Contact pin welding jig

Abstract

The utility model discloses a contact pin welding jig, which relates to the technical field of semiconductor welding jigs and comprises a contact pin bottom plate, a contact pin hole shielding plate, a contact pin welding jig main body and a pin pressing mechanism, a plurality of detachable positioning columns are arranged on the contact pin welding jig body and used for positioning and installing different substrates, array type pin positioning holes are formed in the front face of the contact pin welding jig body, and the contact pin hole shielding plate is used for exposing the positions where contact pins are needed according to products of different topologies. The pin bottom plate is used for supporting a substrate mounted on the pin welding jig main body, and the pin pressing mechanism is used for applying pressure to pins. According to the contact pin welding jig, the compatibility of the contact pin welding jig can be improved, the contact pin welding jig is suitable for pin welding of different substrates, the production cost is reduced, the jig is convenient to use and manage, and waste of manpower and space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor welding jigs, in particular to a pin welding jig. Background Art

[0002] In the field of semiconductor welding technology, welding technology is a key technology that determines the quality and reliability of the product. Among them, the design and use of pin welding jigs are important links in the welding process, which directly affects the quality and efficiency of welding. At the same time, the manufacturing field also puts forward higher requirements for the design and manufacture of pin welding jigs to meet the needs of improving product welding quality.

[0003] In the existing technology, different pin welding jigs are usually used to adapt to module products with the same package and different topologies. Although this method can complete product welding, in actual operation, the pin welding jig needs to be replaced frequently, which not only increases production costs, but also makes the use and management of the jig complicated, resulting in a waste of manpower and space. Utility Model Content

[0004] The purpose of the utility model is to provide a pin welding jig to solve the problems existing in the above-mentioned prior art, to improve the compatibility of the pin welding jig, to be suitable for pin welding of different substrates, to reduce production costs, and to make the jig easy to use and manage, thereby reducing waste of manpower and space.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a pin welding jig, comprising a pin base plate, a pin hole shielding plate, a pin welding jig body and a pin pressing mechanism; the pin welding jig body is provided with a plurality of detachable positioning columns for positioning and installing different substrates, the pin welding jig body is provided with an array of pin positioning holes on the front side, the pin hole shielding plate is used to expose the positions where pins are required for products with different topologies, the pin base plate is used to support the substrate installed on the pin welding jig body, and the pin pressing mechanism is used to apply pressure to the pins.

[0007] Preferably, the pin welding jig body includes a pin welding jig body middle plate, the pin pin positioning hole is arranged on the front side of the pin welding jig body middle plate, and 3-6 positioning columns are respectively arranged on both sides of the pin welding jig body middle plate.

[0008] Preferably, the pin positioning holes are arranged in an array with a pitch of 3.2 mm.

[0009] Preferably, the needle pressing mechanism includes a needle pressing cover plate, a needle pressing plate A, a needle pressing plate B, a pressing column and a needle pressing base plate. The needle pressing base plate is provided with a pressing column hole corresponding to each of the pin needle positioning holes one by one. The pressing column is axially movably arranged in the pressing column hole. The needle pressing cover plate is arranged on the needle pressing base plate. The needle pressing plate A and the needle pressing plate B are arranged between the needle pressing base plate and the needle pressing cover plate, and are used to press down each of the pressing columns and press down each pin needle through the pressing column. The needle pressing plate B is used to press down each of the pressing columns in the middle, and the needle pressing plate A is used to press down each of the pressing columns on both sides.

[0010] Preferably, one needle pressing plate A is disposed on each side of the needle pressing plate B.

[0011] Preferably, the needle pressing mechanism includes a needle pressing plate and a pressure head unit, and the needle pressing plate is provided with a plurality of pressure head units corresponding one by one to each of the pin needle positioning holes, and the pressure head unit includes a pressure rod, a compression spring and a pressure head, one end of the pressure rod is threadedly connected to the needle pressing plate, and the other end is threadedly connected to the pressure head, the compression spring is sleeved on the pressure head, and the two ends of the compression spring respectively abut against the end face of the pressure rod and the step surface of the pressure head.

[0012] Preferably, a guide column is provided at each of the four corners of the middle plate of the pin welding jig body, and guide column positioning holes corresponding to the guide columns are provided at each of the four corners of the pin base plate; a support bar is provided at each of the two ends of the middle plate of the pin welding jig body, and each of the support bars connects the two guide columns at the same end.

[0013] Preferably, a positioning pin is provided on the middle plate of the pin welding fixture body, and a pin hole cooperating with the positioning pin is provided on the pin hole shielding plate.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] The pin welding jig provided by the utility model can be compatible with products of different topologies through different pin shielding plates, and can be compatible with the installation and positioning of different substrates by installing positioning columns in different positions, thereby improving the compatibility of the pin welding jig and being suitable for pin welding of different substrates, reducing production costs, and avoiding the disadvantage of traditionally using different pin welding jigs to adapt to module products of the same package and different topologies, and the need to frequently replace the pin welding jig in actual operation. The utility model adopts a single jig to adapt to the production of module products of different topologies, and the jig is more convenient to use and manage, reducing the waste of manpower and space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of an exploded view of the pin welding fixture in the first embodiment;

[0018] Figure 2 This is a schematic diagram of the decomposition of the pin welding jig in Example 1 when it is inverted;

[0019] Figure 3 It is a structural schematic diagram of the pin welding fixture body in the first embodiment;

[0020] Figure 4 This is a schematic diagram of the pin welding fixture in Example 1 being compatible with a four-hole substrate;

[0021] Figure 5 A schematic diagram of shielding the pin positioning hole by the pin shielding plate in the first embodiment;

[0022] Figure 6 A schematic diagram of shielding the pin positioning hole by another pin shielding plate in Embodiment 1;

[0023] Figure 7 It is an exploded schematic diagram of the needle pressing mechanism in the first embodiment;

[0024] Figure 8 This is a schematic diagram of the pin pressing mechanism in Example 1 pressing down the pin pin;

[0025] Fig. 9 This is a schematic diagram of the exploded view of the pin welding fixture in the second embodiment;

[0026] Fig.10 This is a schematic diagram of the decomposition of the pin welding fixture in the second embodiment when it is inverted;

[0027] Fig.11 It is a structural schematic diagram of the needle pressing mechanism in the second embodiment;

[0028] Fig.12 It is a structural schematic diagram of the pressing head unit in the needle pressing mechanism in the second embodiment;

[0029] Fig.13 This is a schematic diagram of the pin pressing mechanism in the second embodiment pressing down the pin pin.

[0030] In the figure: 1-pin base plate, 2-pin hole shielding plate, 3-pin welding fixture body, 4-pin pressing mechanism, 5-positioning column, 6-pin needle positioning hole, 7-pin welding fixture body middle plate, 8-pin pressing cover plate, 9-pin pressing plate A, 10-pin pressing plate B, 11-pressure column, 12-pin pressing base plate, 13-guide column, 14-support bar, 15-positioning pin, 16-pin pressing plate, 17-pressure head unit, 18-pressure rod, 19-compression spring, 20-pressure head, 21-step surface, 22-guide column positioning hole, 23-substrate, 24-pin needle, 25-DBC, 26-pin hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The purpose of the utility model is to provide a pin welding jig to solve the problems existing in the prior art, improve the compatibility of the pin welding jig, be suitable for pin welding of different substrates, reduce production costs, and make the jig easy to use and manage, thereby reducing waste of manpower and space.

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1-Figure 8 As shown, this embodiment provides a pin welding jig, including a pin base plate 1, a pin hole shielding plate 2, a pin welding jig body 3 and a pin pressing mechanism 4; a plurality of detachable positioning columns 5 are provided on the pin welding jig body 3 for positioning and installing different substrates, an array of pin positioning holes 6 are provided on the front of the pin welding jig body 3, the pin hole shielding plate 2 is used to expose the positions where pins are required for products with different topologies, the pin base plate 1 is used to support the substrate 23 installed on the pin welding jig body 3, and the pin pressing mechanism 4 is used to apply pressure to the pin 24.

[0036] Different pin shielding plates 2 can be compatible with products of different topologies, and different substrates 23 can be compatible with installation and positioning by installing positioning posts 5 at different positions, thereby improving the compatibility of the pin welding jig, which is suitable for pin welding of different substrates, reducing production costs, and avoiding the traditional use of different pin welding jigs to adapt to module products with the same package and different topologies. In actual operation, the disadvantage of frequent replacement of pin welding jigs is avoided. This embodiment uses a single jig to adapt to the production of module products with different topologies, making the jig more convenient to use and manage, and reducing the waste of manpower and space. Among them, the pin base plate 1 is a flat plate, which is used to stably support the substrate 23. The positioning post 5 is connected to the pin jig body 3 by bolts.

[0037] In this embodiment, the pin welding fixture body 3 includes a pin welding fixture body middle plate 7, a pin positioning hole 6 is arranged on the front of the pin welding fixture body middle plate 7, and 3-6 positioning columns 5 are arranged on both sides of the pin welding fixture body middle plate 7. By installing the positioning columns 5 at different positions, the installation and positioning of different substrates 23 are compatible, such as Figure 3 As shown, it is compatible with the positioning of a four-hole substrate.

[0038] In this embodiment, the pin positioning holes 6 are arranged in an array with a pitch of 3.2 mm.

[0039] In the present embodiment, the needle pressing mechanism 4 includes a needle pressing cover plate 8, a needle pressing plate A9, a needle pressing plate B10, a pressing column 11 and a needle pressing base plate 12. The needle pressing base plate 12 is provided with a pressing column hole corresponding to each pin needle positioning hole 6. The pressing column 11 is axially movable in the pressing column hole. The needle pressing cover plate 8 is arranged on the needle pressing base plate 12. The needle pressing plate A9 and the needle pressing plate B10 are arranged between the needle pressing base plate 12 and the needle pressing cover plate 8, and are used to press down each pressing column 11, and press down each pin needle 24 through the pressing column 11. The needle pressing plate B10 is used to press down each pressing column 11 in the middle, and the needle pressing plate A9 is used to press down each pressing column 11 on both sides. In the present embodiment, a needle pressing plate A9 is arranged on both sides of the needle pressing plate B10. The pressing column 11 plays a role in applying pressure to the pin needle 24 to ensure that the pin needle 24 falls. The pressure column 11 applies pressure to the pin needle 24 in free fall, and the overpressure is 1mm, which can ensure that each pin needle 24 is stressed, so that the pin needle 24 can fall freely. The pressure pin plate A9 and the pressure pin plate B10 apply pressure to the DBC (abbreviation of Direct Bonded Copper) 25 welded on the substrate 23 through the pressure column 11 and the pin needle 24, and different weights are set by calculation to ensure that there is more pressure in the middle position of the DBC 25.

[0040] Due to the problem of product arch, tin flows to the middle during welding, resulting in a relatively thin tin layer at the edge of DBC25. The current needle press plate B10 is made of stainless steel, and the needle press plate A9 is made of aluminum alloy. The weight of the needle press plate B10 is relatively large, so that the force in the middle of DBC25 is large and the force on both sides is small, causing the tin to flow to the edge, thereby ensuring the uniformity of the solder layer.

[0041] In this embodiment, a guide column 13 is provided at each of the four corners of the middle plate 7 of the pin welding jig body, and a guide column positioning hole 22 corresponding to each guide column 13 is provided at each of the four corners of the pin base plate 1. The guide column 13 is connected with the guide column positioning holes 22 at the four corners of the pin base plate 1 to assemble and position the middle plate 7 of the pin welding jig body and the pin base plate 1. A support bar 14 is provided at each of the two ends of the middle plate 7 of the pin welding jig body, and each support bar 14 connects the two guide columns 13 at the same end, thereby improving the stability of the guide column 13 and improving the positioning accuracy when positioning and assembling with the pin base plate 1.

[0042] In this embodiment, a positioning pin 15 is provided on the middle plate 7 of the pin welding fixture body, and a pin hole 26 cooperating with the positioning pin 15 is provided on the pin shielding plate 2. When the pin shielding plate 2 is placed, the positioning pin 15 and the pin hole 26 cooperate with each other to prevent the pin shielding plate 2 from being misplaced.

[0043] Embodiment 2

[0044] like Figure 9-13 As shown, this embodiment provides a pin welding jig, which is different from the first embodiment in that the pin pressing mechanism 4 includes a pin pressing plate 16 and a pressure head unit 17. The pin pressing plate 16 is provided with a plurality of pressure head units 17 corresponding to each pin pin positioning hole 6. The pressure head unit 17 includes a pressure rod 18, a compression spring 19 and a pressure head 20. One end of the pressure rod 18 is threadedly connected to the pin pressing plate 16, and the other end is threadedly connected to the pressure head 20. The compression spring 19 is sleeved on the pressure head 20, and the two ends of the compression spring 19 are respectively abutted on the end surface of the pressure rod 18 and the step surface 21 of the pressure head 20. The pressure head unit 17 plays a role in applying pressure to the pin pin 24 to ensure that the pin pin 24 falls. The pressure on the pin can be controlled by adjusting the height of the pressure head unit 17. The force of each pressure head unit 17 is different, thereby ensuring that there is more pressure in the middle position of the DBC 25, and the force on both sides is small, so that the tin flows to the edge, ensuring the uniformity of the solder layer.

[0045] The operation steps of the pin welding fixture provided by the utility model are as follows:

[0046] Step 1: Place the top surface of the pin welding fixture body 3 downward, and use the pin shielding plate 2 to block the extra pin positioning holes 6 according to different product models;

[0047] Step 2: Insert the pin needle 24 into the exposed pin needle positioning hole 6, and fill it up in sequence;

[0048] Step 3: After the pins are inserted, remove the pin shielding plate 2;

[0049] Step 4: Place the substrate 23 (with DBC 25 already welded) onto the pin welding fixture body 3 according to the positioning posts 5 (the two-hole substrate 23 corresponds to the middle positioning post 5, and the four-hole substrate 23 corresponds to the two-side positioning posts 5);

[0050] Step 5: Cover the pin base plate 1;

[0051] Step 6: Turn the entire fixture upside down;

[0052] Step 7: Cover the needle pressing mechanism 4 and apply pressure to each pin 24 through the needle pressing mechanism 4 .

[0053] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A pin welding jig, characterized in that: It includes a pin base plate, a pin hole shielding plate, a pin welding jig body and a pin pressing mechanism; the pin welding jig body is provided with a plurality of detachable positioning columns for positioning and installing different substrates, the front of the pin welding jig body is provided with an array of pin positioning holes, the pin hole shielding plate is used to expose the positions where pins are required for products with different topologies, the pin base plate is used to support the substrate installed on the pin welding jig body, and the pin pressing mechanism is used to apply pressure to the pins.

2. The pin welding jig according to claim 1, characterized in that: The pin welding jig body includes a pin welding jig body middle plate, the pin pin positioning hole is arranged on the front side of the pin welding jig body middle plate, and 3-6 positioning columns are respectively arranged on both sides of the pin welding jig body middle plate.

3. The pin welding jig according to claim 1, characterized in that: The pin positioning holes are arranged in an array with a pitch of 3.2 mm.

4. The pin welding jig according to claim 1, characterized in that: The needle pressing mechanism includes a needle pressing cover plate, a needle pressing plate A, a needle pressing plate B, a pressing column and a needle pressing base plate. The needle pressing base plate is provided with a pressing column hole corresponding to each of the pin needle positioning holes. The pressing column is axially movably arranged in the pressing column hole. The needle pressing cover plate is arranged on the needle pressing base plate. The needle pressing plate A and the needle pressing plate B are arranged between the needle pressing base plate and the needle pressing cover plate, and are used to press down each of the pressing columns, and press down each of the pin needles through the pressing columns. The needle pressing plate B is used to press down each of the pressing columns in the middle, and the needle pressing plate A is used to press down each of the pressing columns on both sides.

5. The pin welding jig according to claim 4, characterized in that: A needle pressing plate A is disposed on each side of the needle pressing plate B.

6. The pin welding jig according to claim 1, characterized in that: The needle pressing mechanism includes a needle pressing plate and a pressure head unit. The needle pressing plate is provided with a plurality of pressure head units corresponding to the pin needle positioning holes one by one. The pressure head unit includes a pressure rod, a compression spring and a pressure head. One end of the pressure rod is threadedly connected to the needle pressing plate, and the other end is threadedly connected to the pressure head. The compression spring is sleeved on the pressure head, and the two ends of the compression spring are respectively abutted against the end face of the pressure rod and the step surface of the pressure head.

7. The pin welding jig according to claim 2, characterized in that: A guide column is provided at each of the four corners of the middle plate of the pin welding jig body, and guide column positioning holes corresponding to the guide columns are provided at each of the four corners of the pin base plate; a support bar is provided at each of the two ends of the middle plate of the pin welding jig body, and each support bar connects the two guide columns at the same end.

8. The pin welding jig according to claim 1, characterized in that: A positioning pin is provided on the middle plate of the pin welding fixture body, and a pin hole matching with the positioning pin is provided on the pin hole shielding plate.

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