CN218983494U

CN218983494U - Module once welding tool

Info

Publication number: CN218983494U
Application number: CN202223216447.1U
Authority: CN
Inventors: 纪伟; 曲成岩; 邱玉石; 隋鑫
Original assignee: Fuxin Feiyu Electronic Technology Co ltd
Current assignee: Fuxin Feiyu Electronic Technology Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-05-09
Anticipated expiration: 2032-12-02

Abstract

The utility model belongs to the technical field of electronic components, in particular to a one-time welding tool for a module, which aims at solving the problems that the production efficiency is low and the module is easy to cause inadaptation to the working environment requirement of 125 ℃ in the prior art. According to the utility model, the semicircular jacking columns are arranged at the bottom of the female die, and the semicircular jacking columns are arranged on the first positioning die, so that uniformly distributed airflow channels are formed in the implementation process of the welding process, the welding temperature gradient of each point is small, the welding adhesion strength is improved, the problem of welding flux pollution of the bottom plate after welding is solved, the electrode terminal assembly and the chip interconnection assembly are not interfered with each other, and the production efficiency is improved while the position accuracy of one-time welding can be ensured.

Description

Module once welding tool

Technical Field

The utility model relates to the technical field of electronic components, in particular to a module primary welding tool.

Background

The semiconductor discrete device module for the PCB is widely applied to the fields of direct current power supply equipment, input rectification of a PWM inverter, magnetic power supply sharpening and the like. It features easy installation, small size, light weight and strong thermoelectric circulation.

One of the key processes in module fabrication is soldering, typically using a two-step soldering process, the first step to accomplish chip interconnection and adhesion between the chip and the DBC substrate, and the second step to solder the DBC substrate to the backplane while accomplishing soldering between the electrode terminals and the DBC substrate.

But the two-step welding method has low production efficiency and is easy to cause that the module is not suitable for the working environment requirement of 125 ℃.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a one-time welding tool for a module, which overcomes the defects of the prior art by mutually matching a female die, a first positioning die, a semicircular jacking column, a second positioning die, a positioning column and a bottom plate, and effectively solves the problems that the production efficiency is low and the module is easy to be unsuitable for the working environment requirement of 125 ℃.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the primary welding tool for the module comprises a female die, a first positioning die, positioning columns and a second positioning die, wherein a groove is formed in the bottom of the female die, semicircular jacking columns which are symmetrically distributed are respectively extended on four sides of the groove, a bottom plate is arranged on the inner wall of the bottom of the female die, the first positioning die is placed in the groove at the bottom of the female die, and the second positioning die is assembled on the inner wall of the female die;

the positioning hole is formed in the outer wall of the top of the second positioning die, the inner wall of the positioning hole is connected with a positioning column in a sliding mode, an electrode terminal is sleeved on the inner wall of the positioning column, and a DBC substrate is arranged on the inner wall of the first positioning die.

Preferably, the female die is of a U-shaped structure, the first positioning die is of a square frame structure, and the lower end of the positioning column is of a round platform structure.

Preferably, the upper surface of the semicircular jack-post is 0.3mm-0.5mm lower than the upper surface of the bottom plate, and the distance between the opposite side semicircular jack-posts is 0.2mm longer than the length of the bottom plate.

Preferably, a boss is arranged in the middle of the bottom of the female die, and the area of the boss is 70% of the area of the bottom plate.

Preferably, the fit clearance between the positioning column and the positioning hole of the second positioning die is 0.05mm-0.1mm.

Preferably, the lower surface of the semicircular jack-post is 0.2-0.4mm higher than the upper surface of the bottom plate, and the distance between the opposite side semicircular jack-posts is 0.1mm longer than the length of the DBC substrate.

The beneficial effects of the utility model are as follows:

1. according to the module one-time welding tool, the semicircular jacking columns are arranged at the bottom of the female die, and the semicircular jacking columns are arranged on the first positioning die, so that uniformly distributed airflow channels are formed in the implementation process of the welding process, the welding temperature gradient of each point is small, the welding adhesion strength is improved, and the problem of welding flux pollution of a bottom plate after welding is solved;

2. the module one-time welding tool of the design ensures that the electrode terminal assembly and the chip interconnection assembly are not interfered with each other, and can ensure the position accuracy of one-time welding while improving the production efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a module primary welding tool with a component to be welded according to the present utility model;

FIG. 2 is a partial cross-sectional view of a module primary welding tool with a component to be welded according to the present utility model;

fig. 3 is a schematic diagram of a first positioning die structure of a module primary welding tool according to the present utility model.

In the figure: 1 female die, 2 first positioning die, 21 semicircle jack-up posts, 3 second positioning die, 4 positioning posts, 5 electrode terminals, 6 bottom plates and 7DBC base plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-3, a module primary welding tool comprises a female die 1, a first positioning die 2, positioning columns 4 and a second positioning die 3, wherein a groove is formed in the bottom of the female die 1, semicircular jacking columns 21 symmetrically distributed are respectively extended on four sides of the groove, a bottom plate 6 is installed on the inner wall of the bottom of the female die 1, the first positioning die 2 is placed in the groove at the bottom of the female die 1, the second positioning die 3 is assembled on the inner wall of the female die 1, the semicircular jacking columns 21 are arranged on the first positioning die 2 through arranging the semicircular jacking columns 21 at the bottom of the female die 1, uniformly distributed airflow channels are formed in the implementation process of a welding process, welding temperature gradients of all points are small, welding adhesion strength is improved, and the problem of welding flux pollution of the bottom plate 6 after welding is solved.

Referring to fig. 1-3, a positioning hole is formed in the outer wall of the top of the second positioning die 3, a positioning column 4 is slidably connected to the inner wall of the positioning hole, an electrode terminal 5 is sleeved on the inner wall of the positioning column 4, a DBC substrate 7 is arranged on the inner wall of the first positioning die 2, assembly of the electrode terminal 5 and interconnection assembly of chips are not interfered with each other, and positional accuracy of one-time welding can be guaranteed while production efficiency is improved.

Referring to fig. 1, a female die 1 has a U-shaped structure, a first positioning die 2 has a square frame structure, and the lower end of a positioning column 4 has a circular truncated cone structure.

Referring to fig. 1-2, the upper surface of the semicircular jack posts 21 is 0.3mm-0.5mm lower than the upper surface of the base plate 6, and the distance between the opposite side semicircular jack posts 21 is 0.2mm longer than the length of the base plate 6. .

Referring to fig. 1, a boss is provided in the middle of the bottom of the female die 1, and the boss area is 70% of the area of the bottom plate 6.

Referring to fig. 1, the fit clearance between the positioning column 4 and the positioning hole of the second positioning die 3 is 0.05mm-0.1mm.

Referring to fig. 1-2, the lower surface of the semicircular jack posts 21 is 0.2-0.4mm higher than the upper surface of the base plate 6, and the distance between the opposite side semicircular jack posts 21 is 0.1mm longer than the length of the DBC substrate 7.

Working principle: when the die is used, the bottom plate 6 is placed in the groove of the female die 1, the semicircular jacking columns 21 limit the bottom plate 6, the DBC substrate 7 is placed in the first positioning die 2 after falling into the first positioning die 2, then chips are distributed on the DBC substrate 7 and interconnected to pass through a bridge, the positioning columns 4 are sleeved into the electrode terminals 5, the positioning columns 4 fall into the positioning holes, the electrode terminals 5 fall onto the DBC substrate 7 freely, the die is assembled and then moved into the welding furnace to be welded, when the die is disassembled, the positioning columns 4 are firstly taken down, the second positioning die 3 and the first positioning die 2 are sequentially taken down, and finally the welding assembly is taken out.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a module once welding frock, includes die (1), first positioning die (2), reference column (4) and second positioning die (3), its characterized in that, die (1) bottom is provided with the recess, and the recess four sides respectively extend and have semicircle post (21) of symmetric distribution, bottom plate (6) are installed to die (1) bottom inner wall, first positioning die (2) are placed in the bottom recess of die (1), and second positioning die (3) are joined in marriage on the inner wall of die (1);

the positioning hole is formed in the outer wall of the top of the second positioning die (3), the inner wall of the positioning hole is connected with a positioning column (4) in a sliding mode, an electrode terminal (5) is sleeved on the inner wall of the positioning column (4), and a DBC substrate (7) is arranged on the inner wall of the first positioning die (2).

2. The module primary welding tool according to claim 1, wherein the female die (1) is of a U-shaped structure, the first positioning die (2) is of a square frame structure, and the lower end of the positioning column (4) is of a round table structure.

3. A module primary welding fixture according to claim 1, characterized in that the upper surface of the semicircular jack-post (21) is lower than the upper surface of the bottom plate (6) by 0.3mm-0.5mm, and the distance between the opposite semicircular jack-posts (21) is 0.2mm longer than the length of the bottom plate (6).

4. The module primary welding tool according to claim 1, wherein a boss is arranged in the middle of the bottom of the female die (1), and the area of the boss is 70% of the area of the bottom plate (6).

5. The module primary welding tool according to claim 1, wherein the fit clearance between the positioning column (4) and the positioning hole of the second positioning die (3) is 0.05mm-0.1mm.

6. The module primary welding fixture according to claim 1, wherein the lower surface of the semicircular jack-post (21) is 0.2-0.4mm higher than the upper surface of the bottom plate (6), and the distance between the opposite semicircular jack-posts (21) is 0.1mm longer than the length of the DBC substrate (7).