An auxiliary device for conveniently cutting off excess aluminum wire and copper wire at the knife edge

Abstract

The utility model discloses an auxiliary device for conveniently cutting off the excess aluminum wire and copper wire on the blade, comprising: a copper plate fixing seat, a cylinder pressure plate and a parallel cylinder, wherein the copper plate is arranged on the copper plate fixing seat, and the copper plate fixing seat moves in a first direction; the cylinder pressure plate is parallel to the copper plate fixing seat, and the cylinder pressure plate comprises: a bottom plate and a limit plate, a limit groove is formed between the limit plate and the bottom plate, the copper plate fixing seat is arranged in the limit groove, and the width of the limit groove is greater than the width of the copper plate fixing seat; the cylinder body of the parallel cylinder is fixedly arranged, and the piston rod of the parallel cylinder is connected to the copper plate fixing seat, and the piston rod drives the copper plate fixing seat to move in the limit groove along the first direction. The utility model adopts a parallel cylinder, which can better fix the DBC, provide a fixed tangent point surface carrier, and can also accurately obtain welding reliability test results. The utility model adopts a cylinder pressure plate, and fixes the tangent point surface by mechanical methods, which plays a good fixing role.

Description

Technical Field

[0001] The utility model relates to the technical field of power semiconductor module packaging, in particular to an auxiliary device for conveniently cutting off redundant aluminum wires and copper wires at a knife edge. Background Art

[0002] Aluminum wire and copper wire are widely used in the field of power semiconductor module packaging. After replacing the aluminum wire and copper wire, the knife edge will produce redundant bonding wires. The bonding wires play an important role in power transmission in the entire module. If the bonding wires are too long and connect different poles, it means a short circuit in the power module, which will affect the performance of the entire module and cause waste of manpower and costs.

[0003] In the industry, double-sided tape is used to fix the DBC (copper-clad ceramic substrate) on the fixture to cut off the excess aluminum wire. This can also play a certain role, but this method is a waste of manpower, because cutting points are often performed during bonding, so the DBC is replaced frequently; secondly, the use of double-sided tape to fix the DBC is not effective, and it affects the shear force detection data before and after the tool is replaced. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an auxiliary device for conveniently cutting off excess aluminum wire and copper wire at the knife edge.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An auxiliary device for conveniently cutting off excess aluminum wire and copper wire at a knife edge, comprising:

[0007] A copper plate fixing seat, wherein the copper plate fixing seat is a plate-shaped structure and moves in a first direction;

[0008] A cylinder pressure plate, the cylinder pressure plate is parallel to the copper plate fixing seat and is located below the copper plate fixing seat, the cylinder pressure plate comprises: a bottom plate, a side plate and a limit plate, a limit groove is formed between the side plate, the limit plate and the bottom plate, the copper plate fixing seat is arranged in the limit groove, and the width of the limit groove is greater than the width of the copper plate fixing seat;

[0009] A parallel cylinder, wherein the cylinder body of the parallel cylinder is fixedly arranged, the piston rod of the parallel cylinder is connected to the copper plate fixing seat, and the piston rod drives the copper plate fixing seat to move in the limiting groove along the first direction.

[0010] The above-mentioned auxiliary device for facilitating the cutting of excess aluminum wire and copper wire at the blade, wherein the cylinder pressure plate includes: the base plate, two side plates respectively arranged on both sides of the base plate and extending vertically upward, and the limit plate arranged at the end of each side plate, the two limit plates are arranged opposite to each other and extend towards each other, and the limit plate is parallel to the base plate.

[0011] The above-mentioned auxiliary device for facilitating the cutting of excess aluminum wire and copper wire on the blade, wherein the width of the copper plate fixing seat in the horizontal direction is greater than the spacing between the two limiting plates in the horizontal direction.

[0012] The above-mentioned auxiliary device for facilitating the cutting of excess aluminum wire and copper wire at the blade, wherein both sides of the copper plate fixing seat are also provided with limiting edges, the vertical width of the limiting edges is smaller than the vertical width of the side plate, and the limiting edges are perpendicular to the bottom plate.

[0013] The above-mentioned auxiliary device for facilitating the cutting of excess aluminum wire and copper wire at the blade also includes: a fixed seat, the cylinder body of the parallel cylinder is connected to the fixed seat, the copper plate fixed seat and the cylinder pressure plate are both arranged above the fixed seat, and one end of the fixed seat is connected to the cylinder pressure plate.

[0014] The above-mentioned auxiliary device for facilitating the cutting of excess aluminum wire and copper wire at the knife edge further includes: a manual clamp transition plate, the fixing seat is arranged on the manual clamp transition plate, and the fixing seat is connected to the manual clamp transition plate.

[0015] The above-mentioned auxiliary device for facilitating the cutting of excess aluminum wire and copper wire on the blade, wherein the fixed seat includes: a first fixed seat, the first fixed seat is arranged on the manual clamp transition plate and is perpendicular to the manual clamp transition plate, the cylinder body of the parallel cylinder is fixedly arranged on the first fixed seat, and the cylinder pressure plate is fixedly connected to one end of the first fixed seat.

[0016] The above-mentioned auxiliary device for facilitating the cutting of excess aluminum wire and copper wire on the blade, wherein the fixing seat includes: a second fixing seat, the second fixing seat is arranged on the manual clamp transition plate, the second fixing seat is connected to the first fixing seat and the second fixing seat is perpendicular to the first fixing seat, and the lower surface of the second fixing seat is against the upper surface of the manual clamp transition plate.

[0017] The above-mentioned auxiliary device for facilitating the cutting of excess aluminum wire and copper wire at the knife edge, wherein the fixing seat includes: a reinforcing plate, the reinforcing plate is triangular in shape, the reinforcing plate is respectively connected to the first fixing seat and the second fixing seat, and the reinforcing plate is respectively perpendicular to the first fixing seat and the second fixing seat.

[0018] The above-mentioned auxiliary device for facilitating the removal of excess aluminum wire and copper wire from the blade, wherein the first fixing seat is located in a first plane, the second fixing seat is located in a second plane, the reinforcing plate is located in a third plane, and the first plane, the second plane and the third plane are perpendicular to each other.

[0019] Due to the adoption of the above technology, the utility model has the following positive effects compared with the prior art:

[0020] (1) The utility model adopts parallel cylinders, which can better fix the DBC and provide a fixed cutting point surface carrier. At the same time, it can also accurately obtain the welding reliability test results before and after the tool is replaced.

[0021] (2) The utility model adopts a cylinder pressure plate to fix the tangent point surface mechanically, thereby achieving a good fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of an auxiliary device for conveniently cutting off excess aluminum wire and copper wire at a knife edge of the utility model.

[0023] In the attached drawings: 1. Copper plate fixing seat; 11. Limiting edge; 2. Cylinder pressure plate; 21. Bottom plate; 22. Side plate; 23. Limiting plate; 3. First fixing seat; 4. Manual fixture transition plate; 5. Second fixing seat; 6. Reinforcement plate; 7. Parallel cylinder. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention. Figure 1 This is a schematic diagram of the auxiliary device for conveniently cutting off the excess aluminum wire and copper wire of the knife edge of the utility model, see Figure 1 As shown, a preferred embodiment of an auxiliary device for facilitating the removal of excess aluminum wire and copper wire from a knife edge is shown, comprising: a copper plate fixing seat 1, a cylinder pressure plate 2 and a parallel cylinder 7, wherein the copper plate fixing seat 1 is a plate-shaped structure, and the copper plate fixing seat 1 moves in a first direction; the cylinder pressure plate 2 is parallel to the copper plate fixing seat 1 and is located below the copper plate fixing seat 1, and the cylinder pressure plate 2 comprises: a bottom plate 21, a side plate 22 and a limit plate 23, and a limit groove is formed between the side plate 22, the limit plate 23 and the bottom plate 21, and the copper plate fixing seat 1 is arranged in the limit groove, and the width of the limit groove is greater than the width of the copper plate fixing seat 1; the cylinder body of the parallel cylinder 7 is fixedly arranged, and the piston rod of the parallel cylinder 7 is connected to the copper plate fixing seat 1, and the piston rod drives the copper plate fixing seat 1 to move in the limit groove along the first direction.

[0025] In a preferred embodiment, the cylinder pressure plate 2 includes: a base plate 21, two side plates 22 extending vertically upward and respectively arranged on both sides of the base plate 21, and a limit plate 23 arranged at the end of each side plate 22, the two limit plates 23 are arranged opposite to each other and extend toward each other, and the limit plates 23 are parallel to the base plate 21.

[0026] In a preferred embodiment, the width of the copper plate fixing seat 1 in the horizontal direction is greater than the distance between the two limiting plates 23 in the horizontal direction.

[0027] In a preferred embodiment, limiting edges 11 are further provided on both sides of the copper plate fixing seat 1 , the vertical width of the limiting edges 11 is smaller than the vertical width of the side plates 22 , and the limiting edges 11 are perpendicular to the bottom plate 21 .

[0028] In a preferred embodiment, it also includes: a fixed seat, the cylinder body of the parallel cylinder 7 is connected to the fixed seat, the copper plate fixed seat 1 and the cylinder pressure plate 2 are both arranged above the fixed seat, and one end of the fixed seat is connected to the cylinder pressure plate 2.

[0029] In a preferred embodiment, it further comprises: a manual fixture transition plate 4 , a fixing seat is arranged on the manual fixture transition plate 4 , and the fixing seat is connected to the manual fixture transition plate 4 .

[0030] In a preferred embodiment, the fixed seat includes: a first fixed seat 3, the first fixed seat 3 is arranged on the manual clamp transition plate 4 and is perpendicular to the manual clamp transition plate 4, the cylinder body of the parallel cylinder 7 is fixed on the first fixed seat 3, and the cylinder pressure plate 2 is fixedly connected to one end of the first fixed seat 3.

[0031] In a preferred embodiment, the fixing seat includes: a second fixing seat 5, the second fixing seat 5 is arranged on the manual clamp transition plate 4, the second fixing seat 5 is connected to the first fixing seat 3 and the second fixing seat 5 is perpendicular to the first fixing seat 3, and the lower surface of the second fixing seat 5 is against the upper surface of the manual clamp transition plate 4.

[0032] In a preferred embodiment, the fixing seat includes: a reinforcing plate 6, which is triangular in shape and connected to the first fixing seat 3 and the second fixing seat 5 respectively, and the reinforcing plate 6 is perpendicular to the first fixing seat 3 and the second fixing seat 5 respectively.

[0033] In a preferred embodiment, the first fixing seat 3 is located in a first plane, the second fixing seat 5 is located in a second plane, the reinforcing plate 6 is located in a third plane, and the first plane, the second plane and the third plane are perpendicular to each other.

[0034] In a preferred embodiment, the cylinder pressure plate 2 and the copper plate fixing seat 1 are made of steel.

[0035] In a preferred embodiment, the manual fixture transition plate 4, the first fixing seat 3 and the second fixing seat 5 are made of aluminum.

[0036] Preferably, the surface roughness of the copper plate fixing seat 1 is less than or equal to 0.6.

[0037] More preferably, the parallel cylinder 7 is connected to a gas pressure of 0.5 MPa to 0.6 MPa.

[0038] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.

[0039] The utility model also has the following implementation methods based on the above:

[0040] In a further embodiment of the utility model, the specific implementation method is: the copper plate is placed on the copper plate fixing seat 1, and the air pressure of 0.5Mpa~0.6Mpa is opened to make the parallel cylinder 7 run and push the copper plate fixing seat 1, so that the parallel cylinder 7 pushes the copper plate fixing seat 1 to the cylinder pressure plate 2 to fix the copper plate.

[0041] In a further embodiment of the utility model, the horizontal width of the copper plate fixing seat 1 is greater than the horizontal distance between the two limit plates 23. Specifically, the copper plate fixing seat 1 rises so that the upper surface of the copper plate on the copper plate fixing seat 1 can be operably pressed against the lower surface of the limit plate 23 to achieve the clamping of the copper plate.

[0042] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An auxiliary device for conveniently cutting off excess aluminum wire and copper wire at the blade, characterized in that: include: A copper plate fixing seat, wherein the copper plate fixing seat is a plate-shaped structure and moves in a first direction; A cylinder pressure plate, the cylinder pressure plate is parallel to the copper plate fixing seat and is located below the copper plate fixing seat, the cylinder pressure plate comprises: a bottom plate, a side plate and a limit plate, a limit groove is formed between the side plate, the limit plate and the bottom plate, the copper plate fixing seat is arranged in the limit groove, and the width of the limit groove is greater than the width of the copper plate fixing seat; A parallel cylinder, wherein the cylinder body of the parallel cylinder is fixedly arranged, the piston rod of the parallel cylinder is connected to the copper plate fixing seat, and the piston rod drives the copper plate fixing seat to move in the limiting groove along the first direction.

2. The auxiliary device for conveniently cutting off excess aluminum wire and copper wire at the knife edge according to claim 1, characterized in that: The cylinder pressure plate includes: the bottom plate, two side plates respectively arranged on both sides of the bottom plate and extending vertically upward, and the limit plate arranged at the end of each side plate, the two limit plates are arranged opposite to each other and extend toward each other, and the limit plates are parallel to the bottom plate.

3. The auxiliary device for conveniently cutting off excess aluminum wire and copper wire at the knife edge according to claim 2, characterized in that: The width of the copper plate fixing seat in the horizontal direction is greater than the distance between the two limiting plates in the horizontal direction.

4. The auxiliary device for facilitating the removal of excess aluminum wire and copper wire from a knife edge according to claim 2, characterized in that: Limiting edges are also provided on both sides of the copper plate fixing seat, the vertical width of the limiting edges is smaller than the vertical width of the side plates, and the limiting edges are perpendicular to the bottom plate.

5. The auxiliary device for facilitating the removal of excess aluminum wire and copper wire from a knife edge according to claim 2, characterized in that: Also includes: A fixing seat, the cylinder body of the parallel cylinder is connected to the fixing seat, the copper plate fixing seat and the cylinder pressure plate are both arranged above the fixing seat, and one end of the fixing seat is connected to the cylinder pressure plate.

6. The auxiliary device for facilitating the removal of excess aluminum wire and copper wire from a knife edge according to claim 2, characterized in that: Also includes: A manual fixture transition plate, wherein the fixing seat is arranged on the manual fixture transition plate, and the fixing seat is connected to the manual fixture transition plate.

7. The auxiliary device for facilitating the removal of excess aluminum wire and copper wire from a knife edge according to claim 6, characterized in that: The fixing seat includes: a first fixing seat, the first fixing seat is arranged on the manual fixture transition plate and is perpendicular to the manual fixture transition plate, the cylinder body of the parallel cylinder is fixedly arranged on the first fixing seat, and the cylinder pressure plate is fixedly connected to one end of the first fixing seat.

8. The auxiliary device for facilitating the removal of excess aluminum wire and copper wire from a knife edge according to claim 7, characterized in that: The fixing seat includes: a second fixing seat, the second fixing seat is arranged on the manual clamp transition plate, the second fixing seat is connected to the first fixing seat and the second fixing seat is perpendicular to the first fixing seat, and the lower surface of the second fixing seat is against the upper surface of the manual clamp transition plate.

9. The auxiliary device for facilitating the removal of excess aluminum wire and copper wire from a knife edge according to claim 8, characterized in that: The fixing seat includes: a reinforcing plate, which is triangular in shape, connected to the first fixing seat and the second fixing seat respectively, and perpendicular to the first fixing seat and the second fixing seat respectively.

10. The auxiliary device for facilitating the removal of excess aluminum wire and copper wire from a knife edge according to claim 9, characterized in that: The first fixing seat is located in a first plane, the second fixing seat is located in a second plane, the reinforcing plate is located in a third plane, and the first plane, the second plane and the third plane are perpendicular to each other.

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