CN215545636U

CN215545636U - Novel welding forming jig for electrode terminals of power modules

Info

Publication number: CN215545636U
Application number: CN202121370842.8U
Authority: CN
Inventors: 李光
Original assignee: Shanghai Linzhong Electronic Technology Co ltd
Current assignee: Shanghai Linzhong Electronic Technology Co ltd
Priority date: 2021-06-19
Filing date: 2021-06-19
Publication date: 2022-01-18
Anticipated expiration: 2031-06-19

Abstract

The utility model provides a novel power module electrode terminal welding forming tool, includes welding base, can dismantle the welding apron that is connected with welding base, it has a plurality of first logical grooves that separate mutually to open on the welding base, all be equipped with a plurality of orientation module on the lateral wall in every first logical groove, a plurality of reference columns of fixedly connected with on the welding apron. According to the technical scheme, the positioning module is arranged on the base, so that when an operator places the DBC in the base, the accuracy of the placement position of the DBC can be guaranteed, the position of the DBC does not need to be repeatedly corrected and adjusted, and the working efficiency of the operator is improved. The inventor still fixes a position post on the welding apron, fixes a position electrode terminal through the reference column, has replaced traditional method that uses spring pin fixed electrode terminal, has improved the stability of operation, has improved power module welded success rate simultaneously, has promoted the qualification rate of product.

Description

Novel welding forming jig for electrode terminals of power modules

Technical Field

The utility model belongs to the technical field of welding jigs, and particularly relates to a novel welding forming jig for a power module electrode terminal.

Background

A conventional power module is generally mainly composed of a metal-clad ceramic substrate (DBC), a heat sink, an electrode terminal, and the like, wherein one end of the electrode terminal is fixed to a metal layer of the metal-clad ceramic substrate by welding, and the other end is connected to an external power supply.

When welding, a welding jig is needed to fix the DBC, the heat dissipation plate and the electrode terminal, and then high-temperature welding is carried out. The conventional welding jig generally includes a welding base for supporting the heat dissipation plate and a welding cover plate for fixing the electrode terminal. But do not have the module of fixing a position DBC on current welding base, welding staff need repeatedly rectify when placing DBC on welding base usually, ensure that DBC places regularly, and this kind of operating process has reduced welded work efficiency by a wide margin. And current welding apron is all through a plurality of spring pin fixed electrode terminal, guarantees that electrode terminal displacement does not appear in welding process, but the spring pin on the welding apron can take place different flexible deformations because of the difference of external effort, leads to appearing phenomena such as rosin joint or welding tin spatter in welding process, and reduction power module welding success rate descends.

SUMMERY OF THE UTILITY MODEL

For solving above-mentioned technical problem, this utility model discloses a novel power module electrode terminal welding forming tool, can dismantle the welding apron that is connected including welding base, with welding base, it has m spaced apart first logical groove to open on the welding base, all be equipped with n a locating module on the lateral wall in every first logical groove, a plurality of reference columns of fixedly connected with x on the welding apron, wherein m is greater than or equal to 1, and n is greater than or equal to 1, and x is greater than or equal to 1.

Preferably, each positioning module comprises y identical positioning bodies, wherein each positioning body is provided with a bayonet which is clamped with the metal-coated ceramic substrate, and y is more than or equal to 1.

Preferably, a heat conducting through groove is formed between the positioning bodies on the same side of each positioning module.

Preferably, each positioning module comprises four identical positioning bodies.

Preferably, a plurality of second through grooves are formed in the welding cover plate, a partition column is arranged between every two adjacent second through grooves, and the positioning columns are fixed on the partition columns.

Preferably, both sides of each partition column are fixedly connected with positioning columns respectively.

Preferably, two ends of the welding cover plate are respectively and fixedly connected with a positioning column.

Preferably, the welding forming jig for the electrode terminal of the power module further comprises a guide plate, wherein z guide through grooves matched with the metal-clad ceramic substrate and the positioning module are formed in the guide plate, and z is larger than or equal to 1.

Preferably, the circumferential side wall of the guide through groove is of a slope type.

Preferably, the welding base is detachably connected with the welding cover plate through screws.

Has the advantages that:

(1) according to the technical scheme, the positioning module is arranged on the base, so that when an operator places the DBC in the base, the accuracy of the placement position of the DBC can be guaranteed, the position of the DBC does not need to be repeatedly corrected and adjusted, and the working efficiency of the operator is improved.

(2) The inventor still fixes a position post on the welding apron, fixes a position electrode terminal through the reference column, has replaced traditional method that uses spring pin fixed electrode terminal, has improved the stability of operation, has improved power module welded success rate simultaneously, has promoted the qualification rate of product.

(3) A heat conduction through groove is formed between positioning bodies on the same side of each positioning module, so that the heat dissipation plate can be in contact with a high-temperature welding furnace in a large area, and the welding speed of the power module is improved.

(4) The inventor can realize the accurate location when placing the DBC through the effect of deflector, has guaranteed the accuracy that the DBC placed the position.

(5) The inventor sets up the circumference lateral wall through the groove through with the direction to ramp type, makes things convenient for operating personnel to press from both sides DBC's clamp and gets, has improved the convenience of operation.

Drawings

Fig. 1 is a schematic view of the overall structure of a welding base in embodiment 1 of the present invention.

FIG. 2 is a schematic view of the structure of part A in FIG. 1.

Fig. 3 is a schematic front view of a welded cover plate in embodiment 1 of the present invention.

Fig. 4 is a schematic side view of a welded cover plate in embodiment 1 of the present invention.

Fig. 5 is a schematic view of the entire structure of the guide plate in embodiment 1 of the present invention.

1-welding a base, 2-heat conducting through grooves, 3-first through grooves, 4-positioning bodies, 5-bayonets, 6-welding cover plates, 7-positioning columns, 8-second through grooves, 9-isolating columns, 10-guide plates and 11-guide through grooves.

Detailed Description

The utility model is described in detail below by way of example and with reference to the accompanying figures 1-3. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.

Example 1

As shown in fig. 1-5, a novel welding forming jig for electrode terminals of power modules comprises a welding base 1, a welding cover plate 6 detachably connected with the welding base 1, and a guide plate, wherein the welding base is provided with 3 first through grooves 3 spaced apart from each other, and the welding base 1 can bear a heat dissipation plate by spacing the first through grooves 3 apart from each other. All be equipped with 1 orientation module on the lateral wall of the first logical groove at both ends, be equipped with 2 orientation modules on the lateral wall of the first logical groove in centre, orientation module's total number is unified with the number of heating panel and DBC's number. Each positioning module comprises 4 same positioning bodies 4, and bayonets 5 clamped with four corners of the DBC are formed in the positioning bodies 4. And a heat conduction through groove 2 is formed between the positioning bodies 4 on the same side of each positioning module, and when high-temperature welding is carried out, the contact area between the heat dissipation plate and the high-temperature welding furnace is increased through the heat conduction through groove 2, so that the efficiency and the speed of the high-temperature welding are improved. The welding cover plate 6 is provided with 4 second through grooves 8, a partition column 9 is arranged between every two adjacent second through grooves 8, the positioning columns 7 are fixed on two sides of the partition column 9, and in order to improve the stability of the electrode terminal in the welding process, two ends of the welding cover plate 6 are respectively and fixedly connected with one positioning column 7. The guide plate is provided with 4 guide through grooves 11 matched with the DBC and the 4 positioning modules, the circumferential side wall of each guide through groove 11 is of a slope type, the slope type design facilitates clamping of an operator on the DBC, operation convenience is improved, and the welding base 1 and the welding cover plate 6 are detachably connected through screws.

When the power module electrode terminal welding forming jig is used, a radiating plate needs to be placed on a welding base 1 firstly, then a guide plate 10 is placed on the welding base 1, a DBC is accurately placed in a positioning module through a guide through groove 11 of the guide plate 10, the DBC is made to be in contact with the radiating plate, then the guide plate 10 is removed, an electrode terminal is placed on the welding base 1, finally a welding cover plate 6 is pressed on the electrode terminal, the electrode terminal is fixed through a positioning column 7 on the welding cover plate 6, finally the welding base 1 and the welding cover plate 6 are connected through screws, the welding base 1 and the welding cover plate 6 can be placed in a high-temperature welding furnace for welding, the welding base 1 and the welding cover plate 6 are detached after welding is completed, and a power module consisting of the electrode terminal, the DBC and the radiating plate can be obtained.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content disclosed above into an equivalent embodiment with equivalent changes, but all those modifications, equivalents and changes made to the above embodiment according to the technical spirit of the present invention are still within the protection scope of the present invention.

Claims

1. The utility model provides a novel power module electrode terminal welding forming tool, its characterized in that, can dismantle the welding apron that is connected including welding base, with welding base, it has m first logical groove that separate mutually to open on the welding base, all be equipped with a n orientation module on the lateral wall in every first logical groove, fixedly connected with x reference column on the welding apron, wherein m is greater than or equal to 1, and n is greater than or equal to 1, and x is greater than or equal to 1.

2. The novel power module electrode terminal welding forming jig as claimed in claim 1, wherein each positioning module comprises y identical positioning bodies, each positioning body is provided with a bayonet which is clamped with the metal-coated ceramic substrate, and y is larger than or equal to 1.

3. The jig for welding and forming the electrode terminal of the power module as claimed in claim 2, wherein a heat conducting through groove is formed between the positioning bodies on the same side of each positioning module.

4. The novel welding forming jig for the electrode terminals of the power module as claimed in claim 2, wherein each positioning module comprises four identical positioning bodies.

5. The jig for welding and forming the electrode terminal of the power module as claimed in claim 1, wherein the welding cover plate has a plurality of second through grooves, and a separation column is disposed between two adjacent second through grooves, and the positioning column is fixed to the separation column.

6. The jig for welding and forming the electrode terminal of the power module as claimed in claim 5, wherein each of the two sides of each of the isolation posts is fixedly connected with a positioning post.

7. The jig for welding and forming the electrode terminal of the power module as claimed in claim 6, wherein two ends of the welding cover plate are fixedly connected with a positioning post respectively.

8. The novel power module electrode terminal welding forming jig as claimed in any one of claims 1 to 7, further comprising a guide plate, wherein z guide through grooves matched with the metal-coated ceramic substrate and the positioning module are formed in the guide plate, and z is greater than or equal to 1.

9. The jig for welding and forming the electrode terminal of the power module as claimed in claim 8, wherein the circumferential side wall of the guiding through groove is sloped.

10. The jig for welding and forming the electrode terminal of the power module as claimed in claim 1, wherein the welding base is detachably connected to the welding cover plate by screws.