Terminal welding jig and method for fixing terminals to be welded on substrate

Abstract

The application provides a terminal welding clamp and a fixing method of terminals to be welded on a substrate. The terminal welding clamp comprises a bottom plate provided with a bottom plate fixing column; a fixing frame provided with a rectangular cavity, a fixing frame opening and suitable for fixing a DBC; the fixing frame is further provided with a fixing frame fixing hole; a support provided with a first opening penetrating through and capable of accommodating a terminal to be vertically inserted from above and to pass through; a first support table is arranged above the outer periphery of the first opening, and first grooves are arranged on both sides of the inner wall and capable of accommodating the upper end of the terminal to be inserted and clamped; a first insertion hole penetrating through is arranged on the side edge of the support and capable of accommodating the terminal to be vertically inserted from above and to pass through; the support is further provided with a support fixing hole; a fixing block is provided with an opening, and the top end of the terminal can be inserted and clamped in the opening; and the fixing block is further provided with a fixing block fixing column. When the support and the bottom plate are assembled, the terminal does not need to be assembled with the support in advance, the working efficiency is high, and the bottom plate and the support with products do not need to be inclined, and there is no risk of terminal falling.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of terminal welding jigs, and particularly relates to a terminal welding jig and a fixing method for terminals to be welded on a substrate. BACKGROUND

[0002] In the packaging welding process of a power module, a process flow including secondary reflow is involved, which involves welding and assembly of products, especially products with terminals. When assembling, the existing terminal welding jig usually needs to be installed in an inverted manner, i.e., the terminal is placed on an inverted support, then the product to be welded with the terminal is placed on the base plate, then one hand holds the base plate and the other hand holds the inverted support, the base plate and the support are slowly inclined, the fixing column of the base plate at the end close to the bottom surface is aligned with the fixing hole of the support, then the base plate and the support are quickly combined to complete the assembly. The Chinese patent document with the publication number CN 221509901 U discloses a needle-shaped terminal welding positioning structure and positioning jig. The needle-shaped terminal welding positioning structure includes a bottom frame and a needle plate assembly. The bottom frame is adapted to place the substrate thereon. The needle plate assembly includes a support plate connected with the bottom frame and a terminal mounting plate connected with the support plate. The support plate is oppositely arranged with the bottom frame in the upward and downward direction. The terminal mounting plate is located between the bottom frame and the needle plate assembly. The terminal mounting plate is provided with a plurality of insertion holes, which are adapted to insert the needle-shaped terminal therein, and the bottom end of the needle-shaped terminal extends from the corresponding insertion hole to be pressed on the substrate. The terminal mounting plate can move relative to the support plate, so that the terminal mounting plate can continuously provide a pressing force on the needle-shaped terminal to press the needle-shaped terminal on the substrate. When welding, the needle-shaped terminal welding positioning structure is inverted, i.e., the support plate is at the bottom, the needle-shaped terminal is inserted into the corresponding insertion hole, and the substrate and the bottom frame are pressed on the needle-shaped terminal, so as to turn the entire needle-shaped terminal welding positioning structure, so that the bottom frame is at the bottom end, and then normal welding operation is performed to ensure that the bottom end of the needle-shaped terminal is in contact with the substrate. This kind of support can solve the problems of terminal welding and fixation. However, this kind of support needs additional time to assemble the terminal with the support in advance, which reduces the assembly efficiency. Moreover, when assembling the support and the base plate, the base plate with the product and the support need to be inclined, which may cause the product to fall, and the operation level of the personnel is required to be high, which is difficult to train. SUMMARY

[0003] The technical problem solved by the present application is to provide a terminal welding jig and a fixing method for terminals to be welded on a substrate. When fixing the terminal, the terminal does not need to be assembled with the support in advance, which improves the assembly efficiency. When assembling the support and the base plate, the base plate with the product and the support do not need to be inclined, which eliminates the risk of terminal falling and simplifies the operation.

[0004] To solve the above problems, one aspect of the present application provides a terminal welding clamp, comprising:

[0005] A bottom plate, four corners of which are respectively provided with a bottom plate fixing column;

[0006] A fixed frame, a rectangular cavity is arranged in the middle of the fixed frame, and the first DBC is adapted to be fixed in the rectangular cavity; a fixed frame opening is arranged on the side edge of the fixed frame, and the second DBC is adapted to be fixed in the fixed frame opening; a fixed frame fixing hole is arranged at each corner of the fixed frame, and the fixed frame fixing hole is matched with the bottom plate fixing column;

[0007] A support, a first opening is arranged in the middle of the support, the first opening can accommodate the first terminal to be vertically inserted from above the support and to pass through the first opening; a first supporting table is arranged above the outer periphery of the first opening, first grooves are arranged on the inner walls of the first supporting table, the upper ends of the first terminal can be inserted into the first grooves and can be clamped in the first grooves, and the bottom end of the first terminal is located at the set position of the first DBC after the first terminal is fixed by the first grooves; a first insertion hole is arranged on the side edge of the support, the first insertion hole can accommodate the second terminal to be vertically inserted from above the support and to pass through the first insertion hole; the first terminal and the second terminal are different types of terminals; a support fixing hole is arranged at each corner of the support, and the support fixing hole is matched with the bottom plate fixing column;

[0008] A fixing block, an opening is arranged on the fixing block, the top end of the second terminal can be inserted into the opening and can be clamped in the opening, and the bottom end of the second terminal is located at the set position of the second DBC after the second terminal is fixed by the opening; a fixing block fixing column is arranged at each end of the fixing block, and the bottom plate fixing column can be inserted into the support fixing hole after being sequentially inserted into the fixed frame fixing hole and the support fixing hole.

[0009] Preferably, the fixed frame comprises:

[0010] The first fixed frame comprises a first wide edge, a first narrow edge and a second narrow edge, the first narrow edge and the second narrow edge are perpendicular to the first wide edge and are respectively connected to both ends of the first wide edge; the fixed frame fixing hole is arranged at both ends of the first wide edge;

[0011] The second fixed frame comprises a second wide side, a third narrow side and a fourth narrow side, the third narrow side and the fourth narrow side are perpendicular to the second wide side and are connected to the two ends of the second wide side respectively; the two ends of the second wide side are provided with the fixed frame fixing holes; the first fixed frame and the second fixed frame are spliced to form the fixed frame, and the rectangular cavity is formed inside.

[0012] Preferably, when the first fixed frame and the second fixed frame are spliced, the first narrow side is connected to the third narrow side, and the second narrow side is connected to the fourth narrow side; the end of the first narrow side away from the first wide side is provided with a first step, the end of the third narrow side away from the second wide side is provided with a second step, and the first step is engaged with the second step; the end of the second narrow side away from the first wide side is provided with a third step, the end of the fourth narrow side away from the second wide side is provided with a fourth step, and the third step is engaged with the fourth step.

[0013] Preferably, the length of the first narrow side is less than the length of the third narrow side, and the length of the second narrow side is greater than the length of the fourth narrow side; the side of the second narrow side close to the rectangular cavity is provided with a first separation strip, and the first separation strip is perpendicular to the second narrow side; the side of the third narrow side close to the rectangular cavity is provided with a second separation strip, and the second separation strip is perpendicular to the third narrow side; the line connecting the first separation strip and the second separation strip can separate the rectangular cavity into two sub-rectangular cavities; the sub-rectangular cavities are respectively suitable for fixing third DBC and fourth DBC; after the first terminal is fixed by the first groove, the bottom end of the first terminal is located at the set position of the third DBC.

[0014] Preferably, the middle part of the support is further provided with a second opening penetrating through, the second opening can accommodate the third terminal to be vertically inserted from above the support and to pass through the second opening; the upper side of the outer periphery of the second opening is provided with a second support table, the inner walls of the second support table are respectively provided with bosses, the bosses and the side walls of the second support table form a second groove, the two sides of the upper end of the third terminal can be inserted into the second groove and can be clamped in the second groove, and after the third terminal is fixed by the second groove, the bottom end of the third terminal is located at the set position of the fourth DBC.

[0015] Preferably, the side of the first wide side, the first narrow side, the second narrow side, the third narrow side and the fourth narrow side close to the rectangular cavity is respectively provided with at least two first arc-shaped protrusions; the length of the first separation strip and the second separation strip extending into the rectangular cavity is greater than the length of the first arc-shaped protrusion extending into the rectangular cavity.

[0016] Preferably, one side of the second wide side close to the rectangular cavity is provided with a recess.

[0017] Preferably, the inner side of each side edge of the fixed frame opening is respectively provided with at least two second arc-shaped protrusions.

[0018] Preferably, the height of the first support table is higher than one half of the height of the first terminal.

[0019] The second aspect of the present application provides a fixing method of a terminal to be welded on a substrate, which is completed by using the terminal welding clamp, and comprises the following steps:

[0020] S1. placing the base plate, placing the substrate on the base plate, and fixing the substrate and the base plate through the fixing holes on the substrate and the fixing columns of the base plate;

[0021] S2. placing the fixed frame on the substrate, and fixing the fixed frame and the base plate through the fixed frame fixing holes and the base plate fixing columns;

[0022] S3. placing the tin sheet and the first DBC in the rectangular cavity of the fixed frame in sequence, and fixing the positions of the tin sheet and the first DBC through the rectangular cavity; placing the tin sheet and the second DBC in the fixed frame opening of the fixed frame in sequence, and fixing the positions of the tin sheet and the second DBC through the fixed frame opening;

[0023] S4. placing the support on the fixed frame, fixing the support and the base plate through the support fixing holes of the support and the base plate fixing columns of the base plate, and placing the first support table of the support upward;

[0024] S5. vertically inserting the first terminal into the first opening from above the support and out of the first opening, so that the bottom end of the first terminal is located at the set position of the first DBC; and vertically inserting the second terminal into the first insertion hole from above the support and out of the first insertion hole, so that the bottom end of the second terminal is located at the set position of the second DBC;

[0025] S6. placing the fixed block above the support and directly above the first insertion hole, inserting the upper end of the second terminal into the opening on the fixed block, fixing the fixed block and the support through the support fixing holes and the fixed block fixing columns, and fixing the top end of the second terminal through the opening.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The terminal welding clamp of the present application, when fixing the terminal, the bracket is fixed with the bottom plate and the fixed frame, the terminal is directly inserted into the opening or the jack of the bracket from the top, the bottom is in contact with the DBC in the fixed frame, and the terminal is fixed through the bracket or the fixed block, without assembling the terminal and the bracket in advance, the assembly efficiency is improved, when assembling the bracket and the bottom plate, the bottom plate and the bracket with the product do not need to be inclined, there is no risk of terminal falling, the operation is simple, and the operation level is not high. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the terminal welding clamp described in the embodiment of the present application;

[0029] Figure 2 is a structural schematic diagram of the bottom plate in the terminal welding clamp described in the embodiment of the present application;

[0030] Figure 3 is a top view of the fixed frame in the terminal welding clamp described in the embodiment of the present application;

[0031] Figure 4 is a top view of the bracket in the terminal welding clamp described in the embodiment of the present application;

[0032] Figure 5 is a top view of the fixed block in the terminal welding clamp described in the embodiment of the present application.

[0033] Wherein: 1-bottom plate; 11-bottom plate fixed column; 2-fixed frame; 21-rectangular cavity; 22-fixed frame opening; 23-fixed frame fixed hole; 24-first fixed frame; 241-first wide side; 242-first narrow side; 243-second narrow side; 25-second fixed frame; 251-second wide side; 252-third narrow side; 253-fourth narrow side; 26-first step; 27-second step; 28-third step; 29-fourth step; 210-first separation strip; 211-second separation strip; 212-sub-rectangular cavity; 213-sub-rectangular cavity; 214-first arc-shaped protrusion; 215-recess; 216-second arc-shaped protrusion; 3-bracket; 31-first opening; 32-first support table; 33-first groove; 34-first jack; 35-bracket fixed hole; 36-second opening; 37-second support table; 38-convex table; 39-second groove; 4-fixed block; 41-opening; 42-fixed block fixed column; 5-first terminal; 6-second terminal; 7-third terminal; 8-substrate. DETAILED DESCRIPTION

[0034] The technical solutions of the present application will be described clearly and completely below in combination with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. Embodiment 1

[0035] As shown in the figure, the terminal welding clamp of the present embodiment comprises: Figure 1 A bottom plate 1, four bottom plate fixing columns 11 are arranged at the four corners of the bottom plate 1 respectively;

[0036] A fixed frame 2, a rectangular cavity 21 is arranged in the middle of the fixed frame 2, and the first DBC is adapted to be fixed in the rectangular cavity 21; a fixed frame opening 22 is arranged on the side edge of the fixed frame 2, and the second DBC is adapted to be fixed in the fixed frame opening 22; a fixed frame fixing hole 23 is arranged at each of the four corners of the fixed frame 2, and the fixed frame fixing hole 23 is matched with the bottom plate fixing column 11;

[0037] A support 3, as shown in the figure, a first opening 31 is arranged in the middle of the support 3, the first opening 31 can accommodate the first terminal 5 to be vertically inserted from above the support 3 and to pass through the first opening 31; a first support table 32 is arranged above the outer periphery of the first opening 31, first recesses 33 are arranged on the inner walls of the first support table 32, the two sides of the upper end of the first terminal 5 can be inserted into the first recesses 33 and can be clamped in the first recesses 33, after the first terminal 5 is fixed by the first recesses 33, the bottom end of the first terminal 5 is located at the designated position of the first DBC; a first insertion hole 34 is arranged on the side edge of the support 3, the first insertion hole 34 can accommodate the second terminal 6 to be vertically inserted from above the support 3 and to pass through the first insertion hole 34; the first terminal 5 and the second terminal 6 are different types of terminals; a support fixing hole 35 is arranged at each of the four corners of the support 3, and the support fixing hole 35 is matched with the bottom plate fixing column 11;

[0038] Figure 4 A fixed block 4, as shown in the figure, an opening 41 is arranged on the fixed block 4, the top end of the second terminal 6 can be inserted into the opening 41 and can be clamped in the opening 41, after the second terminal 6 is fixed by the opening 41, the bottom end of the second terminal 6 is located at the designated position of the second DBC; a fixed block fixing column 42 is arranged at each end of the fixed block 4, after the bottom plate fixing column 11 is sequentially inserted into the fixed frame fixing hole 23 and the support fixing hole 35, the fixed block fixing column 42 can be inserted into the support fixing hole 35.

[0039] Figure 5

[0040] ​​​For the terminal which can be inserted into the groove on the upper two sides for fixation, the first terminal fixing method can be used, inserted into the first opening of the support, and fixed through the first groove. For the terminal structure which cannot be inserted into the groove on the upper two sides for fixation, for example, the edges on the upper two sides are not vertical structures, but are inclined sides, and the top can be inserted into the opening, the second terminal fixing method can be used, inserted into the first insertion hole, and the top end of the second terminal is fixed through the opening on the fixing block.

[0041] In use of the terminal welding clamp of the embodiment, first, the bottom plate is placed on the anti-static table, the substrate is placed on the bottom plate, and the substrate is fixed with the bottom plate through the fixing holes on the substrate and the fixed columns on the bottom plate; then the fixed frame is placed on the substrate, and the fixed frame is fixed with the bottom plate through the fixed frame fixing holes and the fixed columns on the bottom plate; then the tin sheet and the first DBC are sequentially placed in the rectangular cavity of the fixed frame, and the tin sheet and the first DBC are fixed in position through the rectangular cavity; the tin sheet and the second DBC are sequentially placed in the fixed frame opening of the fixed frame, and the tin sheet and the second DBC are fixed in position through the fixed frame opening; the support is placed on the fixed frame, and the support is fixed with the bottom plate through the support fixing holes and the fixed columns on the bottom plate, and one side of the first support table of the support faces upward; the first terminal is vertically inserted into the first opening from the top of the support and passes out of the first opening, and the bottom end of the first terminal is located at the set position of the first DBC; the second terminal is vertically inserted into the first insertion hole from the top of the support and passes out of the first insertion hole, and the bottom end of the second terminal is located at the set position of the second DBC; finally, the fixing block is placed above the support and directly above the first insertion hole, the top end of the second terminal is inserted into the opening on the fixing block, the fixing block is fixed with the support through the support fixing holes and the fixed columns on the fixing block, the upper end of the second terminal is fixed through the opening, the fixation of the terminal is completed, and then welding can be performed.

[0042] In the prior art, when the terminal welding fixture fixes the terminal, the inverted mode is adopted, that is, the positioning structure for fixing the needle-shaped terminal is first inverted, the needle-shaped terminal is inserted into the corresponding insertion hole from the top (that is, from the bottom of the positioning structure), the substrate and the bottom frame are crimped on the needle-shaped terminal, the positioning structure for fixing the needle-shaped terminal is turned over, and then normal welding operation is performed to ensure that the bottom end of the needle-shaped terminal is always in contact with the substrate. This fixing method requires that the terminal be assembled with the positioning structure in advance, which is low in work efficiency, and more importantly, when the positioning structure is assembled with the bottom plate, the bottom plate and the bracket with the product need to be inclined, and the product is at risk of falling. When the terminal welding fixture of the embodiment fixes the terminal, after the bracket is fixed with the bottom plate and the fixed frame, the terminal is directly inserted into the opening or insertion hole of the bracket from the top, the bottom is in contact with the DBC in the fixed frame, and the terminal is fixed through the bracket or fixed block, without the need to assemble the terminal with the bracket in advance, which improves the assembly work efficiency, and when the bracket is assembled with the bottom plate, the bottom plate and the bracket with the product do not need to be inclined, and there is no risk of terminal falling, which is simple to operate and does not require high operation level.

[0043] The specific shape of the first opening can be designed according to the shape of the corresponding first terminal, as long as the first terminal can be inserted from above the first opening to the bottom end in contact with the corresponding DBC. According to the number of terminals actually designed, a plurality of first openings can be provided; and two, three or more first terminals can also be inserted into the first opening at the same time, and the shape and size of the first opening can be adjusted according to the number of inserted terminals.

[0044] The number and position of the first grooves can be set by those skilled in the art according to different terminal models and specifications, which are not limited here.

[0045] The size and position of the opening 41 on the fixed block 4 can be set according to the actual needs of the product.

[0046] Preferably, as shown in Figure 3 The fixed frame 2 includes:

[0047] The first fixed frame 24 includes a first wide side 241, a first narrow side 242 and a second narrow side 243, the first narrow side and the second narrow side are perpendicular to the first wide side and are connected to both ends of the first wide side respectively; the both ends of the first wide side are provided with fixed frame fixing holes 23;

[0048] The second fixed frame 25 includes a second wide side 251, a third narrow side 252 and a fourth narrow side 253, the third narrow side and the fourth narrow side are perpendicular to the second wide side and are connected to both ends of the second wide side respectively; the both ends of the second wide side are provided with fixed frame fixing holes; the first fixed frame and the second fixed frame are spliced to form the fixed frame, and a rectangular cavity 21 is formed inside.

[0049] The two-part half frame is combined to form the fixed frame, and after the product is welded, the two-part half frame is opened to detach the product, so that the product in the fixed frame can be more conveniently detached.

[0050] Preferably, when the first fixed frame 24 and the second fixed frame 25 are combined, the first narrow side is connected with the third narrow side, and the second narrow side is connected with the fourth narrow side; the end of the first narrow side away from the first wide side is provided with a first step 26, the end of the third narrow side away from the second wide side is provided with a second step 27, and the first step and the second step are engaged; the end of the second narrow side away from the first wide side is provided with a third step 28, the end of the fourth narrow side away from the second wide side is provided with a fourth step 29, and the third step and the fourth step are engaged. Through the arrangement of the engaged steps, the first fixed frame and the second fixed frame can be better positioned and aligned when combined.

[0051] Preferably, the length of the first narrow side is less than the length of the third narrow side, and the length of the second narrow side is greater than the length of the fourth narrow side; the side of the second narrow side close to the rectangular cavity is provided with a first partition strip 210, and the first partition strip is perpendicular to the second narrow side; the side of the third narrow side close to the rectangular cavity is provided with a second partition strip 211, and the second partition strip is perpendicular to the third narrow side; the line connecting the first partition strip 210 and the second partition strip can divide the rectangular cavity into two sub-rectangular cavities 212 and 213; the sub-rectangular cavities are respectively suitable for fixing the third DBC and the fourth DBC; after the first terminal is fixed by the first groove, the bottom end of the first terminal is located at the specified position of the third DBC. The narrow sides of the fixed frame are divided into two half frames in an unequal manner, so that the two partition strips are respectively located on the two half frames, and after welding, the two DBCs in the rectangular cavity are more easily detached. The arrangement of the partition strips can prevent the two DBCs from contacting due to the melting of the tin sheet during reflow of the product, thereby preventing the product from failing.

[0052] Preferably, the first fixed frame and the second fixed frame are symmetric about the center of the rectangular cavity, that is, the length of the first narrow side is equal to the length of the fourth narrow side, and the length of the second narrow side is equal to the length of the third narrow side.

[0053] Preferably, the first partition strip and the second partition strip are as short and thin as possible, and their functions are to effectively prevent the contact between the adjacent two DBCs and to reduce the contact area between the fixed frame and the DBCs.

[0054] Preferably, the middle part of the bracket 3 is also provided with a second through opening 36, which can accommodate the vertical insertion of the third terminal 7 from above the bracket 3 and through the second opening 36; the outer periphery of the second opening 36 is provided with a second support table 37, the inner wall of the second support table 37 is provided with a boss 38 on both sides, the boss and the side wall of the second support table form a second groove 39, the two sides of the upper end of the third terminal 7 can be inserted into the second groove 39 and can be clamped in the second groove, after the third terminal is fixed by the second groove, the bottom end of the third terminal is located at the set position of the fourth DBC. The third terminal can be a terminal type different from the first terminal and the second terminal. The specific shape of the second opening can be designed according to the shape of the corresponding third terminal, as long as the third terminal can be inserted from above the second opening to the bottom end in contact with the corresponding DBC. According to the actual number of terminals designed, multiple second openings can be provided.

[0055] Preferably, the inner side of the second groove can be chamfered to reduce the contact area between the terminal and the bracket and facilitate disassembly.

[0056] Preferably, the side of the first wide side, the first narrow side, the second narrow side, the third narrow side, and the fourth narrow side close to the rectangular cavity is provided with at least two first arc-shaped protrusions 214; the length of the first partition strip and the second partition strip extending into the rectangular cavity is greater than the length of the first arc-shaped protrusion extending into the rectangular cavity. The arrangement of the arc-shaped protrusions can reduce the contact area between the narrow side and the DBC, making it easier to disassemble the fixed frame from the product after reflow, and avoiding damage to the product caused by manual disassembly.

[0057] Preferably, the side of the second wide side 251 close to the rectangular cavity is provided with a concave table 215. The arrangement of the concave table can reduce the contact area between the second wide side and the DBC, making it easier to disassemble the fixed frame from the product after reflow, and avoiding damage to the product caused by manual disassembly.

[0058] Preferably, the inner side of each side of the fixed frame opening 22 is provided with at least two second arc-shaped protrusions 216. The arrangement of the arc-shaped protrusions can reduce the contact area between the fixed frame opening and the DBC, making it easier to disassemble the fixed frame from the product after reflow, and avoiding damage to the product caused by manual disassembly.

[0059] Preferably, the height of the first support table 32 is higher than one half of the height of the first terminal 5. The support effect on the terminal is guaranteed.

[0060] Preferably, the height of the second support table 37 is higher than one half of the height of the third terminal 7. The support effect on the terminal is guaranteed.

[0061] Preferably, as shown in Figure 2 the bottom plate 1 is a rectangular planar structure, the four corners are rounded, and one bottom plate fixing column 11 is arranged at each of the four corners, and the heights of the four bottom plate fixing columns 11 are the same.

[0062] Preferably, the bracket 3 is a rectangular structure, and the four corners are provided with bracket fixing holes 35 matched with the bottom plate fixing columns on the bottom plate 1, so that the bracket can be fixed on the bottom plate.

[0063] Preferably, the fixing block 4 is a long rectangular shape, and two fixing block fixing columns are arranged thereon, which can be matched with the bracket fixing holes on the bracket to realize the fixation of the fixing block and the bracket.

[0064] Preferably, the second terminal is inserted into the opening of the fixing block to a position, and the exposed part of the fixing block is not greater than 3mm. Embodiment 2

[0065] The fixing method of the terminal to be welded on the substrate in this embodiment is completed by using the terminal welding clamp described above, and includes the following steps:

[0066] S1. Place the bottom plate on the anti-static table, place the substrate 8 on the bottom plate, and fix the substrate and the bottom plate through the fixing holes on the substrate and the bottom plate fixing columns;

[0067] S2. Place the first fixing frame and the second fixing frame on the substrate, and correspond the fixing holes on the first fixing frame and the second fixing frame with the bottom plate fixing columns one by one, and fix the fixing frame and the bottom plate through the fixing frame fixing holes and the bottom plate fixing columns;

[0068] S3. Place the tin sheet and the first DBC in the rectangular cavity of the fixing frame in sequence, and fix the positions of the tin sheet and the first DBC through the rectangular cavity; place the tin sheet and the second DBC in the fixing frame opening of the fixing frame in sequence, and fix the positions of the tin sheet and the second DBC through the fixing frame opening;

[0069] S4. Place the bracket on the fixing frame, and fix the bracket and the bottom plate through the bracket fixing holes of the bracket and the bottom plate fixing columns of the bottom plate, and the side of the bracket provided with the first support table and the second support table faces upward;

[0070] S5. Insert the first terminal vertically from above the bracket into the first opening and out of the first opening, and the bottom end of the first terminal is located at the set position of the first DBC; insert the second terminal vertically from above the bracket into the first insertion hole and out of the first insertion hole, and the bottom end of the second terminal is located at the set position of the second DBC;

[0071] S6. Place the fixing block above the bracket and directly above the first insertion hole, insert the upper end of the second terminal into the opening on the fixing block, fix the fixing block and the bracket through the bracket fixing holes and the fixing block fixing columns, and fix the top end of the second terminal through the opening;

[0072] S7. The assembly is completed, and the next process is prepared.

[0073] Obviously, the above-mentioned embodiments are only examples for clearly illustrating the present application, but not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or variations derived from the above description are still within the protection scope of the present application.

Claims

1. A terminal welding fixture, characterized in that, include: A base plate, wherein base plate fixing posts are provided at the four corners of the base plate; A fixed frame is provided, with a rectangular cavity in the middle, which is suitable for fixing a first DBC; a fixed frame opening is provided on the side of the fixed frame, which is suitable for fixing a second DBC; and fixed frame fixing holes are provided at the four corners of the fixed frame, which cooperate with the base plate fixing posts. The bracket has a through-hole in its center, which allows a first terminal to be vertically inserted into and exit the bracket from above. A first support platform is located above the outer periphery of the first opening. The inner walls of the first support platform have first grooves on both sides, allowing the upper ends of the first terminal to be inserted into and locked within these grooves. After being fixed by the first grooves, the bottom end of the first terminal is positioned at the designated location of the first DBC. A through-hole is located on the side of the bracket, allowing a second terminal to be vertically inserted into and exit the bracket from above. The first and second terminals are of different types. Bracket fixing holes are located at the four corners of the bracket, and these fixing holes cooperate with the base plate fixing posts. The fixing block has an opening, the top end of the second terminal can be inserted into the opening and can be locked in the opening. After the second terminal is fixed by the opening, the bottom end of the second terminal is located at the set position of the second DBC. The fixing block has fixing posts at both ends. After the bottom plate fixing posts are inserted into the fixing holes of the fixing frame and the fixing holes of the bracket in sequence, the fixing block fixing posts can be inserted into the fixing holes of the bracket.

2. The terminal welding fixture according to claim 1, characterized in that, The fixed frame includes: A first fixing frame, comprising a first wide side, a first narrow side, and a second narrow side, wherein the first narrow side and the second narrow side are perpendicular to the first wide side and are respectively connected to both ends of the first wide side; fixing holes of the fixing frame are provided at both ends of the first wide side; The second fixing frame includes a second wide side, a third narrow side, and a fourth narrow side. The third narrow side and the fourth narrow side are perpendicular to the second wide side and are respectively connected to both ends of the second wide side. Fixing holes of the fixing frame are provided at both ends of the second wide side. The first fixing frame and the second fixing frame are assembled to form the fixing frame, and the rectangular cavity is formed inside.

3. The terminal welding fixture according to claim 2, characterized in that: When the first fixed frame and the second fixed frame are assembled, the first narrow side is connected to the third narrow side, and the second narrow side is connected to the fourth narrow side; the end of the first narrow side away from the first wide side is provided with a first step, and the end of the third narrow side away from the second wide side is provided with a second step, and the first step and the second step are engaged; the end of the second narrow side away from the first wide side is provided with a third step, and the end of the fourth narrow side away from the second wide side is provided with a fourth step, and the third step and the fourth step are engaged.

4. The terminal welding fixture according to claim 3, characterized in that: The length of the first narrow side is less than the length of the third narrow side, and the length of the second narrow side is greater than the length of the fourth narrow side; a first dividing strip is provided on the side of the second narrow side near the rectangular cavity, and the first dividing strip is perpendicular to the second narrow side; a second dividing strip is provided on the side of the third narrow side near the rectangular cavity, and the second dividing strip is perpendicular to the third narrow side; the line connecting the first dividing strip and the second dividing strip can divide the rectangular cavity into two sub-rectangular cavities; the third DBC and the fourth DBC are respectively adapted to be fixed in the sub-rectangular cavities; after the first terminal is fixed by the first groove, the bottom end of the first terminal is located at the set position of the third DBC.

5. The terminal welding fixture according to claim 4, characterized in that: The bracket also has a through second opening in the middle, which can accommodate the third terminal to be vertically inserted into and out of the bracket from the top. A second support platform is provided above the outer periphery of the second opening. The inner walls of the second support platform are respectively provided with protrusions. The protrusions and the side walls of the second support platform form a second groove. The upper ends of the third terminal can be inserted into the second groove and can be locked in the second groove. After the third terminal is fixed by the second groove, the bottom end of the third terminal is located at the set position of the fourth DBC.

6. The terminal welding fixture according to claim 4, characterized in that: Each of the first wide side, the first narrow side, the second narrow side, the third narrow side, and the fourth narrow side has at least two first arc-shaped protrusions on the side closest to the rectangular cavity; the length of the first separator and the second separator extending into the rectangular cavity is greater than the length of the first arc-shaped protrusion extending into the rectangular cavity.

7. The terminal welding fixture according to claim 4, characterized in that: A recessed platform is provided on the side of the second wide side near the rectangular cavity.

8. The terminal welding fixture according to claim 4, characterized in that: At least two second arc-shaped protrusions are provided on the inner side of each side of the opening of the fixed frame.

9. The terminal welding fixture according to claim 1, characterized in that: The height of the first support platform is more than half the height of the first terminal.

10. A method for fixing terminals to be soldered on a substrate, characterized in that, The process, performed using the terminal welding fixture as described in any one of claims 1-9, includes the following steps: S1. Place the base plate, place the substrate on the base plate, and fix the substrate to the base plate through the fixing holes on the substrate and the fixing posts of the base plate; S2. Place the fixing frame on the base plate, and fix the fixing frame to the base plate through the fixing holes of the fixing frame and the fixing posts of the base plate; S3. Place the solder sheet and the first DBC in the rectangular cavity of the fixing frame in sequence, and fix the position of the solder sheet and the first DBC through the rectangular cavity; place the solder sheet and the second DBC in the fixing frame opening in sequence, and fix the position of the solder sheet and the second DBC through the fixing frame opening; S4. Place the bracket on the fixed frame, and fix the bracket to the base plate through the bracket fixing hole of the bracket and the base plate fixing post of the base plate, with the side of the bracket facing upwards from the first support platform; S5. Insert the first terminal vertically into the first opening from above the bracket and through the first opening until the bottom end of the first terminal is located at the set position of the first DBC; insert the second terminal vertically into the first socket from above the bracket and through the first socket until the bottom end of the second terminal is located at the set position of the second DBC; S6. Place the fixing block above the bracket and directly above the first insertion hole, so that the upper end of the second terminal is inserted into the opening on the fixing block, and fix the fixing block to the bracket through the bracket fixing hole and the fixing block fixing post, and fix the top end of the second terminal through the opening.

Images