JP2024004682A - Jig for ultrasonic junction devices and ultrasonic junction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for ultrasonic junction devices which is capable of easily changing an application direction of ultrasonic vibration to a junction target portion without being removed from a device and reset, and an ultrasonic junction device.

SOLUTION: A jig 10 for ultrasonic junction devices comprises a first holding section 11, a second holding section 12 and a connection section 13. The first holding section 11 and the second holding section 12 are provided relatively and freely rotatable around an axis Xa with respect to an anvil 2 and a horn 3 which are joined to a junction target position P by applying ultrasonic waves thereto while holding the junction target portion P therebetween in a junction region L. The jig 10 for ultrasonic junction devices is switchable between a first posture S1 and a second posture S2 with respect to the anvil 2 and the horn 3 in the junction region L by rotating the junction target portion P around the axis Xa together with a first wire bundle Wt1 and a second wire bundle Wt2 in a holding state where the first holding section 11 holds the first wire bundle Wt1 and the second holding section 12 holds the second wire bundle Wt2.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a jig for an ultrasonic bonding device and an ultrasonic bonding device.

Conventionally, there is an ultrasonic bonding device that uses ultrasonic vibration to bond conductors of electric wires together. In ultrasonic bonding equipment, ultrasonic vibrations are transmitted in one direction from the horn to the anvil, so it is easy to bond when the horn and anvil face each other (vertical direction), but it is easier to bond in the direction perpendicular to the opposing direction (horizontal direction). Therefore, it tends to be difficult to join (for example, see Patent Document 1). Furthermore, since the amount of energy on the horn side is greater than on the anvil side, there is a tendency for bonding to occur more easily. Therefore, in the ultrasonic bonding apparatus, after applying ultrasonic vibration once, the conductor bundle is rotated by 90 degrees, and ultrasonic vibration is applied again to the conductor bundle from a direction 90 degrees different in direction.

JP2012-49080A

By the way, in an ultrasonic bonding apparatus, after applying ultrasonic vibration once, it is necessary to rotate the conductor bundle by 90 degrees and apply ultrasonic vibration again from a direction 90 degrees different from the conductor bundle. There is room for improvement in that the joining work becomes complicated.

The present invention has been made in view of the above-mentioned problems, and provides a jig for an ultrasonic welding device that can easily change the direction of application of ultrasonic vibration to the welding target site without removing it from the device and resetting it. and an ultrasonic bonding device.

In order to achieve the above object, a jig for an ultrasonic bonding device according to the present invention provides a first gripping device that can grip a part of the first electric wire including the first core wire along the axis. and a second gripping part capable of gripping a part of the second electric wire including the second core wire along the axis, the first gripping part and the second gripping part. is to apply ultrasonic waves to the welding target region formed by overlapping one end of the first core wire and the other end of the second core wire while sandwiching the welding target region within the welding region. The first gripping portion grips the first electric wire, and the second gripping portion grips the second electric wire. In the gripped state, the part to be welded together with the first electric wire and the second electric wire is rotated around the axis to take a first attitude with respect to the joint part in the welding area, and from the first attitude to the axis. It is characterized in that it can be switched to a second posture rotated around the periphery.

According to the ultrasonic welding device jig and the ultrasonic welding device according to the present invention, it is possible to easily change the direction of application of ultrasonic vibration to the welding target site without removing it from the device and resetting it. be effective.

FIG. 1 is a schematic plan view showing a schematic configuration of an ultrasonic bonding apparatus according to an embodiment. FIG. 2 is a schematic perspective view showing a schematic configuration of a jig for an ultrasonic bonding apparatus according to an embodiment. FIG. 3 is a schematic perspective view showing a schematic configuration of a jig for an ultrasonic bonding apparatus according to an embodiment. FIG. 4 is a schematic plan view showing a schematic configuration of the ultrasonic bonding apparatus according to the embodiment. FIG. 5 is a schematic diagram illustrating the operation of joining target parts to be joined by the joining section of the embodiment. FIG. 6 is a schematic diagram illustrating a joining operation of joining target parts by the joining section of the embodiment. FIG. 7 is a schematic diagram illustrating the joining operation of the joining target site by the joining section of the embodiment. FIG. 8 is a schematic diagram illustrating the joining operation of the joining target site by the joining section of the embodiment. FIG. 9 is a schematic diagram illustrating the gripping operation of the gripping section in the embodiment. FIG. 10 is a schematic perspective view showing a schematic configuration of a jig for an ultrasonic bonding apparatus according to a modification of the embodiment. FIG. 11 is a schematic perspective view showing a schematic configuration of a jig for an ultrasonic bonding apparatus according to a modification of the embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an ultrasonic bonding device jig and an ultrasonic bonding device according to the present invention will be described in detail below with reference to the drawings. Note that the present invention is not limited to the following embodiments. That is, the components in the following embodiments include those that can be easily imagined by those skilled in the art or are substantially the same, and various omissions, substitutions, and changes may be made without departing from the gist of the invention. Can be done.

In the following description, the illustrated X direction is the axial direction X of the ultrasonic bonding device and the jig for the ultrasonic bonding device in this embodiment. The Y direction is the depth direction Y of the ultrasonic bonding device and the jig for the ultrasonic bonding device in this embodiment, and is a direction perpendicular to the axial direction X. The Z direction is the vertical direction Z of the ultrasonic bonding device and the jig for the ultrasonic bonding device in this embodiment, and is a direction perpendicular to the axial direction X and the depth direction Y. Note that the vertical direction Z is, for example, along the vertical direction, but is not limited thereto.

[Embodiment]
The ultrasonic bonding apparatus 1 of the present embodiment shown in FIGS. 1 and 4 includes a first electric wire W1 and a second electric wire W2 held by an ultrasonic bonding apparatus jig (hereinafter also simply referred to as "jig") 10. Ultrasonic vibrations are applied to each of the first core wire Wc1 and second core wire Wc2 to join the core wires together. Further, the ultrasonic bonding device 1 can bond core wires of a first wire bundle Wt1 in which a plurality of first electric wires W1 are bundled and a second wire bundle Wt2 in which a plurality of second electric wires W2 are bundled. . The jig 10 is for gripping the first wire bundle Wt1 and the second wire bundle Wt2.

Here, the first electric wire W1 is configured to include, for example, a linear first core wire Wc1 having conductivity and a first covering portion Wr1 having insulation properties that covers the outside of the first core wire Wc1. The second electric wire W2 is configured to include, for example, a linear second core wire Wc2 having conductivity and a second covering portion Wr2 having insulation properties that covers the outside of the second core wire Wc2. The first electric wire W1 and the second electric wire W2 are insulated electric wires each having a core wire covered with a covering portion.

Each of the first core wire Wc1 and the second core wire Wc2 is formed by bundling a plurality of conductive metal wires, such as copper, copper alloy, aluminum, and aluminum alloy. The first core wire Wc1 and the second core wire Wc2 may each be a twisted core wire obtained by twisting a plurality of strands together. The first covering part Wr1 and the second covering part Wr2 are electric wire coverings that cover the outer peripheral sides of the first core wire Wc1 and the second core wire Wc2. The first covering part Wr1 and the second covering part Wr2 are made of, for example, an insulating resin material (PP, PVC, crosslinked PE, etc., which is appropriately selected in consideration of abrasion resistance, chemical resistance, heat resistance, etc.). It is formed by extrusion molding etc.

In the first electric wire W1, the first sheathing portion Wr1 is stripped off at least at one end of the first core wire Wc1, and one end of the first core wire Wc1 is exposed from the first sheathing portion Wr1. . In the second electric wire W2, the second sheathing portion Wr2 is peeled off at least at the other end of the second core wire Wc2, and the other end of the second core wire Wc2 is exposed from the second sheathing portion Wr2. .

The ultrasonic bonding apparatus 1 includes an anvil 2 and a horn 3 that constitute a bonding section, and a jig 10.

Here, ultrasonic bonding refers to ultrasonic vibration applied to the welding target part P by the horn 3 that constitutes the bonding part of the ultrasonic bonding device 1, as shown in FIGS. 2, 3, 5, and 8. This is metal-to-metal bonding performed using the applied ultrasonic vibrations. For example, when joining the first electric wire W1 and the second electric wire W2, the welding target part P connects one end of the first core wire Wc1 and the other end of the second core wire Wc2 along the axial direction They are formed by stacking them against each other. In addition, when joining the first wire bundle Wt1 and the second wire bundle Wt2, the welding target part P connects one end of the bundle of first core wires Wc1 and the other end of the bundle of second core wires Wc2 to an axis. They are formed by stacking them against each other along the direction X. In this case, the part to be welded P has a plurality of exposed core wires sandwiched between the anvil 2 and the horn 3 in a state where they are overlapped, and the horn 3 applies ultrasonic vibration to the core wires in the overlapping plurality. will be added. As a result, the first electric wire bundle Wt1 and the second electric wire bundle Wt2 undergo plastic deformation as the strands forming the stacked core wires rub against each other due to ultrasonic vibration, and are joined in a solid state.

In the ultrasonic welding apparatus 1, when the first wire bundle Wt1 and the second wire bundle Wt2 are gripped by the jig 10, the anvil 2 is placed at one side in the depth direction Y intersecting the axial direction X of the welding target region P. placed on the side. The anvil 2 is configured to be movable in the depth direction Y and the vertical direction Z together with the horn 3. As shown in FIGS. 5 and 8, when the welding target part P is in the welding area L formed by the horn 3 and the anvil 2, the anvil 2 faces (directly faces) the horn 3 in the vertical direction Z. do. When the welding target part P is rotated around the axis Xa together with the first wire bundle Wt1 and the second wire bundle Wt2 by the jig 10, the anvil 2 is placed on the upper side in the vertical direction Z and in the depth direction, as shown in FIG. It is configured to move to the back side of Y. Further, when the rotation of the part to be welded P by the jig 10 is completed, the anvil 2 is positioned on the lower side in the up-down direction Z so as to directly face the horn 3 in the up-down direction Z, as shown in FIG. It is configured to move toward the front side in the depth direction Y.

In the ultrasonic bonding apparatus 1, the horn 3 is located at the other end in the depth direction Y intersecting the axial direction placed on the side. As shown in FIGS. 5 and 8, when the welding target part P is in the welding area L formed by the horn 3 and the anvil 2, the horn 3 faces (directly faces) the anvil 2 in the vertical direction Z. do. In this case, the horn 3 applies ultrasonic vibration to the welding target part P in a state where the welding target part P is held between the horn 3 and the anvil 2 . When the part to be welded P is rotated around the axis Xa together with the first wire bundle Wt1 and the second wire bundle Wt2 by the jig 10, the horn 3 is placed on the lower side in the vertical direction Z and in the depth direction, as shown in FIG. It is configured to move toward the front side of Y. Further, when the rotation of the part to be welded P by the jig 10 is completed, the horn 3 is placed on the upper side of the up-down direction Z so as to directly face the anvil 2 in the up-down direction Z, as shown in FIG. It is configured to move to the back side in the depth direction Y.

The jig 10 has a first gripping part 11, a second gripping part 12, and a connecting part 13. The jig 10 is formed into a C-shape or a U-shape by a first gripping part 11, a second gripping part 12, and a connecting part 13. The first grip part 11 and the second grip part 12 are formed in the same shape. The jig 10 is attached to a rotation mechanism (not shown) in the ultrasonic bonding apparatus 1, and is configured to be freely rotatable around the axis Xa. The jig 10 is made of, for example, a synthetic resin material, a metal material, or the like that has insulation and elasticity.

The first gripping portion 11 is a portion that grips the first wire bundle Wt1. The first gripping part 11 is formed in a columnar shape extending in a direction intersecting the axial direction 13 is connected to the second gripping part 12. The first gripping groove 11a is dug from the upper side toward the lower side of the first gripping part 11 and is formed so as to penetrate in the axial direction X. The first gripping groove 11a has an irregular serrated shape when viewed from the axial direction X. One first electric wire W1 or first electric wire bundle Wt1 is inserted into the first gripping groove 11a from the upper side in the vertical direction Z toward the lower side. For example, when the first wire bundle Wt1 is inserted into the first gripping groove 11a, the end 11b on one side in the depth direction Y of the first gripping part 11 is elastically deformed downward in the vertical direction Z (Fig. 9). The first gripping section 11 grips the first electric wire bundle Wt1 or the first electric wire W1 by the elastic reaction force of the end portion 11b.

The second gripping portion 12 is a portion that grips the second wire bundle Wt2. The second gripping portion 12 is formed in a columnar shape extending in a direction intersecting the axial direction 13 to the first gripping section 11 . The second gripping groove 12a is formed to extend through the second gripping portion 12 in the axial direction X by digging downward from the upper side. The second gripping groove 12a has an irregular serrated shape when viewed from the axial direction X. One second electric wire W2 or second electric wire bundle Wt2 is inserted into the second gripping groove 12a from the upper side in the vertical direction Z toward the lower side. For example, when the second wire bundle Wt2 is inserted into the second gripping groove 12a, the end 12b on one side in the depth direction Y of the second gripping part 12 is elastically deformed downward in the vertical direction Z (Fig. 9). The second grip part 12 grips the second electric wire bundle Wt2 or the second electric wire W2 by the elastic reaction force of the end part 12b. The first grip groove 11a and the second grip groove 12a are formed at the same position in the depth direction Y when the jig 10 is viewed from the axial direction X.

The connecting portion 13 is a portion that connects the first gripping portion 11 and the second gripping portion 12.

In the jig 10 of this embodiment, the first gripping part 11 grips the first wire bundle Wt1 and the second gripping part 12 grips the second wire bundle Wt2. 2. Rotate the part to be welded P together with the wire bundle Wt2 around the axis Xa to a first attitude S1 with respect to the joint part (anvil 2, horn 3) in the welding area L, and rotate around the axis Xa from the first attitude S1. The position is then switched to the second posture S2. The first posture S1 and the second posture S2 are the postures of the part to be welded P when the jig 10 rotates around the axis Xa, as shown in FIG. The first posture S1 is a posture rotated by 90 degrees around the axis Xa with respect to the second posture S2.

As shown in FIGS. 1 and 2, when the jig 10 is in the first posture S1 and viewed from the axial direction located along. At this time, as shown in FIG. 5, in the first posture S1, when viewed from the axial direction Ultrasonic vibrations are applied upward from the side.

Next, when the anvil 2 and the horn 3 are each separated from the welding target site P and retracted to a predetermined position, the jig 10 rotates 90 degrees around the axis Xa (FIG. 6). As shown in FIGS. 3 and 4, when the jig 10 is in the second attitude S2 and viewed from the axial direction located along. When the jig 10 rotates 90 degrees around the axis Xa, the welding target part P switches from the first attitude S1 to the second attitude S2. In other words, the direction of the part P to be welded changes around the axis Xa by the rotation of the jig 10. As shown in FIG. 8, when viewed from the axial direction Ultrasonic vibrations are applied upward from. Thereby, the jig 10 can attach two different parts to the welding target part P together with the first wire bundle Wt1 and the second wire bundle Wt2 without having to remove the welding target part P from the jig 10, change the orientation, and reattach the welding target part P. Ultrasonic waves can be applied at different timings depending on the direction. Moreover, the jig 10 is in a gripping state in which the first gripping part 11 grips the first electric wire bundle Wt1 and the second gripping part 12 grips the second electric wire bundle Wt2. It becomes possible to rotate the part to be welded P together with the bundle Wt2 around the axis Xa. Thereby, the ultrasonic bonding apparatus 1 can easily change the direction of application of ultrasonic vibration to the welding target site P without removing the jig 10 from the ultrasonic bonding apparatus 1 and resetting it.

As explained above, the ultrasonic bonding device jig 10 according to the present embodiment includes the first gripping part 11, the second gripping part 12, and the connecting part 13. The first gripping part 11 and the second gripping part 12 have an axis line with respect to an anvil 2 and a horn 3, which are bonded by applying ultrasonic waves to the welding target part P while sandwiching the welding target part P in the welding area L. It is provided so as to be relatively rotatable around Xa. The ultrasonic bonding device jig 10 is configured to hold the first wire bundle Wt1 and the second wire bundle Wt2 in a gripping state in which the first gripping portion 11 grips the first wire bundle Wt1 and the second gripping portion 12 grips the second wire bundle Wt2. By rotating the part to be welded P together with the second wire bundle Wt2 around the axis Xa, it is possible to switch between the first attitude S1 and the second attitude S2 with respect to the anvil 2 and the horn 3 in the welding region L.

With the above configuration, the ultrasonic bonding device jig 10 can easily change the direction of application of ultrasonic vibration to the welding target site P without removing the jig 10 from the ultrasonic bonding device 1 and resetting it. Can be done.

In addition, the ultrasonic welding device jig 10 according to the present embodiment sandwiches the welding target part P within the welding region L between the anvil 2 and the horn 3, and the second posture S2 is the first posture. This is a posture rotated by 90 degrees around the axis Xa with respect to S1. As a result, even though the position of the welding target part P is within the joining area L between the anvil 2 and the horn 3, the anvil 2 and the horn 3 can be attached to the welding target part P without rotating around the axis Xa. This makes it possible to apply ultrasonic waves from directions that differ by 90 degrees.

Further, the ultrasonic bonding device 1 according to the present embodiment includes an ultrasonic bonding device jig 10, an anvil 2 and a horn 3 that constitute a bonding section. Thereby, the ultrasonic bonding apparatus 1 can easily change the direction of application of ultrasonic vibration to the welding target site P without removing the jig 10 from the ultrasonic bonding apparatus 1 and resetting it.

In the embodiment described above, in the jig 10, the first gripping part 11 and the second gripping part 12 are each made of one member, but the present invention is not limited to this. 10 and 11 are schematic perspective views showing a schematic configuration of a jig for an ultrasonic bonding apparatus according to a modification of the embodiment. A jig 10A for an ultrasonic bonding device according to a modified example differs from the jig 10 for an ultrasonic bonding device in that it includes a first gripping member 15 and a second gripping member 16.

The ultrasonic bonding device jig 10A (hereinafter also simply referred to as the "jig 10A") slides the second gripping member 16 relative to the first gripping member 15 to separate the first wire bundle Wt1 and the second wire. The bundle Wt2 is held individually.

The first gripping member 15 includes a first extending portion 21 , a second extending portion 22 , and a connecting portion 23 . The first gripping member 15 is formed into a C-shape or a U-shape by the first extending portion 21 , the second extending portion 22 , and the connecting portion 23 .

The first extending portion 21 and the second extending portion 22 are each formed in a plate shape extending in the depth direction Y that intersects the axial direction X of the jig 10A. A recess 21 a on the existing part side and a recess 22 a on the second extension part side are provided, and the other end side is connected to each other by a connecting part 23 . One end of the first extending part 21 and the second extending part 22 in the depth direction Y is each divided into two parts. The first extending portion 21 is divided into two, each having a first extending portion side recess 21a. Further, the second extending portion 22 divided into two has a second extending portion side recess 22a, respectively.

The first extending part side recess 21a and the second extending part side recess 22a are both open toward the other side in the depth direction Y of the jig 10A, and the first electric wire bundle Wt1 and the second electric wire bundle Wt2 are accommodated from the other side in the depth direction Y toward one side.

The second gripping member 16 includes a first extending portion 31 , a second extending portion 32 , and a connecting portion 33 . The second gripping member 16 is formed into a C-shape or a U-shape by the first extending portion 31 , the second extending portion 32 , and the connecting portion 33 .

The first extending portion 31 and the second extending portion 32 are each formed in a columnar shape extending in the depth direction Y that intersects the axial direction A section side recess 31 a and a second extension section side recess 32 a are provided, and the other end side is connected to each other by a connecting section 33 .

The first extension part side recess 31a and the second extension part side recess 32a are both open toward one side in the depth direction Y of the jig 10A, and the first electric wire bundle Wt1 and the second electric wire bundle Wt2 are accommodated from one side to the other in the depth direction Y. The first extending portion side recess 31a faces the first extending portion side recess 21a in the depth direction Y in an assembled state in which the second gripping member 16 is assembled to the first gripping member 15. The second extension-side recess 32a faces the second extension-side recess 22a in the depth direction Y in the assembled state.

Next, a method of holding the first wire bundle Wt1 and the second wire bundle Wt2 using the jig 10A according to the modification will be described. As shown in FIG. 10, in the assembled state, the operator moves the second gripping member 16 to the other side in the depth direction Y with respect to the first gripping member 15, thereby removing the first extension-side recess 31a. The first extension-side recess 21a, the second extension-side recess 32a, and the second extension-side recess 22a are spaced apart in the depth direction Y, respectively.

Next, the operator stores the first wire bundle Wt1 in the first extending portion side recess 31a, stores the second wire bundle Wt2 in the second extending portion side recess 32a, and then stores the plurality of first core wires Wc1. By overlapping the end portions of the second core wire Wc2 and the second core wire Wc2, a joining target portion P is formed. Next, the operator slides the second gripping member 16 to one side in the depth direction Y with respect to the first gripping member 15, so that the jig 10A is connected to the first extension side recess 31a and the first gripping member 16. The extending portion side recess 21a approaches in the depth direction Y to form a first gripping portion 11A, and the first gripping portion 11A grips the first wire bundle Wt1. At the same time, in the jig 10A, the second extending part side recess 32a and the second extending part side recess 22a approach each other in the depth direction Y to form a second gripping part 12A, and the second gripping part 12A forms a second gripping part 12A. Grip the wire bundle Wt2. Thereby, the operator can easily perform the work of fixing the first wire bundle Wt1 and the second wire bundle Wt2 to the jig 10A with a simple operation.

In addition, in the said embodiment, although the joining target part P is formed by each core wire bundle of 1st electric wire bundle Wt1 and 2nd electric wire bundle Wt2, it is not limited to this. In this case, it may be formed by each core wire of the first electric wire W1 and the second electric wire W2. Moreover, it may be formed by each core wire bundle of the 1st electric wire bundle Wt1 (or the 1st electric wire W1) and the 2nd electric wire W2 (or the 2nd electric wire bundle Wt2). In addition, in the above embodiment, the welding target site P shown in FIGS. 5 to 8 has a plurality of first core lines Wc1 and second core lines Wc2 arranged along the vertical direction Z and the depth direction Y, but in reality, it is not shown in the drawings. Needless to say, they are not arranged as regularly as .

1 Ultrasonic bonding device 2 Anvil 3 Horn 10 Ultrasonic bonding device jig 11 First gripping portion 12 Second gripping portion P Part to be welded S1 First posture S2 Second posture W1 First electric wire W2 Second electric wire Wc1 First Core wire Wc2 Second core wire

Claims (3)

a first gripping part capable of gripping a part of the first electric wire including the first core wire along the axis;
a second gripping part capable of gripping a part of the second electric wire including the second core wire along the axis;
The first gripping part and the second gripping part are
Applying ultrasonic waves to the welding target region formed by overlapping one end of the first core wire and the other end of the second core wire while sandwiching the welding target region within the welding region. It is provided so as to be rotatable relative to the joint part to be joined about the axis line,
In a gripping state in which the first gripping part grips the first electric wire and the second gripping part grips the second electric wire, the welding target region is moved around the axis along with the first electric wire and the second electric wire. and a second posture in which the first posture is rotated around the axis from the first posture with respect to the joint portion in the bonding region.
A jig for an ultrasonic bonding device characterized by: The joint portion is
It is composed of an anvil and a horn, and the part to be joined is sandwiched within the joining area between the anvil and the horn,
The second posture is a posture rotated by 90 degrees around the axis with respect to the first posture.
The jig for an ultrasonic bonding device according to claim 1. A first gripping part capable of gripping a part of the first electric wire including the first core wire along the axis; and a part of the second electric wire including the second core wire along the axis. a jig for an ultrasonic bonding device, which has a second gripping part that can be gripped along the
Applying ultrasonic waves to the welding target region formed by overlapping one end of the first core wire and the other end of the second core wire while sandwiching the welding target region within the welding region. a joint to be joined;
The first gripping part and the second gripping part are
Applying ultrasonic waves to the welding target region formed by overlapping one end of the first core wire and the other end of the second core wire while sandwiching the welding target region within the welding region. It is provided so as to be rotatable relative to the joint part to be joined about the axis,
In a gripping state in which the first gripping part grips the first electric wire and the second gripping part grips the second electric wire, the welding target region is moved around the axis along with the first electric wire and the second electric wire. and a second posture in which the first posture is rotated around the axis from the first posture with respect to the joint portion in the bonding region.
An ultrasonic bonding device characterized by:

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