ensuring bonding strength.
  • the present invention has the highly practical effect of suppressing the occurrence of electrolytic corrosion in the overlapping portions of the first, second, and third members, making it extremely useful and highly applicable industrially.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

A third member 30 comprises a laminated part 31, a first joining part 32 and a second joining part 33. The laminated part 31 is solidified inside a penetration part 11 and extends in the lamination direction. The first joining part 32 is integrally provided with the laminated part 31, and is joined to a first plating layer 15a and a second member 20. The second joining part 33 is integrally provided with the laminated part 31 and is joined to a second plating layer 15b.

Description

接合構造Joint structure

　本発明は、接合構造に関するものである。 The present invention relates to a joining structure.

　特許文献１には、第１部材（第１の金属材）と、第１部材に対して溶接が困難な第２部材（異種材）とを重ね合わせた状態にし、第２部材の貫通部を介して第３部材（第３の材料）を溶融してアーク溶接するようにした接合構造が開示されている。 Patent Document 1 discloses a joining structure in which a first member (first metal material) and a second member (dissimilar material) that is difficult to weld to the first member are overlapped, and a third member (third material) is melted and arc-welded through a penetration in the second member.

　このとき、溶融した第３部材によって、第２部材の貫通部の上面側の外周部に覆い被さるようにつば部分を形成する。これにより、第１部材に対する第３部材の凝固収縮によるつば部分と第１部材との圧縮固定力によって、第１部材と第２部材とを固定するようにしている。 At this time, the molten third member forms a flange that covers the outer periphery of the upper surface of the penetration portion of the second member. This secures the first and second members together through the compressive fixing force between the flange and the first member due to the solidification and shrinkage of the third member relative to the first member.

国際公開第２０１８／０３０２７２号International Publication No. 2018/030272

　ところで、特許文献１の発明では、第３部材のつば部分と第２部材との重ね合わせ面の隙間と、第１部材と第２部材との重ね合わせ面の隙間とを通って、外部から水分が侵入するおそれがある。そして、侵入した水分によって、第３部材のつば部分と第２部材とが重なり合う部分と、第１部材と第２部材とが重なり合う部分とで電食が発生して、接合強度が低下するおそれがある。 However, with the invention of Patent Document 1, there is a risk that moisture may enter from the outside through the gap between the overlapping surfaces of the flange portion of the third member and the second member, and the gap between the overlapping surfaces of the first member and the second member. The moisture that enters may then cause electrolytic corrosion in the overlapping portion of the flange portion of the third member and the second member, and in the overlapping portion of the first member and the second member, potentially reducing the joint strength.

　本開示の態様は、かかる点に鑑みてなされたものであり、その目的は、第１部材、第２部材、及び第３部材のそれぞれの重ね合わせ部分において、電食が発生するのを抑えることにある。 The aspects of the present disclosure were made in consideration of these points, and their purpose is to prevent electrolytic corrosion from occurring in the overlapping portions of the first, second, and third members.

　第１の態様は、金属材で構成された第１部材と、前記第１部材に対して溶接が困難な材料で構成されて前記第１部材に積層された第２部材と、前記第２部材と同種系の溶加材で構成された第３部材と、が互いに接合された接合構造であって、前記第１部材の表面には、前記第２部材と同種系の材料で構成されたメッキ層が設けられ、前記メッキ層は、前記第１部材における前記第２部材に対向する面に設けられた第１メッキ層と、前記第１部材における前記第１メッキ層とは反対側の面に設けられた第２メッキ層と、を含み、前記第１部材には、積層方向に貫通する貫通部が設けられ、前記第３部材は、前記貫通部の内部で凝固して積層方向に延びる積層部と、前記積層部と一体に設けられ、前記第１メッキ層及び前記第２部材に接合された第１接合部と、前記積層部と一体に設けられ、前記第２メッキ層に接合された第２接合部と、を有する。 The first aspect is a joint structure in which a first member made of a metallic material, a second member made of a material that is difficult to weld to the first member and laminated on the first member, and a third member made of a filler material of the same type as the second member are joined together, wherein a plating layer made of the same type of material as the second member is formed on the surface of the first member, and the plating layer includes a first plating layer formed on the surface of the first member facing the second member and a second plating layer formed on the surface of the first member opposite the first plating layer, the first member has a penetration portion that penetrates in the stacking direction, and the third member has a stacking portion that solidifies inside the penetration portion and extends in the stacking direction, a first joint portion that is formed integrally with the stacking portion and bonded to the first plating layer and the second member, and a second joint portion that is formed integrally with the stacking portion and bonded to the second plating layer.

　第１の態様では、第２部材と同種系の材料で構成されたメッキ層を、第１部材の表面に設けることで、第１部材と第２部材との重ね合わせ部分が同種系の材料で構成される。また、第３部材の第１接合部と第１メッキ層及び第２部材との接合部分、及び第２接合部と第２メッキ層との接合部分についても、同種系の材料で構成される。 In the first aspect, by providing a plating layer made of the same material as the second member on the surface of the first member, the overlapping portion between the first member and the second member is made of the same material. Furthermore, the joint between the first joint portion of the third member and the first plating layer and second member, and the joint between the second joint portion and the second plating layer are also made of the same material.

　このように、第１部材、第２部材、及び第３部材のそれぞれの重ね合わせ部分において、金属材と異種材とが直接的に重なり合う部分を無くすことで、電食が発生するのを抑え、接合強度を確保することができる。 In this way, by eliminating the areas where the metal material and the dissimilar material directly overlap in the overlapping portions of the first, second, and third members, it is possible to prevent electrolytic corrosion and ensure sufficient joint strength.

　また、第１接合部と第２接合部とによって、第１部材と第２部材とを圧縮固定することで、第１部材及び第２部材の重ね合わせ部分を密着させて、外部から水分が侵入し難くなる。 Furthermore, by compressing and fixing the first and second members using the first and second joints, the overlapping portions of the first and second members are tightly attached, making it difficult for moisture to penetrate from the outside.

　また、貫通部の内周面にメッキ層が設けられておらず、第１部材が貫通部から露出した状態であっても、第１接合部を第１メッキ層に接合し、第２接合部を第２メッキ層に接合することで、貫通部の内周面に向かって外部から水分が侵入するのを抑えることができる。これにより、第１部材における貫通部の内周面で電食が発生するのを抑え、接合強度を確保することができる。 Furthermore, even if no plating layer is provided on the inner circumferential surface of the penetration portion and the first member is exposed from the penetration portion, by joining the first joint portion to the first plating layer and the second joint portion to the second plating layer, it is possible to prevent moisture from penetrating from the outside toward the inner circumferential surface of the penetration portion. This prevents electrolytic corrosion from occurring on the inner circumferential surface of the penetration portion of the first member and ensures joint strength.

　第２の態様は、第１の態様の接合構造において、前記第２部材には、前記貫通部に対応する位置で前記積層方向に窪む凹部が設けられ、前記凹部の周縁は、前記積層方向から見て、前記貫通部の周縁よりも外側に位置する。 In the second aspect, in the joining structure of the first aspect, the second member is provided with a recess that is recessed in the stacking direction at a position corresponding to the through-hole, and the periphery of the recess is located outside the periphery of the through-hole when viewed from the stacking direction.

　第２の態様では、溶融した第３部材を貫通部から凹部に向かって流入させた際に、第３部材が貫通部よりも外側に広がることで、第３部材の第１接合部を第１メッキ層に接合し易くなる。 In the second aspect, when the molten third member is caused to flow from the through-hole toward the recess, the third member spreads outward beyond the through-hole, making it easier to join the first joining portion of the third member to the first plating layer.

　第３の態様は、第２の態様の接合構造において、前記凹部の周縁と前記貫通部の周縁との間の距離は、少なくとも０．５ｍｍ以上である。 In a third aspect, in the joining structure of the second aspect, the distance between the periphery of the recess and the periphery of the through-hole is at least 0.5 mm.

　第３の態様では、凹部の周縁と貫通部の周縁との間の距離を適切に設定することで、第３部材の第１接合部を第１メッキ層に接合し易くなる。 In the third aspect, by appropriately setting the distance between the periphery of the recess and the periphery of the through-hole, it becomes easier to join the first joining portion of the third member to the first plating layer.

　第４の態様は、第１～３の態様の何れか１つの接合構造において、前記貫通部は、円形状に形成され、前記貫通部の孔径は、φ７ｍｍ以上である。 In a fourth aspect, in the joining structure of any one of the first to third aspects, the through-hole is formed in a circular shape, and the hole diameter of the through-hole is φ7 mm or more.

　第４の態様では、貫通部を円形状に形成し、貫通部の孔径を適切に設定することで、溶加材としての第３部材を貫通部から挿入し易くなる。また、第２部材と第３部材との接合面積を増やし、接合強度を確保することができる。 In the fourth aspect, by forming the penetration portion into a circular shape and appropriately setting the hole diameter of the penetration portion, it becomes easier to insert the third member, which serves as a filler material, through the penetration portion. Furthermore, the joining area between the second and third members can be increased, ensuring sufficient joining strength.

　第５の態様は、第１～３の態様の何れか１つの接合構造において、前記貫通部は、長方形状に形成され、前記貫通部における短辺の長さは、７ｍｍ以上である。 In a fifth aspect, in the joining structure of any one of the first to third aspects, the through-hole is formed in a rectangular shape, and the length of the short side of the through-hole is 7 mm or more.

　第５の態様では、貫通部を長方形状に形成し、貫通部における短辺の長さを適切に設定することで、溶加材としての第３部材を貫通部から挿入し易くなる。また、第２部材と第３部材との接合面積を増やし、接合強度を確保することができる。 In the fifth aspect, by forming the penetration portion into a rectangular shape and appropriately setting the length of the short side of the penetration portion, it becomes easier to insert the third member, acting as a filler material, through the penetration portion. Furthermore, the joining area between the second and third members can be increased, ensuring sufficient joining strength.

　第６の態様は、第１～３の態様の何れか１つの接合構造において、前記第２部材及び前記メッキ層は、銅またはアルミニウムで構成される。 In a sixth aspect, in the joining structure of any one of the first to third aspects, the second member and the plating layer are made of copper or aluminum.

　第６の態様では、第２部材及びメッキ層を銅またはアルミニウムで構成するようにしている。この場合、第１部材は、例えば、鉄系金属材で構成すればよい。 In a sixth aspect, the second member and plating layer are made of copper or aluminum. In this case, the first member may be made of, for example, an iron-based metal material.

　第７の態様は、第１～３の態様の何れか１つの接合構造において、前記貫通部の周縁部分は、前記積層方向に屈曲した形状に形成される。 In a seventh aspect, in the joining structure of any one of the first to third aspects, the peripheral edge of the penetration portion is formed into a shape that is bent in the stacking direction.

　第７の態様では、貫通部の周縁部分を屈曲させることで、第３部材とメッキ層との接合面積を増やすことができる。例えば、プレス加工で貫通部を形成することで、貫通部の周縁部分を屈曲させた形状とすることができる。また、例えば、ドリルを用いた穴開け加工で貫通部を形成することで、貫通部の周縁に発生したバリ等によって、貫通部の周縁部分を屈曲させた形状とすることができる。 In the seventh aspect, the peripheral edge of the through-hole can be bent to increase the bonding area between the third member and the plating layer. For example, by forming the through-hole by press working, the peripheral edge of the through-hole can be bent. Also, for example, by forming the through-hole by drilling, burrs or the like that occur on the peripheral edge of the through-hole can be used to form the peripheral edge of the through-hole in a bent shape.

　本開示の態様によれば、第１部材、第２部材、及び第３部材のそれぞれの重ね合わせ部分において、電食が発生するのを抑えることができる。 According to this aspect of the disclosure, it is possible to prevent electrolytic corrosion from occurring in the overlapping portions of the first, second, and third members.

図１は、本実施形態１に係る接合構造を説明するための斜視図である。FIG. 1 is a perspective view for explaining a joining structure according to the first embodiment. 図２は、接合構造を説明するための側面断面図である。FIG. 2 is a side cross-sectional view for explaining the joining structure. 図３は、貫通部の内径と凹部の内径との関係を示す図である。FIG. 3 is a diagram showing the relationship between the inner diameter of the through portion and the inner diameter of the recessed portion. 図４は、本実施形態２に係る接合構造を説明するための側面断面図である。FIG. 4 is a side cross-sectional view for explaining a joining structure according to the second embodiment. 図５は、本実施形態３に係る接合構造を説明するための側面断面図である。FIG. 5 is a side cross-sectional view for explaining a joint structure according to the third embodiment. 図６は、本実施形態４に係る接合構造を説明するための側面断面図である。FIG. 6 is a side cross-sectional view for explaining a joint structure according to the fourth embodiment. 図７は、本実施形態５に係る接合構造を説明するための側面断面図である。FIG. 7 is a side cross-sectional view for explaining a joint structure according to the fifth embodiment. 図８は、本実施形態６に係る接合構造を説明するための側面断面図である。FIG. 8 is a side cross-sectional view for explaining a joint structure according to the sixth embodiment. 図９は、本実施形態７に係る接合構造を説明するための側面断面図である。FIG. 9 is a side cross-sectional view for explaining a joint structure according to the seventh embodiment. 図１０は、本実施形態８に係る接合構造を説明するための側面断面図である。FIG. 10 is a side cross-sectional view for explaining a joint structure according to the eighth embodiment. 図１１は、本実施形態９に係る接合構造を説明するための側面断面図である。FIG. 11 is a side cross-sectional view for explaining a joint structure according to the ninth embodiment. 図１２は、本実施形態１０に係る接合構造を説明するための側面断面図である。FIG. 12 is a side cross-sectional view for explaining the joint structure according to the tenth embodiment. 図１３は、本実施形態１１に係る接合構造を説明するための側面断面図である。FIG. 13 is a side cross-sectional view for explaining a joint structure according to the eleventh embodiment. 図１４は、その他の実施形態に係る接合構造を説明するための斜視図である。FIG. 14 is a perspective view for explaining a joint structure according to another embodiment.

　以下、本発明の実施形態を図面に基づいて説明する。なお、以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。 Embodiments of the present invention will now be described with reference to the drawings. Note that the following description of the preferred embodiment is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

　《実施形態１》
　図１及び図２は、金属材で構成された第１部材１０と、第１部材１０に対して溶接が困難な材料で構成されて第１部材１０に積層された第２部材２０と、溶加材で構成された第３部材３０と、を互いに接合するための接合構造を示す。 First Embodiment
1 and 2 show a joining structure for joining together a first member 10 made of a metal material, a second member 20 made of a material that is difficult to weld to the first member 10 and laminated on the first member 10, and a third member 30 made of a filler material.

　第１部材１０は、金属材で構成された板状の部材である。第１部材１０の表面には、メッキ層１５が設けられる。メッキ層１５は、第２部材２０と同種系の材料で構成される。 The first member 10 is a plate-shaped member made of a metal material. A plating layer 15 is provided on the surface of the first member 10. The plating layer 15 is made of the same type of material as the second member 20.

　メッキ層１５は、第１メッキ層１５ａと、第２メッキ層１５ｂと、を含む。第１メッキ層１５ａは、第１部材１０における第２部材２０に対向する面（図２では下面）に設けられる。第２メッキ層１５ｂは、第１部材１０における第１メッキ層１５ａとは反対側の面（図２では上面）に設けられる。 The plating layer 15 includes a first plating layer 15a and a second plating layer 15b. The first plating layer 15a is provided on the surface of the first member 10 facing the second member 20 (the bottom surface in FIG. 2). The second plating layer 15b is provided on the surface of the first member 10 opposite the first plating layer 15a (the top surface in FIG. 2).

　なお、メッキ層１５は、第１部材１０全体を覆うように、第１部材１０の外周部にも設けられていてもよい。第１部材１０には、積層方向に貫通する貫通部１１が設けられる。貫通部１１は、円形状の貫通孔である。 The plating layer 15 may also be provided on the outer periphery of the first member 10 so as to cover the entire first member 10. The first member 10 is provided with a through-hole 11 that penetrates in the stacking direction. The through-hole 11 is a circular through-hole.

　第２部材２０は、第１部材１０に対して溶接が困難な材料で構成された板状の部材である。第２部材２０は、第１部材１０の下側に重ね合わされる。第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、円形状に形成される。凹部２１の周縁は、積層方向から見て、貫通部１１の周縁よりも外側に位置する。 The second member 20 is a plate-shaped member made of a material that is difficult to weld to the first member 10. The second member 20 is placed on the underside of the first member 10. The second member 20 has a recess 21 that is recessed in the stacking direction at a position corresponding to the through-hole 11. The recess 21 is formed in a circular shape. The periphery of the recess 21 is located outside the periphery of the through-hole 11 when viewed in the stacking direction.

　第３部材３０は、第１部材１０のメッキ層１５及び第２部材２０と同種系の金属材である溶加材で構成される。ここで、同種系の金属材とは、互いに溶接可能な金属であり、同じ材質同士だけではなく、鉄系金属材同士、非鉄系金属材同士などの溶接接合性がよい金属材のことである。言い換えると、同種系の金属材とは、溶接の相性がよい同種系の材料のことである。 The third member 30 is composed of a filler metal that is the same type of metal as the plating layer 15 of the first member 10 and the second member 20. Here, "homogeneous metal materials" refers to metals that can be welded to each other, and not just metals made of the same material, but also metals that have good weldability, such as ferrous metals and non-ferrous metals. In other words, "homogeneous metal materials" refer to materials of the same type that are compatible for welding.

　具体的には、溶接時における第２部材２０と第３部材３０との組み合わせとしては、以下のものが挙げられる。例えば、鉄系金属材の組合せとしては、軟鋼と軟鋼、ステンレスとステンレス、軟鋼とハイテン（高張力鋼）等がある。また、非鉄系金属材としては、アルミニウムとアルミニウム、アルミニウムとアルミニウム合金、アルミニウム合金とアルミニウム合金、銅と銅、銅と銅合金、銅合金と銅合金等がある。 Specific combinations of the second member 20 and the third member 30 during welding include the following. For example, combinations of ferrous metals include mild steel and mild steel, stainless steel and stainless steel, and mild steel and high-tensile steel (high-tensile steel). Furthermore, combinations of non-ferrous metals include aluminum and aluminum, aluminum and aluminum alloys, aluminum alloys and aluminum alloys, copper and copper, copper and copper alloys, and copper alloys and copper alloys.

　また、異種材としての第２部材２０は、第１部材１０とは異なる材質の材料であり、第１部材１０に対して溶接が困難な材質である。 Furthermore, the second member 20, which is a dissimilar material, is made of a material different from that of the first member 10, and is difficult to weld to the first member 10.

　例えば、金属材としての第１部材１０を鉄系金属材にした場合、異種材としての第２部材２０は、銅材やアルミニウム材等の非鉄系金属材である。 For example, if the first member 10 as a metal material is an iron-based metal material, the second member 20 as a dissimilar material is a non-ferrous metal material such as copper or aluminum.

　第３部材３０は、積層部３１と、第１接合部３２と、第２接合部３３と、を有する。積層部３１は、溶融した溶加材が貫通部１１の内部で凝固することで構成される。積層部３１は、貫通部１１の内部を積層方向に延びる。 The third member 30 has a laminated portion 31, a first joint portion 32, and a second joint portion 33. The laminated portion 31 is formed by solidifying molten filler material inside the penetration portion 11. The laminated portion 31 extends inside the penetration portion 11 in the lamination direction.

　第１接合部３２は、積層部３１における積層方向の下端部と一体に設けられる。第１接合部３２は、貫通部１１よりも外方に張り出す。第１接合部３２は、第１メッキ層１５ａ及び第２部材２０に接合される。具体的に、第１接合部３２は、第１部材１０の第１メッキ層１５ａにおける貫通部１１の周縁部と、第２部材２０と、に溶接される。 The first joint 32 is formed integrally with the lower end of the laminated portion 31 in the stacking direction. The first joint 32 protrudes outward beyond the through-hole 11. The first joint 32 is joined to the first plating layer 15a and the second member 20. Specifically, the first joint 32 is welded to the peripheral edge of the through-hole 11 in the first plating layer 15a of the first member 10 and to the second member 20.

　第２接合部３３は、積層部３１における積層方向の上端部と一体に設けられる。第２接合部３３は、貫通部１１よりも外方に張り出す。第２接合部３３は、第２メッキ層１５ｂに接合される。具体的に、第２接合部３３は、第１部材１０の第２メッキ層１５ｂにおける貫通部１１の周縁部に溶接される。 The second joint portion 33 is integral with the upper end portion of the laminate portion 31 in the stacking direction. The second joint portion 33 protrudes outward beyond the through-hole 11. The second joint portion 33 is joined to the second plating layer 15b. Specifically, the second joint portion 33 is welded to the periphery of the through-hole 11 in the second plating layer 15b of the first member 10.

　第３部材３０が凝固収縮すると、第１接合部３２が第２部材２０を上方に引っ張るとともに、第２接合部３３が第１部材１０を下方に押さえることで、第１部材１０及び第２部材２０が圧縮固定される。 When the third member 30 solidifies and shrinks, the first joint 32 pulls the second member 20 upward, and the second joint 33 presses the first member 10 downward, thereby compressing and fixing the first member 10 and the second member 20.

　〈接合方法〉
　次に、第１部材１０、第２部材２０、及び第３部材３０を接合する接合方法について説明する。なお、以下の説明では、第１部材１０として軟鋼材、第１部材１０のメッキ層１５としてアルミニウムメッキ、第２部材２０としてアルミニウム材、溶加材である第３部材３０としてアルミニウム材を用いた場合について説明する。 <Joining method>
Next, a description will be given of a joining method for joining the first member 10, the second member 20, and the third member 30. In the following description, a case will be described in which mild steel material is used as the first member 10, aluminum plating is used as the plating layer 15 of the first member 10, aluminum material is used as the second member 20, and aluminum material is used as the third member 30, which is a filler metal.

　なお、第１部材１０のメッキ層１５としてアルミニウムメッキ、第２部材２０としてアルミニウム材、溶加材である第３部材３０としてアルミニウム材を用いた場合としたが、アルミニウムに代えて銅を用いても良い。具体的には、第１部材１０のメッキ層１５として銅メッキ、第２部材２０として銅材、溶加材である第３部材３０として銅材を用いた場合である。 In the above example, aluminum plating is used for the plating layer 15 of the first member 10, aluminum material is used for the second member 20, and aluminum material is used for the third member 30, which is the filler material; however, copper may be used instead of aluminum. Specifically, this is the case when copper plating is used for the plating layer 15 of the first member 10, copper material is used for the second member 20, and copper material is used for the third member 30, which is the filler material.

　図２に示すように、アーク溶接機１は、ノズル２と、チップ３と、を備える。ノズル２は、溶接対象物の溶接箇所にシールドガス等を供給する。チップ３は、溶加材としての第３部材３０に対して溶接電流を供給する。 As shown in FIG. 2, the arc welding machine 1 includes a nozzle 2 and a tip 3. The nozzle 2 supplies a shielding gas, etc., to the welding point of the workpiece. The tip 3 supplies a welding current to a third member 30, which serves as a filler metal.

　まず、第２部材２０の上面に、第１部材１０を重ね合わせて積層する。このとき、第２部材２０は、凹部２１の開口側の面が第１部材１０に当接するように配置される。このとき、第１部材１０の貫通部１１と、第２部材２０の凹部２１とを、積層方向から見て略同心状に配置する。 First, the first member 10 is stacked on top of the second member 20. At this time, the second member 20 is positioned so that the surface on the opening side of the recess 21 abuts the first member 10. At this time, the through-hole 11 of the first member 10 and the recess 21 of the second member 20 are positioned approximately concentrically when viewed from the stacking direction.

　アーク溶接機１は、第２部材２０と同種系の溶加材である第３部材３０を送給しながら溶接電流を供給することで、アーク５を発生させる。 The arc welding machine 1 generates an arc 5 by supplying a welding current while feeding a third member 30, which is a filler material of the same type as the second member 20.

　アーク溶接により溶融させた第３部材３０を、貫通部１１を介して凹部２１に充填する。凹部２１内では、溶融した第３部材３０が貫通部１１よりも外方に流れ出してフランジ状に広がる。 The third member 30, which has been melted by arc welding, is filled into the recess 21 through the through-hole 11. Within the recess 21, the molten third member 30 flows outward from the through-hole 11 and spreads outward in a flange shape.

　溶融した第３部材３０は、凹部２１内を埋め尽くした後、貫通部１１の内部に充填されて積層されていく。そして、溶融した第３部材３０は、貫通部１１内を埋め尽くした後、貫通部１１の周縁部よりも外方に流れ出してフランジ状に広がる。 After the molten third member 30 completely fills the recess 21, it is filled inside the through-hole 11 and laminated. Then, after the molten third member 30 completely fills the inside of the through-hole 11, it flows outward from the periphery of the through-hole 11 and spreads out in a flange shape.

　そして、溶融金属が凝固収縮することで、積層部３１と、積層部３１と一体に設けられた第１接合部３２と、積層部３１と一体に設けられた第２接合部３３と、を有する第３部材３０が形成される。 Then, as the molten metal solidifies and shrinks, a third member 30 is formed, which has a laminated portion 31, a first joint portion 32 formed integrally with the laminated portion 31, and a second joint portion 33 formed integrally with the laminated portion 31.

　第１接合部３２は、凹部２１内に充填されることで、第２部材２０に接合される。さらに、第１接合部３２は、第２部材２０の凹部２１内で貫通部１１よりも外方に張り出して、第１メッキ層１５ａにおける貫通部１１の周縁部に接合される。 The first bonding portion 32 is filled into the recess 21 and is bonded to the second member 20. Furthermore, the first bonding portion 32 protrudes outward beyond the through-hole 11 within the recess 21 of the second member 20 and is bonded to the peripheral edge of the through-hole 11 in the first plating layer 15a.

　第２接合部３３は、貫通部１１の周縁部よりも外方に張り出して、第２メッキ層１５ｂにおける貫通部１１の周縁部に接合される。 The second bonding portion 33 extends outward beyond the periphery of the through-hole 11 and is bonded to the periphery of the through-hole 11 in the second plating layer 15b.

　〈貫通部の内径と凹部の内径との関係〉
　以下、第１部材１０の貫通部１１の内径と、第２部材２０の凹部２１の内径と、の関係について、図３を用いて説明する。なお、溶加材としての第３部材３０のワイヤ径をφ１．２ｍｍとする。 <Relationship between the inner diameter of the through-hole and the inner diameter of the recess>
The relationship between the inner diameter of the through-hole 11 of the first member 10 and the inner diameter of the recess 21 of the second member 20 will be described below with reference to Fig. 3. The wire diameter of the third member 30 as a filler metal is set to φ1.2 mm.

　図３に示すように、第１部材１０の貫通部１１の内径がφ６ｍｍの場合、第２部材２０の凹部２１の内径をφ６～φ１０ｍｍの範囲で変更しても、溶融した第３部材３０が、第１部材１０の貫通部１１に十分に充填されない結果となった。図３では、溶加材の充填が不十分な溶接状態を「△」で示している。そのため、第１部材１０の貫通部１１の内径は、φ７ｍｍ以上であることが好ましい。 As shown in Figure 3, when the inner diameter of the penetration portion 11 of the first member 10 is φ6 mm, even when the inner diameter of the recess 21 of the second member 20 is changed within the range of φ6 to φ10 mm, the molten third member 30 does not sufficiently fill the penetration portion 11 of the first member 10. In Figure 3, a welding state in which the filler material is not sufficiently filled is indicated by a "△". Therefore, it is preferable that the inner diameter of the penetration portion 11 of the first member 10 be φ7 mm or more.

　また、第１部材１０の貫通部１１の内径がφ７ｍｍの場合に、第２部材２０の凹部２１の内径をφ７ｍｍに設定すると、第３部材３０の第１接合部３２及び第２接合部３３は、貫通部１１の周縁部に沿って径方向外方に張り出さない結果となった。図３では、第２接合部３３が貫通部１１の周縁部よりも径方向外方に張り出さない溶接状態を「×」で示している。また、第２接合部３３が貫通部１１の周縁部よりも径方向外方に張り出した溶接状態を「○」で示している。 Furthermore, when the inner diameter of the through-hole 11 of the first member 10 is φ7 mm and the inner diameter of the recess 21 of the second member 20 is set to φ7 mm, the first joint 32 and the second joint 33 of the third member 30 do not protrude radially outward along the periphery of the through-hole 11. In Figure 3, a welding state in which the second joint 33 does not protrude radially outward beyond the periphery of the through-hole 11 is indicated by an "x". Furthermore, a welding state in which the second joint 33 protrudes radially outward beyond the periphery of the through-hole 11 is indicated by an "o".

　ここで、第１部材１０の貫通部１１の内径がφ８ｍｍの場合に、第２部材２０の凹部２１の内径をφ７ｍｍ又はφ８ｍｍに設定すると、溶接状態が「×」になる。一方、第２部材２０の凹部２１の内径をφ９ｍｍ又はφ１０ｍｍに設定すると、溶接状態が「○」となる。 Here, if the inner diameter of the through-hole 11 of the first member 10 is φ8 mm and the inner diameter of the recess 21 of the second member 20 is set to φ7 mm or φ8 mm, the welding condition will be "X". On the other hand, if the inner diameter of the recess 21 of the second member 20 is set to φ9 mm or φ10 mm, the welding condition will be "O".

　また、第１部材１０の貫通部１１の内径がφ９ｍｍの場合、第２部材２０の凹部２１の内径をφ７～φ９ｍｍの範囲で変更すると、溶接状態が「×」になる。一方、第２部材２０の凹部２１の内径をφ１０ｍｍに設定すると、溶接状態が「○」となる。 Furthermore, when the inner diameter of the through-hole 11 of the first member 10 is φ9 mm, changing the inner diameter of the recess 21 of the second member 20 within the range of φ7 to φ9 mm results in an "X" weld condition. On the other hand, when the inner diameter of the recess 21 of the second member 20 is set to φ10 mm, the weld condition results in an "O" condition.

　つまり、第２部材２０の凹部２１の内径は、第１部材１０の貫通部１１の内径よりも大きくする必要がある。例えば、凹部２１の周縁と貫通部１１の周縁との間の距離は、少なくとも０．５ｍｍ以上であることが好ましい。 In other words, the inner diameter of the recess 21 in the second member 20 needs to be larger than the inner diameter of the through-hole 11 in the first member 10. For example, it is preferable that the distance between the periphery of the recess 21 and the periphery of the through-hole 11 be at least 0.5 mm or more.

　このように、貫通部１１の内径と、第２部材２０における凹部２１の内径と、を適切に設定することで、溶融した第３部材３０を凹部２１内に十分に充填することができる。これにより、適切な形状の第１接合部３２及び第２接合部３３を形成することができる。 In this way, by appropriately setting the inner diameter of the through-hole 11 and the inner diameter of the recess 21 in the second member 20, the molten third member 30 can be sufficiently filled into the recess 21. This makes it possible to form the first joint 32 and the second joint 33 with appropriate shapes.

　－本実施形態の効果－
　以上のように、本実施形態に係る接合構造によれば、第１部材１０、第２部材２０、及び第３部材３０のそれぞれの重ね合わせ部分において、金属材と異種材とが重なり合う部分を無くすことで、電食が発生するのを抑え、接合強度を確保することができる。 --Effects of this embodiment--
As described above, according to the joining structure of this embodiment, by eliminating the overlapping portions of the metal material and the dissimilar material at the overlapping portions of the first member 10, the second member 20, and the third member 30, it is possible to suppress the occurrence of electrolytic corrosion and ensure the joining strength.

　また、第１接合部３２と第２接合部３３とによって、第１部材１０と第２部材２０とを圧縮固定することで、第１部材１０及び第２部材２０の重ね合わせ部分を密着させて、外部から水分が侵入し難くなる。 Furthermore, by compressing and fixing the first member 10 and the second member 20 together using the first joint 32 and the second joint 33, the overlapping portions of the first member 10 and the second member 20 are tightly attached, making it difficult for moisture to penetrate from the outside.

　ここで、貫通部１１の内周面にメッキ層１５が設けられておらず、第１部材１０が貫通部１１から露出している場合、貫通部１１内に配置された積層部３１は、第１部材１０に接触している。また、第３部材３０が凝固する際の第１部材１０と第３部材３０との熱収縮スピードの違いや、経時変化に起因して、積層部３１にクラックが生じるおそれがある。そして、貫通部１１と積層部３１との隙間に水分が侵入すると、金属間化合物が生成されるおそれがある。 Here, if the plating layer 15 is not provided on the inner surface of the through-hole 11 and the first member 10 is exposed from the through-hole 11, the laminated portion 31 arranged inside the through-hole 11 will be in contact with the first member 10. Furthermore, cracks may occur in the laminated portion 31 due to differences in the thermal contraction speed between the first member 10 and the third member 30 when the third member 30 solidifies, or due to changes over time. Furthermore, if moisture penetrates into the gap between the through-hole 11 and the laminated portion 31, intermetallic compounds may be formed.

　これに対し、本実施形態では、第１接合部３２を第１メッキ層１５ａに接合し、第２接合部３３を第２メッキ層１５ｂに接合することで、貫通部１１の内周面に向かって外部から水分が侵入するのを抑えることができる。これにより、第１部材１０における貫通部１１の内周面で電食が発生するのを抑え、接合強度を確保することができる。 In contrast, in this embodiment, by joining the first bonding portion 32 to the first plating layer 15a and the second bonding portion 33 to the second plating layer 15b, it is possible to prevent moisture from penetrating from the outside toward the inner surface of the through portion 11. This prevents electrolytic corrosion from occurring on the inner surface of the through portion 11 of the first member 10, and ensures sufficient bonding strength.

　また、溶融した第３部材３０を貫通部１１から凹部２１に向かって流入させた際に、第３部材３０が貫通部１１よりも外側に広がることで、第３部材３０の第１接合部３２を第１メッキ層１５ａに接合し易くなる。また、幅の広い第１接合部３２を形成することができる。 Furthermore, when the molten third member 30 is caused to flow from the through-hole 11 toward the recess 21, the third member 30 spreads outward beyond the through-hole 11, making it easier to bond the first bonding portion 32 of the third member 30 to the first plating layer 15a. It is also possible to form a wide first bonding portion 32.

　また、同じ材質同士で溶融接合させることで、一般的によく使われる接着剤やシール剤、シーリング剤などの異なる工法を使用せずに、外部からの水分などの侵入を抑制し、電食を抑制することができる。 Furthermore, by melt-joining the same materials together, it is possible to prevent the intrusion of moisture from the outside and to prevent electrolytic corrosion without using different construction methods such as commonly used adhesives, sealants, and sealing agents.

　《実施形態２》
　以下、前記実施形態１と同じ部分については同じ符号を付し、相違点についてのみ説明する。 Second Embodiment
Hereinafter, the same parts as those in the first embodiment will be denoted by the same reference numerals, and only the differences will be described.

　図４に示すように、第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、凹部２１の底部に向かって傾斜した傾斜部２５を有する。凹部２１の開口幅は、貫通部１１の内径よりも大きい。 As shown in FIG. 4, the second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11. The recess 21 has an inclined portion 25 that slopes toward the bottom of the recess 21. The opening width of the recess 21 is larger than the inner diameter of the through-hole 11.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、凹部２１の傾斜部２５に沿って流れ、第２部材２０に接合される。凹部２１の内部では、溶融した第３部材３０が貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 flows along the inclined portion 25 of the recess 21 and is joined to the second member 20. Inside the recess 21, the molten third member 30 spreads so that it protrudes radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、凹部２１に傾斜部２５を設けることで、溶融した第３部材３０を凹部２１の底部に向かって流れ易くすることができる。 As described above, with the joining structure according to this embodiment, the provision of the inclined portion 25 in the recess 21 makes it easier for the molten third member 30 to flow toward the bottom of the recess 21.

　《実施形態３》
　図５に示すように、第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、積層方向から見て円形状に形成された段差部２６と、段差部２６から凹部２１の底部に向かって傾斜した傾斜部２５と、を有する。凹部２１の開口幅は、貫通部１１の内径よりも大きい。 Third Embodiment
5 , the second member 20 is provided with a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11. The recess 21 has a step portion 26 formed in a circular shape when viewed from the stacking direction, and an inclined portion 25 inclined from the step portion 26 toward the bottom of the recess 21. The opening width of the recess 21 is larger than the inner diameter of the through-hole 11.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、凹部２１の傾斜部２５に沿って流れ、第２部材２０に接合される。凹部２１の内部では、溶融した第３部材３０が傾斜部２５及び段差部２６を埋め尽くすことで、貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 flows along the inclined portion 25 of the recess 21 and is joined to the second member 20. Inside the recess 21, the molten third member 30 fills the inclined portion 25 and the stepped portion 26, spreading radially outward beyond the through portion 11, and the first joining portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、凹部２１に傾斜部２５及び段差部２６を設けることで、凹部２１の底部が平坦面のみである場合に比べて、第３部材３０の接合面積を増やすことができる。 As described above, with the joining structure according to this embodiment, by providing the recess 21 with the inclined portion 25 and the stepped portion 26, the joining area of the third member 30 can be increased compared to when the bottom of the recess 21 is only a flat surface.

　《実施形態４》
　図６に示すように、第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、積層方向から見て円形状に形成された段差部２６と、凹部２１の底部に設けられた平坦部２７と、段差部２６から平坦部２７に向かって傾斜した傾斜部２５と、を有する。凹部２１の開口幅は、貫通部１１の内径よりも大きい。 Fourth Embodiment
6 , the second member 20 is provided with a recess 21 recessed in the stacking direction at a position corresponding to the through portion 11. The recess 21 has a step portion 26 formed in a circular shape when viewed from the stacking direction, a flat portion 27 provided at the bottom of the recess 21, and an inclined portion 25 inclined from the step portion 26 toward the flat portion 27. The opening width of the recess 21 is larger than the inner diameter of the through portion 11.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、凹部２１の傾斜部２５に沿って平坦部２７に向かって流れ、第２部材２０に接合される。凹部２１の内部では、溶融した第３部材３０が、傾斜部２５、段差部２６、及び平坦部２７を埋め尽くすことで、貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 flows along the inclined portion 25 of the recess 21 toward the flat portion 27 and is joined to the second member 20. Inside the recess 21, the molten third member 30 fills the inclined portion 25, the stepped portion 26, and the flat portion 27, spreading radially outward beyond the through portion 11, and the first joining portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、凹部２１に傾斜部２５、段差部２６、及び平坦部２７を設けることで、凹部２１の底部が平坦面のみである場合に比べて、第３部材３０の接合面積を増やすことができる。 As described above, with the joining structure according to this embodiment, by providing the recess 21 with the inclined portion 25, the stepped portion 26, and the flat portion 27, the joining area of the third member 30 can be increased compared to when the bottom of the recess 21 is only a flat surface.

　《実施形態５》
　図７に示すように、第１部材１０は、貫通部１１を有する。貫通部１１は、第２部材２０に向かって先細となるテーパー部１２を有する。テーパー部１２のテーパー角度は、例えば、３０°～１２０°の範囲で設定するのが好ましい。 Fifth Embodiment
7, the first member 10 has a through portion 11. The through portion 11 has a tapered portion 12 that tapers toward the second member 20. The taper angle of the tapered portion 12 is preferably set in the range of 30° to 120°, for example.

　第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、積層方向から見て円形状に形成される。凹部２１の開口幅は、貫通部１１における第２部材２０側の内径よりも大きい。 The second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11. The recess 21 is formed in a circular shape when viewed in the stacking direction. The opening width of the recess 21 is larger than the inner diameter of the through-hole 11 on the second member 20 side.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、貫通部１１のテーパー部１２に沿って、貫通部１１の中央部に集まるように流れる。 The third member 30 is melted by arc welding. The molten third member 30 flows along the tapered portion 12 of the penetration portion 11, gathering at the center of the penetration portion 11.

　以上のように、本実施形態に係る接合構造によれば、溶融した第３部材３０が貫通部１１の中央部に向かって流れ易くなる。また、第２接合部３３の幅が大きくなることで、第２メッキ層１５ｂとの接合面積を増やし、接合強度を確保することができる。 As described above, the joining structure according to this embodiment allows the molten third member 30 to easily flow toward the center of the penetration portion 11. Furthermore, by increasing the width of the second joining portion 33, the joining area with the second plating layer 15b can be increased, ensuring sufficient joining strength.

　《実施形態６》
　図８に示すように、第１部材１０は、貫通部１１を有する。貫通部１１は、第２部材２０とは反対側に向かって先細となるテーパー部１２を有する。テーパー部１２のテーパー角度は、例えば、３０°～１２０°の範囲で設定するのが好ましい。 Sixth Embodiment
8, the first member 10 has a through portion 11. The through portion 11 has a tapered portion 12 that tapers toward the side opposite to the second member 20. The taper angle of the tapered portion 12 is preferably set in the range of 30° to 120°, for example.

　第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、積層方向から見て円形状に形成される。凹部２１の開口幅は、貫通部１１における第２部材２０側の内径よりも大きい。 The second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11. The recess 21 is formed in a circular shape when viewed in the stacking direction. The opening width of the recess 21 is larger than the inner diameter of the through-hole 11 on the second member 20 side.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、凹部２１に充填され、第２部材２０に接合される。溶融した第３部材３０は、凹部２１の内部を埋め尽くすことで、貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 fills the recess 21 and is joined to the second member 20. By filling the interior of the recess 21, the molten third member 30 spreads so as to protrude radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、溶融した第３部材３０を、貫通部１１のテーパー部１２に沿って凹部２１の隅部まで流すことができる。また、第１接合部３２の幅が大きくなることで、第２部材２０との接合面積を増やし、接合強度を確保することができる。 As described above, the joining structure according to this embodiment allows the molten third member 30 to flow along the tapered portion 12 of the through portion 11 to the corners of the recess 21. Furthermore, by increasing the width of the first joining portion 32, the joining area with the second member 20 is increased, ensuring sufficient joining strength.

　また、この接合構造では、例えば、図８に示す第１部材１０及び第２部材２０の配置を９０°回転させた場合、つまり、縦向きの姿勢に配置された第１部材１０及び第２部材２０に対してアーク溶接を横向きに行う場合に、貫通部１１に充填された溶融した第３部材３０が外部に垂れにくくなるという効果を得ることができる。 Furthermore, with this joining structure, for example, when the arrangement of the first member 10 and the second member 20 shown in Figure 8 is rotated 90°, that is, when arc welding is performed horizontally on the first member 10 and the second member 20 that are arranged vertically, the molten third member 30 filled in the penetration portion 11 is less likely to drip to the outside.

　《実施形態７》
　図９に示すように、第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、第２部材２０の一部を、第１部材１０とは反対側に膨出するようにプレス加工することで形成される。凹部２１の開口幅は、貫通部１１における第２部材２０側の内径よりも大きい。 Seventh Embodiment
9 , the second member 20 is provided with a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11. The recess 21 is formed by pressing a part of the second member 20 so that it bulges out on the side opposite to the first member 10. The opening width of the recess 21 is larger than the inner diameter of the through-hole 11 on the second member 20 side.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、凹部２１に充填され、第２部材２０に接合される。溶融した第３部材３０は、凹部２１の内部を埋め尽くすことで、貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 fills the recess 21 and is joined to the second member 20. By filling the interior of the recess 21, the molten third member 30 spreads so as to protrude radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、第２部材２０の板厚を一定とした状態で、第２部材２０に凹部２１を設けることができ、第２部材２０の剛性を確保することができる。 As described above, with the joining structure according to this embodiment, it is possible to provide a recess 21 in the second member 20 while maintaining a constant plate thickness of the second member 20, thereby ensuring the rigidity of the second member 20.

　《実施形態８》
　図１０に示すように、第１部材１０は、貫通部１１を有する。貫通部１１の周縁部分は、積層方向に屈曲した形状に形成される。図１０に示す例では、貫通部１１の周縁部分は、第２部材２０とは反対側（図１０では上側）に向かって凸状に屈曲している。図１０では、貫通部１１の周縁部分を、第１部材１０の下面に対して４５°屈曲させた形状としているが、例えば、１５°～６０°の範囲で屈曲させた形状としてもよい。 Eighth Embodiment
As shown in Fig. 10 , the first member 10 has a through-hole 11. The peripheral portion of the through-hole 11 is formed in a shape that is bent in the stacking direction. In the example shown in Fig. 10 , the peripheral portion of the through-hole 11 is bent in a convex shape toward the side opposite the second member 20 (the upper side in Fig. 10 ). In Fig. 10 , the peripheral portion of the through-hole 11 is bent at 45 degrees with respect to the lower surface of the first member 10, but it may also be bent at an angle in the range of 15 degrees to 60 degrees, for example.

　ここで、例えば、プレス加工で貫通部１１を形成することで、貫通部１１の周縁部分を屈曲させた形状とすることができる。また、例えば、ドリルを用いた穴開け加工で貫通部１１を形成することで、貫通部１１の周縁に発生したバリ等によって、貫通部１１の周縁部分を屈曲させた形状とすることができる。 Here, for example, by forming the through-hole 11 by press working, the peripheral edge of the through-hole 11 can be given a bent shape. Also, for example, by forming the through-hole 11 by drilling using a drill, burrs or the like that occur on the peripheral edge of the through-hole 11 can be used to give the peripheral edge of the through-hole 11 a bent shape.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、第１部材１０における貫通部１１の周縁の屈曲部分と第２部材２０とで仕切られた空間に充填され、第２部材２０に接合される。溶融した第３部材３０は、第１部材１０における貫通部１１の周縁の屈曲部分と第２部材２０とで仕切られた空間を埋め尽くすことで、貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 fills the space partitioned between the bent portion around the periphery of the through portion 11 in the first member 10 and the second member 20, and is joined to the second member 20. By filling the space partitioned between the bent portion around the periphery of the through portion 11 in the first member 10 and the second member 20, the molten third member 30 spreads outward in the radial direction beyond the through portion 11, and the first joint portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、貫通部１１の周縁部分を屈曲させることで、第３部材３０とメッキ層１５との接合面積を増やすことができる。 As described above, with the joining structure according to this embodiment, the peripheral edge of the through-hole 11 is bent, thereby increasing the joining area between the third member 30 and the plating layer 15.

　《実施形態９》
　図１１に示すように、第１部材１０は、貫通部１１を有する。貫通部１１の周縁部分は、積層方向に屈曲した形状に形成される。図１１に示す例では、貫通部１１の周縁部分は、第２部材２０とは反対側（図１１では上側）に向かって凸状に屈曲している。図１１では、貫通部１１の周縁部分を、第１部材１０の下面に対して９０°屈曲させた形状としている。 Ninth Embodiment
As shown in Fig. 11 , the first member 10 has a through-hole 11. The peripheral portion of the through-hole 11 is formed in a shape that is bent in the stacking direction. In the example shown in Fig. 11 , the peripheral portion of the through-hole 11 is bent in a convex shape toward the side opposite the second member 20 (the upper side in Fig. 11 ). In Fig. 11 , the peripheral portion of the through-hole 11 is bent at 90° with respect to the lower surface of the first member 10.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、第１部材１０における貫通部１１の周縁の屈曲部分と第２部材２０とで仕切られた空間に充填され、第２部材２０に接合される。溶融した第３部材３０は、第１部材１０における貫通部１１の周縁の屈曲部分と第２部材２０とで仕切られた空間を埋め尽くすことで、貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 fills the space partitioned between the bent portion around the periphery of the through portion 11 in the first member 10 and the second member 20, and is joined to the second member 20. By filling the space partitioned between the bent portion around the periphery of the through portion 11 in the first member 10 and the second member 20, the molten third member 30 spreads outward in the radial direction beyond the through portion 11, and the first joint portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、貫通部１１の周縁部分を屈曲させることで、第３部材３０とメッキ層１５との接合面積を増やすことができる。 As described above, with the joining structure according to this embodiment, the peripheral edge of the through-hole 11 is bent, thereby increasing the joining area between the third member 30 and the plating layer 15.

　《実施形態１０》
　図１２に示すように、第１部材１０は、貫通部１１を有する。貫通部１１の周縁部分は、積層方向に屈曲した形状に形成される。図１２に示す例では、貫通部１１の周縁部分は、第２部材２０に対向する側（図１２では下側）に向かって凸状に屈曲している。図１２では、貫通部１１の周縁部分を、第１部材１０の上面に対して４５°屈曲させた形状としているが、例えば、１５°～６０°の範囲で屈曲させた形状としてもよい。 Tenth Embodiment
As shown in Fig. 12 , the first member 10 has a through-hole 11. The peripheral portion of the through-hole 11 is formed in a shape that is bent in the stacking direction. In the example shown in Fig. 12 , the peripheral portion of the through-hole 11 is bent in a convex shape toward the side facing the second member 20 (the lower side in Fig. 12 ). In Fig. 12 , the peripheral portion of the through-hole 11 is bent at 45 degrees with respect to the upper surface of the first member 10, but it may also be bent at an angle in the range of 15 degrees to 60 degrees, for example.

　第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、積層方向から見て円形状に形成される。凹部２１には、第１部材１０における貫通部１１の周縁の屈曲部分の一部が収容される。凹部２１の開口幅は、貫通部１１の内径よりも大きい。 The second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11. The recess 21 is formed in a circular shape when viewed in the stacking direction. The recess 21 accommodates a portion of the curved portion of the periphery of the through-hole 11 in the first member 10. The opening width of the recess 21 is larger than the inner diameter of the through-hole 11.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、凹部２１に充填され、第２部材２０に接合される。凹部２１の内部では、溶融した第３部材３０が貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 fills the recess 21 and is joined to the second member 20. Inside the recess 21, the molten third member 30 spreads so as to protrude radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、貫通部１１の周縁部分を屈曲させることで、第３部材３０とメッキ層１５との接合面積を増やすことができる。 As described above, with the joining structure according to this embodiment, the peripheral edge of the through-hole 11 is bent, thereby increasing the joining area between the third member 30 and the plating layer 15.

　《実施形態１１》
　図１３に示すように、第１部材１０は、貫通部１１を有する。貫通部１１の周縁部分は、積層方向に屈曲した形状に形成される。図１３に示す例では、貫通部１１の周縁部分は、第２部材２０に対向する側（図１３では下側）に向かって凸状に屈曲している。図１３では、貫通部１１の周縁部分を、第１部材１０の上面に対して９０°屈曲させた形状としている。 Eleventh Embodiment
As shown in Fig. 13 , the first member 10 has a through-hole 11. The peripheral portion of the through-hole 11 is formed in a shape that is bent in the stacking direction. In the example shown in Fig. 13 , the peripheral portion of the through-hole 11 is bent in a convex shape toward the side facing the second member 20 (the lower side in Fig. 13 ). In Fig. 13 , the peripheral portion of the through-hole 11 is bent at 90° with respect to the upper surface of the first member 10.

　第２部材２０には、貫通部１１に対応する位置で積層方向に窪む凹部２１が設けられる。凹部２１は、積層方向から見て円形状に形成される。凹部２１には、第１部材１０における貫通部１１の周縁の屈曲部分の一部が収容される。凹部２１の開口幅は、貫通部１１の内径よりも大きい。 The second member 20 has a recess 21 recessed in the stacking direction at a position corresponding to the through-hole 11. The recess 21 is formed in a circular shape when viewed in the stacking direction. The recess 21 accommodates a portion of the curved portion of the periphery of the through-hole 11 in the first member 10. The opening width of the recess 21 is larger than the inner diameter of the through-hole 11.

　第３部材３０は、アーク溶接により溶融する。溶融した第３部材３０は、凹部２１に充填され、第２部材２０に接合される。凹部２１の内部では、溶融した第３部材３０が貫通部１１よりも径方向外方に張り出すように広がり、第１接合部３２が第１メッキ層１５ａに接合される。 The third member 30 is melted by arc welding. The molten third member 30 fills the recess 21 and is joined to the second member 20. Inside the recess 21, the molten third member 30 spreads so as to protrude radially outward beyond the through-hole 11, and the first joining portion 32 is joined to the first plating layer 15a.

　さらに、溶融した第３部材３０は、貫通部１１内を埋め尽くすことで、第１部材１０の上面にフランジ状に広がり、第２接合部３３が第２メッキ層１５ｂに接合される。 Furthermore, the molten third member 30 fills the entire through-hole 11, spreading out in a flange shape onto the upper surface of the first member 10, and the second bonding portion 33 is bonded to the second plating layer 15b.

　以上のように、本実施形態に係る接合構造によれば、貫通部１１の周縁部分を屈曲させることで、第３部材３０とメッキ層１５との接合面積を増やすことができる。 As described above, with the joining structure according to this embodiment, the peripheral edge of the through-hole 11 is bent, thereby increasing the joining area between the third member 30 and the plating layer 15.

　《その他の実施形態》
　前記実施形態については、以下のような構成としてもよい。 Other Embodiments
The above embodiment may be configured as follows.

　本実施形態では、第１部材１０の貫通部１１を円形状の貫通孔として、アーク溶接時には、溶接個所としての溶接点を停止させた状態で、貫通部１１に向かって溶加材として第３部材３０を送給するようにしたが、この形態に限定するものではない。 In this embodiment, the penetration portion 11 of the first member 10 is a circular through-hole, and during arc welding, the third member 30 is fed as a filler material toward the penetration portion 11 while the welding point as the welding location is stopped, but this is not limited to this form.

　例えば、図１４に示すように、第１部材１０の貫通部１１を長方形状の貫通孔として、アーク溶接時には、貫通部１１の長手方向の一端から他端に向かって溶接点を移動させながら、貫通部１１に向かって溶加材としての第３部材３０を送給するようにしてもよい。 For example, as shown in Figure 14, the penetration portion 11 of the first member 10 may be a rectangular through-hole, and during arc welding, the welding point may be moved from one end of the penetration portion 11 to the other end in the longitudinal direction while the third member 30 is fed as a filler material toward the penetration portion 11.

　ここで、貫通部１１における短辺の長さは、７ｍｍ以上とするのが好ましい。これにより、溶加材としての第３部材３０を貫通部１１から挿入し易くなる。また、第２部材２０と第３部材３０との接合面積を増やし、接合強度を確保することができる。 Here, it is preferable that the length of the short side of the through-hole 11 be 7 mm or more. This makes it easier to insert the third member 30, which serves as a filler material, through the through-hole 11. It also increases the bonding area between the second member 20 and the third member 30, ensuring bonding strength.

　以上説明したように、本発明は、第１部材、第２部材、及び第３部材のそれぞれの重ね合わせ部分において、電食が発生するのを抑えることができるという実用性の高い効果が得られることから、きわめて有用で産業上の利用可能性は高い。 As explained above, the present invention has the highly practical effect of suppressing the occurrence of electrolytic corrosion in the overlapping portions of the first, second, and third members, making it extremely useful and highly applicable industrially.

　１０　　第１部材
　１１　　貫通部
　１５　　メッキ層
　１５ａ　第１メッキ層
　１５ｂ　第２メッキ層
　２０　　第２部材
　２１　　凹部
　３０　　第３部材
　３１　　積層部
　３２　　第１接合部
　３３　　第２接合部 REFERENCE SIGNS LIST 10 First member 11 Penetration portion 15 Plated layer 15a First plated layer 15b Second plated layer 20 Second member 21 Recess 30 Third member 31 Laminated portion 32 First bonding portion 33 Second bonding portion

Claims (7)

　金属材で構成された第１部材と、前記第１部材に対して溶接が困難な材料で構成されて前記第１部材に積層された第２部材と、前記第２部材と同種系の溶加材で構成された第３部材と、が互いに接合された接合構造であって、
　前記第１部材の表面には、前記第２部材と同種系の材料で構成されたメッキ層が設けられ、
　前記メッキ層は、前記第１部材における前記第２部材に対向する面に設けられた第１メッキ層と、前記第１部材における前記第１メッキ層とは反対側の面に設けられた第２メッキ層と、を含み、
　前記第１部材には、積層方向に貫通する貫通部が設けられ、
　前記第３部材は、
　　前記貫通部の内部で凝固して積層方向に延びる積層部と、
　　前記積層部と一体に設けられ、前記第１メッキ層及び前記第２部材に接合された第１接合部と、
　　前記積層部と一体に設けられ、前記第２メッキ層に接合された第２接合部と、を有する
接合構造。 A joining structure in which a first member made of a metal material, a second member made of a material that is difficult to weld to the first member and laminated on the first member, and a third member made of a filler material of the same type as the second member are joined together,
a plating layer made of the same material as the second member is provided on a surface of the first member;
the plating layer includes a first plating layer provided on a surface of the first member facing the second member, and a second plating layer provided on a surface of the first member opposite to the first plating layer,
The first member is provided with a through-hole that penetrates in the stacking direction,
The third member is
a laminated portion solidified inside the through-hole and extending in the lamination direction;
a first bonding portion that is integral with the laminated portion and that is bonded to the first plating layer and the second member;
a second bonding portion that is integral with the laminated portion and bonded to the second plating layer. 　請求項１の接合構造において、
　前記第２部材には、前記貫通部に対応する位置で前記積層方向に窪む凹部が設けられ、
　前記凹部の周縁は、前記積層方向から見て、前記貫通部の周縁よりも外側に位置する
接合構造。 The joining structure of claim 1,
The second member is provided with a recess recessed in the stacking direction at a position corresponding to the through portion,
A joining structure in which the periphery of the recess is located outside the periphery of the through portion when viewed from the stacking direction. 　請求項２の接合構造において、
　前記凹部の周縁と前記貫通部の周縁との間の距離は、少なくとも０．５ｍｍ以上である
接合構造。 The joining structure of claim 2,
A joining structure in which the distance between the periphery of the recess and the periphery of the through-hole is at least 0.5 mm or more. 　請求項１～３の何れか１つの接合構造において、
　前記貫通部は、円形状に形成され、
　前記貫通部の孔径は、φ７ｍｍ以上である
接合構造。 In any one of the joining structures of claims 1 to 3,
The through-hole is formed in a circular shape,
A joining structure in which the hole diameter of the through portion is φ7 mm or more. 　請求項１～３の何れか１つの接合構造において、
　前記貫通部は、長方形状に形成され、
　前記貫通部における短辺の長さは、７ｍｍ以上である
接合構造。 In any one of the joining structures of claims 1 to 3,
The through-hole is formed in a rectangular shape,
A joining structure in which the length of the short side of the through portion is 7 mm or more. 　請求項１～３の何れか１つの接合構造において、
　前記第２部材及び前記メッキ層は、銅またはアルミニウムで構成される
接合構造。 In any one of the joining structures of claims 1 to 3,
The second member and the plating layer are made of copper or aluminum. 　請求項１～３の何れか１つの接合構造において、
　前記貫通部の周縁部分は、前記積層方向に屈曲した形状に形成される
接合構造。 In any one of the joining structures of claims 1 to 3,
A joining structure in which the peripheral portion of the through portion is formed in a shape that is bent in the stacking direction.
PCT/JP2025/002704 2024-02-01 2025-01-29 Joining structure Pending WO2025164641A1 (en)

Applications Claiming Priority (2)

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JP2024-014238 2024-02-01
JP2024014238 2024-02-01

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006159253A (en) * 2004-12-07 2006-06-22 Kobe Steel Ltd Weld joint of different material of iron-based material and aluminum-based material
US20150021379A1 (en) * 2013-07-16 2015-01-22 Illinois Tool Works Inc. Additive manufacturing system for joining and surface overlay
WO2022050182A1 (en) * 2020-09-01 2022-03-10 パナソニックＩｐマネジメント株式会社 Joint structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006159253A (en) * 2004-12-07 2006-06-22 Kobe Steel Ltd Weld joint of different material of iron-based material and aluminum-based material
US20150021379A1 (en) * 2013-07-16 2015-01-22 Illinois Tool Works Inc. Additive manufacturing system for joining and surface overlay
WO2022050182A1 (en) * 2020-09-01 2022-03-10 パナソニックＩｐマネジメント株式会社 Joint structure

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