JP2020189334A - Joint member manufacturing device and joint member manufacturing method - Google Patents

Abstract

To provide a joint member manufacturing device which suppresses a defect in a joint object component while maintaining joint accuracy, and a joint member manufacturing method.SOLUTION: A joint member manufacturing device 1 comprises: a first electrode 11; a second electrode 12; a current generator 15 which generates a current to be flown between the first electrode 11 and the second electrode 12 via a first component E and a second component D; a moving unit 16 which so moves the first electrode 11 and/or the second electrode 12 as to approach; and a stopper 13 which is located between the first electrode 11 with which the first component E has contacted and the second component D which has contacted the second electrode 12 or the second electrode 12 with which the second component D has contacted when the first component E and the second component D are joined. The stopper 13 is so formed as to contact the first electrode 11 and the second component D or the second electrode 12 when the first component E and the second component D have been joined in a prescribed manner, has an insulation part 13s, and has a prescribed Young's modulus.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joining member manufacturing apparatus and a manufacturing method of a joining member, and more particularly to a joining member manufacturing apparatus and a joining member manufacturing method for suppressing a defect in a member to be joined while maintaining the accuracy of joining.

For example, as a method for manufacturing a part in which a rod-shaped member such as a shaft is fitted in a central space of an annular (ring-shaped) member such as a drum such as a clutch part of an automobile, an annular metal part and a rod-shaped member are used. There is a ring mash (registered trademark) joining method in which a metal part is slightly overlapped and a current is applied while pressurizing the member, and the member is softened by Joule heat to achieve the joining (for example, Patent Document). See 1.). When performing such a joining method, when the member to be joined contains high carbon steel such as charcoal-hardened steel, a small region of a portion through which current flows and a peripheral portion thereof is rapidly heated, and then rapidly cooled in a natural state. If this is done, the hardness of the joint portion will increase, which will cause a decrease in mechanical strength and cracks. Therefore, there is a technique for reducing the hardness by tempering by energizing twice (for example, Patent Document 2). reference.).

Japanese Unexamined Patent Publication No. 2004-17048 Japanese Patent No. 5909014

When performing the ring mash (registered trademark) joining method, in order to improve the height and dimensional accuracy of the parts after joining, a stopper is used to stop the fitting when the member is fitted to the target depth. Is preferable. However, when the stopper is made of a metal material that is not easily deformed in order to improve the dimensional accuracy, the current for tempering is diverted between the member to be joined and the stopper, and a sufficient tempering effect can be obtained. In addition, the surface of the member to be joined that comes into contact with the electrode may be roughened or damaged.

In view of the above problems, it is an object of the present invention to provide a joining member manufacturing apparatus and a joining member manufacturing method that suppress the occurrence of defects in the members to be joined while maintaining the accuracy of joining.

In order to achieve the above object, the joining member manufacturing apparatus according to the first aspect of the present invention is formed of the first member E made of a metal material and the metal material, for example, as shown in FIG. An apparatus for manufacturing a joining member C (see, for example, FIG. 2C) in which a second member D is joined; with a first electrode 11 in contact with the first member E; and a second member D. A second electrode 12 that comes into contact with the first member E and a second member D between the first electrode 11 and the first member E when the first member E and the second member D are joined. With the second electrode 12 arranged to face the first electrode 11 so as to sandwich the first electrode 11; the first electrode 11 and the second electrode 12 via the first member E and the second member D. A current generator 15 that generates a current flowing between them; a moving device that moves at least one of the first electrode 11 and the second electrode 12 so as to bring the distance between the first electrode 11 and the second electrode 12 closer. 16; When the first member E and the second member D are joined, the first electrode 11 that the first member E comes into contact with and the second member D that comes into contact with the second electrode 12 Alternatively, a second electrode 12 (see, for example, FIG. 5) with which the second member D is in contact is provided with a stopper 13 arranged between the second electrode 12; the stopper 13 is provided with the first member E and the second member D. Is formed so as to be in contact with the first electrode 11 and the second member D or the second electrode 12 when joined in a predetermined manner, has an insulating portion 13s, and is predetermined. It is made of a material having a Young ratio of; a predetermined Young ratio is between the first electrode 11 and the second electrode 12 via the joined first member E and the second member D. The smaller of the rate of increase in stress of the first member E in the portion in contact with the first electrode 11 and the rate of increase in stress of the second member D in the portion in contact with the second electrode 12 when an electric current is passed through the second electrode 12. The rate of increase in the stress of the stopper 13 at the portion in contact with the first electrode 11 and the rate of increase in the stress of the stopper 13 at the portion in contact with the second member D or the second electrode 12 are smaller than those of the other. ..

With this configuration, by providing a stopper having an insulating portion, the stopper has a predetermined Young's modulus while maintaining the joining accuracy while preventing current from flowing from the first electrode to the second electrode via the stopper. Therefore, the rate of change in stress at the contact portion when the first member is pressurized by the first electrode can be made larger than the rate of change in stress at the contact portion between the first electrode and the stopper. Therefore, it is possible to prevent the surface of the first member in contact with the first electrode from becoming rough. When referring to the first member and the second member, each member may be a synthetic member composed of a plurality of constituent members. The Young's modulus of the synthetic member is referred to as the Young's modulus. The synthetic Young's ratio for a surface for which roughness is desired to be suppressed is a combination of the displacement in the normal direction of the surface that occurs when a force is applied in the normal direction of the surface (typically, the direction of movement of the surface). It is a proportional constant between the (apparent) strain divided by the length of the member and the stress in the normal direction of the constituent member. The synthetic Young's modulus can be calculated based on the Young's modulus, cross-sectional area, and length of each component. When calculating the synthetic Young's modulus, the first electrode and / or the second electrode can also be one of the constituent members. The synthetic Young's modulus is usually different from the Young's modulus of a component having a surface (surface in contact with an electrode) for which roughness is desired to be suppressed. When the other member (stopper) is a synthetic member, the synthetic Young's modulus is similarly defined for the surface to be compared.

Further, the joining member manufacturing apparatus according to the second aspect of the present invention shows, for example, with reference to FIG. 1, in the joining member manufacturing apparatus 1 according to the first aspect of the present invention, the predetermined Young's modulus is determined. Within the range of the length of the stopper 13 in the direction in which at least one of the first electrode 11 and the second electrode 12 is moved by the moving device 16, the first electrode 11, the first member E, and the second member D, The Young's modulus of the second electrode 12 that exists within the length range of the stopper 13 is smaller than the synthetic Young's modulus.

With this configuration, the rate of increase in stress of the stopper can be reduced when the same strain occurs in both members and both electrodes and the stopper in this range with reference to the length of the stopper.

Further, as shown in the joining member manufacturing apparatus according to the third aspect of the present invention with reference to FIG. 1, for example, in the joining member manufacturing apparatus 1 according to the second aspect of the present invention, the predetermined Young's modulus is determined. The ratio to the synthetic Young's modulus is a value of 0.1 to 0.8.

With this configuration, it is possible to secure the force applied to the portion where the first electrode and the first member are in contact with each other, and it is possible to prevent the surface of the first member in contact with the first electrode from being roughened. ..

Further, the joining member manufacturing apparatus according to the fourth aspect of the present invention is, for example, as shown with reference to FIG. 1, the joining member according to any one of the first to third aspects of the present invention. In the manufacturing apparatus 1, the Young's modulus of the main portion 13p of the stopper 13 is 20 GPa to 90 GPa.

With this configuration, it is possible to prevent the surface of the first member in contact with the first electrode from becoming rough while ensuring the rigidity that functions as a stopper.

Further, the method for manufacturing the joining member according to the fifth aspect of the present invention is shown by referring to, for example, FIGS. 1 and 3, any one of the first to fourth aspects of the present invention. A method of manufacturing a joining member C (see, for example, FIG. 2C) using the joining member manufacturing apparatus 1 according to the above; the first member E and the second member D are brought into contact with each other to bring the first member into contact with the first member. A pressurizing step in which the first electrode 11 pressurizes the first member E and the stopper 13 so that the first electrode 11 with which E is in contact and the second electrode 12 with which the second member D is in contact are brought close to each other. S4) and; During the pressurizing step (S4), a primary current is passed between the first electrode 11 and the second electrode 12 via the first member E and the second member D. Step (S5) and; After the primary energization step (S5), the first member E and the second member D are placed between the first electrode 11 and the second electrode 12 while maintaining the pressurization. It is provided with a secondary energization step (S6) in which a secondary current is passed through.

With this configuration, it is possible to obtain a joined member that has the accuracy of joining and suppresses surface roughness of the first member.

For example, with reference to FIGS. 1 and 3, the joining member manufacturing apparatus 1 according to any one of the first to fourth aspects of the present invention or the fifth aspect of the present invention is shown. In the method for manufacturing a joining member according to the above, in a state where the stopper 13 is in contact with the first electrode 11 and the second member D or the second electrode 12, the first electrode 11 attaches the first member E to the first member E. After a primary current is passed between the first electrode 11 and the second electrode 12 (S5) while pressurizing (S4) at the predetermined pressure, the pressing force on the first member becomes insufficient. The pressurization is increased to a second predetermined pressure higher than the first predetermined pressure in order to prevent the surface of the first member from being roughened due to the cause, and then the first electrode 11 and the second electrode 12 are used. A control device 50 that controls the current generator 15 and the moving device 16 may be provided so that a secondary current flows between the two (S6).

In order to achieve the above object, the method for manufacturing the joining member according to the sixth aspect of the present invention shows, for example, with reference to FIGS. 1 and 3, the first member E made of a metal material and the first member E. A method of manufacturing a joining member C (see, for example, FIG. 2C) in which a second member D formed of a metal material is joined; with a first member E in contact with the first electrode 11. When the first member E and the second member D are joined, they face the first electrode 11 so as to sandwich the first member E and the second member D between the first electrode 11. A second member D that comes into contact with the second electrode 12 arranged so as to be provided, and a member providing step (S1) that provides the first electrode 11 and the second member D or the second electrode 12. In between, a stopper providing step (S2) for providing a stopper 13 having a predetermined Young ratio and having an insulating portion 13s; after a member providing step (S1) and a stopper providing step (S2), a first member E Pressurization step (S4) in which the first electrode 11 pressurizes the first member E and the stopper 13 so that the first electrode 11 in contact and the second electrode 12 in contact with the second member D come close to each other. And; during the pressurization step (S4), a primary energization step (a primary energization step) in which a primary current is passed between the first electrode 11 and the second electrode 12 via the first member E and the second member D. S5) and; After the primary energization step (S5), while maintaining the pressurization, the first member E and the second member D are interposed between the first electrode 11 and the second electrode 12. It is provided with a secondary energization step (S6) in which a secondary current is passed; a predetermined Young ratio is an increase rate of the stress of the first member E in the portion in contact with the first electrode 11 in the secondary energization step (S6). The rate of increase in the stress of the stopper 13 in the portion in contact with the first electrode 11 and the rate of increase in the stress of the second member D in the portion in contact with the first electrode 11 are smaller than the smaller of the rate of increase in the stress of the second member D in the portion in contact with the second electrode 12. Alternatively, it is a Young rate at which the rate of increase in stress of the stopper 13 at the portion in contact with the second electrode 12 becomes small.

With this configuration, it is possible to prevent the surface of the first member in contact with the first electrode from becoming rough while maintaining the accuracy of joining.

According to the present invention, by providing a stopper having an insulating portion, the stopper has a predetermined Young ratio while maintaining the accuracy of joining while preventing the current from flowing from the first electrode to the second electrode via the stopper. Therefore, the rate of change in the stress of the contact portion when the first member is pressurized by the first electrode can be made larger than the rate of change in the stress of the contact portion between the first electrode and the stopper. , It is possible to prevent the surface of the first member in contact with the first electrode from becoming rough.

It is a schematic block diagram of the joining member manufacturing apparatus which concerns on embodiment of this invention. (A) is a perspective view of a rod-shaped member and an annular member, (B) is a cross-sectional view of the rod-shaped member and the annular member, and (C) is a cross-sectional view of the joining member. It is a flowchart which shows the procedure of the manufacturing method of the joint member which concerns on embodiment of this invention. It is a partial schematic block diagram of the joint member manufacturing apparatus which concerns on 1st modification of embodiment of this invention. It is a partial schematic block diagram of the joining member manufacturing apparatus which concerns on the 2nd modification of the Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, members that are the same or correspond to each other are designated by the same or similar reference numerals, and duplicate description will be omitted.

First, the joining member manufacturing apparatus 1 according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of a joining member manufacturing apparatus 1. The joining member manufacturing apparatus 1 includes a first electrode (hereinafter referred to as "upper electrode 11") that comes into contact with a first member (hereinafter referred to as "rod-shaped member E") and a second member (hereinafter referred to as "annular member D"). ), A stopper 13, a power source 15, a moving device 16, a housing 30 for accommodating the second electrode (hereinafter referred to as “lower electrode 12”), and a control device 50. Here, prior to the detailed description of the joining member manufacturing apparatus 1, the configuration of the joining member manufactured by the joining member manufacturing apparatus 1 will be illustrated.

FIG. 2A is a perspective view of the annular member D and the rod-shaped member E. FIG. 2B is a cross-sectional view of the annular member D and the rod-shaped member E. FIG. 2C is a cross-sectional view of the joining member C. The joining member C is a component in which the annular member D and the rod-shaped member E are joined. In the present embodiment, it will be described that the annular member D is formed in a ring shape and the rod-shaped member E is formed in a columnar shape. The annular member D has a columnar hollow portion Dh formed in the center of a thick disk shape. The outer circumference of the disk of the annular member D and the circumference of the hollow portion Dh are concentric circles. In the annular member D, a joint surface Df is formed by chamfering the boundary portion between the surface forming the outer periphery of the hollow portion Dh and the end surface Ds. In other words, the joint surface Df is formed by chamfering the opening appearing at the center of the end surface Ds. In the present embodiment, the annular member D is made of carburized steel whose surface is carburized with respect to low carbon steel formed in a ring shape. For this reason, the annular member D has a soft and tenacious structure inside, and the surface is hard and can be burnt when heated. Here, the fact that it can be baked means that it contains enough carbon to be baked when a predetermined condition is satisfied, and typically it is baked by heating at the time of joining, but before joining ( It may be heated (for example, in a carburized steel manufacturing plant) and already baked. The predetermined conditions differ depending on, for example, the specifications of the joining machine and the material type used as the annular member D.

The outer diameter of the rod-shaped member E is formed to be one size larger than the diameter of the hollow portion Dh of the annular member D. In the rod-shaped member E, the corners between the end face and the side surface are chamfered to form a joint surface Ef. The joint surface Ef is formed so as to be in surface contact with the joint surface Df of the annular member D. In the present embodiment, the rod-shaped member E is made of cast iron. In the present embodiment, the joining member C is configured by joining the joining surface Df and the joining surface Ef by a joining method of ring mash (registered trademark) (hereinafter, simply referred to as "ring mash joining"). There is. In the ring mash joining, a rod-shaped member E having a diameter one size larger than the diameter of the internal space is fitted into the hollow portion Dh of the annular member D by passing a pulsed current while applying pressure to join the rod-shaped member E. This is a method in which the surface Ef is solid-phase bonded completely or substantially uniformly to the bonding surface Df of the annular member D over the entire circumference. In this solid phase bonding, the members to be bonded are brought into close contact with each other and heated to a temperature below the melting point to perform bonding without melting the members. The diameter of the rod-shaped member E is one size larger than the diameter of the hollow portion Dh of the annular member D, which is a size suitable for ring mash joining, and is preferably 0.2 mm to 1.4 mm (for example). It may be 1.0 mm). To exemplify the characteristics of a joint including a ring member such as an annular member D, positioning is easy, a jig is easy, the shape of the joint surface is simple, the processing cost is low, the joint is completed in a short time, and the cycle time is short. It is short, has little thermal distortion, and is easy to obtain dimensional accuracy after joining. The joining member C can be used as a large drive system component such as a gear or a shaft.

Returning to FIG. 1 again, the description of the joining member manufacturing apparatus 1 will be continued. In the following description, when the structures of the rod-shaped member E, the annular member D, and the joint member C are referred to, FIGS. 2 (A) to 2 (C) will be referred to as appropriate. The upper electrode 11 has a contact surface 11t formed on the lower surface of the upper electrode 11 with which the rod-shaped member E contacts. The contact surface 11t is typically formed flat. The contact surface 11t is formed to have a size equal to or larger than the size of the plane of the rod-shaped member E so as to typically include the plane shape of the rod-shaped member E. The upper electrode 11 is typically supported by the moving device 16 so that the contact surface 11t is horizontal. The lower electrode 12 is arranged below the upper electrode 11, and a contact surface 12t to which the annular member D contacts is formed on the upper surface. The contact surface 12t is typically formed in a size that includes the planar shape of the annular member D. The contact surface 12t is typically formed flat, and in the present embodiment, a slight recess for determining the arrangement of the annular member D is formed. The lower electrode 12 is arranged on the bottom surface of the housing 30 so that the contact surface 12t is horizontal. The upper electrode 11 and the lower electrode 12 are made of a material that is harder than the rod-shaped member E and the annular member D in which an electric current easily flows, and is typically made of metal.

The stopper 13 is a member used to define the fitting depth when the rod-shaped member E is fitted into the hollow portion Dh (see FIG. 2) of the annular member D. In the present embodiment, the stopper 13 is formed in a cylindrical shape. The stopper 13 has a cylindrical inner diameter larger than the outer diameter of the rod-shaped member E, a cylindrical outer diameter smaller than the outer diameter of the annular member D, and is included in the contact surface 11t of the upper electrode 11. It is formed to the size that is to be used. In the present embodiment, the stopper 13 is configured such that the main portion 13p, the insulating portion 13s, and the receiving portion 13r are separably laminated in the axial direction of the cylinder. The main portion 13p is a main portion that occupies most of the stopper 13 (approximately 80 to 90%), and is a portion that regulates the fitting depth of the rod-shaped member E into the annular member D (a main portion that functions as a stopper). ). The main portion 13p is formed of a material having a Young's modulus smaller than that of both the annular member D and the rod-shaped member E, and may be formed of, for example, a material having a Young's modulus of 20 GPa to 90 GPa (may be 50 GPa). In this embodiment, it is made of aluminum. The insulating portion 13s is a portion that prevents the passage of electric current. The insulating portion 13s may be formed of a member capable of obstructing the flow of electric current, and is formed of hard alumite in the present embodiment. Since the insulating portion 13s is provided, when the stopper 13 and the annular member D are sandwiched between the upper electrode 11 and the lower electrode 12, the stopper 13 and the annular member D are interposed between the upper electrode 11 and the lower electrode 12. It is possible to suppress the flow of current through the electrodes. The receiving portion 13r is a portion that receives pressurization, and is formed of hardened iron in the present embodiment. The main portion 13p, the insulating portion 13s, and the receiving portion 13r are connected by a fastening member (not shown) such as a bolt. Further, in the entire stopper 13 to which the main portion 13p, the insulating portion 13s, and the receiving portion 13r are connected, in the present embodiment, the main portion 13p is connected to the contact surface 11t by a fastening member (not shown) such as a bolt. Therefore, it is connected to the upper electrode 11. The stopper 13 is not limited to the above-mentioned material, and the stopper 13 as a whole may be made of another material having desired rigidity and insulating property. The degree of rigidity of the stopper 13 as a whole is higher than the rate of increase in stress of the rod-shaped member E when a force is applied to the stopper 13 when a pulsed current is applied while pressurizing the rod-shaped member E and the annular member D. The stopper 13 has a Young's modulus such that the rate of increase in stress of the above is small.

The power supply 15 is a device that supplies an electric current to the upper electrode 11 and the lower electrode 12, and is electrically connected to the upper electrode 11 and the lower electrode 12. The power supply 15 is configured to generate a current flowing between the upper electrode 11 and the lower electrode 12 via a rod-shaped member E and an annular member D sandwiched between the upper electrode 11 and the lower electrode 12. Corresponds to the generator. The power supply 15 is typically configured to generate a pulsed DC current, and in the present embodiment, the AC power received from an AC power source such as a commercial AC power source or an AC generator is boosted and rectified. It has a power supply unit, a capacitor that stores and discharges electrical energy, a transformer that converts the current supplied from the power supply unit and the capacitor into a large current, and a switch component provided on the upstream side of the transformer. The power supply 15 is configured to be able to instantly discharge the energy charged in the capacitor. Therefore, in the bonding using the power source 15, a large current can be obtained in a short time, and the bonding with less thermal influence is possible. Further, in the power source 15, a relatively small capacity of the input power source (AC power source) is sufficient. The power supply 15 is configured so that the magnitude of the current supplied to the upper electrode 11 and the lower electrode 12 can be appropriately set.

The moving device 16 is a device that moves the upper electrode 11 and the lower electrode 12 in a direction toward and away from each other. In the present embodiment, the moving device 16 supports the upper electrode 11 and moves the upper electrode 11 up and down so that the upper electrode 11 and the lower electrode 12 are relatively close to each other and separated from each other. It is configured so that it can be done. The lower electrode 12 is fixed to the housing 30. However, depending on the device configuration, the upper electrode 11 may be fixed and the moving device may be configured to move the lower electrode 12, or both the upper electrode 11 and the lower electrode 12 may be moved. You may.

The housing 30 houses the devices constituting the joining member manufacturing device 1 such as the upper electrode 11, the lower electrode 12, the stopper 13, the power supply 15, and the moving device 16. With such a configuration, the joining member manufacturing apparatus 1 can be easily transported as one unit. The housing 30 is formed with an opening 31 for inserting and removing the annular member D, the rod-shaped member E, and the joining member C (see FIG. 2C).

The control device 50 is a device that controls the operation of the joint member manufacturing device 1. The control device 50 is connected to the power supply 15 by wire or wirelessly, and is configured to be able to control whether or not a current is supplied to the upper electrode 11 and the lower electrode 12 and the magnitude of the supplied current. Further, the control device 50 is connected to the moving device 16 by wire or wirelessly, and is configured so that the upper electrode 11 can be moved up and down. The control device 50 is typically attached to the housing 30 inside or outside the housing 30, but is installed at a location away from the housing 30 so as to remotely control the joining member manufacturing device 1. It may be configured.

Next, a method for manufacturing the joint member according to the embodiment of the present invention will be described with reference to FIG. FIG. 3 is a schematic view showing a procedure for manufacturing the joining member C. The method for manufacturing the joining member C described below will be performed by the joining member manufacturing apparatus 1 described so far. That is, the following description also serves as a description of the operation of the joining member manufacturing apparatus 1. It should be noted that the joining member C can be manufactured by a method other than operating the joining member manufacturing apparatus 1. In the following description of the method for manufacturing the joining member, when the detailed configuration of the joining member manufacturing apparatus 1 and the joining member C is referred to, FIGS. 1 and 2 will be referred to as appropriate.

When the annular member D and / or the rod-shaped member E is not contained inside the housing 30, the upper electrode 11 to which the stopper 13 is attached stands by at the upper part in the housing 30. When starting the production of the joining member C, first, the annular member D and the rod-shaped member E are inserted into the housing 30 through the opening 31 (member providing step: S1). At this time, first, the annular member D is placed on a slightly recessed portion of the contact surface 12t of the lower electrode 12 with the joint surface Df facing upward, and then the rod-shaped member E and the joint surface Ef are placed on the joint surface. It is placed in contact with Df and placed on the annular member D. When the annular member D and the rod-shaped member E are put into the joining member manufacturing apparatus 1, the stopper 13 is provided between the upper electrode 11 and the annular member D when viewed in the vertical direction (stopper providing step: S2). Note that the stopper providing step (S2) may be performed before the member providing step (S1), paying attention to the order of supply into the housing 30. If the stopper 13 is not connected to the upper electrode 11 in advance, the annular member D, the rod-shaped member E, and the stopper 13 are assembled (arranged) outside the housing 30, and the housing 30 is assembled in the assembled state. By putting it inside, the member providing step (S1) and the stopper providing step (S2) may be performed at the same time.

Next, the control device 50 operates the moving device 16 to lower the upper electrode 11 and bring the upper electrode 11 and the lower electrode 12 closer to each other (S3). At this time, when the upper electrode 11 starts to be lowered, the rod-shaped member E enters the cylindrical stopper 13, and first, the end surface of the rod-shaped member E comes into contact with the contact surface 11t of the upper electrode 11. When the rod-shaped member E comes into contact with the upper electrode 11, the stopper 13 is not in contact with the annular member D. Even after the rod-shaped member E comes into contact with the upper electrode 11, the control device 50 acts in the direction of lowering the upper electrode 11 via the moving device 16, whereby the upper electrode 11 pressurizes the rod-shaped member E (addition). Pressure step: S4). When the upper electrode 11 starts to pressurize the rod-shaped member E, the rod-shaped member E enters the hollow portion Dh of the annular member D. Then, while the upper electrode 11 pressurizes the rod-shaped member E, the control device 50 operates the power supply 15 to pass a pulse current (primary energization step: S5). The pulse current generated by the power supply 15 flows through a circuit formed by the upper electrode 11, the rod-shaped member E, the annular member D, and the lower electrode 12. When the current flowing between the upper electrode 11 and the lower electrode 12 passes through the contact portion between the joint surface Ef of the rod-shaped member E and the joint surface Df of the annular member D, the contact portion is pressurized by Joule heat. It is heated and softened to perform solid phase bonding (ring mash bonding). By heating and softening the contact portion, the rod-shaped member E smoothly enters the hollow portion Dh, and the stopper 13 eventually comes into contact with the annular member D. When the stopper 13 comes into contact with the annular member D, the positional relationship between the upper electrode 11 and the lower electrode 12 is determined, and the insertion depth of the rod-shaped member E with respect to the annular member D is a desired depth. At this time, a mode in which the rod-shaped member E is inserted into the annular member D at a desired depth is a predetermined mode.

The control device 50 acts in the direction of lowering the upper electrode 11 for a short time even after the stopper 13 touches the annular member D, whereby the upper electrode 11 adds the stopper 13 in addition to the rod-shaped member E. It will be pressured. That is, in the pressurizing step (S4), the pressing force is increased until the upper electrode 11 pressurizes the rod-shaped member E and the stopper 13. At this time, due to the presence of the stopper 13, the distance between the upper electrode 11 and the lower electrode 12 does not substantially change (does not affect the dimensional error when the joint member C is formed), but the rod shape due to the upper electrode 11 The pressing force on the member E and the stopper 13 increases. When the upper electrode 11 pressurizes the stopper 13, the control device 50 stops the lowering of the upper electrode 11 via the moving device 16 to stop the increase in the pressing force, while the control device 50 has a rod shape formed by the upper electrode 11. The pressurized state of the member E and the stopper 13 is maintained. Typically, at this point the pulse current flow ends. When the stopper 13 comes into contact with the annular member D, the stopper 13 is also contact-arranged between the upper electrode 11 and the annular member D at a position parallel to the rod-shaped member E. Even if the pulse current continues to flow when it comes into contact with the member D, since the stopper 13 has the insulating portion 13s, the pulse current is passed between the upper electrode 11 and the lower electrode 12 via the stopper 13 and the annular member D. Is avoided. By the above-mentioned solid phase bonding, the positional relationship between the rod-shaped member E and the annular member D is fixed, and the dimensions (including the height) of the bonding member C are determined. In the present embodiment, since the power supply 15 includes a capacitor and instantly releases electric energy, a relatively large current can be obtained in a short time (for example, several tens of milliseconds), and the joint surface Df and the joint surface Ef Is solid-phase bonded. At this time, the joint portion is in a state of being baked by heating at the time of joining. When baked, the hardness increases (for example, Vickers hardness is about 800), but it becomes vulnerable to impact, so cracks may occur.

Conventionally, in order to eliminate the possibility of cracking due to quenching, the carburized layer that can be quenched is removed only in and around the joint, or the joint is tempered. In order to prevent it, a carburizing treatment was applied to prevent the carburizing layer from being formed during carburizing, but it takes a lot of time and effort to prevent the carburizing layer from being formed at the joint, so the joint after joining. It has come to be carried out by applying an electric current to the carburizing again. Also in the present embodiment, since the current is applied again to the joint portion between the rod-shaped member E and the annular member D to perform tempering, the control device 50 applies the upper electrode 11 to the rod-shaped member E and the stopper 13. While maintaining the pressurization, the power supply 15 is operated and a pulse current is passed (secondary energization step: S6). A predetermined time may be provided between the primary energization step (S5) and the secondary energization step (S6). The predetermined time is the time required for the temperature of the joint portion, which has risen due to the primary energization, to drop to near room temperature.

In the present embodiment, since the stopper 13 has the insulating portion 13s, in the secondary energization step (S6) as well as in the primary energization step (S5), the pulse current generated by the power supply 15 is rod-shaped with the upper electrode 11. It flows through the circuit formed by the member E, the annular member D, and the lower electrode 12, and it is avoided to pass through the stopper 13 instead of the rod-shaped member E. As a result, the current flowing between the upper electrode 11 and the lower electrode 12 passes through the rod-shaped member E and the annular member D in a concentrated manner, and the joint portion can be appropriately tempered. Further, since the stopper 13 has a smaller Young's modulus (has a predetermined Young's modulus) than the rod-shaped member E and the annular member D, the ratio of the pressing force applied to the rod-shaped member E by the upper electrode 11 is the pressure applied to the stopper 13. Can be greater than the proportion of. Therefore, it is possible to prevent the pressure applied by the upper electrode 11 from being applied to the stopper 13 more than the rod-shaped member E. In other words, when the same strain is generated by pressurizing the upper electrode 11 with respect to both the rod-shaped member E and the annular member D to which the ring mash is joined by the primary energization step and the stopper 13. Since the Young's modulus of the stopper 13 is smaller than the Young's modulus of the rod-shaped member E, the rate of change of the force (stress) of the rod-shaped member E is larger than the rate of change of the force (stress) of the stopper 13. In order to create a difference in the ratio of the pressing force applied to the rod-shaped member E and the stopper 13 from the upper electrode 11, the ratio of the Young's modulus of the stopper 13 to the Young's modulus of the rod-shaped member E (Young's modulus of the stopper 13 / the rod-shaped member E). Young's modulus) is preferably 0.1 to 0.8, more preferably 0.2 to 0.5, and typically about 0.3 to 0.4. As a result, it is possible to prevent the surface of the rod-shaped member E in contact with the upper electrode 11 from becoming rough.

Conventionally, when tempering is performed by performing secondary energization while using a stopper having relatively high rigidity, the surface of the member to be joined softens and melts on the surface of the member to be joined in contact with the electrode. Roughness (roughness) caused by this may occur. This is because the pressure applied from the electrode to the member to be joined becomes smaller than the pressure applied to the stopper, the resistance between the electrode and the member to be joined increases, and the contact portion between the electrode and the member to be joined increases. It is presumed that the heat generated causes the surface of the member to be joined to soften and melt.

On the other hand, in the joining member manufacturing apparatus 1 according to the present embodiment, the Young's modulus of the stopper 13 is smaller than the Young's modulus of the rod-shaped member E and the annular member D (the stopper 13 has a predetermined Young's modulus). Since the pressing force (change rate of force (stress)) on the rod-shaped member E by the upper electrode 11 is larger than that in the conventional case, it is possible to effectively prevent the surface of the rod-shaped member E in contact with the upper electrode 11 from being roughened. When the secondary energization step (S6) is completed, the control device 50 operates the moving device 16 to raise the upper electrode, and takes out the manufactured joining member C from the housing 30 (S7). When one cycle of manufacturing the joining member C is completed and the next joining member C is manufactured, the above flow is repeated.

As described above, according to the joining member manufacturing apparatus 1 according to the present embodiment, since the stopper 13 has the insulating portion 13s, the current flowing between the upper electrode 11 and the lower electrode 12 is related. While it is possible to prevent the rod-shaped member E and the annular member D from passing through the stopper 13, the rod-shaped member E and the annular member D can be intensively passed through, and the rod-shaped member E and the annular member D can be solid-phase bonded (ring mash joint) and joined. The part can be tempered appropriately. Further, since the stopper 13 is formed at a Young's modulus smaller than that of the rod-shaped member E and the annular member D, when the upper electrode 11 pressurizes the rod-shaped member E and the stopper 13, the upper electrode 11 presses the rod-shaped member E. The rate of pressing force (rate of change in force (stress)) can be made larger than the rate of pressing force (rate of change in force (stress)) on the stopper 13, and between the upper electrode 11 and the rod-shaped member E. The resistance of the rod-shaped member E can be reduced, and the surface roughness of the rod-shaped member E in contact with the upper electrode 11 can be effectively prevented.

Next, with reference to FIG. 4, the joining member manufacturing apparatus 1A according to the first modification of the embodiment of the present invention will be described. FIG. 4 is a partial schematic configuration diagram of the joining member manufacturing apparatus 1A, and shows a schematic configuration of a portion around the upper electrode 11A and the lower electrode 12 of the joining member manufacturing apparatus 1A. The joining member manufacturing apparatus 1A includes a power supply 15, a housing 30, and a control device 50, which are omitted in FIG. 4 but shown in FIG. In the joining member manufacturing apparatus 1A, the upper electrode 11A and / or the lower electrode 12 can move in the moving direction H in the drawing, and the length of the rod-shaped member E to be joined in the moving direction H is determined by the joining member manufacturing apparatus 1. It is shorter than the rod-shaped member E joined by (see FIG. 1). Along with this, the upper electrode 11A has a main body portion 11a and a protrusion portion 11p. The main body portion 11a is configured in the same manner as the upper electrode 11 (see FIG. 1) of the joining member manufacturing apparatus 1 (see FIG. 1). The protrusion 11p is a columnar shape extending from the center of the lower surface of the main body portion 11a (the surface facing the lower electrode 12) toward the lower electrode 12 (typically cylindrical but may be prismatic). Is formed in. The surface of the protrusion 11p facing the lower electrode 12 is the contact surface 11t. In this modification, the contact surface 11t of the protrusion 11p is formed in an area equal to or slightly larger than the end surface of the rod-shaped member E. In this modification, the length of the protrusion 11p in the moving direction H is formed to be the same as the length of the stopper 13 in the moving direction H (hereinafter referred to as “moving direction length 13H”). In this modification, the stopper 13 has the same configuration as the stopper 13 of the joining member manufacturing apparatus 1 (see FIG. 1), and is arranged between the main body portion 11a of the upper electrode 11A and the end surface Ds of the annular member D. It has become so.

The Young's modulus of the stopper 13 in this modification is the Young's modulus of the portion of the rod-shaped member E in contact with the upper electrode 11A when the upper electrode 11A pressurizes the rod-shaped member E and the stopper 13 during the secondary energization step (S6). Young's modulus is such that the stress increase rate of the stopper 13 at the portion in contact with the upper electrode 11A is smaller than the stress increase rate. Since the Young's modulus of the rod-shaped member E is usually smaller than the Young's modulus of the protrusion 11p, the Young's modulus of the stopper 13 is smaller than the Young's modulus of the protrusion 11p. Here, the Young's modulus of the stopper 13 is compared with the Young's modulus of the protrusion 11p because the protrusion 11p exists in the range of the length 13H in the moving direction of the stopper 13 when the secondary energization step is performed. Because it is only. If it is the protrusion 11p and the rod-shaped member E that exist in the range of the length 13H in the moving direction, the Young's modulus of the protrusion 11p and the rod-shaped member E may be compared with the Young's modulus of the stopper 13. Here, the synthetic Young's modulus is synthesized by proportionally dividing the Young's modulus of each material when a plurality of materials are mixed within the range of the moving direction length 13H when viewed in the moving direction H in light of the above definition. Young's modulus.

The joining member manufacturing apparatus 1A configured as described above operates in the same manner as the joining member manufacturing apparatus 1 (see FIG. 1) when manufacturing the joining member C. That is, even in the joining member manufacturing apparatus 1A, the joining member C is manufactured by the procedure shown in the flowchart shown in FIG. Therefore, also in the joining member manufacturing apparatus 1A, since the stopper 13 has the insulating portion 13s (see FIG. 1), the current flowing between the upper electrode 11A and the lower electrode 12 passes through the stopper 13. It can be prevented, and the rod-shaped member E and the annular member D can be passed through intensively, and solid-phase bonding (ring mash bonding) between the rod-shaped member E and the annular member D and tempering of the bonded portion are appropriately performed. be able to. Further, since the stopper 13 is formed at a Young's modulus smaller than that of the rod-shaped member E and the annular member D, when the upper electrode 11A pressurizes the rod-shaped member E and the stopper 13, the upper electrode 11A presses the rod-shaped member E to the rod-shaped member E. The rate of change of force (stress) can be made larger than the rate of change of force (stress) on the stopper 13, and the resistance between the upper electrode 11A and the rod-shaped member E can be reduced, so that the upper electrode 11A can be reduced. It is possible to effectively prevent the surface roughness of the rod-shaped member E in contact with the rod-shaped member E.

Next, with reference to FIG. 5, the joining member manufacturing apparatus 1B according to the second modification of the embodiment of the present invention will be described. FIG. 5 is a partial schematic configuration diagram of the joining member manufacturing apparatus 1B, and shows a schematic configuration of a portion around the upper electrode 11B and the lower electrode 12 of the joining member manufacturing apparatus 1B. Like the joining member manufacturing apparatus 1A (see FIG. 4), the joining member manufacturing apparatus 1B includes a power supply 15, a housing 30, and a control device 50, which are omitted in FIG. 5 but shown in FIG. .. The upper electrode 11B has a main body portion 11a and a raised portion 11q. The main body portion 11a is configured in the same manner as the main body portion 11a of the joining member manufacturing apparatus 1A (see FIG. 4). The raised portion 11q is a columnar shape extending from the center of the lower surface (the surface facing the lower electrode 12) of the main body portion 11a toward the lower electrode 12, similar to the protruding portion 11p (see FIG. 4) of the joining member manufacturing apparatus 1A. Although it is formed in a columnar shape (typically columnar but may be prismatic), the length in the moving direction H is shorter than that of the protrusion 11p (see FIG. 4). The surface of the raised portion 11q facing the lower electrode 12 is the contact surface 11t. In this modification, the contact surface 11t of the raised portion 11q is formed in an area equal to or one size larger than the end surface of the rod-shaped member E. In the joining member manufacturing apparatus 1B, the outer diameter (outer diameter of the joining surface Df) of the annular member D to be joined in a plan view is smaller than the cylindrical inner diameter of the stopper 13. Therefore, the stopper 13 is arranged between the upper electrode 11B and the lower electrode 12 in this modification.

The Young's modulus of the stopper 13 in this modification is the Young's modulus of the portion of the rod-shaped member E in contact with the upper electrode 11B when the upper electrode 11B pressurizes the rod-shaped member E and the stopper 13 during the secondary energization step (S6). The stress increase rate of the stopper 13 in contact with the upper electrode 11B and the stress increase rate of the portion in contact with the lower electrode 12 are smaller than the smaller of the stress increase rate and the stress increase rate of the annular member D in the portion in contact with the lower electrode 12. Young's modulus at which the rate of increase in stress of the stopper 13 becomes small. The Young's modulus of the stopper 13 in the joining member manufacturing apparatus 1B according to the present modification is smaller than the synthetic Young's modulus of the raised portion 11q, the rod-shaped member E, and the annular member D existing in the range of the length 13H in the moving direction.

Even in the joining member manufacturing apparatus 1B configured as described above, when manufacturing the joining member C, the joining member C operates in the same manner as the joining member manufacturing apparatus 1 (see FIG. 1), and the joining member C operates according to the procedure of the flowchart shown in FIG. Manufactured. Therefore, also in the joining member manufacturing apparatus 1B, since the stopper 13 has the insulating portion 13s (see FIG. 1), the current flowing between the upper electrode 11B and the lower electrode 12 passes through the stopper 13. It can be prevented, and the rod-shaped member E and the annular member D can be passed through intensively, and solid-phase bonding (ring mash bonding) between the rod-shaped member E and the annular member D and tempering of the bonded portion are appropriately performed. be able to. Further, since the stopper 13 is formed to have a younger ratio smaller than that of the rod-shaped member E and the annular member D, when the upper electrode 11B pressurizes the rod-shaped member E and the stopper 13, the upper electrode 11B attaches to the rod-shaped member E. The rate of change of the force (stress) and the rate of change of the force (stress) on the annular member D by the lower electrode 12 can be made larger than the rate of change of the force (stress) on the stopper 13, and the upper electrode 11B and the rod shape The resistance between the member E and the resistance between the lower electrode 12 and the annular member D can be reduced, and the surface of the rod-shaped member E in contact with the upper electrode 11B and the surface of the annular member D in contact with the lower electrode 12 can be reduced. Roughness can be effectively prevented.

In the above description, it is assumed that the power supply 15 is configured so that the energy charged in the capacitor can be discharged instantly, but the power supply configuration may be such that a component other than the capacitor type is used.

In the above description, it is assumed that the annular member D is formed in a ring shape and the rod-shaped member E is formed in a solid columnar shape, but the rod-shaped member E may be hollow as well as solid. , The shape of the annular member D and / or the rod-shaped member E may be a shape other than these. Further, although it is assumed that the annular member D is carburized steel, it may be made of high carbon steel which may be hardened by heating at the time of joining even if it is not carburized. Further, although it is said that the annular member D is baked by heating at the time of joining, the joining member C may be manufactured by using a material that has been baked before being heated at the time of joining. Further, although the annular member D and the rod-shaped member E are different metals, they may be the same type of metal. Further, although it is assumed that the rod-shaped member E is cast iron, the rod-shaped member E may also be made of a material that can be hardened. Further, although the joining member C is manufactured by ring mash joining, it may be manufactured by a joining method other than ring mash joining such as ring projection joining.

In the above description, it was decided to perform the secondary energization step (S6) while maintaining the pressurization in the primary energization step (S5), but after the primary energization step (S5), from the pressurization step (S4). Further, the upper electrode 11 may be made to act in a downward direction to increase the pressing force of the upper electrode 11 on the rod-shaped member E and the stopper 13 (pressure increasing step). By this pressure increasing step, the upper electrode 11 and the rod-shaped member E can be surely brought into close contact with each other by increasing the pressing force after the positional relationship between the rod-shaped member E and the annular member D is determined by the primary energization. The pressing force in this pressure increasing step is preferably 20 to 60% higher than the pressing force when the upper electrode 11 pressurizes the rod-shaped member E and the stopper 13 in the primary energization step (S5). It is more preferable to add about 50%, and typically 40%. As described above, when the pressure is increased between the primary energization step (S5) and the secondary energization step (S6), the Young's modulus of the stopper 13 is smaller than the Young's modulus of the rod-shaped member E and the annular member D. Combined with the fact that a larger pressing force is applied to the rod-shaped member E in the secondary energization step (S6), the upper electrode 11 pressurizes the rod-shaped member E and the stopper 13. The effect of increasing the pressing force on the rod-shaped member E by 11 can be enhanced.

In the above description, the stopper 13 has a Young's modulus smaller than that of the rod-shaped member E and the annular member D, but even if the Young's modulus is not smaller than that of the rod-shaped member E and the annular member D, the above-mentioned primary energization is performed. If the pressure applied to the rod-shaped member E by the upper electrode 11 can be secured to such an extent that the surface of the rod-shaped member E is not roughened by the subsequent pressure increase, the Young's modulus of the stopper 13 does not have to be limited. .. The configuration of the joint member manufacturing apparatus in this case is as follows.

That is, the joining member manufacturing apparatus according to the configuration mode in which the Young rate is not limited is shown by referring to, for example, FIG. 1, a first member E made of a metal material and a second member E made of a metal material. A device 1 for manufacturing a joining member C (see, for example, FIG. 2C) in which the member D of the above is joined; with the first electrode 11 in contact with the first member E; to the second member D. The second electrode 12 to be brought into contact with the first member E and the second member D between the first electrode 11 and the first member E when the first member E and the second member D are joined. With the second electrode 12 arranged so as to sandwich the first electrode 11; between the first electrode 11 and the second electrode 12 via the first member E and the second member D. A current generator 15 that generates a current flowing through the battery; and a moving device 16 that moves at least one of the first electrode 11 and the second electrode 12 so as to bring the first electrode 11 and the second electrode 12 closer to each other. And; when the first member E and the second member D are joined, the first electrode 11 that the first member E comes into contact with and the second member D that comes into contact with the second electrode 12 A stopper 13 arranged between the above, and is in contact with the first electrode 11 and the second member 12 when the first member E and the second member D are joined in a predetermined manner. With the stopper 13 having the insulating portion 13s; the first electrode 11 attaches the first member E to the first member E in a state where the stopper 13 is in contact with the first electrode 11 and the second member D. After passing a primary current between the first electrode 11 and the second electrode 12 while pressurizing at the predetermined pressure, the pressurization is applied to a second predetermined pressure higher than the first predetermined pressure. A control device 50 for controlling the current generator 15 and the moving device 16 is provided so that a secondary current flows between the first electrode 11 and the second electrode 12 after being raised. With this configuration, it is possible to prevent the surface of the first member E from becoming rough due to insufficient pressure on the first member E when a secondary current is passed. In this way, even if the Young's modulus of the stopper 13 is not smaller than the Young's modulus of the first member E, the object can be achieved by raising the Young's modulus to a second predetermined pressure and passing a secondary current. If possible, the Young's modulus of the stopper 13 does not have to be limited.

Further, as shown in reference to FIGS. 1 and 3, for example, a method of manufacturing a joining member according to a configuration mode in which a stopper having no limitation on the Young rate is used, a first member E made of a metal material and a metal A method of manufacturing a joining member C (see, for example, FIG. 2C), in which a second member D made of a material is joined; a first member E in contact with the first electrode 11 and a first member E. When the first member E and the second member D are joined, they face the first electrode 11 so as to sandwich the first member E and the second member D between the first electrode 11. In the member providing step (S1) of providing the second member D that comes into contact with the second electrode 12 arranged so as to be; the insulating portion 13s is provided between the first electrode 11 and the second member D. A stopper providing step (S2) for providing the stopper 13 to be provided; after the member providing step (S1) and the stopper providing step (S2), the first electrode 11 and the second member D to which the first member E comes into contact are A first pressurizing step (S4) in which the first electrode 11 pressurizes the first member E and the stopper 13 so as to bring the second electrode 12 in contact with the contacting second electrode 12; the first pressurizing step (S4). A primary energization step (S5) in which a primary current is passed between the first electrode 11 and the second electrode 12 via the first member E and the second member D; After (S5), with a second pressurizing step in which the first electrode 11 pressurizes the first member E and the stopper 13 with a pressurizing force larger than the pressing force in the first pressurizing step (S4); A secondary energization step (S6) in which a secondary current is passed between the first electrode 11 and the second electrode 12 via the first member E and the second member D during the second pressurization step (S6). And. With this configuration, it is possible to prevent the surface of the first member E from becoming rough due to insufficient pressure on the first member E when a secondary current is passed.

In the above description, the upper electrode 11, the lower electrode 12, the rod-shaped member E, and the annular member D correspond to the first electrode, the second electrode, the first member, and the second member, respectively. , The lower electrode 12, the upper electrode 11, the annular member D, and the rod-shaped member E may correspond to the first electrode, the second electrode, the first member, and the second member, respectively.

In the above description, the joining member manufacturing apparatus and the manufacturing method of the joining member according to the embodiment of the present invention have been described with reference to each drawing as an example, but the configuration, structure, number, arrangement, shape, material, etc. of each part have been described. The present invention is not limited to the above specific examples, and those appropriately selectively adopted by those skilled in the art are also included in the scope of the present invention as long as the gist of the present invention is included.

1,1A, 1B Joining member manufacturing equipment 11, 11A, 11B Upper electrode 12 Lower electrode 13 Stopper 13p Main part 13s Insulation part 15 Power supply 16 Moving device C Joining member D Ring member E Rod-shaped member

Claims (6)

A device for manufacturing a joined member in which a first member made of a metal material and a second member made of a metal material are joined;
With the first electrode in contact with the first member;
A second electrode that comes into contact with the second member, and the first member and the first member are placed between the first electrode when the first member and the second member are joined. With the second electrode arranged to face the first electrode so as to sandwich the second member;
With a current generator that generates a current to flow between the first electrode and the second electrode via the first member and the second member;
With a moving device that moves at least one of the first electrode and the second electrode so as to bring the distance between the first electrode and the second electrode closer;
When the first member and the second member are joined, the first electrode in contact with the first member and the second member or the second member in contact with the second electrode. It is provided with a stopper arranged between the second electrode with which the second member is in contact;
The stopper is in contact with the first electrode and the second member or the second electrode when the first member and the second member are joined in a predetermined manner. It is made of a material that is formed so as to be present, has an insulating portion, and has a predetermined Young's modulus;
The predetermined Young's ratio is the first when a current is passed between the first electrode and the second electrode via the joined first member and the second member. It is in contact with the first electrode more than the smaller of the increase rate of the stress of the first member in the portion in contact with the electrode and the increase rate of the stress of the second member in the portion in contact with the second electrode. The rate of increase in stress of the stopper in the portion and the rate of increase in stress of the stopper in the portion in contact with the second member or the second electrode are the Young rate.
Joining member manufacturing equipment. The predetermined Young's modulus is such that the first electrode and the first member are within the range of the length of the stopper in the direction in which at least one of the first electrode and the second electrode is moved by the moving device. , The Young's modulus of the second member, and the second electrode, which is within the length range of the stopper, is smaller than the synthetic Young's modulus;
The joining member manufacturing apparatus according to claim 1. The predetermined Young's modulus is a value in which the ratio to the synthetic Young's modulus is 0.1 to 0.8;
The joining member manufacturing apparatus according to claim 2. The Young's modulus of the main part of the stopper is 20 GPa to 90 GPa;
The joining member manufacturing apparatus according to any one of claims 1 to 3. A method of manufacturing the joint member by using the joint member manufacturing apparatus according to any one of claims 1 to 4.
The first member and the second member are brought into contact with each other, and the first electrode with which the first member is in contact and the second electrode with which the second member is in contact are brought close to each other. A pressurizing step in which the first electrode pressurizes the first member and the stopper;
During the pressurization step, a primary energization step in which a primary current is passed between the first electrode and the second electrode via the first member and the second member;
After the primary energization step, a secondary current is passed between the first electrode and the second electrode via the first member and the second member while maintaining pressurization. It has a next energization process;
Manufacturing method of joining members. A method of manufacturing a joined member in which a first member made of a metal material and a second member made of a metal material are joined together;
When the first member in contact with the first electrode and the first member and the second member are joined, the first member and the second member are between the first electrode. A member providing step of providing the second member in contact with the second electrode arranged to face the first electrode so as to sandwich the member;
A stopper providing step of providing a stopper formed of a material having a predetermined Young's modulus and having an insulating portion between the first electrode and the second member or the second electrode;
After the member providing step and the stopper providing step, the first electrode with which the first member is in contact and the second electrode with which the second member is in contact are brought close to each other. With the pressurizing step of pressurizing the first member and the stopper;
During the pressurization step, a primary energization step in which a primary current is passed between the first electrode and the second electrode via the first member and the second member;
After the primary energization step, a secondary current is passed between the first electrode and the second electrode via the first member and the second member while maintaining pressurization. With the next energization process;
The predetermined Young's modulus is the rate of increase in the stress of the first member in the portion in contact with the first electrode and the stress of the second member in the portion in contact with the second electrode in the secondary energization step. The rate of increase in the stress of the stopper in the portion in contact with the first electrode and the rate of increase in the stress of the stopper in the portion in contact with the second member or the second electrode than the smaller of the rates of increase. Is the Young's modulus that becomes smaller;
Manufacturing method of joining members.

Images