Laser welding fixture for small-pitch multi-tooth injection molding body

Abstract

The utility model discloses a laser welding clamping fixture for small interval multi-tooth piece injection molding body, include: for placing first injection molding spare's frock female board, first injection molding spare is fixedly through setting up a plurality of quick clamping on frock female board, set up on frock female board for clamping first injection molding spare connecting tooth piece and second injection molding spare connecting tooth piece's tooth piece clamping mechanism. Through above -mentioned mode, the utility model has solved the prior art for this kind of small interval multi-tooth piece injection molding body between because clamping is not in position, adjacent tooth piece gap is big, leads to the problem such as blast hole, spatter, welding surface is not formed when laser welding, has improved product welding quality.

Description

Technical Field

[0001] This utility model relates to the field of laser welding clamping fixture technology, and in particular to a laser welding clamping fixture for injection-molded bodies with small pitch and multiple teeth. Background Technology

[0002] The battery control system of new energy electric vehicles needs to collect current and voltage signals, requiring connectors with high reliability. Laser welding is an efficient welding method for copper connectors, but it requires zero gap between parts; otherwise, defects such as pores and spatter are prone to occur. Taking a bridge signal acquisition device as an example, structurally, it involves welding two components, each an injection-molded part with multiple teeth to be welded. Before welding, it is required that the two sets of teeth be perpendicular to each other at 90 degrees. Before laser welding, the two sets of teeth need to be fitted tightly one by one to ensure zero gap. However, because each injection-molded part has tolerances (the maximum tooth pitch tolerance of a single part is 0.4mm) and is a rigid body, the corresponding teeth cannot be completely fitted after the two parts are positioned, resulting in large gaps (the largest gap after assembly is about 0.8mm). These gaps lead to welding defects such as pores, spatter, and incomplete formation, making it impossible to guarantee the quality of laser welding. Utility Model Content

[0003] The purpose of this invention is to provide a laser welding clamping fixture for injection molded bodies with small spacing and multiple teeth, which solves the problem that the gap between injection molded parts is difficult to achieve zero gap clamping, resulting in welding defects such as pores, spatter, and incomplete forming, which makes it impossible to guarantee the quality of laser welding.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A laser welding clamping fixture for small-pitch multi-tooth injection molded bodies includes: a tooling mother plate for placing a first injection molded part, wherein the first injection molded part is clamped and fixed by a plurality of quick clamps provided on the tooling mother plate;

[0006] A toothed clamping mechanism is installed on the tooling mother plate to clamp the connecting toothed plates of the first injection molded part and the connecting toothed plates of the second injection molded part.

[0007] Preferably, the tooling mother plate is provided with a positioning block one and a positioning block two near the toothed clamping mechanism, and the second injection molded part is vertically placed on the positioning block one.

[0008] Preferably, the quick clamp is fixed to the tooling mother plate by two screws, and a shim block is provided below the quick clamp.

[0009] Preferably, the toothed clamping mechanism includes several sets of clamps, with a second and a third shim provided below the clamps, and the clamps are fixed on the second and third shims by a rotating shaft; the opening and closing of the clamps are adjusted by a tightening screw at the end away from the clamp jaws.

[0010] Preferably, the tooling mother plate is also pre-set with positioning holes for fixing the first injection molded part.

[0011] It also includes upper focal length equalization columns and lower focal length equalization columns set on the upper and lower sides of the tooling mother plate to ensure that the laser focal length is consistent when the first injection molded part and the second injection molded part are welded on the front and back sides;

[0012] Both the upper focal length contour column and the lower focal length contour column are fixed to the tooling mother plate by screws.

[0013] Preferably, the distance from the end face of the upper focal length equal-height column to the front welding surface is equal to the distance from the end face of the lower focal length equal-height column to the back welding surface.

[0014] Preferably, a laser channel is provided on the tooling mother plate, and the laser channel is located between the positioning block and the toothed clamping mechanism.

[0015] The beneficial effects of this utility model are:

[0016] (1) This utility model discloses a laser welding clamping fixture for small-pitch multi-tooth injection molded bodies, including a tooth clamping mechanism set on the tooling mother plate for clamping the connecting tooth of the first injection molded part and the connecting tooth of the second injection molded part. Its structure is simple and easy to operate. Through the mechanical principle, the clamps achieve zero-gap fit and clamping between multiple teeth of the two injection molded parts, so as to facilitate subsequent laser welding. It solves the problem that in the prior art, due to improper clamping between such small-pitch multi-tooth injection molded bodies, the gap between adjacent teeth is large, resulting in defects such as pores, spatter, and incomplete weld surface formation during laser welding.

[0017] (2) The laser welding fixture of this utility model is also designed with upper and lower focal length equalization columns to ensure that the laser focal length is consistent when welding the front and back sides of the first injection molded part and the second injection molded part. The distance from the end face of the upper focal length equalization column to the front welding surface and the distance from the end face of the lower focal length equalization column to the back welding surface are equal. By setting the upper and lower focal length equalization columns, the focal length of the two welding surfaces of the injection molded part to be welded is kept consistent during laser double-sided welding. That is, after one side is welded, the fixture can be flipped and rotated on the equipment platform. There is no need to adjust the laser focal length. Welding of the other side can be carried out directly. The operation is simple and quick, greatly saving the program debugging time, ensuring the consistency of welding quality, and greatly improving production efficiency and welding quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a preferred embodiment of the laser welding clamping fixture for injection-molded small-pitch multi-tooth plates of this utility model;

[0019] Figure 2 This is a schematic diagram of the reverse structure of a laser welding clamping fixture for injection-molded small-pitch multi-tooth plates.

[0020] Figure 3 This is a schematic diagram of the application of the injection molded part on the laser welding clamping fixture described in this utility model in a preferred embodiment;

[0021] Figure 4 This is a schematic diagram of the toothed clamping mechanism in the laser welding fixture shown.

[0022] Figure 5 This is another schematic diagram of the laser welding fixture shown;

[0023] Figure 6 This is a schematic diagram of the front welding surface of an injection molded part using the laser welding clamping fixture described in this utility model in a preferred embodiment;

[0024] Figure 7 This is a schematic diagram of the reverse welding surface of an injection molded part using the laser welding clamping fixture described in this utility model in a preferred embodiment;

[0025] The components in the attached diagram are labeled as follows:

[0026] 1. Rotating shaft; 2. Tightening screw; 3. Clamp; 4. First injection molded part; 5. Second injection molded part; 6. Quick clamp; 7. Upper focal length equalization column; 8. Elevating block one; 9. Screw one; 10. Locating pin; 11. Tooling mother plate; 12. Laser channel; 13. Elevating block two; 14. Elevating block three; 15. Locating block one; 16. Front welding surface; 17. Lower focal length equalization column; 18. Back welding surface; 19. Screw two; 20. First injection molded part connecting toothed plate; 21. Second injection molded part connecting toothed plate. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0028] Example:

[0029] This embodiment describes the structure of a laser welding clamping fixture for injection-molded small-pitch multi-tooth plates.

[0030] Reference Figure 1-5As shown, a laser welding clamping fixture for small-pitch multi-tooth injection molded parts includes: a tooling mother plate 11 for placing a first injection molded part 4, the first injection molded part 4 being clamped and fixed by a plurality of quick clamps 6 disposed on the tooling mother plate 11; and a toothed clamping mechanism disposed on the tooling mother plate 11 for clamping the connecting toothed piece 20 of the first injection molded part and the connecting toothed piece 21 of the second injection molded part. This utility model has a simple overall structure and achieves zero-gap clamping of small-pitch multi-toothed parts integrally injection molded through the toothed clamping mechanism, thereby improving the quality of laser welding.

[0031] The tooling mother plate 11 has pre-set positioning holes for fixing the first injection molded part 4. The first injection molded part is fixed by fixing pins 10 through the positioning holes, so that it can be placed more stably on the tooling mother plate. The quick clamp 6 is fixed to the tooling mother plate 11 by screws 19, and a shim block 15 is provided below the quick clamp 6.

[0032] In a preferred embodiment, after the first injection molded part is fixed on the tooling mother plate, in order to ensure that the second injection molded part can fit tightly with the first injection molded part and improve the zero-gap clamping force between the connecting teeth of the injection molded parts, this utility model provides a positioning block 15 and a positioning block 2 near the tooth clamping mechanism on the tooling mother plate 11. The second injection molded part 5 is vertically placed on the positioning block 15. The positioning block 1 can limit the position of the second injection molded part, and at the same time, the function of the positioning block 1 is to make the height of the second injection molded part after placement consistent with that of the first injection molded part. The positioning block 2 has a vertical guiding and limiting function for the placement of the second injection molded part. The second injection molded part is placed vertically on the positioning block 1 along the positioning block 2, which means that the second injection molded part is perfectly fitted with the first injection molded part.

[0033] In this invention, the toothed clamping mechanism is the key to achieving zero-distance contact welding between injection-molded bodies with small-pitch multi-toothed plates.

[0034] Reference Figure 1 , 3 As shown in Figure 4, Figure 1 This is a schematic diagram of a preferred embodiment of the laser welding clamping fixture for injection-molded small-pitch multi-tooth plates of this utility model. Figure 3 This is a schematic diagram illustrating the application of the injection-molded part in the laser welding clamping fixture described in this utility model, according to a preferred embodiment. Figure 4 This is a schematic diagram of the toothed plate clamping mechanism in the laser welding fixture shown.

[0035] The toothed plate clamping mechanism includes several sets of clamps 3. A second shim 13 and a third shim 14 are provided below each clamp 3, and the clamps 3 are fixed to the second shim 13 and the third shim 14 via a rotating shaft 1. The opening and closing of the clamps is adjusted at the end furthest from the jaws of the clamps 3 by a tightening screw 2. In this mechanism, the rotating shaft not only serves to fix the clamps but also acts as a fulcrum for clamping force when the clamps clamp the product toothed plates.

[0036] The working principle of the toothed clamping mechanism: Considering the pivot point as the fulcrum, the clamp is divided into a short lever arm near the jaws and a long lever arm near the tail. The toothed plates to be welded on the first and second injection molded parts (i.e., the connecting toothed plates 20 and 21 of the first and second injection molded parts in the attached diagram) are inserted into the jaws. To increase the clamping force, the tail is opened by reverse-tightening the tightening screw 2. Under the action of the lever arm and the fulcrum, the jaws tighten, thus clamping and fitting the toothed plates of the parts to be welded together, achieving a zero-gap effect. Through the ingenious design of the toothed clamping mechanism, this invention enables rapid clamping of multi-toothed injection molded parts in small-spaced environments, with a firm clamping force, and meets the requirement of zero-gap clamping during laser welding.

[0037] Furthermore, this invention not only solves the problem of zero-gap clamping between injection-molded multi-tooth plates with small spacing, but also features a special design to improve the welding efficiency of multi-tooth plates on injection-molded parts. (Refer to...) Figure 1 , 2 As shown in 6 and 7, Figure 1 This is a schematic diagram of a preferred embodiment of the laser welding clamping fixture for injection-molded small-pitch multi-tooth plates of this utility model. Figure 2 This is a schematic diagram of the reverse side structure of the laser welding clamping fixture used for injection molding of small-pitch multi-tooth plates. Figure 6 This is a schematic diagram of the front welding surface of an injection molded part using the laser welding clamping fixture described in this utility model in a preferred embodiment. Figure 7 This is a schematic diagram of the reverse welding surface of an injection molded part using the laser welding clamping fixture described in this utility model in a preferred embodiment.

[0038] In a preferred embodiment, the laser welding fixture further includes an upper focal length equalization column 7 and a lower focal length equalization column 17 disposed on the upper and lower sides of the fixture mother plate 11 to ensure that the laser focal length is consistent when the first injection molded part 4 and the second injection molded part 5 are welded on their front and back sides. Both the upper focal length equalization column 7 and the lower focal length equalization column 17 are fixed to the fixture mother plate 11 by screws 9. The distance from the end face of the upper focal length equalization column 7 to the front welding surface 16 is equal to the distance from the end face of the lower focal length equalization column 17 to the back welding surface 18.

[0039] By setting upper and lower focal length equal-height columns, the focal length of the two welding surfaces of the product to be welded remains consistent during double-sided laser welding. That is, after one side is welded, the fixture is simply flipped and placed on the equipment platform; the laser focal length does not change due to the fixture flipping, allowing direct welding of the other side. This simple and quick operation significantly reduces program debugging time, thereby improving welding quality, stability, and product yield, ensuring consistent welding quality, and greatly increasing production efficiency. Of course, the flipping of this laser welding fixture can be done manually or automatically. The flipping method is a technical solution clearly understood and applicable by those skilled in the art, and therefore will not be elaborated upon in this invention.

[0040] To improve production efficiency, enhance the speed of laser welding operations, and facilitate double-sided welding with the flip-up laser welding fixture of this invention, a laser channel 12 is provided on the fixture mother plate 11. The laser channel 12 is located between the positioning block 15 and the toothed clamping mechanism. This design, combined with the upper and lower focal length equalization columns, allows the fixture to be flipped after welding the front side of the product. When focal length is inconvenient, the laser channel can be used to weld the reverse side of the product.

[0041] Combined with the appendix of this utility model Figure 1-7 Here is a brief explanation of the installation and use of this laser welding clamping fixture:

[0042] 1. Place the first injection molded part 4 flat on the tooling mother plate 11 and position it using the locating pin 10;

[0043] 2. Secure the first injection molded part 4 after positioning using the quick clamp 6;

[0044] 3. Place the second injection molded part 5 vertically on the positioning block 15 on the tooling mother plate 11, and at the same time, press it against the positioning block 2.

[0045] 4. Adjust the toothed clamping mechanism, insert the first injection molded part connecting toothed piece 20 and the second injection molded part connecting toothed piece 21 into the jaws, and rotate the tightening screw 2 to make the clamping 3 complete the zero-gap clamping of the toothed parts of the two injection molded parts to be welded.

[0046] 5. Welding the front welding surface 16, which is the side end weld of the toothed plate where the first injection molded part connecting toothed plate 20 and the second injection molded part connecting toothed plate 21 fit together.

[0047] 6. Flip the fixture and weld the corresponding toothed side end face weld on the reverse side;

[0048] 7. Once completed, release the quick clamps, remove the injection-molded part, and complete the welding.

[0049] By using the laser welding clamping fixture for low-focal-length multi-tooth injection molded bodies described in this utility model, the clamping difficulty of zero-gap laser welding of multi-connecting toothed plates in small-pitch cases of one-piece injection molding is effectively solved, ensuring a 100% clamping qualification rate; it realizes rapid clamping of multi-connecting toothed plates in one-piece injection molding, and ensures that when the fixture is flipped on the equipment platform and welded on both sides, the weld seams on both sides of the product have the same focal length in the Z-axis direction, eliminating the need for two focusing adjustments, and improving production efficiency by more than 30%.

[0050] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A laser welding clamping fixture for injection-molded bodies with small pitch and multiple teeth, characterized in that, include: A tooling mother plate (11) for placing the first injection molded part (4), the first injection molded part (4) is pressed and fixed by a number of quick clamps (6) provided on the tooling mother plate (11); A toothed clamping mechanism is provided on the tooling mother plate (11) for clamping the first injection molded part connecting toothed plate (20) and the second injection molded part connecting toothed plate (21).

2. The laser welding clamping fixture for injection-molded small-pitch multi-tooth plates according to claim 1, characterized in that: The tooling mother plate (11) is provided with a positioning block one (15) and a positioning block two near the toothed clamping mechanism, and the second injection molded part is placed vertically on the positioning block one (15).

3. The laser welding clamping fixture for injection-molded small-pitch multi-tooth plates according to claim 1, characterized in that: The quick clamp (6) is fixed to the tooling mother plate (11) by screw two (19), and a shim block one (8) is provided below the quick clamp (6).

4. The laser welding clamping fixture for injection-molded small-pitch multi-tooth plates according to claim 1, characterized in that: The toothed clamping mechanism includes several sets of clamps (3). The clamps (3) are provided with a second (13) and a third (14) under them. The clamps (3) are fixed on the second (13) and the third (14) by a rotating shaft (1). The opening and closing of the clamps are adjusted by a tightening screw (2) at the end away from the jaws of the clamps (3).

5. The laser welding clamping fixture for injection-molded small-pitch multi-tooth plates according to claim 1, characterized in that: The tooling mother plate (11) is also pre-set with positioning holes for fixing the first injection molded part (4).

6. The laser welding clamping fixture for injection-molded small-pitch multi-tooth plates according to claim 1, characterized in that: It also includes an upper focal length equal height column (7) and a lower focal length equal height column (17) set on the upper and lower sides of the tooling mother plate (11) to ensure that the laser focal length is consistent when the first injection molded part (4) and the second injection molded part (5) are welded on the front and back sides. The upper focal length contour column (7) and the lower focal length contour column (17) are both fixed to the tooling mother plate (11) by screws (9).

7. The laser welding clamping fixture for injection-molded small-pitch multi-tooth plates according to claim 6, characterized in that: The distance from the end face of the upper focal length equalization column (7) to the front welding surface (16) is equal to the distance from the end face of the lower focal length equalization column (17) to the back welding surface (18).

8. The laser welding clamping fixture for injection-molded small-pitch multi-tooth plates according to claim 2, characterized in that: A laser channel (12) is provided on the tooling mother plate (11), and the laser channel (12) is located between the positioning block (15) and the toothed clamping mechanism.

Images