Pin welding fixture and method

Abstract

The present application provides a pin welding tool and method, wherein the welding tool comprises a partition assembly and a positioning component, the partition assembly is detachably connected with the base plate and the positioning component respectively, the partition assembly is provided with a first gasket positioning groove matched with the gasket, the positioning component is correspondingly provided with a second gasket positioning groove matched with the gasket, and the positioning component is further provided with a positioning hole matched with the pin. The pin welding tool and method of the present application limit the pin during the welding process through the positioning component, and the gasket is fixed and arranged on the base plate through the partition assembly, which ensures the quick assembly of the pin, guarantees the perpendicularity and position degree of the pin after welding, is suitable for mass production, and through the corresponding arrangement of multiple sets of gaskets on the partition assembly and the positioning component, the multiple gaskets can simultaneously weld the pin, thereby improving the welding production efficiency and manufacturability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of IGBT module Pin pin welding process, in particular to a Pin pin welding tool and method. BACKGROUND

[0002] With the rapid development of new energy vehicles, IGBT modules have become more and more important in electric vehicles due to their small driving power, small switching loss, fast on-off speed, high working frequency and other characteristics, which also puts higher requirements on the reliability of IGBT modules. The industry mainly adopts two ways to lead the auxiliary poles of IGBT modules: 1) split type scheme of needle seat + pin, welding needle seat in the backing plate stage, and inserting pin in the module stage, which has two processes of needle seat welding and pin inserting, low production efficiency, and the perpendicularity of Pin pin cannot be guaranteed; 2) integrated pin welding scheme, pre-melting solder on the surface of the backing plate in the backing plate stage, and welding Pin pin in the module welding stage, which has the problem of complex Pin pin positioning structure, which is not conducive to the rapid assembly of Pin pin. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, provide a Pin pin welding tool and method, realize the rapid assembly of Pin pin, ensure the perpendicularity and position of Pin pin after welding, and be suitable for mass production.

[0004] In order to solve the above technical problems, the technical scheme provided by the present application is as follows:

[0005] A Pin pin welding tool, comprising a partition plate assembly and a positioning component, wherein the partition plate assembly is detachably connected with the base plate and the positioning component, the partition plate assembly is provided with a first backing plate positioning groove matched with the backing plate, the positioning component is provided with a second backing plate positioning groove matched with the backing plate, and the positioning component is further provided with a positioning hole matched with the Pin pin.

[0006] According to the Pin pin welding tool of the present application, the positioning component limits the Pin pin during welding, ensuring the perpendicularity and position of the Pin pin. In order to position more accurately, the inner diameter of the positioning hole is 0.05-0.3mm larger than the width or outer diameter of the Pin pin. The backing plate is fixed and arranged on the base plate by the partition plate assembly. Therefore, the whole welding tool can realize the rapid assembly of Pin pin while ensuring the perpendicularity and position of Pin pin after welding, and is suitable for mass production. Moreover, by corresponding setting multiple sets of backing plates on the partition plate assembly and the positioning component, multiple backing plates can be welded with Pin pins at the same time, improving the welding production efficiency and manufacturability.

[0007] The above technical scheme can be further improved as follows.

[0008] According to the Pin needle welding tool, in a preferred embodiment, the partition plate assembly comprises a positioning plate and positioning pins symmetrically arranged on the positioning plate, the positioning plate is provided with a first backing plate positioning groove, and the positioning pins are connected with the base plate and the positioning component respectively.

[0009] Specifically, the partition plate assembly is assembled with the base plate and the positioning component through the positioning pins, facilitating assembly and disassembly and easily ensuring assembly precision between the partition plate assembly and the positioning component.

[0010] Further, in a preferred embodiment, the positioning pins are threadedly connected with the positioning plate, and the two ends of the positioning pins are connected with the base plate and the positioning component respectively.

[0011] The above connection structure can effectively ensure coaxiality and assembly precision between the positioning plate and the positioning component, and the material of the positioning plate is preferably graphite or titanium alloy.

[0012] Further, in a preferred embodiment, a chamfer structure is arranged on one end of the positioning pin close to the positioning component.

[0013] By machining a chamfer on the top of the positioning pin, cooperation with the positioning component and disassembly are facilitated, and preferably, the inner diameter of the mounting hole corresponding to the positioning pin on the base plate and the positioning component is 0.05-0.3 mm larger than the outer diameter of the pin, facilitating cooperation, installation and disassembly.

[0014] Further, in a preferred embodiment, the Pin needle welding tool of the present application further comprises a fixing assembly detachably connected with the positioning component, and the fixing assembly is provided with a positioning structure forming an interference fit with the Pin needle.

[0015] The fixing assembly is used to fix the Pin needle inside the fixing assembly, facilitating turning and moving of the Pin needle after assembly, avoiding problems such as falling and sliding of the Pin needle, and ensuring that the Pin needles are located on the same vertical line, and preferably, the fixing tool is made of titanium alloy, aluminum alloy or graphite.

[0016] Further, in a preferred embodiment, the positioning structure comprises an elastic positioning column sleeved on the Pin needle.

[0017] Specifically, fluorine or other soft materials can well position the Pin needle without damaging the Pin needle.

[0018] Further, in a preferred embodiment, the positioning structure comprises a spring structure sleeved on the Pin needle.

[0019] Similarly, the spring structure can well position the Pin needle without damaging the Pin needle.

[0020] Further, in a preferred embodiment, the inner diameter of the positioning structure is 0.05-0.3mm smaller than the width of the top of the Pin needle.

[0021] The opening diameter of the positioning structure is 0.05-0.3mm smaller than the width of the Pin needle, so as to ensure that the Pin needle can be fixed inside the positioning structure without falling during assembly.

[0022] The Pin needle welding method of the second aspect of the present application is implemented by using the above-mentioned Pin needle welding tool, and comprises the following steps: S01, arranging the spacer assembly on the substrate, arranging the soldering sheet on the substrate, and arranging the backing plate on the spacer assembly; S02, sleeving the positioning component on the Pin needle; S03, connecting the positioning component with the spacer assembly; and S04, welding the Pin needle.

[0023] Obviously, according to the Pin needle welding method of the present application, since the above-mentioned welding tool is used for implementation, the verticality and position degree of the Pin needle after welding are ensured while the Pin needle is quickly assembled, and it is suitable for mass production.

[0024] Further, in a preferred embodiment, the Pin needle welding tool further comprises a fixing assembly, and after the fixing assembly is connected with the positioning component in step S02, the Pin needle is arranged on the positioning component and the fixing assembly in sequence; and in step S04, the fixing assembly is removed, and the Pin needle is welded.

[0025] Through the above-mentioned implementation steps, it can be effectively ensured that the Pin needle does not fall and slide during turning and moving after assembly,

[0026] Compared with the prior art, the advantages of the present application are that: the positioning component limits the Pin needle during welding, so as to ensure the verticality and position degree of the Pin needle; the backing plate is limited and fixed by the spacer assembly and arranged on the substrate, so that the entire welding tool ensures the verticality and position degree of the Pin needle after welding while realizing the quick assembly of the Pin needle, and it is suitable for mass production. Moreover, a plurality of backing plates are arranged on the spacer assembly and the positioning component, so as to satisfy the simultaneous welding of the Pin needle by the plurality of backing plates, improve the welding production efficiency, and improve the manufacturability. BRIEF DESCRIPTION OF DRAWINGS

[0027] In the following, the present application will be described in more detail based on embodiments and with reference to the accompanying drawings. In which:

[0028] Figure 1 Fig. 1 schematically shows the split structure of the Pin needle welding tool of the first embodiment of the present application;

[0029] Figure 2Fig. 1 schematically shows the front view structure of the spacer assembly in the embodiment 1 of the present application;

[0030] Figure 3 Fig. 2 schematically shows the top view structure of the positioning plate in the embodiment 1 of the present application;

[0031] Figure 4 Fig. 3 schematically shows the top view structure of the positioning component in the embodiment 1 of the present application;

[0032] Figure 5 Fig. 4 schematically shows the partial mating structure of the Pin and the positioning structure in the embodiment 1 of the present application;

[0033] Figure 6 Fig. 5 schematically shows the assembly structure of the positioning component and the fixing assembly in the embodiment 1 of the present application;

[0034] Figure 7 Fig. 6 schematically shows the overall assembly structure of the Pin welding tool in the embodiment 1 of the present application;

[0035] Figure 8 Fig. 7 schematically shows the assembly structure of the fixing assembly and the positioning component in the embodiment 1 of the present application;

[0036] Figure 9 Fig. 8 schematically shows the partial enlarged assembly structure of the fixing assembly and the Pin in the embodiment 1 of the present application;

[0037] Figure 10 Fig. 9 schematically shows the flow of the welding method in the embodiment 2 of the present application.

[0038] In the drawings, the same parts are designated by the same reference numerals. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0039] The present application will be further described below in conjunction with the drawings and specific embodiments, but the protection scope of the present application is not limited by the same.

[0040] Figure 1 Fig. 1 schematically shows the front view structure of the spacer assembly in the embodiment 1 of the present application; Figure 2 Fig. 1 schematically shows the front view structure of the spacer assembly in the embodiment 1 of the present application; Figure 3 Fig. 2 schematically shows the top view structure of the positioning plate in the embodiment 1 of the present application; Figure 4 Fig. 3 schematically shows the top view structure of the positioning component in the embodiment 1 of the present application; Figure 5 Fig. 4 schematically shows the partial mating structure of the Pin and the positioning structure in the embodiment 1 of the present application; Figure 6 Fig. 5 schematically shows the assembly structure of the positioning component and the fixing assembly in the embodiment 1 of the present application; Figure 7The schematic diagram shows the overall assembly structure of the Pin welding fixture 10 of Embodiment 1 of the invention. Figure 8 The schematic diagram illustrates the assembly structure of the fixing component 3 and the positioning component 2 in Embodiment 1 of the invention. Figure 9 The diagram schematically shows a partially enlarged assembly structure of the fixing component 3 and the pin in Embodiment 1 of the invention. Figure 10 The schematic diagram illustrates the flow of the welding method of Embodiment 2 of the invention.

[0041] Example 1

[0042] like Figures 1 to 4 As shown, the pin welding fixture of this embodiment includes a partition assembly 1 and a positioning component 2. The partition assembly 1 is detachably connected to the substrate 5 and the positioning component 2. The partition assembly 1 is provided with a first liner positioning groove 111 that cooperates with the liner 6. The positioning component 2 is provided with a second liner positioning groove 21 that cooperates with the liner. The positioning component 2 is also provided with a positioning hole 22 that cooperates with the pin 4.

[0043] According to an embodiment of the present invention, the pin welding fixture limits the pin during the welding process through a positioning component, ensuring the perpendicularity and positional accuracy of the pin. For more precise positioning, the inner diameter of the positioning hole is 0.05–0.3 mm larger than the width or outer diameter of the pin. The backing plate is fixedly arranged on the substrate by a spacer assembly. Therefore, the entire welding fixture ensures rapid assembly of the pin while guaranteeing the perpendicularity and positional accuracy of the pin after welding, making it suitable for mass production. Furthermore, by correspondingly setting multiple sets of backing plates on the spacer assembly and the positioning component, multiple backing plates can be welded to pins simultaneously, improving welding production efficiency and manufacturability.

[0044] like Figure 2 and Figure 3 As shown, specifically in this embodiment, the partition assembly 1 includes a positioning plate 11 and positioning pins 12 symmetrically arranged on the positioning plate 11. The positioning plate 11 is provided with a first liner positioning groove 111, and the positioning pins 12 are respectively connected to the base plate 5 and the positioning component 2. Specifically, the partition assembly is assembled with the base plate and the positioning component through the positioning pins, which facilitates assembly and disassembly and easily ensures the assembly accuracy between the partition assembly and the positioning component.

[0045] like Figure 3As shown, further, in the embodiment, the positioning pin 12 is threadedly connected between the positioning plate 11, and the positioning pin 12 is connected to the base plate 5 and the positioning component 2 at two ends respectively. The above connection structure can effectively ensure the coaxiality and assembly precision between the positioning plate and the positioning component, and the material of the positioning plate is preferably graphite or titanium alloy. Further, in the embodiment, a chamfer structure is arranged at one end of the positioning pin 12 close to the positioning component 2. By chamfering the top of the positioning pin, cooperation and disassembly with the positioning component are facilitated. Preferably, the inner diameter of the mounting hole corresponding to the positioning pin on the base plate and the positioning component is 0.05-0.3 mm larger than the outer diameter of the pin, facilitating cooperation and disassembly.

[0046] As shown in Figure 1 , Figures 5 to 9 As shown, further, the Pin needle welding tool 10 of the embodiment also comprises a fixing assembly 3 connected to the positioning component in a detachable manner, and the fixing assembly 3 is provided with a positioning structure 31 forming an interference fit with the Pin needle 4. By means of the fixing assembly, the Pin needle is fixed inside the fixing assembly, facilitating the Pin needle to be turned over and moved after assembly, avoiding problems such as falling and sliding of the Pin needle, and ensuring that the Pin needles are located on the same vertical line. Preferably, the fixing tool is made of titanium alloy, aluminum alloy or graphite.

[0047] Further, in the embodiment, the positioning structure 31 comprises an elastic positioning column sleeved on the Pin needle. Specifically, fluorine or other soft materials are used, which can well position the Pin needle without damaging the Pin needle. Further, in another embodiment, the positioning structure 31 comprises a spring structure sleeved on the Pin needle. Similarly, the spring structure can well position the Pin needle without damaging the Pin needle.

[0048] Further, in the embodiment, the inner diameter of the positioning structure 31 is 0.05-0.3 mm smaller than the width of the top of the Pin needle. The opening diameter of the positioning structure is 0.05-0.3 mm smaller than the width of the Pin needle, ensuring that the Pin needle can be fixed inside the positioning structure without falling during assembly.

[0049] Embodiment 2

[0050] As shown in Figure 10 The Pin needle welding method of the embodiment of the application is implemented by using the above-mentioned Pin needle welding tool 10, and comprises the following steps: S01, arranging the spacer assembly on the base plate, arranging the soldering sheet on the base plate, and arranging the backing plate on the spacer assembly, S02, sleeving the positioning component on the Pin needle, S03, connecting the positioning component and the spacer assembly, and S04, welding the Pin needle.

[0051] Obviously, according to the Pin needle welding method of the present application, since the welding tooling is implemented as described above, the verticality and position degree of the Pin needle after welding are ensured while the Pin needle is quickly assembled, and the method is suitable for mass production.

[0052] Further, in the present embodiment, the Pin needle welding tooling 10 further comprises a fixing assembly 3, after the fixing assembly is connected with the positioning component in step S02, the Pin needle is arranged on the positioning component and the fixing assembly in sequence, and after the fixing assembly is removed in step S04, the Pin needle is welded. Through the above implementation steps, it can be effectively ensured that the Pin needle does not fall and slide when being turned over and moved after being assembled, and the fixing assembly is removed before the welding starts, which does not affect the welding process of the Pin needle.

[0053] According to the above embodiment, it can be seen that the Pin needle welding tooling and the welding method of the present application can limit the Pin needle by the positioning component during the welding process, ensure the verticality and position degree of the Pin needle, and the backing plate is arranged on the substrate by the spacer assembly, so that the entire welding tooling can ensure the verticality and position degree of the Pin needle after welding while realizing the quick assembly of the Pin needle, and is suitable for mass production. Moreover, by correspondingly arranging multiple sets of backing plates on the spacer assembly and the positioning component, multiple backing plates can be used to weld Pin needles at the same time, which improves the welding production efficiency and manufacturability.

[0054] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pin welding fixture, characterized by, The device comprises a partition assembly and a positioning component, wherein The partition assembly is detachably connected with the substrate and the positioning component respectively; The partition assembly is provided with a first gasket positioning groove matched with a gasket, and the positioning component is correspondingly provided with a second gasket positioning groove matched with the gasket; The positioning component is further provided with a positioning hole matched with a Pin needle; The device further comprises a fixing assembly detachably connected with the positioning component, and the fixing assembly is provided with a positioning structure matched with the Pin needle in an interference fit, wherein the positioning structure comprises an elastic positioning column or a spring structure sleeved on the Pin needle.

2. The pin welding tool of claim 1, wherein, The partition assembly comprises a positioning plate and positioning pins symmetrically arranged on the positioning plate; The positioning plate is provided with the first gasket positioning groove, and the positioning pins are connected with the substrate and the positioning component respectively.

3. The pin welding tool of claim 2, wherein, The positioning pins are threadedly connected with the positioning plate, and the two ends of the positioning pins are connected with the substrate and the positioning component respectively.

4. The pin welding tool of claim 3, wherein, The end of the positioning pin close to the positioning component is provided with a chamfer structure.

5. The pin welding tool of claim 1, wherein, The inner diameter of the positioning structure is 0.05-0.3mm smaller than the width of the top of the Pin needle.

6. A pin welding method using the pin welding tooling of claim 1, characterized by, The device comprises the following steps: S01, arranging the partition assembly on the substrate, arranging a soldering pad on the substrate, and arranging a gasket on the partition assembly; S02, sleeving the positioning component on the Pin needle; S03, connecting the positioning component with the partition assembly; S04, welding the Pin needle.

7. The pin bonding method according to claim 6, wherein The Pin needle welding tool further comprises a fixing assembly, and in the step S02, after the fixing assembly is connected with the positioning component, the Pin needle is arranged on the positioning component and the fixing assembly in sequence; in the step S04, after the fixing assembly is removed, the Pin needle is welded.

Images