JP2021186875A - Ultrasonic joining device - Google Patents

Abstract

To provide an ultrasonic joining device that can join electric conductors of a wide variety of plurality of electric wires to each other in an appropriate state and secure stable machine performance and electrical performance.SOLUTION: An ultrasonic joining device 10, which joins electric conductors 22 of at least two different kinds of electric wires 20 to each other by ultrasonic joining between a hone 12 for ultrasonic joining and an anvil 13, comprises a receiving jig 15, which can join the electric conductors 22 to each other while keeping a positional relation between the at least two different kinds of electric wires 20, in at least either of the hone 12 and the anvil 13.SELECTED DRAWING: Figure 1

Description

The present invention relates to an ultrasonic bonding device that applies ultrasonic vibration to each conductor of a plurality of electric wires to bond the conductors to each other.

As this kind of ultrasonic bonding apparatus, there is one disclosed in Patent Document 1. The ultrasonic bonding device disclosed in Patent Document 1 includes a main body of an ultrasonic bonding device and an electric wire arrangement jig for arranging electric wires at the time of ultrasonic bonding between conductors. This electric wire arrangement jig has an electric wire arrangement groove in which the interval in the width direction is continuously narrowed from the insertion start side of the electric wire toward the bottom. Since ultrasonic energy is uniformly applied to the conductors of the electric wires arranged in the electric wire arrangement groove of the electric wire arrangement jig, good bonding strength can be obtained.

Japanese Unexamined Patent Publication No. 2018-140396

However, in the conventional ultrasonic bonding device, it is difficult to secure stable mechanical performance and electrical performance because there is no equipment that regulates the arrangement of electric wires and can be arbitrarily controlled.

The present invention has been made in view of the problems of the prior art. An object of the present invention is to provide an ultrasonic bonding apparatus capable of bonding conductors of a wide variety of electric wires in an appropriate state and ensuring stable mechanical performance and electrical performance. be.

The ultrasonic bonding device according to an aspect of the present invention is an ultrasonic bonding device that bonds each conductor of at least two different types of electric wires between a horn for ultrasonic bonding and an anvil by ultrasonic bonding. On at least one side of the horn and the anvil, a receiving jig that enables bonding between the conductors while maintaining the positional relationship between the at least two different types of electric wires is provided.

The horn is fixed to the base, and it is preferable that the anvil is provided so as to be able to move up and down with respect to the horn fixed to the base.

A receiving jig is arranged on the base on the side where the electric wire is held by the anvil, and the receiving jig has an electric wire receiving plate that maintains a positional relationship between at least two different types of electric wires, and the electric wire receiving plate is formed by the electric wire receiving plate. It is preferable to move up and down with the raising and lowering of the anvil.

The receiving jig is fixed to the base on the side where the electric wire is held by the horn, and the receiving jig is one of at least two different types of electric wires at the same position as the ultrasonic vibration applying surface of the horn. It is preferable to have a wire receiving plate that keeps the position of.

Receiving jigs are arranged on both sides of the base that holds the electric wire with the horn and the side that holds the electric wire with the anvil, respectively, and at least two receiving jigs fixed to the base on the side that holds the electric wire with the horn are at least 2. Of the different types of wires in the book, it is preferable to hold the wire made of a hard metal or the wire having a large conductor in a predetermined position.

According to the present invention, it is possible to provide an ultrasonic bonding apparatus capable of bonding conductors of a wide variety of a plurality of electric wires in an appropriate state and ensuring stable mechanical performance and electrical performance. ..

It is a schematic front view which shows an example of the state before butt-bonding two electric wires by the ultrasonic bonding apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing which follows the line II-II in FIG. It is a schematic front view which shows the state which the said two electric wires are butted and joined. FIG. 3 is a cross-sectional view taken along the line IV-IV in FIG. It is a schematic front view which shows the state before joining two electric wires in the same direction in another embodiment of the said 1st Embodiment. It is a schematic front view which shows the state which two electric wires are joined in the same direction in the other embodiment of the said 1st Embodiment. It is a schematic front view which shows the state before butt-joining two electric wires by the receiving jig of another embodiment of the said 1st Embodiment. It is sectional drawing which follows the line VIII-VIII in FIG. It is a schematic front view which shows an example of the state before butt-bonding two electric wires by the ultrasonic bonding apparatus which concerns on 2nd Embodiment of this invention. 9 is a cross-sectional view taken along the line XX in FIG. It is a schematic front view which shows the state which two electric wires were butt-bonded by the ultrasonic bonding apparatus of the 2nd Embodiment. 11 is a cross-sectional view taken along the line XII-XII in FIG. It is a schematic front view which shows the state before joining two electric wires in the same direction in another embodiment of the said 2nd Embodiment. It is a schematic front view which shows the state which two electric wires are joined in the same direction in the other embodiment of the said 2nd Embodiment. It is a schematic front view which shows an example of the state before butt-bonding three electric wires of different kinds in the ultrasonic bonding apparatus which concerns on 3rd Embodiment of this invention.

Hereinafter, the ultrasonic bonding apparatus according to the embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic front view showing an example of a state before two electric wires are butted and bonded by the ultrasonic bonding apparatus according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a schematic front view showing a state in which two electric wires are butted and joined. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a schematic front view showing a state before joining two electric wires in the same direction in another form. FIG. 6 is a schematic front view showing a state in which two electric wires are joined in the same direction in another form. FIG. 7 is a schematic front view showing a state before joining two electric wires by butting them with a receiving jig of another form. FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG.

As shown in FIGS. 1 to 8, the ultrasonic bonding device 10 has a plurality of two electric wires 20 and 20 between a horn 12 fixed to a base 11 and an anvil 13 that moves up and down with respect to the horn 12. Each core wire (conductor) 22 made of the strands 22a is bonded by ultrasonic bonding. Then, on the base 11 on the side where the electric wire 20 is pressed by the anvil 13 (hereinafter referred to as the anvil 13 side), the core wires 22 can be joined to each other while maintaining the positional relationship between the two electric wires 20 and 20. It is equipped with a tool 15.

As shown in FIGS. 1 and 2, the horn 12 is fixed to the base 11 and arranged on the lower side, and the upper surface 12a thereof is an ultrasonic vibration applying surface. Further, the anvil 13 arranged on the upper side is provided so as to be able to move up and down with respect to the lower horn 12 via an elevating mechanism (not shown), and the lower surface 13b thereof serves as a pressure surface for receiving the object to be machined. There is.

The receiving jig 15 arranged on the base 11 on the anvil 13 side is a rod-shaped jig 15 that is supported up and down via a compression coil spring 16 as a urging means housed in the hole portion 11a provided in the base 11. It has a jig body 15a. Further, the receiving jig 15 has an electric wire receiving plate 15b which is horizontally attached to the upper part of the jig main body 15a and holds a positional relationship between the two electric wires 20 and 20 on which one electric wire 20 to be controlled is placed. ing. The electric wire receiving plate 15b moves up and down as the anvil 13 moves up and down. That is, the anvil 13 descends and presses the core wire 22 of one of the electric wires 20 placed on the electric wire receiving plate 15b against the horn 12, and at the same time, the electric wire receiving plate 15b also descends together with the one electric wire 20. The receiving jig 15 is designed to be lowered by lowering the electric wire receiving plate 15b on which the one electric wire 20 is placed by the pressing force of the electric wire 20, but the anvil 12 is moved up and down. It may be possible to move in the vertical direction in conjunction with the elevating mechanism.

Each electric wire 20 arranged on the horn 12 side and the anvil 13 side has a core wire (conductor) 22 composed of a plurality of strands 22a exposed from the insulating coating 21 on the one end 20a side. Then, in the two electric wires 20 and 20, as shown in FIGS. 1 and 3, the core wires 22 are butted against each other, or as shown in FIGS. 5 and 6, the core wires 22 are oriented in the same direction. In the combined state, the horn 12 and the anvil 13 are bonded by ultrasonic bonding. Further, the materials of the core wires 22 to which the two electric wires 20 and 20 are joined are basically different materials, and if they are the same material, the wire diameters are different. Therefore, it is preferable that the core wire 22 is different in at least one of the material and the size. Further, the material of the core wire 22 may be, for example, aluminum, aluminum alloy, copper, copper alloy, or copper plated with tin, and may be a stranded wire or a single core wire.

Next, the ultrasonic bonding of the core wires 22 of the two different types of electric wires 20 and 20 by the ultrasonic bonding device 10 of the first embodiment will be described.

First, as shown in FIGS. 1 and 2, one electric wire 20 whose arrangement is to be controlled is placed and set on the electric wire receiving plate 15b of the receiving jig 15 arranged on the anvil 13 side. By this set, the positional relationship between one electric wire 20 whose arrangement is to be controlled and the hard electric wire whose core wire 22 is placed on the upper surface 12a of the horn 12 and the other electric wire 20 having a large electric wire size is maintained.

Next, when the anvil 13 is lowered as shown in FIGS. 3 and 4 while the positional relationship between the two electric wires 20 and 20 is maintained, the anvil 13 horns the core wire 22 of one electric wire 20. Press against the upper surface 12a side of. Further, at the same time as the pressing of the anvil 13, the electric wire receiving plate 15b of the receiving jig 15 descends together with the one electric wire 20 against the urging force of the compression coil spring 16. At this time, the core wires 22 are joined by ultrasonic bonding by ultrasonic vibration of the horn 12 and pressurization of the anvil 13.

During the above ultrasonic bonding, ultrasonic vibration energy oscillated from the upper surface 12a, which is the surface for applying ultrasonic vibration of the horn 12, is propagated toward the anvil 13, and each core wire is formed on the lower surface 13b, which is the pressurized surface of the anvil 13. 22 are pressurized together. By this ultrasonic bonding, as shown in FIGS. 3 and 4, the core wires 22 of two different types of electric wires 20 and 20 which are butted and arranged can be bonded to each other in an appropriate state. In this way, since the core wires 22 can be joined to each other in an appropriate state, it is possible to secure stable mechanical performance such as strength of the joint and electrical performance such as continuity of the joint.

Further, as shown in FIGS. 5 and 6, when joining the core wires 22 to each other by aligning the two different types of electric wires 20 and 20 in the same direction, the receiving jig 15 arranged on the anvil 13 side is used. .. By using this, it is possible to obtain the same action / effect as in the case where two different types of electric wires 20 and 20 are butted and joined. In this case, one electric wire 20 is set on the upper side of the electric wire receiving plate 15b of the jig 15, and the other electric wire 20 having a large hard electric wire / electric wire size is set on the lower side of the electric wire receiving plate 15b of the jig 15. To join.

Further, as shown in FIGS. 7 and 8, if a U-shaped wire receiving plate 15B is used instead of the flat wire receiving plate 15b of the receiving jig 15 arranged on the anvil 13 side, the arrangement is desired to be controlled. One of the electric wires 20 can be reliably placed and set without dropping.

FIG. 9 is a schematic front view showing an example of a state before two electric wires are butted and bonded by the ultrasonic bonding apparatus according to the second embodiment of the present invention. FIG. 10 is a cross-sectional view taken along the line XX in FIG. FIG. 11 is a schematic front view showing a state in which two electric wires are butted and joined. FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG. FIG. 13 is a schematic front view showing a state before joining two electric wires in the same direction in another form. FIG. 14 is a schematic front view showing a state in which two electric wires are joined in the same direction in another form.

In the ultrasonic bonding device 10A of the second embodiment, the receiving jig 18 is arranged on the base 11 on the side where the electric wire 20 is pressed by the horn 12 (hereinafter referred to as the horn 12 side), which is the anvil of the first embodiment. It is different from the one in which the receiving jig 15 is arranged on the base 11 on the 13 side. Since the other configurations are the same as those in the first embodiment, the same components are designated by the same reference numerals and detailed description thereof will be omitted.

In the ultrasonic bonding device 10A of the second embodiment, the receiving jig 18 arranged on the base 11 on the horn 12 side has a plate-shaped jig body 18a fixed to the base 11. Further, the receiving jig 18 is horizontally attached to the upper part of the jig main body 18a, and the electric wire receiving plate 18b on which one electric wire 20 to be controlled is placed and the positional relationship between the two different types of electric wires 20 and 20 is maintained. have. The upper surface of the electric wire receiving plate 18b and the upper surface (ultrasonic vibration applying surface) 12a of the horn 12 are located at the same position (same height).

Next, the ultrasonic bonding of the core wires 22 of the two different types of electric wires 20 and 20 by the ultrasonic bonding device 10A of the second embodiment will be described.

First, as shown in FIGS. 9 and 10, a hard electric wire whose arrangement is to be controlled and the other electric wire 20 having a large electric wire size whose arrangement is to be controlled are placed and set on the electric wire receiving plate 18b of the receiving jig 18 fixed to the horn 12 side. .. By this set, the positional relationship between the hard electric wire whose arrangement is to be controlled and the other electric wire 20 having a large electric wire size and the one electric wire 20 arranged below the anvil 13 is maintained.

Next, when the anvil 13 is lowered as shown in FIGS. 11 and 12 while the positional relationship between the two electric wires 20 and 20 is maintained, the anvil 13 horns the core wire 22 of one electric wire 20. Press against the upper surface 12a side of. At this time, the core wires 22 are joined by ultrasonic bonding by ultrasonic vibration of the horn 12 and pressurization of the anvil 13. That is, the ultrasonic vibration energy oscillated from the upper surface 12a, which is the surface for applying ultrasonic vibration of the horn 12, is propagated toward the anvil 13, and the core wires 22 are pressurized by the lower surface 13b, which is the pressure surface of the anvil 13. .. By this ultrasonic bonding, as shown in FIGS. 11 and 12, each core wire 22 of two different types of electric wires 20 and 20 which are butted and arranged can be bonded to each other in an appropriate state. In this way, since the core wires 22 can be joined to each other in an appropriate state, it is possible to secure stable mechanical performance such as strength of the joint and electrical performance such as continuity of the joint.

Further, as shown in FIGS. 13 and 14, when joining the core wires 22 to each other by aligning the two different types of electric wires 20 and 20 in the same direction, the receiving jig 18 arranged on the horn 12 side is used. .. By using this, it is possible to obtain the same action / effect as in the case where two different types of electric wires 20 and 20 are butted and joined. In this case, one electric wire 20 is set on the upper side of the electric wire receiving plate 18b of the jig 18, and the other electric wire 20 having a large hard electric wire / electric wire size is set on the lower side of the electric wire receiving plate 18b of the jig 18. To join.

FIG. 15 is a schematic front view showing an example of a state before butt-bonding three electric wires of different types in the ultrasonic bonding apparatus according to the third embodiment of the present invention.

The ultrasonic bonding device 10B of the third embodiment is different from that of the first and second embodiments in that the receiving jigs 15 and 18 are arranged on both sides of the anvil 13 side and the horn 12 side of the base 11. Is different. Since the other configurations are the same as those of the first and second embodiments, the same components are designated by the same reference numerals and detailed description thereof will be omitted.

In the ultrasonic bonding device 10B of the third embodiment, the arrangement of a plurality of different types of electric wires 20 is controlled by changing the heights of the receiving jig 15 on the anvil 13 side and the receiving jig 18 on the horn 12 side. You can do it. That is, the position of the electric wire receiving plate 15b of the receiving jig 15 on the anvil 13 side is set higher than the position of the electric wire receiving plate 18b of the receiving jig 18 on the horn 12 side.

Next, bonding by ultrasonic bonding of the core wires 22A, 22B, 22C of three different types of electric wires 20 by the ultrasonic bonding device 10B of the third embodiment will be described.

First, an electric wire 20 having a large-diameter core wire (conductor) 22A made of a plurality of hard copper wires 22a is set on the lower side of the electric wire receiving plate 18b of the receiving jig 18, and is placed on the upper side of the electric wire receiving plate 18b. An electric wire 20 having a small-diameter core wire 22B made of a plurality of hard copper wires 22a is set. Further, an electric wire 20 having a large diameter (same diameter as the copper core wire 22A) core wire (conductor) 22C made of a plurality of soft aluminum wire wires 22a is set on the upper side of the electric wire receiving plate 15b of the receiving jig 15. ..

By lowering the anvil 13 from the above set state and pressurizing the core wires 22A, 22B, 22C between the lower surface 13b of the anvil 13 and the upper surface 12a of the horn 12 while applying ultrasonic vibration, each core wire 22A , 22B, 22C can be reliably joined to each other.
That is, if the aluminum core wire 22C or the small size core wire 22B is placed on the upper surface 12a of the horn 12, overwelding occurs. However, the core wires 22A made of copper and having a large cross-sectional area are placed on the upper surface 12a of the horn 12, and the core wires 22C made of aluminum and having a large cross-sectional area are arranged on the lower surface 13b side of the anvil 13, so that the core wires 22A, 22B, 22C can be separated from each other. It can be joined without damaging it. By this joining, the core wires 22A, 22B, 22C of a wide variety of three electric wires 20 can be joined together in an appropriate state, and the mechanical performance such as the strength of the stable joint and the electricity such as the continuity of the joint can be obtained. Performance can be ensured. That is, as compared with the case of conventional ultrasonic bonding, it is possible to minimize the decrease in strength of the bonded portions of the core wires 22A, 22B and 22C, and to obtain a stable conduction state.

Although the present embodiment has been described above, the present embodiment is not limited to these, and various modifications can be made within the scope of the gist of the present embodiment.

That is, according to each of the above-described embodiments, a plurality of electric wires are butted and joined, and a plurality of electric wires are joined in the same direction. A conductor exposed from the insulating film in the middle of the other electric wire may be joined.

10,10A, 10B ultrasonic bonding device 11 base 12 horn 12a upper surface (ultrasonic vibration applying surface)
13 Anvil 15 Anvil side receiving jig 15b, 15B Electric wire receiving plate 18 Horn side receiving jig 18b Electric wire receiving plate 20 Electric wire 22, 22A, 22B, 22C Core wire (conductor)

Claims (5)

An ultrasonic bonding device that bonds each conductor of at least two different types of electric wires between a horn for ultrasonic bonding and an anvil by ultrasonic bonding.
An ultrasonic bonding device provided with a receiving jig on at least one side of the horn and the anvil that enables bonding between the conductors while maintaining the positional relationship between the at least two different types of electric wires. The horn is fixed to the base and
The ultrasonic bonding apparatus according to claim 1, wherein the anvil is provided so as to be able to move up and down with respect to the horn fixed to the base. A receiving jig is placed on the base on the side where the electric wire is held by the anvil.
The receiving jig has a wire receiving plate that maintains the positional relationship between at least two different types of wires.
The ultrasonic bonding device according to claim 2, wherein the electric wire receiving plate moves up and down with the raising and lowering of the anvil. The receiving jig is fixed to the base on the side where the electric wire is held by the horn.
The second aspect of the invention, wherein the receiving jig has a wire receiving plate that holds the position of one of at least two different types of wires at the same position as the ultrasonic vibration applying surface of the horn. Ultrasonic bonding device. Receiving jigs are arranged on both sides of the side that holds the electric wire with the horn of the base and the side that holds the electric wire with the anvil.
The receiving jig fixed to the base on the side that holds the electric wire by the horn holds the electric wire having a conductor made of hard metal or a large conductor among at least two different types of electric wires in a predetermined position. , The ultrasonic bonding apparatus according to claim 2.

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