A jig for facilitating soldering and a terminal soldering method

Abstract

The present application relates to a kind of jigs and terminal welding method for facilitating welding, jig includes for limiting terminal on the product to be welded on terminal limiting assembly, terminal limiting assembly includes first jig block, limiting piece, second jig block, first jig block is equipped with hollow space and the positioning part compatible with product, hollow space is equipped with the terminal positioning slot for positioning terminal, limiting piece is set on first jig block and can be moved in hollow space relative to first jig block, limiting piece is used to be in abutment with terminal to limit terminal movement;Second jig block is compatible with the product to be welded, second jig block is connected on first jig block, second jig block is opened in hollow space Corresponding to the hole, when terminal is positioned in terminal positioning slot, it can be exposed from the hole.The jig provided by the present application, by setting terminal limiting assembly, terminal can be accurately positioned in the corresponding position of product, and terminal movement can be limited in welding, reduce welding position debugging, improve welding efficiency.

Description

Technical Field

[0001] This invention relates to a fixture and a terminal welding method that facilitates welding. Background Technology

[0002] The terminal is fixed in position on the product to be soldered. The terminal includes a pin, a spring, and a base, with the pin being a pointed tip. If the terminal is placed directly on the product before soldering, it may wobble and deviate from its intended position during soldering, resulting in low soldering accuracy and failing to meet the required precision. Furthermore, poor contact stability between the terminal and the product surface can lead to floating solder joints after soldering, causing insufficient pull-out force and making the terminal prone to loosening. Therefore, a fixture is needed to improve the soldering accuracy of the terminal. Summary of the Invention

[0003] The purpose of this invention is to provide a welding fixture and a terminal welding method that can improve the welding accuracy of terminals.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A welding fixture includes a terminal limiting assembly for positioning terminals on a product to be welded. The terminal limiting assembly includes a first fixture block, a limiting member, and a second fixture block. The first fixture block has a hollow space and a positioning part adapted to the product to be welded. A terminal positioning groove for positioning terminals is provided within the hollow space. The limiting member is disposed on the first fixture block and can move relative to the first fixture block within the hollow space. The limiting member abuts against the terminals to restrict terminal movement. The second fixture block is adapted to the product to be welded and is connected to the first fixture block. An clearance hole is provided in the second fixture block corresponding to the hollow space, allowing the terminals to be exposed when positioned within the terminal positioning groove.

[0006] Preferably, the terminal limiting assembly further includes an elastic element disposed between the limiting element and the second fixture block, the elastic element providing the limiting element with an elastic force in a direction away from the second fixture block.

[0007] Preferably, the limiting member includes a main body and a limiting part. The main body is partially disposed on the first fixture block, and the limiting part is connected to the side of the main body away from the first fixture block. When the terminal is positioned in the terminal positioning groove, the limiting part abuts against the terminal.

[0008] Preferably, the end of the limiting portion away from the main body portion is L-shaped.

[0009] Preferably, the first fixture block has a sliding groove, and the limiting member is partially disposed in the sliding groove; the sliding groove has an opening and an inner wall opposite to the opening, and the width of the opening is smaller than the width of the inner wall.

[0010] Preferably, the second fixture block has a notch for accommodating the first fixture block, and the cross-section of the second fixture block is L-shaped.

[0011] Preferably, the welding-friendly fixture further includes a worktable, a positioning post, and a clamping assembly. The positioning post is disposed on the worktable to support the bottom of the second fixture block, and the clamping assembly is used to press the second fixture block toward the product to be welded to press the terminal onto the product to be welded.

[0012] Preferably, the clamping assembly includes a clamping member and a driving member, wherein the driving member is connected to the clamping member for driving the clamping member to move along its axial direction, and the clamping member abuts against the upper part of the second fixture block.

[0013] Preferably, the second fixture block has a through hole; the clamping member has a receiving groove at one end facing the positioning post, one end of the positioning post is set on the worktable, and the other end passes through the through hole and extends into the receiving groove.

[0014] Preferably, the other end of the positioning post is provided with a bearing, which extends through the through hole of the second fixture block into the receiving groove of the clamping member.

[0015] Another object of the present invention is to provide a terminal welding method, wherein the welding-friendly fixture of the method includes the following steps:

[0016] S1. Position the first fixture block of the terminal limiting assembly upward and the second fixture block below the first fixture block, and insert the pin portion of the terminal downward into the terminal positioning groove of the first fixture block;

[0017] S2. Place the product on the terminal limiting assembly, then flip the whole thing over so that the first fixture block faces down and the second fixture block is on the first fixture block.

[0018] S3. Apply force to the second fixture block to move the limiting member to press the terminal onto the product, and finally weld the terminal exposed in the clearance hole to the product.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] The welding fixture provided by this invention can accurately position the terminal in the corresponding position of the product to be welded by setting a terminal limiting component, which can ensure the perpendicularity of the terminal and restrict the movement of the terminal during welding, reduce the need for welding position adjustment and improve welding efficiency. Attached Figure Description

[0021] Appendix Figure 1 A structural diagram of the welding-friendly fixture provided by the present invention;

[0022] Appendix Figure 2 A structural diagram of a welding-friendly fixture provided by the present invention (with the second fixture block removed);

[0023] Appendix Figure 3 A structural diagram of the first fixture block of the welding-friendly fixture provided by the present invention, which has no terminals;

[0024] Appendix Figure 4 A top view of the first fixture block of the welding-friendly fixture provided by the present invention;

[0025] Appendix Figure 5 A structural diagram of terminals on the first fixture block of the welding-friendly fixture provided by the present invention;

[0026] Appendix Figure 6 Structural diagrams of the first and second fixture blocks of the welding-friendly fixture provided by the present invention, without terminals;

[0027] Appendix Figure 7 A structural diagram of the first fixture block of the welding-friendly fixture provided by the present invention on a product;

[0028] Appendix Figure 8 Structural diagram of the product and terminal limiting assembly of the welding-friendly fixture provided by the present invention;

[0029] Appendix Figure 9 A cross-sectional view of the terminal limiting assembly of the welding-friendly fixture provided by the present invention;

[0030] Appendix Figure 10 A structural diagram of the first fixture block of the welding-friendly fixture provided by the present invention, which has no terminals or limiting members;

[0031] Appendix Figure 11 This is a structural diagram of the terminal;

[0032] Appendix Figure 12 A structural diagram showing a first fixture block connected to a second fixture block of a welding-friendly fixture provided by the present invention;

[0033] Appendix Figure 13 The structural diagram of the second fixture block of the welding-friendly fixture provided by the present invention.

[0034] In the above figures: 1-first fixture block, 11-positioning part, 12-terminal positioning groove, 13-tilting table, 14-slide groove, 2-limiting member, 21-main body, 22-limiting part 22, 3-second fixture block, 31-avoidance hole, 32-extension part, 4-elastic member, 5-worktable, 6-positioning post, 7-clamping member, 8-drive component, 9-bearing, 10-terminal, 101-pin part, 15-product to be welded. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] See Figure 1-9 , Figure 11-12 A welding-friendly fixture is provided, comprising a terminal limiting assembly for positioning the terminal 10 at a designated position on the product 15 to be welded, preventing the terminal 10 from shifting or deviating from its position on the product 15. In this example, the base of the terminal 10 is L-shaped, see [reference needed]. Figure 11 .

[0038] The terminal limiting assembly includes a first fixture block 1, a second fixture block 3, and a limiting member 2. The first fixture block 1 has a terminal positioning groove 12, a sliding groove, and a positioning part 11. The terminal positioning groove 12 is used to position the terminal 10. The terminal positioning groove 12 extends vertically towards the terminal 10. The terminal positioning groove 12 and the sliding groove are arranged opposite to each other, and there is a hollow space between them. The limiting member 2 is disposed in the sliding groove and can move vertically (the length direction of the sliding groove) within the sliding groove. The limiting member 2 is used to abut against the terminal located in the terminal positioning groove 12 to restrict the terminal from moving horizontally. Both the terminal positioning groove 12 and the sliding groove extend vertically. When the terminal is positioned in the terminal positioning groove 12, the extension directions of the terminal positioning groove 12, the sliding groove, and the terminal are consistent. By using the terminal positioning groove 12 and the limiting member 2 to limit the terminal, after placing the terminal limiting assembly on the product 15, the terminal can be positioned in the corresponding position on the product 15 (the correct position for placing the terminal), thereby reducing the need for debugging the welding position (welding after the terminal is in the correct position) and improving welding efficiency.

[0039] Furthermore, the inner contour shape of the terminal positioning groove 12 is adapted to the outer contour shape of the terminal, see [reference]. Figure 3 The terminal positioning groove 12 has arc-shaped grooves on both sides for positioning the two ends of the terminal. An inclined platform 13 may also be provided on the outer side of the first fixture block 1 where the terminal positioning groove 12 is located. (See [reference]) Figure 11 The tilting platform 13 extends downward in a direction away from the terminal positioning groove 12. The cross-section of the tilting platform 13 can be triangular or trapezoidal. The advantages of setting the tilting platform 13 are: firstly, it is convenient for the tip of the terminal to enter the terminal positioning groove 12 from the bottom up through the hollow space, and after the terminal enters the positioning groove, the contact area with the terminal is increased to better position the terminal; secondly, it is convenient to remove the first fixture block 1 from the product after the terminal is soldered to the product, and the verticality of the terminal will not be affected when the first fixture block 1 is removed.

[0040] In this example, the positioning part 11 is adapted to the product 15 to be welded, facilitating the placement of the first fixture block 1 at a designated position on the product 15. For example, the positioning part 11 on the first fixture block 1 may be a through hole, and the product 15 to be welded may have a column. After the through hole on the first fixture block 1 aligns with the column on the product 15 to be welded, the first fixture block 1 is placed on the product 15 to be welded. The position of the terminal positioning groove 12 also corresponds to the position on the product 15 to which the terminal is placed. With the position of the terminal positioning groove 12 determined, the position of the limiting member 2 is also determined.

[0041] The limiting member 2 includes a main body 21 and a limiting part 22. The main body 21 is partially disposed in the slide groove 14, and the limiting part 22 is connected to the side of the main body 21 away from the slide groove 14. When the terminal is positioned in the terminal positioning groove 12, the limiting part 22 abuts against the terminal, and the limiting member 2 restricts the terminal in the horizontal direction, thus restricting the movement of the terminal.

[0042] Furthermore, the end of the limiting part 22 away from the main body part 21 is L-shaped. The L-shaped limiting part 22 can better abut against the terminal located in the terminal positioning groove 12 (the area abutting against the terminal is large, and the limiting effect is better), thus better limiting the shaking of the terminal.

[0043] Furthermore, the groove 14 has an opening, an inner wall opposite to the opening, and an opening width (see...). Figure 4 The width of the inner wall (as indicated by 'a') is less than the width of the inner wall (see [reference]). Figure 4 (as indicated by b) This design facilitates the movement of the limiting member 2 along the slide groove and prevents the limiting member 2 from dislodging from the slide groove.

[0044] The second fixture block 3 is adapted to the product 15 to be welded. The second fixture block 3 is connected to the first fixture block 1. The second fixture block 3 has a clearance hole 31 in the corresponding hollow space. When the terminal is positioned in the terminal positioning groove 12, it can be exposed from the clearance hole 31. At the same time, the terminal is welded from the clearance hole 31.

[0045] Furthermore, the terminal limiting assembly also includes an elastic element 4, which is disposed between the limiting element 2 and the second fixture block 3. The elastic element 4 abuts against the second fixture block 3, and provides the limiting element 2 with an elastic force in a direction away from the second fixture block 3. When the terminal is placed in the terminal positioning groove 12, and the second fixture block 3 is connected to the first fixture block 1 and placed on the product 15, and the product 15 is placed on the worktable 5, a downward force is applied to the second fixture block 3, causing the elastic element 4 to push the limiting element 2 with elastic force, so that the limiting element 2 moves closer to the product 15. This applies pressure towards the product 15 to the terminal positioned between the terminal positioning groove 12 and the limiting element 2, thereby making the product 15 and the terminal fit more closely, reducing the possibility of terminal floating soldering during the welding process. The elastic element further strengthens the vertical pressure of the limiting element on the terminal. The elastic element 4 can be a spring, a spring sheet, etc.

[0046] The second fixture block 3 has a notch for accommodating the first fixture block 1. The cross-section of the second fixture block 3 is L-shaped. In this example, when the terminal limiting assembly is placed on the product 15, a gap is maintained between the second fixture block 3 and the bottom surface of the product 15, and the first fixture block 1 is in contact with the bottom surface of the product 15.

[0047] The first fixture block 1 and the second fixture block 3 are detachably connected, so that the first fixture block 1 and the second fixture block 3 can be separated. For products 15 with different structures, the corresponding first fixture block 1 and the second fixture block 3 can be replaced, without replacing them all, which can save costs.

[0048] In this example, based on the shape of product 15 and the number and position of terminals to be placed, there are two first fixture blocks 1. One, two, three or more limiting members 2 can be placed in the first fixture block 1. There is one second fixture block 3.

[0049] When the first fixture block 1 and the second fixture block 3 are on the product 15 and the terminal is in the terminal positioning groove 12, the product 15 needs to be further positioned before the terminal is welded. The fixture for facilitating welding also includes a worktable 5, a positioning post 6, and a clamping assembly. The positioning post 6 is set on the worktable 5 to support the bottom of the second fixture block 3. The clamping assembly is used to apply a downward force to the second fixture block 3 so that the second fixture block 3 is pressed towards the product 15 to be welded, thereby allowing the limiting member 2 to move downward so that the terminal can be better pressed onto the product 15 to be welded.

[0050] The clamping assembly includes a clamping member 7 and a driving component 8. The driving component 8 is connected to the clamping member 7 and is used to drive the clamping member 7 to move along its axial direction (the axial direction of the clamping member 7 is vertical), so that the clamping member 7 abuts against the upper part of the second fixture block 3. The second fixture block 3 has a through hole; the clamping member 7 has a receiving groove at one end facing the positioning post 6. One end of the positioning post 6 is set on the worktable 5, and the other end passes through the through hole on the second fixture block 3 and extends into the receiving groove of the clamping member 7. When the clamping member 7 moves downward, it can move along the positioning post 6. The positioning post 6 not only plays the role of positioning and supporting the second fixture block 3, but also plays a guiding role. By guiding the first fixture block 1 and the second fixture block 3, it ensures that the terminal can be accurately placed on the product. The limiting member 2 applies a force to the terminal in the direction of the product, ensuring the stability of the contact between the terminal and the product contact surface, reducing the possibility of terminal floating soldering, thereby improving the stability of the pull-out force after terminal welding; at the same time, by limiting the horizontal direction of the terminal by the limiting member, the stability of the perpendicularity of the terminal before and after welding is ensured.

[0051] Furthermore, the diameter of the other end of the positioning post 6 is smaller than the diameter of one end of the positioning post 6. A bearing 9 is provided at the other end of the positioning post 6. The bearing 9 passes through the through hole of the second fixture block 3 and its part extends into the receiving groove of the clamping member 7. Specifically, the bearing 9 can be fixedly set in the through hole of the second fixture block 3. When the clamping member 7 pushes the second fixture block 3 downward, the bearing 9 moves downward along the positioning post 6. Through the cooperation between the positioning post 6 and the bearing 9, friction is reduced, the smoothness of the downward movement of the clamping member 7 is improved, and the accuracy of terminal placement can be improved, thereby ensuring the accuracy of the welding position.

[0052] In this example, extensions 32 are provided on the left and right sides of the second fixture block 3, and through holes are provided on the extensions 32. Two positioning posts 6 and two clamping components are provided. The positioning posts 6 are supported at the bottom of the extensions 32 of the second fixture block 3, and the clamping components 7 are pressed against the upper part of the extensions 32.

[0053] In another embodiment of the present invention, a method for welding terminals onto a product based on the above-described easy-to-weld fixture is provided, comprising the following steps:

[0054] S1. Position the first fixture block of the terminal limiting assembly facing upwards, and place the second fixture block below the first fixture block (see...). Figure 6 Insert the terminal with its pin 101 (tip) facing down and its base facing up into the terminal positioning groove of the first fixture block. "Up" means that the first fixture block is facing the operator and the opening of the terminal positioning groove can be seen.

[0055] S2. Place the product on the terminal limiting assembly, then flip the entire assembly over and place it on the worktable with the first fixture block facing down and the second fixture block on top of the first fixture block. At this point, the product is on the worktable, and the terminal limiting assembly is on the worktable (see attached image). Figure 7 , Figure 8 and Figure 1 );

[0056] S3. Apply force to the second fixture block 3 to move the limiting member to press the terminal onto the product. Finally, solder the terminal exposed in the clearance hole to the product. See [link / reference] Figure 1 , Figure 2 .

[0057] In step S3, the operable clamping member 7 presses down the second fixture block 3 to further clamp the terminal, and then the terminal exposed in the clearance hole 31 is welded to the product 15 by laser welding.

[0058] Finally, remove the terminal limiting assembly from the product and transfer the product to the next process.

[0059] The welding fixture provided by this invention can accurately position the terminal in the corresponding position of the product to be welded by setting a terminal limiting component. During welding, the movement of the terminal can be restricted, reducing the need for welding position adjustment and improving welding efficiency. It can improve the welding size accuracy of the terminal to + / -0.05mm and greatly save labor costs.

[0060] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A welding-friendly fixture, characterized in that, The fixture includes a terminal limiting assembly for limiting terminals on the product to be welded. The terminal limiting assembly includes a first fixture block, a limiting member, and a second fixture block. The first fixture block has a hollow space and a positioning part adapted to the product to be welded. A terminal positioning groove for positioning terminals is provided within the hollow space. The limiting member is disposed on the first fixture block and can move relative to the first fixture block within the hollow space. The limiting member abuts against the terminals to restrict terminal movement. The second fixture block is adapted to the product to be welded and is connected to the first fixture block. The second fixture block has a clearance hole corresponding to the hollow space, allowing the terminals to be exposed when positioned within the terminal positioning groove. The first fixture block is also provided with a sliding groove, and the limiting member is partially disposed in the sliding groove; the sliding groove has a groove opening and an inner wall opposite to the groove opening, and the width of the groove opening is smaller than the width of the inner wall. The terminal limiting assembly further includes an elastic element, which is disposed between the limiting element and the second fixture block, and the elastic element provides the limiting element with an elastic force in a direction away from the second fixture block; The limiting member includes a main body and a limiting part. The main body is partially disposed on the first fixture block, and the limiting part is connected to the side of the main body away from the first fixture block. When the terminal is positioned in the terminal positioning groove, the limiting part abuts against the terminal. The welding-friendly fixture also includes a worktable, a positioning post, and a clamping assembly. The positioning post is set on the worktable to support the bottom of the second fixture block, and the clamping assembly is used to press the second fixture block toward the product to be welded to press the terminal onto the product to be welded.

2. The welding-friendly fixture according to claim 1, characterized in that, The end of the limiting part away from the main body is L-shaped.

3. The welding-friendly fixture according to claim 1, characterized in that, The clamping assembly includes a clamping member and a driving component. The driving component is connected to the clamping member to drive the clamping member to move along its axial direction. The clamping member abuts against the upper part of the second fixture block.

4. The welding-friendly fixture according to claim 3, characterized in that, The second fixture block has a through hole; the clamping member has a receiving groove at one end facing the positioning post, one end of the positioning post is set on the worktable, and the other end passes through the through hole and extends into the receiving groove.

5. The welding-friendly fixture according to claim 4, characterized in that, The other end of the positioning column is provided with a bearing, which extends through the through hole of the second fixture block into the receiving groove of the clamping member.

6. A terminal welding method, characterized in that, This method uses the welding-friendly fixture described in any one of claims 1-5, and includes the following steps: S1. Position the first fixture block of the terminal limiting assembly upward and the second fixture block below the first fixture block, and insert the pin portion of the terminal downward into the terminal positioning groove of the first fixture block; S2. Place the product on the terminal limiting assembly, then flip the whole thing over so that the first fixture block faces down and the second fixture block is on the first fixture block. S3. Apply force to the second fixture block to move the limiting member to press the terminal onto the product, and finally weld the terminal exposed in the clearance hole to the product.

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