WO2021246037A1 - Method and apparatus for manufacturing joined article - Google Patents

Abstract

A method for manufacturing a joined article, according to the present invention, comprising: a step for providing a first metal member comprising first and second openings; providing a second metal member 20 comprising first and second outer circumferential walls; a step for relatively moving the first and second metal members to bring either a first joint comprising a first inner circumferential wall and a first outer circumferential wall or a second joint comprising a second inner circumferential wall and a second outer circumferential wall into contact, and open the other joint to a prescribed spacing; a step for starting the flow of electricity between the first and seconds metal members; a step for bringing the inner circumferential wall and the outer circumferential wall of the other joint into contact; and a step for joining the first joint and the second joint through relative movement and the flow of electricity.

Description

Manufacturing method and manufacturing equipment for joined articles

This disclosure relates to a manufacturing method and a manufacturing apparatus for a bonded article.

As a manufacturing method when manufacturing parts made by joining multiple metal parts such as clutch parts and differential gears of automobiles, it is generated by energizing while pressing the other member into the opening provided in one member. A so-called ring mash (registered trademark) bonding method (hereinafter, simply referred to as "ring mash bonding") is known in which both members are softened by the Joule heat and plastically flowed to perform solid-phase bonding. Compared with welding methods such as arc welding, this ring mash joining does not cause problems such as segregation of carbides due to melting of metal members and solidification cracking due to heat, and the time required for joining is short. There are features such as.

For example, Japanese Patent Application Publication No. 2004-017048 describes one object to be welded having a circular or square space and the other object to be welded having a shaft shape and being welded to this space. Is described by a method for manufacturing a bonded article, which is welded by the above-mentioned ring mash joining.

However, in the bonded article described in Japanese Patent Application Publication No. 2004-017048, since the bonded article has only one annular location, when bending stress in the thrust direction is generated in the bonded article, The stress may be concentrated on this one joint and damaged. Such bending stress is likely to occur when at least one of the objects to be welded is long, such as the other object to be welded of the joined article described in Japanese Patent Application Publication No. 2004-017048.

In view of the above-mentioned problems, it is an object of the present disclosure to provide a method and an apparatus for manufacturing a joined article, which can obtain a joined article having high strength against bending stress.

In order to achieve the above object, the method for manufacturing the bonded article 1 according to the first aspect of the present disclosure is, for example, from the first opening 12 and the first opening 12, as shown in FIGS. 1 to 5. With step S101 for providing a first metal member 10 having a second opening 13 having a large diameter; a first outer peripheral wall accessible to a first inner peripheral wall portion 14 surrounding the first opening 12. S101; The first metal member 10 and the second metal member 20 in the direction of inserting the second metal member 20 into the first opening 12 and the second opening 13 of the metal member 10. The first joint portion 4 composed of the first inner peripheral wall portion 14 and the first outer peripheral wall portion 24, the second inner peripheral wall portion 15, and the second outer peripheral wall portion are moved relative to each other. The inner peripheral wall portion of one of the second joint portions 5 composed of 25 is brought into contact with the outer peripheral wall portion, and the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion are brought into contact with each other. A step S103 of separating the metal members 10 at predetermined intervals; and a step 104 of starting energization between the first metal member 10 and the second metal member 20; the first metal member 10 and the second metal member 20. With step S105 in which the relative movement with 20 is continued and the inner peripheral wall portion of the other joint portion is brought into contact with the outer peripheral wall portion; the first joint portion is joined by the relative movement and the energization. And the step S106 of performing the joining of the second joining portion and;

With such a configuration, the two metal members are joined at two joint points, and the strength can be increased as compared with the one having only one joint point. In addition, when joining two joints in a series of steps, the displacement amount of both joints can be made different by positively changing the timing to start joining, and spatter (chili) from the metal member at the time of joining. ) Can be suppressed.

The method for producing the bonded article 1 according to the second aspect of the present disclosure is, for example, as shown in FIG. 4, in the method for producing the bonded article 1 according to the first aspect of the present disclosure, the bonding is solid-phase bonding. It is due to.

With this configuration, solid-phase bonding, that is, a bonding method that does not substantially involve melting of metal members, is adopted as the bonding method, so that the energy required for bonding is less than that of a well-known bonding method such as arc welding. can do.

The method for producing the bonded article 1 according to the third aspect of the present disclosure is, for example, as shown in FIGS. 4 and 6, in the method for producing the bonded article 1 according to the first or second aspect of the present disclosure. The lap allowances L1 and L4 of the joint portion of the above are larger than the lap allowances L2 and L3 of the other joint portion.

With this configuration, the wrapping allowance of one joint where the surfaces to be joined come into contact first and the joining is started is made larger than the lap allowance of the other joint where the joining is started later, so that each joint can be joined. The joint strength of the part can be adjusted. In addition, by making the wrap allowance of the other joint where the joint is started later relatively small, the Joule heat larger than necessary for the one joint where the joint is started first when this part is joined. It is also possible to suppress the occurrence of spatter due to the occurrence of spatter. Therefore, both joints in the manufactured joint article are in a good joint state.

The method for manufacturing the joined article 1 according to the fourth aspect of the present disclosure is, for example, as shown in FIG. 4, in the method for manufacturing the joined article 1 according to the first to third aspects of the present disclosure, one of the joint portions. Is located inside the other joint in a direction orthogonal to the insertion direction.

With this configuration, the so-called skin that occurs when the member is energized by arranging the other joint where the joint is started later than the one joint where the joint is started earlier. Utilizing the effect, when a current flows through both joints, more current can flow on the other joint side. Therefore, the temperature of the other joint can be raised to the softening temperature or higher in a short time, and the supply of excessive energy to one of the joints can be suppressed. , Both can be in a good joint state.

The manufacturing apparatus 30 for the bonded article 1 according to the fifth aspect of the present disclosure has, for example, as shown in FIG. 3, a first opening 12 and a second opening 13 having a diameter larger than that of the first opening 12. The first electrode 31 to which the first metal member 10 including the above is fixed; the first outer peripheral wall portion 24 that can contact the first inner peripheral wall portion 14 surrounding the first opening 12 and the said. With the second electrode 32 to which the second metal member 20 including the second outer peripheral wall portion 25 contactable with the second inner peripheral wall portion 15 surrounding the second opening 13 is fixed; The addition includes an energizing device 34 that supplies a current between the electrode 31 and the second electrode 32; and a pressurizing device 35 that relatively moves the first electrode 31 and the second electrode 32; The pressure device 35 has the first electrode 31 in the direction P in which the second metal member 20 is inserted into the first opening 12 and the second opening 13 of the first metal member 10. The first metal member 10 fixed to the first metal member 10 and the second metal member 20 fixed to the second electrode 32 are relatively moved to move the first inner peripheral wall portion 14 and the first outer periphery. The joint portion of any one of the first joint portion 4 including the wall portion 24, the second inner peripheral wall portion 15, and the second joint portion 5 composed of the second outer peripheral wall portion 25. The first state in which the inner peripheral wall portion and the outer peripheral wall portion are brought into contact with each other and the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion are separated at predetermined intervals, and the inner peripheral wall portion of the other joint portion. The first metal member 10 and the second metal member 20 are joined to each other through the second state in which the outer peripheral wall portion is brought into contact with the outer peripheral wall portion, and the energizing device 34 is in the first state. At the timing when, the current is supplied between the first metal member 10 fixed to the first electrode 31 and the second metal member 20 fixed to the second electrode 32. Is to start.

With such a configuration, the two metal members are joined at two joint points, and the strength can be increased as compared with the one having only one joint point. Further, when joining two joints in a series of steps, the displacement amount of both joints can be made different by positively changing the timing of starting the join, and spatter is generated from the metal member at the time of joining. It can be suppressed.

With the above-mentioned configuration, the joined article having high strength against bending stress can be obtained by the manufacturing method and the manufacturing apparatus of the joined article of the present disclosure.

1A and 1B are schematic explanatory views showing an example of a first metal member according to an embodiment of the present disclosure. FIG. 2 is a schematic cross-sectional view showing an example of a second metal member according to an embodiment of the present disclosure. FIG. 3 is a schematic view showing a state in which the first and second metal members are attached to an example of the manufacturing apparatus for the joined article according to the embodiment of the present disclosure. 4A to 4D are explanatory views schematically showing the states of the main parts of the first and second metal members in each step of the example of the manufacturing method of the bonded article according to the embodiment of the present disclosure. .. FIG. 5 is a flowchart showing an example of a method for manufacturing a bonded article according to an embodiment of the present disclosure. 6A to 6D are explanatory views schematically showing the states of the main parts of the first and second metal members in each step of the example of the method for manufacturing a bonded article according to another embodiment of the present disclosure. be. FIG. 7 is a flowchart showing an example of a method for manufacturing a joined article according to another embodiment of the present disclosure.

This application is based on Japanese Patent Application No. 2020-096249 filed on June 2, 2020 in Japan, the contents of which form part of the content of this application.
Also, the present invention will be more fully understood by the following detailed description. Further scope of application of the present application will be clarified by the following detailed description. However, detailed description and specific examples are preferred embodiments of the present invention and are provided only for purposes of explanation. From this detailed description, various changes and modifications will be apparent to those skilled in the art within the spirit and scope of the present invention.
The applicant has no intention of presenting any of the described embodiments to the public, and is equal to the disclosed modifications and alternatives that may not be literally included in the claims. It is a part of the invention under the argument.

Hereinafter, each embodiment for carrying out the present invention will be described with reference to the drawings. In the following, the scope necessary for the explanation for achieving the object of the present invention will be schematically shown, and the scope necessary for the explanation of the relevant part of the present invention will be mainly explained. It shall be based on known technology.

1A and 1B are schematic explanatory views showing a first metal member 10 according to an embodiment of the present disclosure, FIG. 1A is a schematic plan view, and FIG. 1B is a schematic cross section cut along the line AA of FIG. 1A. It is a figure. Further, FIG. 2 is a schematic cross-sectional view showing a second metal member 20 according to an embodiment of the present disclosure. In the method for manufacturing the joined article 1 according to the present embodiment, as shown in FIGS. 1 and 2, the joined article 1 is formed by ring-mashing the first metal member 10 and the second metal member 20. (See FIG. 3, etc.) may be manufactured. In the present embodiment, the clutch component will be illustrated as a joint article, the gear of the clutch component as the first metal member 10, and the shaft of the clutch component as the second metal member 20. The joined article 1 manufactured in the present embodiment is not limited to the clutch part, and can be applied to various parts formed by joining metal members such as a differential mechanism.

As shown in FIG. 1, the first metal member 10 may be a substantially disk-shaped gear member made of a metal material such as carbon steel, alloy steel, or cast iron. A circular opening 11 is formed in the central portion of the first metal member 10 so as to penetrate the disk-shaped first metal member 10 in the axial direction (thickness direction). The opening 11 is a hole into which a second metal member 20, which will be described later, is inserted, and the first opening 12 and the second opening 13 are coaxially arranged so as to be connected in the axial direction. To. That is, the opening 11 can be a circular through hole whose inner diameter changes on the way.

The first opening 12 is a columnar opening having a predetermined height having an inner diameter of d1 formed so as to extend in the axial direction from one surface 10A perpendicular to the axial direction of the first metal member 10. Can be. Further, the second opening 13 is formed so as to extend in the axial direction from the other surface 10B perpendicular to the axial direction of the first metal member 10, the inner diameter thereof is d2, and the height thereof is H1. It can be a columnar opening. The inner diameter d2 of the second opening 13 is larger than the inner diameter d1 of the first opening 12, and the end faces of the second opening 13 and the first opening 12 are connected to each other via the step portion 16. Communicate with each other. A chamfer 14C may be formed in a portion of the first inner peripheral wall portion 14 that defines the first opening 12 and is connected to the step portion 16, and a second opening 13 is defined. A chamfer 15C may also be formed on a portion of the inner peripheral wall portion 15 that is connected to the other surface 10B of the first metal member 10. As shown in FIG. 1, the chamfer 14C of the first inner peripheral wall portion 14 is larger than the chamfer 15C of the second inner peripheral wall portion 15. The opening 11 of the present embodiment is described as having a shape in which two openings 12 and 13 having a circular inner peripheral surface are coaxially connected, but the shapes of the openings 12 and 13 are circular. It is not limited, and may have, for example, a polygonal or elliptical inner peripheral surface. In that case, the shape of the second metal member 20, which will be described later, is also changed according to the shape of the opening 11.

As shown in FIG. 2, the second metal member 20 is a substantially solid round bar-shaped shaft member that is relatively long in the axial direction and is made of a metal material such as carbon steel, alloy steel, or cast iron. be able to. One end 20A of both ends 20A and 20B in the axial direction of the long second metal member 20 is a portion to be inserted into the opening 11 of the first metal member 10. One end portion 20A may be composed of a large diameter portion 23 and a small diameter portion 22 connected to the large diameter portion 23. The first metal member 10 and the second metal member 20 may be made of the same metal material or may be made of different metal materials.

The small diameter portion 22 may form a columnar protrusion having an outer diameter of D1 and a height of H2. Further, the large diameter portion 23 can be connected to the small diameter portion 22 via the step portion 26, and can be a columnar portion having an outer diameter of D2. The outer diameter D2 of the large diameter portion 23 is larger than the outer diameter D1 of the small diameter portion 22. A chamfer 24C may be formed on a portion of the first outer peripheral wall portion 24 that defines the small diameter portion 22 and is connected to the tip surface of one end portion 20A, and a second portion that defines the large diameter portion 23. A chamfer 25C may also be formed in a portion of the outer peripheral wall portion 25 that is connected to the step portion 26. As shown in FIG. 2, the chamfer 24C of the first outer peripheral wall portion 24 is larger than the chamfer 25C of the second outer peripheral wall portion 25. The height H2 of the small diameter portion 22 described above may be set to be longer than the height H1 of the second opening 13 of the first metal member 10. The relative lengths of these heights H1 and H2 may be set based on the joining start timing of each joining portion in the joining step described later. Further, the chamfers 14C, 15C, 24C, and 25C provided at various points of the first metal member 10 and the second metal member 20 come into contact with each other in the joining step described later, so that the chamfers 14C, 15C, 24C, and 25C are relative to each other. It functions to perform alignment.

FIG. 3 is a schematic view showing a state in which the first and second metal members 10 and 20 are attached to the manufacturing apparatus of the joined article 1 according to the embodiment of the present disclosure. As shown in FIG. 3, in the manufacturing apparatus 30 of the joined article 1 according to the present embodiment, the first electrode 31 to which the first metal member 10 is fixed and the second metal member 20 to which the second metal member 20 is fixed are fixed. The electrode 32 of 2 and the energizing device 34 for supplying an electric current between the first and second metal members 10 and 20 and the first and second metal members 10 and 20 are relatively close to each other. It can include at least a pressurizing device 35 for operating. Further, it is preferable that the manufacturing apparatus 30 of the joined article 1 is housed in a processing chamber (not shown) and the surrounding environment is adjusted.

The first electrode 31 may be made of a conductive material at least in part having an arbitrary fixing structure for fixing the first metal member 10. Similarly, the second electrode 32 may be at least partially made of a conductive material with an arbitrary fixing structure for fixing the second metal member 20. These first and second electrodes 31 and 32 are electrically connected to the energizing device 34 to form electrodes for supplying an electric current between the first and second metal members 10 and 20. There is. The first electrode 31 and the second electrode 32 shown in FIG. 3 are exemplified in that the first electrode 31 and the second electrode 32 are entirely made of a conductive material and function as an electrode, but to the metal members 10 and 20 to be fixed. As long as it can supply current, it may be partially composed of an insulator or the like.

The energizing device 34 converts, for example, an alternating current supplied from an external alternating current power supply 33 made of a commercial power supply or the like into a desired pulsed current, and switches the energization timing between both electrodes 31 and 32 to be controllable. It may include a device. By operating the energizing device 34 having such a configuration, between the first metal member 10 fixed to the first electrode 31 and the second metal member 20 fixed to the second electrode 32. A pulsed current can be supplied and the contact portions of both metal members can be resistance welded. The pulsed current supplied here is typically a single pulsed current. The pulsed current has a current peak value of, for example, tens of thousands to hundreds of thousands of amperes, and the pulse width is 10 milliseconds to 100 milliseconds. This pulsed current makes it possible to reliably join the two metal members. As a specific configuration of the energizing device 34, a switching circuit including a well-known inverter, a capacitor, or the like, a semiconductor switch, or the like can be adopted, but the present invention is not limited to this. For example, if the current required for joining the first metal member 10 and the second metal member 20 can be supplied between the first electrode 31 and the second electrode 32, it is well known. It may have the structure of. A detailed description of these structures will be omitted here.

The pressurizing device 35 is, for example, an operating mechanism that is connected to the second electrode 32 and operates the second metal member 20 fixed to the second electrode 32 together with the second electrode 32. A well-known pneumatic or hydraulic piston / cylinder mechanism can be adopted. By operating the pressurizing device 35, one end 20A of the second metal member 20 can be inserted into the opening 11 of the first metal member 10. The pressurizing device 35 of the present embodiment is an example of a device for relatively moving the first and second metal members 10 and 20, and the specific structure and the metal member to be operated are described above. Not limited to things.

When the bonded article 1 is manufactured by using the bonded article manufacturing apparatus 30 having the above-described configuration, for example, as shown in FIG. 3, the first metal member 10 is attached to the first electrode 31 and the second electrode 31 is used. The metal member 20 is fixed to the second electrode 32, respectively. Then, the pressurizing device 35 and the energizing device 34 are operated to perform ring mash joining. The manufactured joint article 1 includes a first joint portion 4 composed of a first inner peripheral wall portion 14 and a first outer peripheral wall portion 24, a second inner peripheral wall portion 15, and a second outer peripheral wall portion. It is formed by being joined at two points of the second joint portion 5 composed of 25. A series of joining steps will be described later.

Here, an outline of the ring mash joining adopted in the manufacturing method of the joining article 1 according to the present embodiment will be briefly described. As shown in Japanese Patent Application Publication No. 2004-017048, the ring mash joint is inserted into the inner peripheral wall portion of the opening of one metal member having an opening and the opening of one metal member. It refers to a joining method for joining the other metal member to the outer peripheral wall portion on the insertion side. In the metal member joined by ring mash joining, the outer diameter of the outer peripheral wall portion on the insertion side of the other metal member is formed to be slightly larger than the inner diameter of the inner peripheral wall portion of the opening of one metal member. As a result, an annular overlapping allowance (hereinafter, referred to as “wrap allowance”) having a predetermined length is formed between the inner peripheral surface and the outer peripheral surface. Then, by applying pressure in the direction of inserting the end portion of the other metal member into the opening of one metal member and energizing between the two metal members, the contact surface between the two metal members, that is, the inside of the one metal member. The peripheral wall portion and the outer peripheral wall portion of the other metal member are plastically flowed to form a joint portion. At this time, preferably, both metal members are heated below the melting point temperature and above the softening temperature by Joule heat generated by energization. As a result, so-called solid-phase bonding is performed in which the surfaces to be bonded of both metal members (although they may be temporarily or partially melted) are bonded to each other without substantially melting. It is a thing. In such a ring mash junction, the supplied current is a pulsed current, and the supply time is shorter than that of arc welding, which supplies a large current over a relatively long period of time. There is an advantage that the amount of energy required for joining is relatively small.

Since the ring mash joint described above is also adopted in this embodiment, as shown in FIGS. 1, 2 and 4A described later, the first inner peripheral wall portion 14 of the first metal member 10 The inner diameter d1 is slightly smaller than the outer diameter D1 of the first outer peripheral wall portion 24 of the second metal member 20. And this portion defines the lap allowance L1 in the first joint portion 4. Similarly, the inner diameter d2 of the second inner peripheral wall portion 15 of the first metal member 10 is slightly smaller than the outer diameter D2 of the second outer peripheral wall portion 25 of the second metal member 20. This portion defines the lap allowance L2 at the second joint portion 5. The lengths of these wrap allowances L1 and L2 can be, for example, 0.1 to 0.5 mm. However, in the present embodiment, the lap allowance L1 of the first joint portion 4 is set to be larger than the lap allowance L2 of the second joint portion 5.

FIG. 4 is an explanatory diagram schematically showing the states of the main parts of the first and second metal members in each step of the method for manufacturing a joined article according to the embodiment of the present disclosure. Further, FIG. 5 is a flowchart showing a method of manufacturing a joined article according to an embodiment of the present disclosure. Hereinafter, the method for manufacturing the bonded article according to the present embodiment will be described mainly with reference to FIGS. 4 and 5. In this method, first, in step S101, as shown in FIG. 4A, the first metal member 10 and the second metal member 20 constituting the joined article 1 are provided. As for the details of the first metal member 10 and the second metal member 20 provided here, those already described with reference to FIGS. 1 and 2, etc. can be adopted. The provided first metal member 10 and the second metal member 20 are attached to or supported by the first electrode 31 and the second electrode 32 of the manufacturing apparatus 30 shown in FIG. 3, respectively.

Next, in step S102, the pressurizing device 35 is operated, and one end portion 20A of the second metal member 20 fixed to the second electrode 32 is inside the opening 11 of the first metal member 10. The movement in the direction of insertion into the metal (direction of arrow P shown in FIG. 4B) is started. This movement continues until the end of a series of joining steps.

The movement described above continues, and the first inner peripheral wall portion 14 of the first metal member 10 constituting the first joint portion 4 and the first outer peripheral wall portion 24 of the second metal member 20 come into contact with each other. In the state of 1 (Yes in step S103), as shown in FIG. 4B, the first metal member 10 and the second metal member 20 are the chamfer 14C of the first inner peripheral wall portion 14 and the first. When the chamfer 24C of the outer peripheral wall portion 24 comes into contact with the chamfer 24C, the state is electrically connected. Therefore, in step S104, the energizing device 34 connected to the AC power supply 33 is then operated to supply a pulsed current between the first electrode 31 and the second electrode 32. Due to this energization, the current E shown in FIG. 4B flows through the chamfered 14C and 24C portions that abut between the first metal member 10 and the second metal member 20.

At the time of this step S104, the first inner peripheral wall portion 14 constituting the first joint portion 4 and the first outer peripheral wall portion 24 are in contact with each other, while the second joint portion 5 is formed. It is particularly noteworthy that the inner peripheral wall portion 15 and the second outer peripheral wall portion 25 are separated by a predetermined distance G1. As a result, at this point, Joule heat is generated due to the pressurization and current by the pressurizing device 35 only in the portion constituting the first joint portion 4, and the joint of the second joint portion 5 is not started. The reason why the joining timings of the two joining points are intentionally changed in this way is that if the joining timings of the first joining portion 4 and the second joining portion 5 are started at the same time, the two joining points are naturally the same. Since the position, contact area, etc. are different, the energy generated at each joint (per unit volume) is not uniform, and there is a possibility that spatter (dust) may occur at the joint to which more energy is supplied. Because there is. In the present disclosure, for the purpose of suppressing the occurrence of such spatter, the joining timings of the two joining portions are intentionally different, and the amount of energy supplied mainly to both joining portions is adjusted. The distance G1 of the gap between the second inner peripheral wall portion 15 and the second outer peripheral wall portion 25 can be, for example, about 0.5 to 1.5 mm.

In relation to the adjustment of the energy supplied to the joint portion described above, the wrap allowance L1 of the first joint portion 4 according to the present embodiment may be made larger than the lap allowance L2 of the second joint portion 5. preferable. This is because the portion of the first joint portion 4 where the joining is started first is a portion that guarantees the strength of the joint portion in the joined article 1, so that high joining strength is required, while the joining is started later. This is because the portion of the second joint portion 5 is intended to reinforce the strength when bending stress in the thrust direction is generated, so that the required joint strength is relatively low. In addition, if the wrap allowance L2 of the second joint portion 5 is made larger than necessary (for example, to the same extent as the lap allowance L1 of the first joint portion 4), a large pressing force or energization is applied to the joint of this portion. This is also because an amount is required, and at the time of joining the portion, more Joule heat than necessary is generated on the side of the first joining portion 4 where the joining is started first, and there is a possibility that spattering may occur.

Returning to the description of FIG. 5, when the energization between the electrodes is started in step S104 and the movement of the second metal member 20 by the pressurizing device 35 is continued, the first metal member 10 is the first. Since the small diameter portion 22 of the second metal member 20 is pressed into the opening 12 of 1 and a pulsed current is supplied between the two metal members, the first inner peripheral wall portion 14 The pressing force and the current are concentrated on the contact surface of the first outer peripheral wall portion 24. Then, this contact surface and its vicinity are softened by being heated by Joule heat generated by the supplied current, and the bonding between the solid phase surfaces proceeds while both contact surfaces are plastically flowed by the pressing force. At this time, the energizing device 34 controls the current value so that the Joule heat generated by the current heats the first metal member 10 and the second metal member 20 to a temperature equal to or higher than the softening temperature and lower than the melting point temperature. Then, it is preferable.

Further, while the joining of the first joining portion 4 is progressing in this way, the movement of the pressurizing device 35 is continued, and in step S105, the second inner peripheral wall portions 15 and the second inner peripheral wall portion 15 of the first metal member 10 When the second outer peripheral wall portion 25 of the metal member 20 comes into contact with the second outer peripheral wall portion 25, as shown in FIG. 4C, the contact portion between the second inner peripheral wall portion 15 and the second outer peripheral wall portion 25, in detail. The current E also flows through the contact surface between the chamfer 15C of the second inner peripheral wall portion 15 and the chamfer 25C of the second outer peripheral wall portion 25.

In this step S105, the second inner peripheral wall portion 15 and the second outer peripheral wall portion 25 constituting the second joint portion 5 form the first inner peripheral wall portion 14 and the first joint portion 4. It is a matter of particular note that the portion 1 is located outside the outer peripheral wall portion 24. It is generally known that when an alternating current is supplied to a member, the current density on the outside of the member tends to be higher than the current density on the inside of the member (so-called skin effect). Therefore, as in the present embodiment, by arranging the joint portion where the joint is started later on the outside, when the current is supplied in a state where both the first and second joint portions 4 and 5 are in contact with each other, the current is supplied. A large amount of current flows to the second junction 5 side, and a relatively large amount of energy can be supplied to the second junction 5 side. In this way, if energy can be smoothly supplied to the joint portion where the joint is started later, the joint state of the first joint portion 4 and the second joint portion 5 after the series of joining steps are completed. It becomes easy to match with the joint state, and spatter that tends to occur on the first joint portion 4 side can be effectively suppressed.

As described above, the second metal member by the pressurizing device 35 is in a state where a current is flowing through the contact surface between the chamfer 15C of the second inner peripheral wall portion 15 and the chamfer 25C of the second outer peripheral wall portion 25. When the movement of the 20 is continued, the large diameter portion 23 of the second metal member 20 is pressed so as to be pushed into the second opening 13 of the first metal member 10, so that the second metal member 20 is second. The pressing force and the current are also supplied to the contact surface between the inner peripheral wall portion 15 and the second outer peripheral wall portion 25. Therefore, this contact surface and its vicinity are also softened by being heated by the Joule heat generated by the supplied current, and plastically flowed by the pressing force, similarly to the contact surface of the first joint portion 4 and its vicinity. Bonding between solid surface planes progresses.

In a state where the first joint portion 4 and the second joint portion 5 described above have been joined, the movement by the pressurizing device 35 further progresses, and the length of the joint portion in the insertion direction of each of the joint portions 4 and 5 ( When h1 and h2 (also referred to as the joining length) reach a desired length, it is determined that the joining of both joining portions 4 and 5 is completed (Yes in step S106), and a series of joining steps is completed. In the method for manufacturing the joined article 1 according to the present embodiment, the joining length of each of the joining portions 4 and 5 that completes the joining can be set to a relatively short length. Specifically, for example, the joint length h1 of the first joint portion 4 can be 2.5 to 3.5 mm, and the joint length h2 of the second joint portion 5 can be 1.0 to 2.0 mm. This is because the joined article 1 manufactured through the above-mentioned joining step has two joining points, so that the joining length of each joining point does not have to be long in order to improve the strength thereof. Is. Therefore, in the method for manufacturing the joined article 1 according to the present embodiment, the joining work can be realized in a short time and with energy saving. Further, the difference length between the two joint lengths h1 and h2 is equal to the difference between the height H1 of the second opening 13 and the height H2 of the small diameter portion 22. Therefore, it is possible to adjust the joint lengths h1 and h2 by adjusting these heights H1 and H2.

As described above, in the manufacturing method and manufacturing apparatus for the joined article according to the present embodiment, the metal members are joined at the two joining points of the first and second joining portions 4 and 5, and thus the metal members are joined. It becomes possible to manufacture a bonded article having higher strength against bending stress than in the case where there is only one location.

In addition, in the present embodiment, as described above, the first and second joint portions 4 and 5 are joined by adjusting the size of the wrap allowances L1 and L2 and the position of the second joint portion 5. At that time, the joint strength required for each joint and the amount of energy supplied to each joint are adjusted. Therefore, the joining state of both joining portions 4 and 5 at the end of a series of joining steps can be made into a good state by simple adjustment.

<Other embodiments>
In the above-described embodiment, the case where the first joint portion 4 is started first and then the second joint portion 5 is started as the order of starting the joints has been described, but the present disclosure is limited to this. Not done. Therefore, as another embodiment of the present disclosure, an embodiment in which the order of starting joining is changed will be described below. In the other embodiments shown below, the basic configuration of the joined article 1'is the same as that of the joined article 1 described in the above-described embodiment. Therefore, for the configuration common to that of one embodiment, the same reference numerals with dashes are used, the specific description thereof is omitted, and only different configurations are described.

FIG. 6 is an explanatory diagram schematically showing the states of the main parts of the first and second metal members in each step of the method for manufacturing a joined article according to another embodiment of the present disclosure. Further, FIG. 7 is a flowchart showing a method for manufacturing a joined article according to another embodiment of the present disclosure. In the joined article 1'according to the present embodiment, as shown in FIG. 6, the height H3 of the second opening 13'is set longer than the height H4 of the small diameter portion 22', and the second opening is set to be longer than the height H4. It is the same as the above-mentioned joint article 1 except that the lap allowance L3 of the joint portion 4'of 1 is set smaller than the lap allowance L4 of the second joint portion 5'. In the present embodiment, as described above, the height H3 of the second opening 13'is longer than the height H4 of the small diameter portion 22', so that the second opening located on the outer side when the joining step is executed. The joint 5'will come into contact before the first joint 4'located inside.

The method of manufacturing the joined article according to the present embodiment will be described below mainly with reference to FIGS. 6 and 7. First, in step S101, as shown in FIG. 6A, a first metal member 10'and a second metal member 20' constituting the bonded article 1 are provided. Next, in step S102, the pressurizing device 35 is operated to start the movement of the second metal member 20'fixed to the second electrode 32.

The above-mentioned movement continues, and as shown in FIG. 6B, the second inner peripheral wall portion 15'and the second metal member 20'of the first metal member 10'constituting the second joint portion 5'. When the first state of contact with the outer peripheral wall portion 25'of 2 is reached (Yes in step S103A), then in step S104, the energizing device 34 connected to the AC power supply 33 is operated to operate the first electrode 31. A pulsed current is supplied between the and the second electrode 32. By this energization, the current E shown in FIG. 6B flows through the chamfered 15'C and 25'C portions that abut between the first metal member 10'and the second metal member 20'. At the time of this step S104, the chamfer 15'C of the second inner peripheral wall portion 15'consisting of the second joint portion 5'and the second outer peripheral wall portion 25' are in contact with each other, but the first one. The first inner peripheral wall portion 14'that constitutes the joint portion 4'and the first outer peripheral wall portion 24'are in a state of being separated by a predetermined distance G2. As a result, at this point, Joule heat is generated due to the pressurization by the pressurizing device 35 and the current supplied from the energizing device 34 only in the portion constituting the second joint portion 5', and the first joint portion 4'. Joining is not started. The distance G2 of the gap between the first inner peripheral wall portion 14'and the first outer peripheral wall portion 24'can be, for example, about 0.5 to 1.5 mm, similarly to the above-mentioned distance G1. ..

When the energization between the electrodes is started in step S104 and the movement of the second metal member 20'by the pressurizing device 35 is continued, the second opening 13'of the first metal member 10' Since the large diameter portion 23'of the second metal member 20'is pressed into the inside and a pulsed current is supplied between the two metal members, the second inner peripheral wall portion 15' This pressing force and current are concentrated on the contact surface of the second outer peripheral wall portion 25'. Then, the contact surface and its vicinity are softened by being heated by Joule heat generated by the supplied current, and the solid phase surfaces are bonded to each other while plastically flowing due to the pressing force. While the joining of the second joining portion 5'is progressing in this way, the movement of the pressurizing device 35 is continued, and in step S105A, the first inner peripheral wall portion 14'and the second inner peripheral wall portion 14'of the first metal member 10'. In the second state of contact with the first outer peripheral wall portion 24'of the metal member 20', as shown in FIG. 6C, the first inner peripheral wall portion 14'and the first outer peripheral wall portion 24' The current E also flows in the contact portion of.

A second by the pressurizing device 35, with a current flowing through the contact surface between the chamfer 14'C of the first inner peripheral wall portion 14'and the chamfer 24'C of the first outer peripheral wall portion 24'. When the movement of the metal member 20'is continued, the small diameter portion 22'of the second metal member 20'is pressed into the first opening 12' of the first metal member 10'. Therefore, this pressing force and the current are also supplied to the contact surfaces of the first inner peripheral wall portion 14'and the first outer peripheral wall portion 24'. Therefore, this contact surface and its vicinity are also softened by being heated by the Joule heat generated by the supplied current and plastically flowed by the pressing force, similarly to the contact surface of the second joint 5'and its vicinity. At the same time, the bonding between the solid surface surfaces progresses.

In a state where the above-mentioned first joint portion 4'and second joint portion 5'have been joined, the movement by the pressurizing device 35 further progresses, and the joint portions of the respective joint portions 4'and 5'in the insertion direction. When the lengths (joining lengths) h3 and h4 of the above reach a desired length, it is determined that the joining of both joining portions 4'and 5'has been completed (Yes in step S106), and a series of joining steps is completed. As the joining length of each joining portion for completing the joining, for example, the joining length h3 of the first joining portion 4'is 1.0 to 2.0 mm, and the joining length h4 of the second joining portion 5'is 2. It can be 5 to 3.5 mm.

Also in the other embodiments described above, since the metal members are joined to each other at the two joining points of the first and second joining portions 4'and 5', compared with the case where there is only one joining point. It becomes possible to manufacture a bonded article having high strength against bending stress. Further, by adjusting the lap allowances L3 and L4 of both joints 4'and 5', the joint strength required for each of the joints 4'and 5'can be adjusted, so that a series of joining steps can be performed. The joint state of both joint portions 4'and 5'when finished can be made into a good state by simple adjustment.

Further, in the above-mentioned two embodiments, the lap allowances L1 and L3 of the first joint portions 4 and 4'and the lap allowances L2 and L4 of the second joint portions 5 and 5'are made to have different sizes. Although it is set, it is possible to make both laps the same size. Further, in each of the above-described embodiments, the case where solid-phase welding, specifically ring mash bonding, is adopted as the bonding method has been described, but instead of this, another bonding method such as resistance welding accompanied by melting is used. It is also possible to adopt it.

The present disclosure is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. And all of them are included in the technical idea of the present invention.

All documents, including publications, patent applications and patents cited herein, are individually specifically shown, referenced and incorporated, and all of their content is described herein. To the same extent, refer to and incorporate here.

The use of nouns and similar directives used in connection with the description of the invention (especially in the context of the following claims) is not particularly pointed out herein or clearly inconsistent with the context. , Singular and plural. The phrases "prepare," "have," "include," and "include" are to be interpreted as open-ended terms (ie, meaning "including, but not limited to," unless otherwise noted). The description of the numerical range herein is intended solely to serve as an abbreviation for individually referring to each value within that range, unless otherwise noted herein. Each value is incorporated herein as if it were individually listed herein. All methods described herein can be performed in any suitable order, as long as they are not specifically pointed out herein or are clearly inconsistent with the context. All examples or exemplary phrases used herein (eg, "etc.") are intended solely to better illustrate the invention and set limits to the scope of the invention, unless otherwise stated. is not it. Nothing in the specification shall be construed as indicating an element not described in the claims as essential to the practice of the present invention.

In the present specification, preferred embodiments of the present invention are described, including the best embodiments known to the present inventor for carrying out the present invention. For those skilled in the art, reading the above description will reveal variations of these preferred embodiments. The inventor expects an expert to apply such modifications as appropriate, and intends to implement the invention by methods other than those specifically described herein. .. Accordingly, the invention includes all amendments and equivalents of the content of the claims attached herein, as permitted by applicable law. Moreover, any combination of the above elements in all modifications is included in the invention unless specifically pointed out herein or is clearly inconsistent with the context.

Claims (6)

A step of providing a first metal member having a first opening and a second opening having a diameter larger than that of the first opening;
A first outer peripheral wall portion that can contact the first inner peripheral wall portion that surrounds the first opening, and a second outer peripheral wall portion that can contact the second inner peripheral wall portion that surrounds the second opening. And the process of providing a second metal member comprising;
The first metal member and the second metal member are relative to each other in the direction in which the second metal member is inserted into the first opening and the second opening of the first metal member. A second joint composed of the first inner peripheral wall portion, the first outer peripheral wall portion, the second inner peripheral wall portion, and the second outer peripheral wall portion, which are moved. A step of bringing the inner peripheral wall portion of one of the joints into contact with the outer peripheral wall portion and separating the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion at predetermined intervals;
A step of initiating energization between the first metal member and the second metal member;
A step of continuing the relative movement between the first metal member and the second metal member and bringing the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion into contact with each other;
A step of performing a solid-phase bonding of the first bonding portion and a solid-phase bonding of the second bonding portion by the relative movement and the energization;
A method for manufacturing a bonded article. A step of providing a first metal member having a first opening and a second opening having a diameter larger than that of the first opening;
A first outer peripheral wall portion that can contact the first inner peripheral wall portion that surrounds the first opening, and a second outer peripheral wall portion that can contact the second inner peripheral wall portion that surrounds the second opening. And the process of providing a second metal member comprising;
The first metal member and the second metal member are relative to each other in the direction in which the second metal member is inserted into the first opening and the second opening of the first metal member. A second joint composed of the first inner peripheral wall portion, the first outer peripheral wall portion, the second inner peripheral wall portion, and the second outer peripheral wall portion, which are moved. A step of bringing the inner peripheral wall portion of one of the joints into contact with the outer peripheral wall portion and separating the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion at predetermined intervals;
A step of initiating energization between the first metal member and the second metal member;
A step of continuing the relative movement between the first metal member and the second metal member and bringing the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion into contact with each other;
A step of performing the joining of the first joint portion and the joining of the second joint portion by the relative movement and the energization;
The wrap allowance of the one joint is larger than the wrap allowance of the other joint.
A method for manufacturing a bonded article. A step of providing a first metal member having a first opening and a second opening having a diameter larger than that of the first opening;
A first outer peripheral wall portion that can contact the first inner peripheral wall portion that surrounds the first opening, and a second outer peripheral wall portion that can contact the second inner peripheral wall portion that surrounds the second opening. And the process of providing a second metal member comprising;
The first metal member and the second metal member are relative to each other in the direction in which the second metal member is inserted into the first opening and the second opening of the first metal member. A second joint composed of the first inner peripheral wall portion, the first outer peripheral wall portion, the second inner peripheral wall portion, and the second outer peripheral wall portion, which are moved. A step of bringing the inner peripheral wall portion of one of the joints into contact with the outer peripheral wall portion and separating the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion at predetermined intervals;
A step of initiating energization between the first metal member and the second metal member;
A step of continuing the relative movement between the first metal member and the second metal member and bringing the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion into contact with each other;
A step of performing the joining of the first joint portion and the joining of the second joint portion by the relative movement and the energization;
The one joint is located inside the other joint in a direction orthogonal to the insertion direction.
A method for manufacturing a bonded article. With a first electrode to which a first metal member having a first opening and a second opening having a diameter larger than that of the first opening is fixed;
A first outer peripheral wall portion that can contact the first inner peripheral wall portion that surrounds the first opening, and a second outer peripheral wall portion that can contact the second inner peripheral wall portion that surrounds the second opening. With a second electrode to which a second metal member is fixed;
With an energizing device that supplies an electric current between the first electrode and the second electrode;
A pressurizing device for relatively moving the first electrode and the second electrode;
The pressurizing device is fixed to the first electrode in the direction of inserting the second metal member into the first opening of the first metal member and the inside of the second opening. A first joint composed of the first inner peripheral wall portion and the first outer peripheral wall portion by relatively moving the first metal member and the second metal member fixed to the second electrode. The inner peripheral wall portion and the outer peripheral wall portion of one of the joint portions of the second joint portion including the portion, the second inner peripheral wall portion, and the second outer peripheral wall portion are brought into contact with each other and the other. A first state in which the inner peripheral wall portion and the outer peripheral wall portion of the joint portion are separated from each other at predetermined intervals, and a second state in which the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion are brought into contact with each other. The first metal member and the second metal member are joined to each other through the above.
The energizing device is between the first metal member fixed to the first electrode and the second metal member fixed to the second electrode at the timing when the first state is reached. Start supplying the current to
The relative movement and the current cause solid-phase bonding of the first junction and solid-phase bonding of the second junction.
Equipment for manufacturing bonded articles. With a first electrode to which a first metal member having a first opening and a second opening having a diameter larger than that of the first opening is fixed;
A first outer peripheral wall portion that can contact the first inner peripheral wall portion that surrounds the first opening, and a second outer peripheral wall portion that can contact the second inner peripheral wall portion that surrounds the second opening. With a second electrode to which a second metal member is fixed;
With an energizing device that supplies an electric current between the first electrode and the second electrode;
A pressurizing device for relatively moving the first electrode and the second electrode;
The pressurizing device is fixed to the first electrode in the direction of inserting the second metal member into the first opening of the first metal member and the inside of the second opening. A first joint composed of the first inner peripheral wall portion and the first outer peripheral wall portion by relatively moving the first metal member and the second metal member fixed to the second electrode. The inner peripheral wall portion and the outer peripheral wall portion of one of the joint portions of the second joint portion including the portion, the second inner peripheral wall portion, and the second outer peripheral wall portion are brought into contact with each other and the other. A first state in which the inner peripheral wall portion and the outer peripheral wall portion of the joint portion are separated from each other at predetermined intervals, and a second state in which the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion are brought into contact with each other. The first metal member and the second metal member are joined to each other through the above.
The energizing device is between the first metal member fixed to the first electrode and the second metal member fixed to the second electrode at the timing when the first state is reached. Start supplying the current to
The wrap allowance of the one joint is larger than the wrap allowance of the other joint.
Equipment for manufacturing bonded articles. With a first electrode to which a first metal member having a first opening and a second opening having a diameter larger than that of the first opening is fixed;
A first outer peripheral wall portion that can contact the first inner peripheral wall portion that surrounds the first opening, and a second outer peripheral wall portion that can contact the second inner peripheral wall portion that surrounds the second opening. With a second electrode to which a second metal member is fixed;
With an energizing device that supplies an electric current between the first electrode and the second electrode;
A pressurizing device for relatively moving the first electrode and the second electrode;
The pressurizing device is fixed to the first electrode in the direction of inserting the second metal member into the first opening of the first metal member and the inside of the second opening. A first joint composed of the first inner peripheral wall portion and the first outer peripheral wall portion by relatively moving the first metal member and the second metal member fixed to the second electrode. The inner peripheral wall portion and the outer peripheral wall portion of one of the joint portions of the second joint portion including the portion, the second inner peripheral wall portion, and the second outer peripheral wall portion are brought into contact with each other and the other. A first state in which the inner peripheral wall portion and the outer peripheral wall portion of the joint portion are separated from each other at predetermined intervals, and a second state in which the inner peripheral wall portion and the outer peripheral wall portion of the other joint portion are brought into contact with each other. The first metal member and the second metal member are joined to each other through the above.
The energizing device is between the first metal member fixed to the first electrode and the second metal member fixed to the second electrode at the timing when the first state is reached. Start supplying the current to
The one joint is located inside the other joint in a direction orthogonal to the insertion direction.
Equipment for manufacturing bonded articles.

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