Bonding device

Abstract

To provide a bonding device which does not generate an unnecessary portion at a bonding part.SOLUTION: A bonding device 1 comprises: an anvil 17 on which a plurality of bonding members 3 are disposed; and a pressing member 19 which presses the bonding members 3 toward the anvil 17, and which forms a bonding part 15 that bonds the plurality of bonding members 3 together. The pressing member 19 is provided with a cutting part 27 which cuts an unnecessary portion with respect to an outer edge of the bonding part 15.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a joining device. [Background technology]

[0002] Conventionally, joining devices include an anvil on which terminals and the conductor portions of electric wires are arranged as joining members. Also, a joining device is known that includes a horn as a pressing member that presses the terminal and the conductor portions of the electric wires toward the anvil to form a joint that joins the terminal and the conductor portions of the electric wires (see Patent Document 1). In this joining device, the horn is formed with a recess that receives the conductor portion of the electric wire. In such joining devices, the spatial area of ​​the recess is set within a predetermined range relative to the cross-sectional area of ​​the conductor portion of the electric wire, thereby suppressing the occurrence of unnecessary portions such as burrs in the joint. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-192413 Summary of the Invention [Problem to be solved by the invention]

[0004] In a joining device such as that disclosed in Patent Document 1, the recess accommodates the conductor of the electric wire, thereby preventing the formation of unwanted parts such as burrs at the joint. However, there is still a possibility that unwanted parts may occur at the joint. For example, if the conductor of the electric wire is positioned so that it protrudes from the recess, the protruding part of the conductor may be joined to the terminal in a state where it protrudes from the outer edge of the joint. Since the part protruding from the outer edge of the joint is unwanted part such as burrs, it was necessary to remove the unwanted part after the joint was formed.

[0005] The present invention has been made in view of the problems inherent in the prior art, and an object of the present invention is to provide a joining device that does not produce unnecessary portions in the joining portion. [Means for solving the problem]

[0006] The joining device according to this embodiment includes an anvil on which a plurality of joining members are placed, and a pressing member that presses the joining members toward the anvil to form a joining portion that joins the plurality of joining members together, and the pressing member is provided with a cutting portion that cuts off unnecessary portions from the outer edge of the joining portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a joining device that does not produce unnecessary portions at the joining portion. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the joining apparatus according to the present embodiment before joining a plurality of joining members. [Figure 2] FIG. 2 is a cross-sectional view of the joining apparatus according to the present embodiment before joining a plurality of joining members. [Figure 3] FIG. 10 is a cross-sectional view of the joining apparatus according to the present embodiment when joining a plurality of joining members. [Figure 4] 10 is an enlarged cross-sectional view of a main part of the joining apparatus according to the present embodiment when joining a plurality of joining members. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] The joining device according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the sake of explanation and may differ from the actual proportions.

[0010] As shown in FIG. 1, a joining device 1 according to this embodiment is a device that joins a plurality of joining members 3, for example, terminals 5 and conductors 9 of electric wires 7, by ultrasonic joining.

[0011] As shown in FIGS. 1 to 4, the terminal 5 is made of a conductive material such as copper or a copper alloy. The surface of the terminal 5 may be plated with tin or the like, but may not be plated. The terminal 5 includes, for example, an electrical connection portion (not shown) electrically connected to a mating terminal (not shown), and an electric wire connection portion 11 electrically connected to a conductor 9 of the electric wire 7. The electric connection portion and the electric wire connection portion 11 are formed as a continuous single member. The electric connection portion may be a tab-shaped male type or a box-shaped female type. The electric wire connection portion 11 is formed, for example, in the shape of a rectangular plate. The conductor 9 of the electric wire 7 is joined to the electric wire connection portion 11 by ultrasonic welding, thereby electrically connecting the terminal 5 and the electric wire 7. By joining the electric wire connection portion 11 and the conductor 9, the terminal 5 and the electric wire 7 are integrally formed.

[0012] As shown in FIGS. 1 to 4 , the electric wire 7 includes, for example, a conductor 9 and an insulating coating 13 made of an insulating material that covers the outer periphery of the conductor 9. The conductor 9 is made of a conductive material such as copper, a copper alloy, aluminum, or an aluminum alloy. The conductor 9 is a stranded wire formed by twisting multiple strands together, but it may also be, for example, a single-core wire or a braided wire formed by weaving multiple strands together. In addition, the electric wire 7 may also be, for example, a flexible printed circuit board (FPC) in which the conductor 9 is formed on a flexible base member. The conductor 9 of the electric wire 7 is joined to the wire connection portion 11 of the terminal 5 by the joining device 1 to form a joint 15. The wire connection portion 11 is longer and wider than the conductor 9, so the joint 15 is formed on the surface of the wire connection portion 11. Therefore, the outer edges of the joint 15 are located on both sides in the width direction of the conductor 9 joined to the surface of the wire connection portion 11 and on the tip end side in the length direction of the conductor 9.

[0013] As shown in FIGS. 1 to 4, the joining device 1 includes an anvil 17 and a pressing member 19.

[0014] The anvil 17 is a receiving jig that receives the load from the pressing member 19. The anvil 17 has a planar arrangement surface 21 with a knurled surface. After the terminals 5 are arranged on the arrangement surface 21 of the anvil 17, the conductors 9 are arranged on top of the terminals 5. The terminals 5 and conductors 9 arranged on the arrangement surface 21 of the anvil 17 are pressed toward the anvil 17 by the pressing member 19.

[0015] The pressing member 19 is disposed above the anvil 17 and is movable toward and away from the anvil 17. The pressing member 19 generates ultrasonic vibrations whose vibration direction is along the length of the conductor 9, and serves as a horn, a joining jig, capable of applying pressure toward the anvil 17. The pressing member 19 has a curved contact surface 23 with a knurled surface. The conductor 9 comes into contact with the contact surface 23 of the pressing member 19 while a load is applied toward the anvil 17. The pressing member 19 generates ultrasonic vibrations while applying pressure to the conductor 9, thereby forming a joint 15 that joins the terminal 5 and the conductor 9.

[0016] The pressing member 19 is provided with cutting portions 27 that cut off unnecessary portions 25, such as burrs, from the outer edge of the joint 15. The cutting portions 27 are provided at both ends of the pressing member 19 in the width direction (left-right direction in FIG. 2 ) and at one end of the pressing member 19 in the length direction (the tip side of the conductor 9 in FIG. 1 ), so as to be located at the outer edge of the joint 15. The cutting portions 27 are inclined so that the angle θ formed with respect to a line L along the pressing direction is an acute angle, and extend in the pressing direction. The cutting portions 27 are formed sharply so that the end in the pressing direction can cut the conductor 9 protruding from the outer edge of the joint 15. Note that the angle θ formed with the cutting portion 27 and the line L is preferably 30° or less.

[0017] Cutting portions 27 located at the widthwise ends of pressing member 19 extend along the length of pressing member 19. Cutting portions 27 located at the widthwise ends of pressing member 19 cut off unnecessary portions 25 of conductor 9 that become burrs and extend from the widthwise ends of joint 15 at the outer edge of joint 15 due to the pressure of pressing member 19. Therefore, when joint 15 is formed, unnecessary portions 25 such as burrs are not generated at the outer edge of joint 15.

[0018] Cutting portion 27, located at one end of pressing member 19 in the length direction, extends along the width direction of pressing member 19. Cutting portion 27, located at one end of pressing member 19 in the length direction, cuts off an unnecessary portion (not shown) of conductor 9 that becomes an excess portion of conductor 9 that protrudes from one end of joining portion 15 in the length direction due to the pressure of pressing member 19 at the outer edge of joining portion 15. Therefore, when joining portion 15 is formed, an unnecessary portion such as an excess portion does not occur at the outer edge of joining portion 15.

[0019] By providing the cutting portion 27 in the pressing member 19, when the joint 15 is formed, no unnecessary portion 25 such as burrs or excess length is generated on the outer edge of the joint 15. Therefore, after the joint 15 is formed, there is no need to remove the unnecessary portion 25, which reduces costs and manufacturing time.

[0020] Although cutting portion 27 is formed as a single member that is continuous with pressing member 19, this is not limiting, and cutting portion 27 may be formed as a separate member from pressing member 19 and made detachable from pressing member 19. In this case, it is preferable that the position of cutting portion 27 relative to pressing member 19 is changeable. By making the position of cutting portion 27 changeable, one pressing member 19 can be used to accommodate various sizes of joints 15.

[0021] Here, pressing member 19 is a horn used in ultrasonic bonding, but is not limited to this and may be, for example, an electrode used in resistance spot welding or a crimper used in crimping. By providing cutting portion 27 on pressing member 19 as an electrode, unnecessary portions such as burrs are prevented from occurring on the outer edge of joint 15. Cutting portion 27 on pressing member 19 as a crimper is positioned to cut off the excess portion of conductor 9 that extends beyond the crimping piece (not shown) of terminal 5. By providing cutting portion 27 in this manner, unnecessary portions such as excess portions are prevented from occurring on the outer edge of joint 15.

[0022] Such a joining device 1 includes an anvil 17 on which a plurality of joining members 3 are placed, and a pressing member 19 that presses the joining members 3 toward the anvil 17 to form a joining portion 15 that joins the plurality of joining members 3. The pressing member 19 is provided with a cutting portion 27 that cuts off an unnecessary portion 25 from the outer edge of the joining portion 15.

[0023] By providing the cutting portion 27 in the pressing member 19, when the joint 15 is formed, no unnecessary portion 25 such as burrs or excess length is generated on the outer edge of the joint 15. Therefore, after the joint 15 is formed, there is no need to remove the unnecessary portion 25, which reduces costs and manufacturing time.

[0024] Therefore, in such a joining device 1, the unnecessary portion 25 in the joining portion 15 is not generated.

[0025] The pressing member 19 is a horn that generates ultrasonic vibrations.

[0026] Therefore, it is possible to prevent the unnecessary portion 25 from being generated in the bonded portion 15 formed by ultrasonic bonding.

[0027] The cutting portion 27 is formed so that the angle θ formed between the cutting portion 27 and a straight line L along the pressing direction is set to an acute angle, and the cutting portion 27 is inclined so that the end in the pressing direction is sharp.

[0028] Therefore, by the pressure of the pressing member 19, the unnecessary portion 25 of the joint 15 can be stably cut off by the cutting portion 27.

[0029] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

[0030] For example, the multiple joining members are terminals and conductors, but this is not limited to this. For example, the multiple joining members may be conductors and conductors, terminals and terminals, or any other joining members.

[0031] Furthermore, although the number of the plurality of joining members is two, the number of the plurality of joining members is not limited to two, and may be three or more. [Explanation of symbols]

[0032] 1 Bonding equipment 3 Joint materials 15 Joint 17 Anvil 19 Pressing member 25 Unnecessary part 27 Cut section L straight line θ angle

Claims

1. an anvil on which a plurality of joining members are disposed; a pressing member that presses the joining members toward the anvil to form a joining portion that joins the plurality of joining members; Equipped with The pressing member is provided with a cutting portion that cuts off unnecessary portions from the outer edge of the joint.

2. 2. The joining device according to claim 1, wherein the pressing member is a horn that generates ultrasonic vibrations.

3. The joining device according to claim 1 or 2, wherein the angle formed between the cutting portion and a straight line along the pressing direction is set to an acute angle, and the cutting portion is formed inclined so that the end in the pressing direction is sharp.

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