A fool-proof jig for terminal welding jig

Abstract

The utility model relates to the technical field of semiconductor packaging, and specifically discloses a terminal welding clamp foolproof fixture, which comprises, from bottom to top, a copper substrate positioning plate, a copper substrate pressing plate, a terminal foolproof plate and a terminal welding positioning clamp, which are sequentially and layer by layer arranged. The copper substrate positioning plate is provided with a plurality of positioning grooves and at least two positioning columns. The upper end surface of the copper substrate positioning plate is provided with two locking buckles. The physical foolproof structure forcibly ensures the correct direction during the terminal insertion process, thereby eliminating the major quality risks caused by 180-degree direction misinsertion from the source, reducing the process complexity and detection cost. The utility model effectively avoids the product scrapping after welding due to the direction error and the material waste caused by the secondary detection of the defects. The utility model greatly improves the product yield and the production line pass rate. The overall structure is rationally designed, accurate and reliable in positioning, and easy to operate, thereby effectively solving the problems of strong dependence on manual operation and limited function of the traditional fixture.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor packaging technology, and specifically discloses a terminal welding fixture to prevent mistaken fitting. Background Technology

[0002] In the field of electronic component manufacturing, the soldering of copper substrates to terminals is a critical production step for products such as connectors and power modules. In traditional soldering processes, operators must manually insert the terminals into pre-drilled solder joints on the copper substrate and then fix them in place using wave soldering or reflow soldering. This process is highly dependent on manual positioning accuracy, especially in mass production where the consistency of orientation for hundreds of terminals must be ensured. Existing technologies generally use simple positioning fixtures to assist assembly, but their function is mainly limited to substrate fixation and solder joint positioning calibration.

[0003] However, due to the inherent symmetry or subtle directional features (such as chamfers and snap-fits) in the terminal structure, manual operation can easily result in 180° misinsertion. Such errors are difficult to visually identify after soldering, leading to electrical performance failures that are irreparable. Current solutions often involve adding a power-on testing step after soldering, but this fails to eliminate the error at its source. Instead, it results in material waste due to secondary scrapping and significantly reduces production line efficiency. Utility Model Content

[0004] This utility model proposes a terminal welding fixture to prevent incorrect insertion. Through a physical error-proof structure, it ensures the correct orientation during terminal insertion, thus eliminating the major quality hazard caused by incorrect insertion at 180 degrees.

[0005] This utility model is implemented as follows: a terminal welding fixture anti-foolproof jig includes: a copper substrate positioning plate, a copper substrate pressure plate, a terminal anti-foolproof plate, and a terminal welding positioning fixture stacked sequentially from bottom to top. The copper substrate positioning plate is provided with multiple positioning grooves and at least two positioning posts; The upper end face of the copper substrate positioning plate is provided with two locking buckles; The terminal anti-mistake plate has a positioning hole adapted to the positioning post on its outer wall, as well as an asymmetrical anti-mistake hole group. The position of the anti-mistake hole group corresponds to the welding point of the positioning groove. The terminal welding positioning fixture is composed of multiple layers of positioning plates. Each layer is provided with through holes and through holes that cooperate with the positioning posts. The axis of the through holes coincides with the anti-fool hole group.

[0006] As a preferred embodiment of the terminal welding fixture for preventing mistakes according to this utility model, the cross-section of the anti-mistake hole group is an asymmetrical polygon.

[0007] As a preferred embodiment of the terminal welding fixture for preventing mistaken insertion according to this utility model, the locking buckle includes a pivot pin fixed on the positioning plate of the copper substrate, and a locking plate is rotatably connected to the outer wall of the pivot pin.

[0008] As a preferred embodiment of the terminal welding fixture for error prevention in this utility model, the terminal welding positioning fixture comprises three independent positioning plates, the diameter of which decreases from top to bottom, forming a stepped guide channel.

[0009] As a preferred terminal welding fixture for error prevention according to this utility model, the number of positioning posts is six, which are symmetrically distributed at the four corners and the middle of the long side of the copper substrate positioning plate.

[0010] As a preferred embodiment of the terminal welding fixture anti-mistake jig of this utility model, the positioning post penetrates the terminal anti-mistake plate and the terminal welding positioning fixture to form a vertical positioning reference.

[0011] The beneficial effects of this utility model are: This fixture, through its physical error-proof structure, forcibly ensures correct orientation during terminal insertion, eliminating major quality risks caused by incorrect 180-degree insertion at the source. It significantly reduces or even eliminates the need for subsequent power-on testing, lowering process complexity and testing costs. It effectively avoids product scrapping due to incorrect orientation after welding and material waste caused by defects discovered during secondary testing, significantly reducing material loss and production costs. It greatly improves product yield and production line first-pass yield, ensuring efficiency in mass production and reliability of product electrical connections. The overall structural design is reasonable, with precise and reliable positioning and simple operation, effectively solving the problems of high dependence on manual operation and the functional limitations of traditional fixtures. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a structural diagram of the copper substrate positioning plate of this utility model; Figure 3 This is a structural diagram of the copper substrate pressure plate of this utility model in its installation state; Figure 4 This is a structural diagram of the terminal anti-foolproof plate of this utility model in its installation state.

[0014] The markings in the diagram are: 1. Copper substrate positioning plate; 2. Copper substrate pressure plate; 3. Positioning groove; 4. Terminal anti-fool plate; 5. Welding positioning fixture; 6. Positioning post; 7. Through hole; 8. Locking buckle; 9. Positioning hole; 10. Anti-fool hole group; 11. Through hole; 12. Turning pin; 13. Locking plate. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0016] Please see Figure 1-4 A terminal welding fixture anti-mistake jig includes: a copper substrate positioning plate 1, a copper substrate pressure plate 2, a terminal anti-mistake plate 4, and a terminal welding positioning fixture 5, which are stacked sequentially from bottom to top. The copper substrate positioning plate 1 is provided with multiple positioning grooves 3 and at least two positioning posts 6; Two locking buckles 8 are provided on the upper end face of the copper substrate positioning plate 1; The outer wall of the terminal anti-fool plate 4 is provided with a positioning hole 9 that is adapted to the positioning post 6, and an asymmetrical anti-fool hole group 10. The position of the anti-fool hole group 10 corresponds to the welding point of the positioning groove 3. The terminal welding positioning fixture 5 is composed of multiple layers of positioning plates. Each layer is provided with a through hole 11 and a through hole 7 that cooperate with the positioning post 6. The axis of the through hole 7 coincides with the anti-fool hole group 10.

[0017] In this embodiment: When the foolproof fixture is working, the copper substrate is first placed in the positioning groove 3 of the copper substrate positioning plate 1, and the copper substrate pressure plate 2 covers it for initial fixation; the terminal foolproof plate 4 is precisely positioned on the positioning post 6 through its positioning hole 9, and its asymmetrical foolproof hole group 10 strictly corresponds to the position of the substrate solder joint; the terminal welding positioning fixture 5 is also stacked and fixed on the positioning post 6 through the through hole 11, and the axis of the through hole 7 formed by its multi-layer stacking coincides with the foolproof hole group 10; when the operator inserts the terminal into the through hole 7, it must strictly match the shape of the asymmetrical foolproof hole group 10 to pass through, thereby ensuring that the terminal orientation is correct and fundamentally eliminating the occurrence of 180-degree misinsertion.

[0018] As a technical optimization of this utility model, the cross-section of the anti-fool hole group 10 is an asymmetrical polygon.

[0019] In this embodiment, the cross-section of the anti-fool hole group 10 adopts an asymmetrical polygonal design. By utilizing the unique matching between the terminal's own minute directional features (such as specific chamfers or snap positions) and the hole shape, it is ensured that only terminals with the correct orientation can be inserted smoothly, thus achieving physical anti-fooling.

[0020] As a technical optimization of this utility model, the locking buckle 8 includes a pivot pin 12 fixed on the copper substrate positioning plate 1, and a locking plate 13 is rotatably connected to the outer wall of the pivot pin 12.

[0021] In this embodiment: the locking buckle 8 is connected to the locking plate 13 via the pivot pin 12, which can rotate and press the superimposed copper substrate pressure plate 2, providing a stable and reliable clamping force to ensure that the position is stable and does not shift during operation and welding.

[0022] As a technical optimization of this utility model, the terminal welding positioning fixture 5 includes three independent positioning plates, the diameter of the through holes 7 decreases from top to bottom, forming a stepped guide channel.

[0023] In this embodiment, the terminal welding positioning fixture 5 is composed of three independent positioning plates stacked together, and the diameter of its through hole 7 decreases from top to bottom to form a stepped guide channel, which guides the terminal to accurately align with the anti-fool hole group 10 and finally reach the substrate solder point, effectively improving the smoothness and positioning accuracy of terminal insertion.

[0024] As a technical optimization of this utility model, the number of positioning posts 6 is six, which are symmetrically distributed at the four corners and the middle of the long side of the copper substrate positioning plate 1.

[0025] In this embodiment, six positioning posts 6 are symmetrically distributed at the four corners and the middle of the long side of the copper substrate positioning plate 1, providing sufficient and balanced positioning points to ensure that the entire fixture system, especially the large copper substrate, maintains extremely high flatness and positional accuracy during the stacking and assembly process.

[0026] As a technical optimization of this utility model, the positioning post 6 penetrates the terminal anti-fool plate 4 and the terminal welding positioning fixture 5 to form a vertical positioning reference.

[0027] In this embodiment: the positioning post 6 penetrates the terminal anti-fool plate 4 and the terminal welding positioning fixture 5 to form a vertical positioning reference, ensuring that all functional layer holes (positioning groove 3, anti-fool hole group 10, through hole 7) are strictly aligned in the height direction.

[0028] The working principle and usage process of this utility model are as follows: The copper substrate is precisely placed into the pre-set positioning groove 3 on the copper substrate positioning plate 1; then the copper substrate pressure plate 2 is placed on top; next, the terminal anti-misalignment plate 4 is stacked on the positioning post 6 through its positioning hole 9, so that its asymmetric anti-misalignment hole group 10 is precisely aligned with the solder joint position of the copper substrate below; then, the terminal welding positioning fixture 5 is stacked on the positioning post 6 through its through hole 11, and the axis of the through hole 7 (the hole diameter decreases from top to bottom) formed by its multiple layers is strictly coincident with the anti-misalignment hole group 10; the operator attempts to insert the terminal into the through hole 7 at the top of the terminal welding positioning fixture 5. Only when the terminal direction completely matches the cross-sectional shape of the asymmetric anti-misalignment hole group 10 can it pass smoothly through the anti-misalignment hole group 10 and finally be inserted into the copper substrate solder joint; terminals with incorrect orientation will be blocked by the anti-misalignment hole group 10 and cannot pass through; after all terminals are correctly inserted, the fixture can be removed for subsequent welding processes.

[0029] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0030] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A terminal welding fixture with error-proofing features, characterized in that: include: The copper substrate positioning plate (1), copper substrate pressure plate (2), terminal anti-fool plate (4), and terminal welding positioning fixture (5) are stacked sequentially from bottom to top. The copper substrate positioning plate (1) is provided with multiple positioning grooves (3) and at least two positioning posts (6). The upper end face of the copper substrate positioning plate (1) is provided with two locking buckles (8). The terminal anti-fool plate (4) has a positioning hole (9) adapted to the positioning post (6) on its outer wall, and an asymmetrical anti-fool hole group (10). The position of the anti-fool hole group (10) corresponds to the welding point of the positioning groove (3). The terminal welding positioning fixture (5) is composed of multiple layers of positioning plates. Each layer is provided with a through hole (11) and a through hole (7) that cooperate with the positioning post (6). The axis of the through hole (7) coincides with the anti-fool hole group (10).

2. The terminal welding fixture anti-foolproof jig according to claim 1, characterized in that: The cross-section of the anti-fool hole group (10) is an asymmetrical polygon.

3. The terminal welding fixture error-proof jig according to claim 1, characterized in that: The locking buckle (8) includes a pivot pin (12) fixed on the copper substrate positioning plate (1), and a locking plate (13) is rotatably connected to the outer wall of the pivot pin (12).

4. The terminal welding fixture anti-foolproof jig according to claim 1, characterized in that: The terminal welding positioning fixture (5) includes three independent positioning plates, the diameter of which decreases from top to bottom to form a stepped guide channel.

5. The terminal welding fixture error-proof jig according to claim 1, characterized in that: The number of positioning posts (6) is six, symmetrically distributed at the four corners and the middle of the long side of the copper substrate positioning plate (1).

6. The terminal welding fixture anti-foolproof jig according to claim 1, characterized in that: The positioning post (6) penetrates the terminal anti-fool plate (4) and the terminal welding positioning fixture (5) to form a vertical positioning reference.

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