JP2008168335A - Member joining method and structure - Google Patents

Abstract

A member joining method and structure suitable for reinforcing a shape member are provided.
An auxiliary member 7 is inserted into each of holes 9a and 9b formed in a first portion 8a and a second portion 8b of a main member 6, and a distal end portion thereof penetrates the second portion 8b and a proximal end portion The stopper 10 is inserted so as to abut on the first portion 8a. The welding tool 5 is pressed against the tip of the auxiliary member 7 while rotating, and the material of the auxiliary member 7 softened by frictional heat and plastic flow is deformed, while the hole 9a of the second location 8b is moved inward of the main member 6. After that, the joining tool 5 is pulled away from the main member 6, and the plastic flow site of the auxiliary member 7 sandwiching the second portion 8 b of the main member 6 is cured.
[Selection] Figure 1

Description

  The present invention relates to a member joining method and structure.

  Friction stir welding is a method for connecting members to be joined together without melting them (see, for example, Patent Document 1).

  In this technique, the object to be joined is placed on a support tool that is a backing member, and the material that has been softened by frictional heat and plastic flow is pressed against the object while rotating the joining tool. Agitate to assimilate.

  Next, the part to which the material is assimilated is cured by separating the joining tool from the object to be joined, and the members to be joined are joined to each other.

  The joining tool includes a columnar shoulder portion and a pin portion that is coaxial with the shoulder portion and projects toward the tip of the tool and has a smaller outer diameter than the shoulder portion.

In addition, there has already been proposed a method of manufacturing a structure by arranging two hollow extruded shapes made of an aluminum alloy and integrating the shapes by friction stir welding (see, for example, Patent Document 2). .
JP 2004-136365 A JP 2002-137071 A

  A shape member having a cross section in which two face plates are connected by ribs exhibits rigidity exceeding that of the simple substance due to the joint of the face plate and the ribs, but sometimes it is required to locally increase the rigidity of the shape member.

  In this case, it is conceivable to add a rib between the two face plates. However, since the rib exists over the entire length of the shape member, as a result, the weight of the shape member increases and the cost increases.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a member joining method and structure suitable for reinforcing a shape member.

  In order to achieve the above object, according to the first aspect of the present invention, the first member of the main member and the second member facing the second member are respectively formed so that the holes are opposed to each other, and the base end portions are formed in these holes. The auxiliary member having a stopper is inserted into the hole of the second part of the main member and the stopper is in contact with the first part, and pressed against the tip of the auxiliary member while rotating the joining tool, The second part of the main member is sandwiched in the member thickness direction with the material of the auxiliary member softened by frictional heat and plastic flow, and then the joining tool is pulled away from the main member to cure the plastic flow site of the auxiliary member.

  In the second aspect of the present invention, the main member in which holes facing each of the first part and the second part are formed, and the tip part enters the hole in the second part of the main member and An auxiliary member whose end portion is in a hole at the first location of the main member, and a stopper provided at the proximal end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location The tip portion of the auxiliary member is shaped so as to sandwich the second portion of the main member in the member thickness direction by frictional heat and plastic flow.

  In the invention according to claim 3, the main member in which the holes facing each of the first part and the second part are formed, and the tip part enters the hole of the second part of the main member and An auxiliary member whose end portion is in a hole at the first location of the main member, and a stopper provided at the proximal end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location And an additional member that is externally fitted to the auxiliary member and is sandwiched between the stopper and the first portion of the main member, and the tip portion of the auxiliary member is attached to the second portion of the main member by frictional heat and plastic flow. The configuration is shaped so as to be sandwiched in the thickness direction of the member.

  In the invention according to claim 4, the main member in which a hole facing each of the first part and the second part is formed, and the tip part enters the hole of the second part of the main member and An auxiliary member whose end portion is in a hole at the first location of the main member, and a stopper provided at the proximal end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location And an additional member that is fitted onto the auxiliary member and abuts against the second portion of the main member, and the tip portion of the auxiliary member is attached to the second portion of the main member by frictional heat and plastic flow. A configuration is adopted in which the members are sandwiched in the thickness direction of the members.

  According to the fifth aspect of the present invention, the main member in which holes facing each of the first part and the second part are formed, and the tip part enters the hole in the second part of the main member and An auxiliary member whose end portion is in a hole at the first location of the main member, and a stopper provided at the proximal end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location And an additional member that is fitted on the auxiliary member and abuts against the second portion of the main member, and the tip portion of the auxiliary member is formed with the member thickness at the second portion of the main member by frictional heat and plastic flow. It is shaped so as to be sandwiched in the direction, and the structure is assimilated to the additional member.

  According to the sixth aspect of the present invention, the main member in which the holes facing each of the first place and the second place are formed, and the tip portion enters the hole in the second place of the main member and An auxiliary member whose end portion enters a hole in the first portion of the main member, and a stopper provided at the proximal end portion of the auxiliary member so that the first portion of the main member can come into contact with the first portion from the opposite side of the second portion A first additional member that is externally fitted to the auxiliary member and sandwiched between the stopper and the first location of the main member; and a second additional member that is externally fitted to the auxiliary member and contacts the second location of the main member. An auxiliary member is provided, and the tip portion of the auxiliary member is shaped so as to sandwich the second portion of the main member and the second additional member in the member thickness direction by frictional heat and plastic flow.

  According to the seventh aspect of the present invention, the main member in which a hole facing each of the first portion and the second portion is formed, and the tip portion enters the hole in the second portion of the main member and An auxiliary member whose end portion is in a hole at the first location of the main member, and a stopper provided at the proximal end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location A first additional member that is externally fitted to the auxiliary member and sandwiched between the stopper and the first location of the main member; and a second additional member that is externally fitted to the auxiliary member and contacts the second location of the main member. An auxiliary member is provided, and the tip portion of the auxiliary member is shaped so as to sandwich the second portion of the main member in the member thickness direction by frictional heat and plastic flow, and is made assimilated to the second additional member.

  The invention according to claim 8 employs a configuration in which a mechanical element is provided on the stopper of the auxiliary member.

  According to the member joining method and structure of the present invention, the following excellent effects can be obtained.

  (1) In any of the inventions described in claims 1 to 8, the stopper of the auxiliary member is brought into contact with the first portion of the main member, and the tip portion of the auxiliary member is moved to the main portion by frictional heat and plastic flow. Since the second portion of the member is shaped so as to be sandwiched in the thickness direction of the member, the rigidity of the main member is locally increased, and an increase in the weight of the main member can be suppressed.

  (2) In any of the inventions according to claims 2 to 7, since the attachment of the additional member is completed simultaneously with the improvement of the rigidity of the main member, the member assembling step is reduced.

  (3) In the invention described in claim 8, since the attachment of the machine element is completed simultaneously with the improvement of the rigidity of the main member, the member assembling step is reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a first example of a member joining structure according to the present invention, in which a backing member 2 having a concave portion 1 and a short cylindrical pin portion 3 are coaxially connected to a tip surface of a cylindrical shoulder portion 4. A round bar-shaped auxiliary member 7 is joined to a main member 6 which is a hollow member having a rectangular cross section using a tool 5.

  The auxiliary member 7 has a flange-like stopper 10 at its base end portion, and the stopper 10 is provided with a screw shaft 11 as a machine element.

  Further, instead of the screw shaft 11, a mechanical element such as a screw hole or a pin-like protrusion may be provided in the stopper 10, or only the stopper 10 is provided when no mechanical element is required.

  The auxiliary member 7 is made of an aluminum alloy, and the main member 6, the backing member 2, and the joining tool 5 are made of steel that is harder and higher in softening temperature than the aluminum alloy.

  Holes 9a and 9b are formed in the first portion 8a of the main member 6 and the second portion 8b facing each other, and the stopper 10 is received by the backing member 2 so that the screw shaft 11 can be inserted into the recess 1. The main member 6 is disposed so that the tip 10 of the auxiliary member 7 enters the hole 9b of the second portion 8b, and the joining tool 5 is relative to the tip portion of the auxiliary member 7. (See FIG. 1A).

  The shape of the holes 9a and 9b may be a round hole drilled if the auxiliary member 7 is a round bar shape, and if the auxiliary member 7 is a square bar shape or a plate shape, a hole corresponding to that shape. 9a and 9b are drilled in the respective portions 8a and 8b by machining or the like.

  When the pin portion 3 is pressed against the tip of the auxiliary member 7 while rotating the welding tool 5, the pin portion 3 gradually sinks into this portion softened by frictional heat and plastic flow.

  Eventually, the end surface of the shoulder portion 4 of the welding tool 5 is pressed against the tip of the auxiliary member 7, and the material derived from the tip of the auxiliary member 7 softened by frictional heat and plastic flow passes through the hole 9b of the second location 8b. The main member 6 is pushed inward (see FIG. 1B).

  When the pin portion 3 of the rotating joining tool 5 is pressed against the tip portion of the round bar-shaped auxiliary member 7, the auxiliary member 7 may initially rotate in the circumferential direction.

  Although the rotation of the auxiliary member 7 is accommodated as the material is softened, a method of suppressing the rotation of the auxiliary member 7 using a mechanical means such as a clamp can also be adopted.

  Since the pressing force of the welding tool 5 is transmitted to the backing member 2 via the auxiliary member 7, the third portion 8 c or the fourth portion between the first portion 8 a and the second portion 8 b of the main member 6 is used. No buckling deformation occurs at the location 8d.

  Thereafter, the joining tool 5 is pulled away from the auxiliary member 7 to cure the plastic flow site of the auxiliary member 7 sandwiching the second portion 8b of the main member 6 around the hole 9b in the member thickness direction. Is removed from the backing member 2 (see FIG. 1C).

  That is, the stopper 10 of the auxiliary member 7 is brought into contact with the first portion 8a of the main member 6 and the second portion 8b of the main member 6 is sandwiched by the tip portion of the auxiliary member 7 plastically flowed. 6 is locally increased, and at the same time, the mounting of the screw shaft 11 is completed, so that the member assembling step is reduced.

  Further, the hole 13 in the tip portion of the auxiliary member 7 formed after the pin portion 3 of the joining tool 5 is recessed can be used for bolt fastening of another member if female threading is performed.

  FIG. 2 shows a second example of the member joining structure according to the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same parts.

  In this example, the additional member 14 is fitted on the proximal end portion of the auxiliary member 7, and the additional member 14 is sandwiched between the stopper 10 and the first portion 8 a of the main member 6.

  There is no restriction | limiting in particular in the raw material used for the additional member 14, Aluminum alloy, steel, or other things may be sufficient.

  The stopper 10 is received by the backing member 2 so that the screw shaft 11 enters the recess 1, the additional member 14 is externally fitted to the proximal end portion of the auxiliary member 7, the additional member 14 abuts on the first portion 8 a, and The main member 6 is arranged so that the tip end portion of the auxiliary member 7 enters the hole 9b of the second portion 8b, and the welding tool 5 is opposed to the tip portion of the auxiliary member 7, and the joining tool 5 is rotated while the pin is rotated. When the portion 3 is pressed against the tip of the auxiliary member 7, the pin portion 3 gradually sinks into this portion softened by frictional heat and plastic flow.

  Eventually, the end surface of the shoulder portion 4 of the welding tool 5 is pressed against the tip of the auxiliary member 7, and the material derived from the tip of the auxiliary member 7 softened by frictional heat and plastic flow passes through the hole 9b of the second location 8b. The main member 6 is pushed inward (see FIG. 2A).

  Thereafter, the joining tool 5 is pulled away from the auxiliary member 7 to cure the plastic flow site of the auxiliary member 7 sandwiching the second portion 8b of the main member 6 around the hole 9b in the member thickness direction. Is removed from the backing member 2 (see FIG. 2B).

  That is, the stopper 10 of the auxiliary member 7 is brought into contact with the first portion 8a of the main member 6 and the second portion 8b of the main member 6 is sandwiched by the tip portion of the auxiliary member 7 plastically flowed. 6 is locally increased, and at the same time, the mounting of the screw shaft 11 and the additional member 14 is completed, so that the member assembling step is reduced.

  Further, the hole 13 in the tip portion of the auxiliary member 7 formed after the pin portion 3 of the joining tool 5 is recessed can be used for bolt fastening of another member if female threading is performed.

  FIG. 3 shows a third example of the member joining structure according to the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same parts.

  In this example, the stopper 10 is received by the backing member 2 so that the screw shaft 11 enters the recess 1, the stopper 10 abuts on the first location 8a, and the tip of the auxiliary member 7 is inserted into the hole 9b of the second location 8b. The main member 6 is arranged so that the portion enters.

  Further, an additional member 15 made of steel is externally fitted to the distal end portion of the auxiliary member 7, the additional member 15 is placed on the second portion 8 b of the main member 6, and the joining tool 5 is placed on the distal end portion of the auxiliary member 7. When the pin portion 3 is pressed against the tip of the auxiliary member 7 while rotating the welding tool 5 relative to each other, the pin portion 3 gradually sinks into this portion softened by frictional heat and plastic flow.

  Eventually, the end surface of the shoulder portion 4 of the welding tool 5 is pressed against the tip of the auxiliary member 7, and the material derived from the tip of the auxiliary member 7 softened by frictional heat and plastic flow passes through the hole 9b of the second location 8b. The main member 6 is pushed inward (see FIG. 3A).

  Thereafter, the joining tool 5 is pulled away from the auxiliary member 7, and the additional member 15 is externally fitted to the auxiliary member 7, and the second portion 8b of the main member 6 is sandwiched around the hole 9b in the member thickness direction. The plastic flow site of the auxiliary member 7 is cured, and the base end portion of the auxiliary member 7 is removed from the backing member 2 (see FIG. 3B).

  That is, the stopper 10 of the auxiliary member 7 is brought into contact with the first portion 8a of the main member 6, and the second portion 8b of the main member 6 and the additional member 15 are sandwiched by the tip portion of the auxiliary member 7 plastically flowed. Therefore, the rigidity of the main member 6 is locally increased, and at the same time, the mounting of the screw shaft 11 and the additional member 15 is completed, so that the member assembling process is reduced.

  Further, the hole 13 in the tip portion of the auxiliary member 7 formed after the pin portion 3 of the joining tool 5 is recessed can be used for bolt fastening of another member if female threading is performed.

  FIG. 4 shows a fourth example of the member joining structure according to the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same parts.

  In this example, the stopper 10 is received by the backing member 2 so that the screw shaft 11 enters the recess 1, the stopper 10 abuts on the first location 8a, and the tip of the auxiliary member 7 is inserted into the hole 9b of the second location 8b. The main member 6 is arranged so that the portion enters.

  Further, an additional member 16 made of an aluminum alloy is externally fitted to the distal end portion of the auxiliary member 7, the additional member 16 is placed on the second portion 8 b of the main member 6, and the joining tool 5 is placed on the distal end of the auxiliary member 7. When the pin portion 3 is pressed against the tip of the auxiliary member 7 while rotating the welding tool 5 relative to the portion, the pin portion 3 gradually sinks into this portion softened by frictional heat and plastic flow.

  Eventually, the end surface of the shoulder portion 4 of the welding tool 5 is pressed against the tip of the auxiliary member 7 and the additional member 16, and the additional member 16 is also softened by frictional heat and plastic flow, and the periphery of the pin portion 3 of the welding tool 5. In addition, the assimilable layer 17 of the material derived from the proximal end portions of the additional member 16 and the auxiliary member 7 is softened (see FIG. 4A).

  Thereafter, the joining tool 5 is pulled away from the auxiliary member 7 and the additional member 16 to harden the assimilation layer 17 which is a plastic flow site (see FIG. 4B).

  That is, since the stopper 10 of the auxiliary member 7 is brought into contact with the first portion 8a of the main member 6 and the second portion 8b of the main member 6 is sandwiched by the assimilation layer 17, the rigidity of the main member 6 is locally increased. At the same time, since the mounting of the screw shaft 11 and the additional member 16 is completed, the member assembling process is reduced.

  Further, the hole 18 at the tip end portion of the auxiliary member 7 formed after the pin portion 3 of the joining tool 5 is fitted can be used for bolt fastening of another member if female threading is performed.

  FIG. 5 shows a fifth example of the member joining structure according to the present invention. In the figure, the same reference numerals as those in FIGS. 2 and 3 denote the same parts.

  In this example, the additional member 14 is sandwiched between the stopper 10 of the auxiliary member 7 and the first portion 8a of the main member 6, and the second portion 8b of the same main member 6 and another additional member 15 are plastically flowed. Since the auxiliary member 7 is sandwiched, the rigidity of the main member 6 is locally increased. At the same time, the mounting of the additional members 14 and 15 and the screw shaft 11 is completed, so that the member assembling process is reduced.

  FIG. 6 shows a sixth example of the member joining structure according to the present invention. In the figure, the same reference numerals as those in FIGS. 2 and 4 denote the same parts.

  In this example, the additional member 14 is sandwiched between the stopper 10 of the auxiliary member 7 and the first portion 8 a of the main member 6, and the second portion 8 b of the same main member 6 is connected to another additional member 16 and the auxiliary member 7. Since it is sandwiched between the derived anabolic layers 17, the rigidity of the main member 6 is locally increased, and at the same time, the mounting of the additional members 14, 16 and the screw shaft 11 is completed, so that the member assembling process is reduced.

  In addition, the member joining method and structure of the present invention are not limited to the above-described embodiments, but a simple columnar joining tool having no pin portion is used, and other points of the present invention. Of course, changes can be made without departing from the scope.

  The member joining method and structure of the present invention can be applied to various parts joining and assembling processes.

It is a conceptual diagram which shows the construction procedure of the 1st example of the member junction structure of this invention. It is a conceptual diagram which shows the construction procedure of the 2nd example of the member junction structure of this invention. It is a conceptual diagram which shows the construction procedure of the 3rd example of the member junction structure of this invention. It is a conceptual diagram which shows the construction procedure of the 4th example of the member junction structure of this invention. It is a conceptual diagram which shows the construction procedure of the 5th example of the member junction structure of this invention. It is a conceptual diagram which shows the construction procedure of the 6th example of the member junction structure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Joining tool 6 Main member 7 Auxiliary member 8a 1st location 8b 2nd location 9a Hole 9b Hole 10 Stopper 11 Screw shaft (machine element)
14 Additional member (first additional member)
15 Additional member (second additional member)
16 Additional member (second additional member)

Claims (8)

  An auxiliary member having a stopper at the base end portion is formed in each of the first portion of the main member and the second portion facing each other so as to face each other, and the distal end portion of the main member is the first portion of the main member. Inserted so that the stopper is in contact with the first location and inserted into the hole at the two locations, pressed against the tip of the auxiliary member while rotating the welding tool, the material of the auxiliary member softened by frictional heat and plastic flow A member joining method characterized in that the second portion is sandwiched in the member thickness direction, and thereafter the joining tool is pulled away from the main member to cure the plastic flow site of the auxiliary member.   A main member having holes facing each of the first portion and the second portion, a distal end portion of the main member in the second portion hole, and a proximal end portion of the first portion of the main member; An auxiliary member that enters the hole in the location, and a stopper provided at the proximal end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location, Is formed so as to sandwich the second portion of the main member in the member thickness direction by frictional heat and plastic flow.   A main member having holes facing each of the first portion and the second portion, a distal end portion of the main member in the second portion hole, and a proximal end portion of the first portion of the main member; An auxiliary member that has entered the hole in the location, a stopper provided at the base end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location, and an external fit to the auxiliary member And an additional member sandwiched between the stopper and the first portion of the main member, and the tip portion of the auxiliary member is shaped so as to sandwich the second portion of the main member in the member thickness direction by frictional heat and plastic flow. The member joining structure characterized by the above-mentioned.   A main member having holes facing each of the first portion and the second portion, a distal end portion of the main member in the second portion hole, and a proximal end portion of the first portion of the main member; An auxiliary member that has entered the hole in the location, a stopper provided at the base end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location, and an external fit to the auxiliary member And an additional member that abuts the second portion of the main member, and the tip portion of the auxiliary member is sandwiched between the second portion of the main member and the additional member in the member thickness direction by frictional heat and plastic flow. Member joining structure characterized by its shape.   A main member having holes facing each of the first portion and the second portion, a distal end portion of the main member in the second portion hole, and a proximal end portion of the first portion of the main member; An auxiliary member that has entered the hole in the location, a stopper provided at the base end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location, and an external fit to the auxiliary member And an additional member that abuts the second part of the main member, and the tip part of the auxiliary member is shaped so as to sandwich the second part of the main member in the member thickness direction by frictional heat and plastic flow, and the additional member A member joining structure characterized in that it is assimilated.   A main member having holes facing each of the first portion and the second portion, a distal end portion of the main member in the second portion hole, and a proximal end portion of the first portion of the main member; An auxiliary member that has entered the hole in the location, a stopper provided at the base end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location, and an external fit to the auxiliary member A first additional member sandwiched between the stopper and the first portion of the main member, and a second additional member that is fitted on the auxiliary member and contacts the second portion of the main member, A member joining structure characterized in that the tip portion is shaped so as to sandwich the second portion of the main member and the second additional member in the member thickness direction by frictional heat and plastic flow.   A main member having holes facing each of the first portion and the second portion, a distal end portion of the main member in the second portion hole, and a proximal end portion of the first portion of the main member; An auxiliary member that has entered the hole in the location, a stopper provided at the base end portion of the auxiliary member so as to be able to contact the first location of the main member from the opposite side of the second location, and an external fit to the auxiliary member A first additional member sandwiched between the stopper and the first portion of the main member, and a second additional member that is fitted on the auxiliary member and contacts the second portion of the main member, A member joining structure characterized in that the tip portion is shaped so as to sandwich the second portion of the main member in the member thickness direction by frictional heat and plastic flow, and assimilated to the second additional member.   The member joining structure according to claim 2, wherein a mechanical element is provided on a stopper of the auxiliary member.

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