JP5983538B2 - Joining method and joining apparatus for aluminum member and metal member - Google Patents

Description

  The present invention relates to a joining method for joining an aluminum member and a metal member, and a joining apparatus for joining the aluminum member and the metal member using the method.

  Conventionally, a joining method in which two metal members are pressed and joined at room temperature is known. For example, Patent Document 1 describes a joining method in which an aluminum member and a copper member are pressed against each other while energizing the aluminum member and the copper member.

JP 2011-140049 A

  However, in the joining method of the metal member described in Patent Document 1, when the aluminum member and the copper member are in pressure contact while being energized, the contact portion of the aluminum member with the copper member softens and the aluminum member and the copper member are bonded. When the relative position of the supporting electrode changes, the energization is stopped. After that, in order to join the aluminum member and the copper member by urging the aluminum member and the copper member so that the aluminum member and the copper member are pressed against each other in a state where the energization is stopped, the joining of the contact portion between the aluminum member and the copper member is performed. Strength may be reduced.

  An object of the present invention is to provide a bonding method for improving the bonding strength between an aluminum member and a metal member.

  The present invention is a method for joining an aluminum member and a metal member, wherein at least one of the aluminum member and the metal member is attached so that the aluminum member and the metal member are pressed against each other by an elastic member while energizing the aluminum member and the metal member. Displaceable distance between one end and the other end supporting the elastic member at one end while energizing the aluminum member and the metal member after the first step to be energized and the first step Urges at least one of the aluminum member and the metal member so that the aluminum member and the metal member are pressed against each other by the urging member and the elastic member provided so as to be longer than the displaceable distance between both ends of the elastic member. And a second step.

  In the joining method of the aluminum member and the metal member of the present invention, the aluminum member and the metal member are urged so that the aluminum member and the metal member are in pressure contact with each other while energizing the aluminum member and the metal member. When an electric current flows through the aluminum member and the metal member, the end of the aluminum member that is in pressure contact with the metal member softens and plastically flows. At this time, the end position of the aluminum member and the end portion of the metal member are maintained in pressure contact with each other without being affected by the softening of the aluminum member due to the urging force of the elastic member, and the explosion or melting at the press contact portion is maintained. To prevent. When the softening of the end of the aluminum member proceeds to a certain degree, the end of the aluminum member and the end of the metal member are pressed against each other by the biasing force of the elastic member and the biasing member. At this time, it is provided that the displaceable distance between one end of the biasing member that supports the elastic member and the other end is longer than the displaceable distance between both ends of the elastic member. The oxide film and the melted part formed at the end of the aluminum member and the end of the metal member are removed by the force member, and a diffusion layer between the new surfaces is formed between the end of the aluminum member and the end of the metal member. Is done. Thereby, in the joining method of the aluminum member and metal member of the present invention, a uniform and comparatively thin diffusion layer can be formed in the joined portion of the aluminum member and metal member. Therefore, it is possible to form a joint portion having a joint strength higher than that of the aluminum member or the metal member.

  In the joining method of the present invention, the first step of energizing at least one of the aluminum member and the metal member with the elastic member while energizing the aluminum member and the metal member, and energizing the aluminum member and the metal member The aluminum member and the metal member are joined by two steps of the second step of urging at least one of the aluminum member and the metal member by the elastic member and the urging member. Thereby, an aluminum member and a metal member can be joined with a comparatively few man-hour.

It is a schematic diagram of the joining apparatus by 1st Embodiment of this invention. It is a flowchart of the joining method using the joining apparatus by 1st Embodiment of this invention. It is a characteristic view showing the time change of the characteristic in the joining method of the aluminum member and metal member by a 1st embodiment of the present invention. It is a schematic diagram of the junction part of the metal member in the joining method of the aluminum member and metal member by 1st Embodiment of this invention. It is a schematic diagram of the junction part between the members in the joining method of the aluminum member and metal member of the joining apparatus of a comparative example. It is a schematic diagram of the joining apparatus by 2nd Embodiment of this invention. It is a schematic diagram explaining the deburring process in the joining method of the aluminum member and metal member by 2nd Embodiment of this invention. It is a schematic diagram explaining the deburring process in the joining method of the aluminum member and metal member of the joining apparatus of a comparative example.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
A member joining apparatus according to a first embodiment of the present invention is shown in FIG. The joining apparatus 1 includes a base 10, a load cell 20, a compressed air pressurizing unit 30, a spring pressurizing unit 40, a movable support unit 50, a fixed support unit 60, a power source 70, and the like. The joining device 1 joins an aluminum wire 55 formed of aluminum and a copper wire 65 formed of copper, which are conductive wires used for a generator or an electric motor, at room temperature. The aluminum wire 55 corresponds to an “aluminum member” recited in the claims. The copper wire 65 corresponds to a “metal member” recited in the claims.

The base 10 includes a first base 11 and a second base 12.
The 1st base 11 is formed in flat form, for example, is installed on horizontal surfaces, such as the upper surface of a table. The second base 12 is a columnar part provided so as to extend in the vertical direction from the first base 11. The second base 12 is provided with a compressed air pressurizing unit 30 on the side opposite to the side connected to the first base 11.

  The compressed air pressurization unit 30 is a so-called air cylinder, and includes an air introduction unit 31, a cylinder 32, a piston (not shown), a holder 33, and the like. The compressed air pressurizing unit 30 urges the aluminum wire 55 supported by the movable support unit 50 via a spring pressurizing unit 40 described later along the central axis of the aluminum wire 55 toward the first base 11. . The compressed air pressurizing unit 30 corresponds to a “biasing member” recited in the claims.

  The air introduction unit 31 introduces compressed air supplied from an air supply source such as a pump (not shown) into the cylinder 32. The compressed air introduced into the cylinder 32 drives the piston accommodated in the cylinder 32 so as to be able to reciprocate in the direction of the first base 11 (downward on the paper surface of FIG. 1). Thereby, the holder 33 provided on the side opposite to the side connected to the air introduction part 31 of the cylinder 32 is urged toward the first base 11.

  The load cell 20 is provided at the end of the cylinder 32 on the first base 11 side. The load cell 20 detects an acting force acting on the movable support portion 50 and outputs an electric signal corresponding to the magnitude of the detected acting force to the control portion 75. The control unit 75 controls the amount of air introduced into the air introduction unit 31 of the compressed air pressurization unit 30 based on the input electrical signal.

  The compressed air pressurizing unit 30 is displaceable between one end 332 on the first base 11 side of the holder 33 that supports the spring pressurizing unit 40 and the air introducing unit 31 as “the other end”. It is provided as follows. Further, the displaceable distance between the one end 332 and the air introduction part 31 is set to be longer than the displaceable distance of both ends of the spring 41 included in the spring pressurizing part 40.

  The spring pressure unit 40 is fixed to one end 332 of the holder 33 on the first base 11 side. The spring pressure unit 40 includes a spring 41, an adjustment screw 42, guide rails 43 and 44, a displacement member 45, a holder 46, and the like. The spring pressure unit 40 biases the aluminum wire 55 supported by the movable support unit 50 in the direction of the first base 11 along the central axis of the aluminum wire 55.

  The spring 41 is provided between the holder 46 fixed to the side wall of the holder 33 of the compressed air pressurizing unit 30 and the displacement member 45 capable of changing the relative position with respect to the holder 46. One end of the spring 41 is locked to the adjustment screw 42 in the holder 46. The other end of the spring 41 is locked to the displacement member 45. The spring 41 as an “elastic member” biases the displacement member 45 in a direction in which the holder 46 and the displacement member 45 are separated.

The holder 46 is provided with an adjusting screw 42 that can adjust the position of the end of the spring 41 on the holder 46 side with respect to the holder 46. For example, when the adjustment screw 42 is tightened with respect to the holder 46, the length of the spring 41 is shortened and the urging force of the spring 41 is increased. Guide rails 43 and 44 are provided between the holder 46 and the displacement member 45 and in the radially outward direction of the spring 41.
One end of the guide rails 43 and 44 is fixed to the end of the displacement member 45 on the holder 46 side, and the other end is inserted into a recess formed on the displacement member 45 side of the holder 46. The guide rails 43 and 44 restrict the moving direction of the displacement member 45 only in the direction of the first base 11. A movable support portion 50 is provided on the opposite side of the displacement member 45 from the holder 46 side.

  Since the spring pressing unit 40 uses the elastic force of the spring 41 as the biasing force acting on the aluminum wire 55 so that the aluminum wire 55 and the copper wire 65 are pressed against each other, the followability of the biasing force to the displacement of the aluminum wire 55 is achieved. Is superior to the compressed air pressurizing unit 30.

  The movable support portion 50 includes a support member 51, a conductive wire 52, and the like. The movable support portion 50 as the “first support portion” changes the relative position of the aluminum wire 55 with respect to the first base 11 while supporting the aluminum wire 55 having a substantially rectangular cross-sectional shape.

  The support member 51 is formed in a substantially cylindrical shape, and is provided on the side opposite to the holder 46 side of the displacement member 45 of the spring pressure unit 40. One end portion 551 of the aluminum wire 55 is inserted into the support member 51 and fixed to the support member 51. The support member 51 changes the relative position with respect to the first base 11 in accordance with the movement of the displacement member 45 of the spring pressure unit 40 while supporting the aluminum wire 55.

  The conducting wire 52 electrically connects the aluminum wire 55 and the power source 70. Specifically, the conducting wire 52 is in contact with a location where the insulating coating near the other end 552 of the aluminum wire 55 is peeled off. At this time, the aluminum wire 55 is energized by removing the coating on only one of the four side surfaces of the other end 552 of the aluminum wire 55. Thereby, a man-hour can be reduced compared with the method of inserting | pinching the aluminum wire 55 from both sides. The conducting wire 52 supplies power to the aluminum wire 55.

  The fixed support portion 60 includes a support member 61, a conductive wire 62, and the like. The fixed support portion 60 as the “second support portion” is fixed to the first base 11 while supporting the copper wire 65 having a substantially rectangular cross-sectional shape.

  The support member 61 is formed in a substantially cylindrical shape and is fixed on the flat surface 111 of the first base 11. The other end 652 of the copper wire 65 is inserted into the support member 61 and fixed to the support member 61.

  The conducting wire 62 electrically connects the copper wire 65 and the power source 70. Specifically, the conducting wire 62 is in contact with a portion where the insulating coating near one end 651 of the copper wire 65 is peeled off. At this time, the copper wire 65 is energized by removing the coating on only one of the four side surfaces of the one end 651 of the copper wire 65. Thereby, a man-hour can be reduced compared with the method of pinching the copper wire 65 from both sides. The conducting wire 62 supplies power to the copper wire 65.

  The power source 70 is, for example, a DC power source for resistance welding, and supplies power to the aluminum wire 55 and the copper wire 65 via the conductive wires 52 and 62.

  Next, the joining process of the aluminum wire 55 and the copper wire 65 as “the joining method of the aluminum member and the metal member” using the joining apparatus 1 will be described mainly based on FIGS. FIG. 2 is a flowchart of the joining process between the aluminum wire 55 and the copper wire 65. FIG. 3 is a characteristic diagram showing the time change of the state of the bonding apparatus 1 in the bonding process of the aluminum wire 55 and the copper wire 65. FIG. 3A shows on / off of energization to the aluminum wire 55 and the copper wire 65. FIG. 3B shows the change over time of the length of the spring 41. In FIG.3 (b), the natural length of the spring 41 is shown as length L40. FIG. 3C shows the change over time of the distance between the end surface 331 of the holder 33 of the compressed air pressurizing unit 30 on the first base 11 side and the flat surface 111 on the first base 11. FIG. 3D shows a change with time of the distance from the end surface 553 of one end 551 of the aluminum wire 55 to the end surface 653 of the other end 652 of the copper wire 65.

  First, in step (hereinafter, “step” is abbreviated as “S”) 101, the aluminum wire 55 is set on the support member 51 of the movable support portion 50. Further, the copper wire 65 is set on the support member 61 of the fixed support portion 60. At this time, the spring 41 is provided to be shorter than the length L40 as shown before time t1 in FIG. For this reason, the other end 552 of the aluminum wire 55 and the one end 651 of the copper wire 65 are pressed against each other by the biasing force of the spring 41 acting on the movable support portion 50.

  Next, in S102, the aluminum wire 55 and the copper wire 65 are energized. Specifically, power supply to the support members 51 and 61 is started at time t1 in FIG. As a result, the other end 552 of the pressed aluminum wire 55 and the one end 651 of the copper wire 65 rise to a temperature not lower than the eutectic point and lower than the melting point, for example, a temperature of 500 ° C. or lower. The other end 552 of 55 softens and plastically flows.

  When the end portion 552 of the aluminum wire 55 is softened by energization of the aluminum wire 55 and the copper wire 65, the aluminum wire 55 urged by the urging force generated by the spring pressing portion 40 moves in the direction of the copper wire 65. To do. Specifically, the end portion 552 that is in pressure contact with the end portion 651 cannot be fully resisted by the urging force generated by the spring pressing portion 40 as shown in FIG. The distance from 553 to the end surface 653 of the copper wire 65 is shorter than the distance L0 from the end surface 553 to the end surface 653 at S101 (between time t1 and time t2 in FIG. 3D).

  After a predetermined time has elapsed from S102, in S103, the end portion 552 of the aluminum wire 55 and the end portion 651 of the copper wire 65 are pressed against each other by the urging force generated by the spring pressurizing unit 40 and the compressed air pressurizing unit 30 (FIG. 3 (d) from time t2 to time t4). Specifically, the urging force of the compressed air pressurizing unit 30 is movable via the spring pressurizing unit 40 while the urging force of the spring pressurizing unit 40 urges the movable support unit 50 in the direction of the first base 11. The support part 50 is urged toward the first base 11. As a result, at the end portion 522 of the aluminum wire 55 and the end portion 651 of the copper wire 65 that are in pressure contact, the oxide film and the melted portion formed at the end portions 552 and 651 are in the radially outward direction of the aluminum wire 55 and the copper wire 65. Moving. In addition, a diffusion layer formed by a new surface is formed between the end portion 552 of the aluminum wire 55 and the end portion 651 of the copper wire 65 to which the oxide film and the molten portion have moved.

Next, in S104, energization of the support members 51 and 61 is stopped (time t3 in FIG. 3E). After the energization is stopped, the temperatures of the end portions 552 and 651 decrease, but the urging force generated by the spring pressurizing unit 40 and the compressed air pressurizing unit 30 acts between the aluminum wire 55 and the copper wire 65. . Thereby, the distance from the end surface 653 of the copper wire 65 to the end surface 553 of the aluminum wire 55 is further shortened (between time t3 and time t4 in FIG. 3D). After the energization is stopped, the aluminum wire 55 and the copper wire 65 are completely joined at time t4.
Finally, in S105, the joined aluminum wire 55 and copper wire 65 are removed from the support members 51 and 61.

  In the bonding apparatus 1 according to the first embodiment, the end portion 552 of the aluminum wire 55 and the end portion 651 of the copper wire 65 are heated to a temperature equal to or higher than the eutectic point and lower than the melting point by energization, so The diffusion layer is formed after moving in the direction. Here, the change of the edge part in the joining of the aluminum wire and copper wire by a cold welding as a comparative example is demonstrated based on FIG.

  In the cold welding of the comparative example, as shown in FIG. 5A, the end portion 552 of the aluminum wire 55 and the end portion 651 of the copper wire 65 supported by the support members 71 and 72, respectively, , 72 are urged in a direction in which they are pressed against each other (directions of urging forces Fa2, Fc2 in FIG. 5A). Due to the urging forces Fa2 and Fc2, a part of the end portion 552 of the aluminum wire 55 and a part of the end portion 651 of the copper wire 65 move in a direction substantially perpendicular to the direction in which the urging forces Fa2 and Fc2 act (FIG. 5B). Burr 555, 655). After the end portion 552 of the aluminum wire 55 and a part of the end portion 651 of the copper wire 65 are moved, the support of the aluminum wire 55 and the copper wire 65 by the support members 71 and 72 is once released and separated from the burr 555 and 655. The position is supported again (FIG. 5C). After the aluminum wire 55 and the copper wire 65 are supported by the support members 71 and 72 as shown in FIG. 5C, the aluminum wire 55 and the copper wire 65 are connected to each other by the support members 71 and 72. It is urged in the direction of pressure contact (direction of urging forces Fa3 and Fc3 in FIG. 5C). As a result, as shown in FIG. 5D, a part of the end portion 552 of the aluminum wire 55 and a part of the end portion 651 of the copper wire 65 further move in a direction substantially perpendicular to the direction in which the urging forces Fa3 and Fc3 act. To do. In the cold welding, these steps are repeated a plurality of times to join the aluminum wire 55 and the copper wire 65 together. However, in this bonding method, not only the diffusion layer between the aluminum wire 55 and the copper wire 65 is partially formed, but also the diffusion layer becomes relatively thick, so that the strength of the bonding portion is the aluminum wire 55 and the copper wire. Lower than line 65.

  On the other hand, in the joining apparatus 1 according to the first embodiment, as shown in FIG. 4A, the end portion 552 of the aluminum wire 55 and the end portion 651 of the copper wire 65 are energized by the conducting wires 52 and 62 while being attached. The forces Fa0 and Fc0 act. At this time, the urging forces Fa0 and Fc0 are the urging forces generated by the spring 41 of the spring pressurizing unit 40, and the ends of the aluminum wire 55 and the ends of the copper wire 65 that are prevented from exploding or melting and softened by energization. The aluminum wire 55 and the copper wire 65 are pressed against each other according to a change in position with the portion 551.

  Next, when the end 552 of the aluminum wire 55 is softened to a certain extent, the end of the aluminum wire 55 is applied by the urging forces Fa1 and Fc1 obtained by adding the urging force of the spring pressing unit 40 and the urging force of the compressed air pressing unit 30. The portion 552 and the end portion 651 of the copper wire 65 are brought into pressure contact with each other, and the oxide film and the melted portion formed on the surfaces of the end portions 552 and 651 are moved radially outward like burrs 554 and 654. At this time, since the aluminum wire 55 and the copper wire 65 are energized, a diffusion layer with a new surface is formed between the end portion 552 and the end portion 651, and the aluminum wire 55 and the copper wire 65 are joined.

In the joining apparatus 1 according to the first embodiment, first, the end portions 551 and 651 are appropriately biased by the biasing force of the spring 41 while being heated to a temperature not lower than the eutectic point and lower than the melting point. Thus, the ends 551,651 are easily exposed fresh surface to prevent爆飛and melted by plastic flow, easily joined with new surfaces and the aluminum wire 55 and copper 65. In addition, when the end portion 552 is softened to a certain extent, the end portions 552 and 651 are energized to be pressed against the aluminum wire 55 and the copper wire 65, thereby smoothly diffusing metal atoms. Thereby, a uniform and thin diffusion layer can be formed between the end portion 552 and the end portion 651. In addition, when the end of the aluminum wire and the end of the copper wire are melted by energization, the joining portion becomes brittle, so that the joining strength is lowered. Since it is heated only to a temperature not lower than the eutectic point and lower than the melting point, no melted portion is generated. Further, even when a melted portion is generated, the end portion 552 and the end portion 651 are biased so as to come into pressure contact with each other, so that the melted portion does not move in the radially outward direction from the joined portion. Thereby, embrittlement of the joint portion can be prevented. Therefore, in the joining apparatus 1 according to the first embodiment, the strength of the joined portion between the aluminum wire 55 and the copper wire 65 can be increased.

  Moreover, in the joining apparatus 1, by using together the spring pressurization part 40 which generate | occur | produces urging | biasing force with the elastic force of the spring 41, and the compressed air pressurization part 30 which generate | occur | produces urging | biasing force with compressed air, The copper wire 65 is joined by one pressurization and energization. In particular, the aluminum wire 55 and the copper wire 65 are brought into pressure contact with each other by using the spring 41 having a high followability with respect to a change in the distance between the end portion 552 of the aluminum wire 55 to be softened and the end portion 651 of the copper wire 65. Thereby, explosion and melting at the softened end portion 552 can be avoided. Further, when the softening progresses to such an extent that the oxide films formed on the end portions 552 and 651 can be removed, the compressed air pressurizing portion has a relatively long displaceable distance, although the followability to the displacement is inferior to that of the spring. 30 is used to press the end portion 552 of the aluminum wire 55 and the end portion 651 of the copper wire 65 while removing the oxide film, thereby joining the aluminum wire 55 and the copper wire 65 to each other. Thereby, in the joining apparatus 1 by 1st Embodiment, the aluminum wire 55 and the copper wire 65 can be joined with sufficient intensity | strength by a comparatively few process using the two pressurization parts which have a different characteristic.

  In the joining device 1, when the aluminum wire 55 and the copper wire 65 are joined, an urging force is applied in the central axis direction of the aluminum wire 55 or the copper wire 65. Thereby, the burrs 554 and 654 formed at the joint portion between the aluminum wire 55 and the copper wire 65 are formed on the outer side in the radial direction of the aluminum wire 55 and the copper wire 65. Therefore, even after the burrs 554 and 654 are removed, the cross-sectional area of the bonded portion is maintained as the cross-sectional area of the aluminum wire 55 or the copper wire 65 before bonding, and a large amount of current can flow.

Moreover, in the joining apparatus 1, it supplies with electricity so that the temperature of the edge part 552 of the aluminum wire 55 and the edge part 651 of the copper wire 65 may become more than a eutectic point and less than melting | fusing point. Thus, compared with a biasing force for use in cold welding for joining the aluminum wire and copper wire, it is possible to reduce the biasing force for pressing the aluminum wire 55 and copper 65.

(Second Embodiment)
Next, the joining apparatus by 2nd Embodiment of this invention is demonstrated based on FIGS. The second embodiment differs from the first embodiment in the shape of the movable support portion that supports the aluminum wire. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st Embodiment, and description is abbreviate | omitted.

  In the joining device 2 according to the second embodiment, a guide 83 is provided on the support member 81 of the movable support portion 80. The guide 83 as a “regulator” is formed in a cylindrical shape, and is provided substantially in parallel with the aluminum wire 55 on the end side of the support member 81 that supports the aluminum wire 55. A pressure contact portion between the end portion 552 of the aluminum wire 55 and the end portion 652 of the copper wire 65 is located inside the guide 831. In the joining apparatus 2 according to the second embodiment, the inside 831 of the guide 83 is formed so that the cross-sectional shape perpendicular to the central axis of the aluminum wire 55 is rectangular.

Here, the shape of the burr formed around the bonded portion when the aluminum wire 55 and the copper wire 65 are bonded by the bonding apparatus 2 and the deburring process for cutting off the burr will be described with reference to FIG.
After the aluminum wire 55 and the copper wire 65 are set on the support member 51 of the movable support portion 50 and the support member 61 of the fixed support portion 60, energization of the support members 51 and 61 is started. After the end 552 of the aluminum wire 55 is softened, the biasing force of the spring pressurizing unit 40 and the compressed air pressurizing unit 30 is applied between the end 551 of the aluminum wire 55 and the end 651 of the copper wire 65. As a result, a part of the softened end portion 551 moves in the radially outward direction of the aluminum wire 55 and the copper wire 65, and a burr 85 is formed as shown in FIG. At this time, as shown in FIG. 7B, the burr 85 is formed by the inner wall of the guide 83 so as to have a substantially rectangular annular shape around the joint portion between the aluminum wire 55 and the copper wire 65.

  After joining the aluminum wire 55 and the copper wire 65 with the joining device 2, the burr 85 is cut off in the deburring step. As a deburring method, as shown in FIG. 7B, a joining portion between an aluminum wire 55 and a copper wire 65 is placed on a stage 92 having a stage surface 91. At this time, the reference surface 851 of the burr 85 formed in a substantially rectangular annular shape is placed on the stage surface 91 of the stage 92. While pressing the joining portion with the pressing member 931 against the joining portion between the aluminum wire 55 and the copper wire 65 on the stage 92, the length between the cutting edges is the thickness D of the aluminum wire 55 or the copper wire 65 before joining. A burr 85 formed around the joint portion is cut using a cutting tool 93 having the same size. As a result, the cross-sectional shape of the joined portion after the burr 85 is cut out is substantially rectangular as shown in FIG. 7C, and the cross-sectional area is also joined. It is the same size as the cross-sectional area of the previous aluminum wire 55

Here, as a comparative example, the shape of a burr in the joining of an aluminum wire and a copper wire by a joining device that does not have a support member guide and a deburring method for removing the burr will be described with reference to FIG.
In the joining device of the comparative example, when the aluminum wire 55 and the copper wire 65 are joined, as shown in FIGS. 8A and 8B, the cross-sectional shape is around the joined portion of the aluminum wire 55 and the copper wire 65. A burr 95 having a substantially elliptical annular shape is formed. As shown in FIG. 8B, when the burr 95 is placed on the stage surface 91 on the stage 92, the side surface 951 of the burr 95 has a curved shape and is not stable on the stage surface 91. In this state, when the burr 95 formed around the joining portion is cut by the cutting tool 93 while the joining portion is pressed by the pressing member 931, the joining after the burr 95 is cut as shown in FIG. The cross-sectional shape of the portion 952 is different from the cross-sectional shape of the aluminum wire 55 before joining, and the cross-sectional area is also smaller than the cross-sectional area of the aluminum wire 55 before joining.

  In the joining device 2, the cross-sectional shape of the burr 85 formed around the joined portion is a substantially rectangular ring shape by the guide 83 provided on the support member 51 that supports the aluminum wire 55. In the deburring process, when it is placed on the stage surface 91 of the stage 92, it is stabilized on the stage surface 911. When the burr 85 is cut off by the cutting tool 93, the cross-sectional area of the joint portion can be maintained at the cross-sectional area before joining. Thereby, in the joining apparatus 2 by 2nd Embodiment, in addition to the effect of 1st Embodiment, much more electric current can be sent.

(Other embodiments)
(A) In the above-described embodiment, the aluminum wire is set on the support member of the movable support portion, and the copper wire is set on the support member of the fixed support portion. However, the relationship between the supported metal material and the support portion is not limited to this. You may set a copper wire in the support member of a movable support part. In addition, both the support member that supports the aluminum wire and the support member that supports the copper wire may move so as to change the relative position.

  (A) In the above-described embodiment, the “metal member” joined to the aluminum wire which is the “aluminum member” is a copper wire. However, the material of the member joined to the “aluminum member” is not limited to this. Any metal that forms a eutectic with aluminum may be used.

  (C) In the above-described embodiment, the compressed air pressurizing unit as the “urging member” generates the urging force by the compressed air. However, the drive source that generates the biasing force is not limited to this. What is necessary is just the "biasing member" provided so that the displaceable distance between one edge part and the other edge part may become long compared with the displaceable distance of the both ends of a spring. For example, an electric servo, hydraulic pressure, or a connecting spring in which a plurality of springs are connected may be used.

  (D) In the above-described embodiment, the aluminum wire and the copper wire are formed to have a substantially rectangular cross-sectional shape. However, the cross-sectional shapes of the aluminum wire and the copper wire are not limited to this. Polygon shape may be sufficient and circular shape may be sufficient. In the joining method and joining apparatus of the aluminum member and metal member of the present invention, the aluminum member and metal member of these shapes can be joined. Further, an insulating film may be attached.

  (E) In the above-described embodiment, the “elastic member” that biases the aluminum wire through the movable support portion is a spring. However, the “elastic member” is not limited to this. Any member having elastic force may be used.

  (F) In the second embodiment, the inside of the guide is formed so that the cross-sectional shape perpendicular to the central axis of the aluminum wire is rectangular. However, the cross-sectional shape inside the guide is not limited to this. Any shape can be used as long as a plane on which a joint portion of an aluminum wire and a copper wire can be stably placed on the stage surface of the stage used in the deburring step can be formed.

  As mentioned above, this invention is not limited to such embodiment, It can implement with a various form in the range which does not deviate from the summary.

1, 2 ... Joining device,
30: Compressed air pressurizing part (biasing member),
31 ・ ・ ・ Air introduction part,
332 ... one end,
41... Spring (elastic member),
50 ... movable support part (first support part),
55 ... Aluminum wire (aluminum member),
60 ・ ・ ・ Fixed support part (second support part),
65 ... Copper wire (metal member),
70 ・ ・ ・ Power supply,
83 ・ ・ ・ Guide (Regulator),
85 ・ ・ ・ Bali.

Claims (11)

While energizing the aluminum member (55) and the metal member (65), the elastic member (41) biases at least one of the aluminum member and the metal member so that the aluminum member and the metal member are in pressure contact with each other. The first step;
After the first step, while energizing the aluminum member and the metal member, the elastic member is supported on one end (332) and between the one end and the other end (31). The urging member (30) provided so that the displaceable distance is longer than the displaceable distance between both ends of the elastic member, and the elastic member so that the aluminum member and the metal member are in pressure contact with each other. A second step of biasing at least one of the aluminum member and the metal member;
The joining method of the aluminum member and metal member characterized by including these. In the second step, the biasing member and the elastic member bias the at least one member of the aluminum member and the metal member by a biasing force equal to or greater than the biasing force of the elastic member in the first step. The joining method of the aluminum member and metal member of Claim 1 characterized by the above-mentioned. In the aluminum member and the metal member, the temperatures of the end portion (552) of the aluminum member that contacts the metal member and the end portion (651) of the metal member that contacts the aluminum member are equal to or higher than the eutectic point and less than the melting point. The method for joining an aluminum member and a metal member according to claim 1 or 2 , wherein the energization is performed so that The aluminum member according to any one of claims 1 to 3 , wherein at least one of the aluminum member and the metal member is biased in a central axis direction of the aluminum member or the metal member. Joining method of metal and metal member. A first support (50) for supporting the aluminum member (55);
A second support portion (60) provided to face the first support portion and supporting the metal member (65);
A power source (70) for supplying power to the first support part and the second support part;
The aluminum member supported by the first support part and the metal member supported by the second support part are biased so that at least one of the first support part or the second support part is urged. An elastic member (41);
The elastic member is supported on one end (332), and the displaceable distance between the one end and the other end (31) is larger than the displaceable distance at both ends of the elastic member. The first support part or the second support part is provided so that the aluminum member supported by the first support part and the metal member supported by the second support part are in pressure contact with each other. A biasing member (30) for biasing at least one;
With
The apparatus for joining an aluminum member and a metal member, wherein the first support part and the second support part are provided so that a relative position can be changed. At least one of the first support portion and the second support portion has a restricting portion (83) for adjusting the shape of a burr (85) at a portion where the aluminum member and the metal member are joined. Item 6. An apparatus for joining an aluminum member and a metal member according to Item 5 . The restricting portion is formed in a cylindrical shape,
The apparatus for joining an aluminum member and a metal member according to claim 6 , wherein a cross-sectional shape inside the restricting portion is a rectangular shape. The power source is configured such that the temperatures of the end portion (552) of the aluminum member that contacts the metal member and the end portion (651) of the metal member that contacts the aluminum member are equal to or higher than the eutectic point and lower than the melting point. Electric power is supplied to a member and the said metal member, The joining apparatus of the aluminum member and metal member as described in any one of Claims 5-7 characterized by the above-mentioned. The said elastic member and the said urging | biasing member urge | bias at least one member of the said aluminum member and the said metal member in the central-axis direction of the said aluminum member or the said metal member, Any one of Claims 5-8 characterized by the above-mentioned. An apparatus for joining an aluminum member and a metal member according to claim 1. The joining apparatus of the aluminum member and metal member as described in any one of Claims 5-9 provided with the control part (75) which controls the magnitude | size of the biasing force which the said biasing member generate | occur | produces. The control unit supplies power to the first support unit and the second support unit when the aluminum member and the metal member are in contact with each other as a first step only by the urging force of the elastic member. After press-contacting the aluminum member and the metal member, while supplying electric power to the first support portion and the second support portion as a second step, by an urging force equal to or greater than the urging force of the urging member in the first step The apparatus for joining an aluminum member and a metal member according to claim 10, wherein the biasing force generated by the biasing member is controlled so as to press-contact the aluminum member and the metal member.

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