CN115166311A

CN115166311A - Side pin power module's test anchor clamps in groups

Info

Publication number: CN115166311A
Application number: CN202210825562.4A
Authority: CN
Inventors: 郑莉; 冯枫; 邓林; 王波; 陈志伟
Original assignee: Shaanxi Huajing Micro Electronic Co ltd
Current assignee: Shaanxi Huajing Micro Electronic Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-10-11

Abstract

The invention belongs to the field of design of automatic testing clamps of power modules, and particularly discloses a grouped testing clamp of a side pin power module, which integrally adopts a high-temperature-resistant locking seat, wherein the locking seat comprises a base and an upper seat, the bottom of the base is hollowed to form a hollowed bottom surface, a pin placing surface is designed in the base according to the height of a side pin and the position of a flange, circular recesses are designed on two side surfaces of the base, products can be taken conveniently, and wire outlets are arranged on two side surfaces of the upper seat; two adjustable parts all adopt two PCB boards to add the spring thimble and constitute, and spring thimble one end connects in the high temperature wire is connected to the circuit of survey test panel, and other end locking seat contacts with power module's side pin when closing. The power module is only required to be placed at the hollow bottom of the locking seat, and the locking seat is closed to test. The side pin power module test fixture has the advantages of universality, economy, efficiency, accuracy and the like, and is convenient to use and simple to operate.

Description

Side pin power module's test anchor clamps in groups

Technical Field

The invention belongs to the field of design of an automatic test fixture (AFD) of a power module, and particularly relates to a test fixture for testing power modules with side pins in various overall dimensions.

Background

The tooling and the fixture are important basic components in manufacturing systems and equipment. With the continuous acceleration of the update of electronic products, the design and manufacture of various small-batch production requirements of the clamp have the capability of quickly responding to the change of the product, the design and manufacture period of the product can be shortened, the flexibility of a manufacturing system is increased, the cost is reduced, and the product quality is improved. The side pin power module is one of various product appearance structures, and the design of test fixture is accomplished, and convenient operation, safe and reliable has not only protected the device, has improved the test accuracy moreover.

The grouped clamp is a clamp with adjustable elements, belongs to a flexible clamp, and opens up a wide prospect for the production of various varieties. The grouping fixture is a specialized adjustable fixture, is specially used in a grouping process, and can process a group of workpieces with similar process characteristics, so that the grouping fixture has higher technical and economic benefits. The fixture is suitable for multiple use of a group of workpieces, so that the design and manufacturing cost of the fixture can be greatly reduced, the single-piece production cost of the workpieces can be reduced, and the production preparation period of product manufacturing can be shortened. When the product workpiece is replaced, only part of the components of the clamp are required to be adjusted or replaced, and the whole clamp does not need to be replaced again, so that the total adjusting time is reduced. For newly produced product workpieces, the clamp only needs to be added with a few adjusting elements, so that a large amount of metal materials can be saved, and the inventory area of the clamp is reduced. The group fixture is mainly composed of a base part and an adjustable part, wherein the adjustable part is one of important characteristic marks of the group fixture and directly determines the precision and the efficiency of the fixture. The existing side pin power module clamp uses a pin side plug-in type. The defects thereof are classified into the following three categories. 1. When the contact pin is plugged and pulled too tightly, the operation error is easy, and the risk of damaging the insulator is increased; when the contact pin is too loose, poor contact is easy to occur, and the test result is misjudged. 2. Products cannot be fixed, and at present, two methods are used for fixing the products on the radiating block, wherein one method is used for fixing the products through two screw pressure plates, and the other method is used for fixing the products on the radiating block by using high-temperature adhesive tapes. Both methods are time consuming and laborious to operate. 3. In the operation process, the product pins and the pin hole positions need to be contacted in a one-to-one correspondence mode, and the operation is not convenient.

Disclosure of Invention

The invention aims to provide a test grouping clamp for a side pin power module. The defects are overcome, and the testing device is suitable for testing power modules with side pins in various overall dimensions. The device has the advantages of universality, economy, efficiency, accuracy and the like, and is convenient to use and simple to operate.

The technical scheme of the invention is as follows: a test grouping clamp for a side pin power supply module is characterized by comprising a locking seat and two adjustable parts, wherein the locking seat comprises a base and an upper seat which can be mutually buckled, the bottom of the base is hollowed to form a hollowed bottom surface, a pin placing surface is designed in the base according to the height of a side pin and the position of a flange, circular recesses are designed on two side surfaces of the base, products can be conveniently taken, and wire outlets are arranged on two side surfaces of the upper seat; each adjustable component consists of two PCBs and a test pin, and two ends of the two PCBs are fixed in the upper seat through two screws.

Furthermore, the test pins are configured according to the difference of the thickness, the number and the spacing of the pins at the side of the power module.

Furthermore, one end of the testing pin is connected with the high-temperature wire and connected to the circuit of the testing board, and the other end of the testing pin is contacted with the side pin of the power supply module when the locking seat is closed.

Furthermore, radiating fins are arranged at the hollow bottom surface.

Furthermore, four corners on the base are provided with four fixed screw holes to fix the base.

Further, the base and the upper seat are buckled through a lock catch.

Furthermore, the whole locking seat is made of high-temperature-resistant materials.

Furthermore, only the power module needs to be placed on the hollow bottom surface, and the locking seat can be closed through the lock catch to carry out testing.

The invention has the following beneficial effects:

1. the design of fretwork in locking seat bottom, the power module multiplicable fin that power is big. The pin placing face is designed according to the height of the side pin and the position of the flange inside the box body, and the circular depressions suitable for the size of fingers are designed on the two side faces, so that a product can be taken conveniently.

2. The locking seat is provided with two adjustable parts, and all adopt two PCB boards to add the test pin and constitute, but according to the difference of thickness, quantity, the interval of power module side pin reconfiguration suitable spring thimble.

3. One side pin of the test pin is welded with a high-temperature lead and connected to the test board, and the other side pin is connected with a side pin of the power supply module through mechanical movement. The adjustable component is fixed on the locking seat through two screws.

4. Four fixing screw ports are used for fixing the position of the base, and the whole body adopts a high-temperature-resistant locking seat. The bottom is only required to be placed on the product, and the locking seat is closed to test.

Drawings

Fig. 1 is an outline view of a side-pin power module structure.

Figure 2 is a diagram of a test cluster jig.

Figure 3 is an exploded view of the adjustable portion of the test set fixture.

Fig. 4 is a side view of fig. 3.

The reference numbers illustrate: 1-screw port, 2-pin placing surface, 3-hollowed bottom surface, 4-circular recess, 5-outlet port, 6-two PCB boards, 7-test pin, 8-lock catch and 9-flange.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples of the present invention without any inventive step, are within the scope of the present invention.

Fig. 1 is a schematic diagram of a side-pin power module according to the present invention, in which the pins are located at two sides of the product and the middle of the product is at an upper height. The other two sides are respectively provided with a flange 9 with a certain thickness.

Figure 2 is the test anchor clamps in groups of design, wholly adopts high temperature resistant locking seat, through the fixed locking seat of four screw mouths 1, and the high design of the side pin of figure 1 is followed to the height of pin face 2 of placing. The bottom surface of the locking seat adopts a hollow design to form a hollow bottom surface 3, and a radiating fin can be added at the position of a product with high power. The placing positions of the flanges 9 are reserved on the two sides of the locking seat, so that when a product is placed on the bottom surface, the bottom surface of the product still supports the whole weight, the side pins are prevented from being stressed, and the insulator is protected. The two side faces of the locking seat base are provided with round recesses 4 suitable for fingers, so that products can be taken conveniently. The outlets 5 of the high-temperature wires on the two sides of the upper seat of the locking seat are led out to corresponding circuits of the test board or the aging board.

Fig. 3 and 4 are exploded views of the adjustable portion of the test set fixture. Two screws are reserved at the upper end and the lower end of each of the two PCBs 6 and are used for being mounted in the locking seat upper seat, and the position of the test needle 7 is designed to be suitable according to the distance between pins of a product, the thickness of the pins and the number of the pins. The test needle adopts the spring needle, has dampproofing and waterproofing antidetonation performance, and the contact is more accurate, and is more stable. One end of the test needle 7 is connected to the high temperature wire and connected to the circuit of the test board, and the other end contacts with the product pin when the locking seat is closed. The bottom only needs to be placed to the product, and the hasp 8 of closed locking seat can test, and the operation is more convenient.

The invention can shorten the auxiliary time in the product testing process and reduce the labor intensity of workers. In addition, the jig used at present can be replaced in situ without redesigning and purchasing a new burn-in board and a new test board. The design of the grouped fixture can finish the reusable test fixture with various different forms and structures only by changing the adjustable part, and the reusable test fixture can be used for single-piece or medium-small batch production. Compared with the special fixture, the mold opening cost can be reduced, and the cost is reduced. The assembly of the clamp system is simple and reliable like a special clamp, has an adjustable part, and has the advantages of economy, convenience, universality, accuracy and the like.

Claims

1. A test grouping clamp for side pin power supply modules is characterized by comprising a locking seat and two adjustable parts, wherein the locking seat comprises a base and an upper seat which can be mutually buckled, the bottom of the base is hollowed to form a hollowed bottom surface (3), a pin placing surface (2) is designed in the base according to the height of a side pin and the position of a flange (9), circular recesses (4) are designed on two side surfaces of the base, and wire outlets (5) are arranged on two side surfaces of the upper seat; each adjustable component consists of two PCB boards (6) and a test needle (7), and two ends of the two PCB boards (6) are fixed in the upper seat through two screws.

2. A design of test group fixture for side-pin power modules according to claim 1, wherein the test pins (7) are configured according to the thickness, number and spacing of the side pins of the power module.

3. The design of test grouping jig for side-pin power module according to claim 2, wherein the test pins (7) are connected to the circuit of the test board by high temperature wires at one end, and contact with the side pins of the power module when the other end of the locking seats is closed.

4. The design of the test jig set for the side-pin power module as claimed in claim 1, wherein a heat sink is provided at the hollowed-out bottom surface (3).

5. The design of the test grouping jig for the side pin power supply module as claimed in claim 1, wherein four fixing screw ports (1) are provided at four corners of the upper surface of the base for fixing the base.

6. The design of test nest fixture for side-pin power modules as claimed in claim 1, wherein the base and upper seat are snap-fitted by means of a latch (8).

7. The design of test nest fixture for side-pin power modules of claim 1, wherein the locking seat is made entirely of high temperature resistant material.

8. The design of the test grouping jig for the side pin power module as claimed in claim 6, wherein the test can be performed only by placing the power module on the hollowed bottom surface (3) and closing the locking seat by the lock catch (8).