Laser welding jig

Abstract

The utility model discloses a laser welding jig which comprises a main body plate, a linear guide rail and a material pressing block. The linear guide rail is installed on the main body plate through fixing screws. The material pressing block is tightly pressed at the position of a product to be welded, the material pressing block and a cylindrical pin are fixedly installed in a glue bonding mode, and the cylindrical pin penetrates through the linear guide rail and is connected with the main body plate through the cylindrical pin. The cylindrical pin penetrates through the linear guide rail to restrain the position of the material pressing block. And an elastic piece is arranged on the material pressing block. By utilizing the linear movement characteristic of the guide rail and the matching use of the elastic piece and the like, in the use process of the jig, the material pressing block can fully utilize the elastic piece to tightly press products to be welded, so that the full contact between the parts to be welded and the full fitting of materials in the welding process are ensured, the welding quality can be greatly improved, and the qualified rate of the products is improved; and meanwhile, the situation of uneven stress cannot be caused, and the quality of a welded product is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of welding jigs, in particular to a laser welding jig. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. When welding is required, the welded parts generally need to be fixed to facilitate welding operations on the welded parts. In laser welding jigs, the traditional jig structures are mostly the same. They all use two plates to clamp the product in the middle and perform laser welding in the holes in the reserved positions. However, due to changes in product structure, the various welding positions are not necessarily at the same level. Using two plates cannot clamp all welding positions at one time, resulting in difficulty in clamping. Too tight locking of the upper and lower plates will damage the product and cause it to be scrapped. Based on the structure of the old plate, profiling leads to excessively high processing costs and is not applicable. Moreover, processing will make it difficult to control the size of the plate. That is, when the welding requirements change, the product feature requirements become more, and the original process cannot meet the production requirements, so it is impossible to ensure accurate coverage on the welding area, and it is also impossible to ensure that the surface is closely fitted to the product surface, resulting in the product welding quality not being guaranteed. At the same time, since most of the welds are high-purity metals with soft and easy-to-scratch surfaces, it is also crucial to ensure that the product is clamped without being damaged.

[0003] After searching, it is found that Chinese patent CN217889903U discloses a laser welding jig, which solves the technical problems of poor welding, loose welding and deformation of welded parts due to insufficient contact between large welded parts and the pressure plate during welding. The Chinese patent includes a jig main plate and a compression spring plate, which are detachable and matched. The jig main plate is provided with an extrusion assembly for extruding the welding part of the welded parts, and an elastic member is provided between the jig main plate and the compression spring plate, which applies force to the extrusion assembly; the technical effect is that it can fully fit and extrude the welding part of the welded parts during welding, thereby avoiding deformation of the welded parts during welding and poor and loose welding. Although the patent has achieved good technical effects, it cannot take into account the problem of not crushing the product while pressing the welded parts to be welded.

[0004] Therefore, in order to meet production needs, it is very urgent to develop efficient and feasible jigs for production. Utility Model Content

[0005] The technical problem solved by the utility model is to design a laser welding fixture which can meet the requirements of pressing different welding positions on a welded part and avoid damaging the product due to uneven force.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: a laser welding fixture, including: a main plate, a linear guide rail, a pressing block,

[0007] The linear guide rail is mounted on the main body plate by fixing screws;

[0008] The pressing block is tightly pressed at the position of the product to be welded, and the pressing block is fixedly installed with a cylindrical pin by gluing, and the cylindrical pin passes through the linear guide rail and is connected to the main plate through the cylindrical pin;

[0009] The cylindrical pin passes through the linear guide rail to constrain the position of the pressing block;

[0010] An elastic piece is arranged on the pressing block.

[0011] Preferably, a plurality of main body panels are provided.

[0012] Preferably, a countersunk hole is provided on the pressing block, and the elastic member is installed in the countersunk hole.

[0013] Preferably, the elastic member is a spring.

[0014] Preferably, the pressing block is provided with a funnel-shaped through hole for the laser beam to pass through;

[0015] Correspondingly, the main body plate is provided with a through hole corresponding to the funnel-shaped through hole.

[0016] Preferably, a pressing block limiting screw is provided through the main plate to the pressing block to ensure that the pressing block will not be ejected out of the working range by the elastic member.

[0017] Preferably, the pressing block is installed on the main plate to be 0.8 mm higher than the plate surface.

[0018] The beneficial effects of the utility model are:

[0019] (1) The utility model relates to a laser welding jig, which is guided by a linear guide rail and tightened with a spring on a pressure block to clamp and fix all welding points of different heights at one time. The linear movement characteristics of the guide rail are utilized, and in combination with an elastic member, during the use of the jig, the bottom of the pressure block can fully utilize the elastic member to press the product to be welded, so that the materials are fully fitted during the welding process, which greatly improves the welding quality and the qualified rate of the product; at the same time, it will not cause uneven force to damage the product, and the welding quality is more stable, thereby improving the qualified rate of the product.

[0020] (2) In a laser welding jig of the utility model, the path for the laser to reach the welded part is through the through holes on the main plate and the pressing block, wherein the through holes on the pressing block are designed to be funnel-shaped, so as to facilitate the flying out of welding slag and reduce the influence on welding quality. The slope of the funnel-shaped weld can effectively prevent the laser from being reflected on the product, causing the surface of the product to be burned. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a laser welding fixture of the utility model;

[0022] Figure 2 is a schematic diagram of the overall structure of a laser welding fixture from another angle;

[0023] Figure 3 It is a schematic diagram of a preferred display structure of a laser welding fixture;

[0024] Figure 4 1 is a schematic diagram of a partially enlarged structure of a laser welding jig;

[0025] Figure 5 1 is an exploded schematic diagram of a laser welding jig;

[0026] The markings of the components in the accompanying drawings are as follows:

[0027] 1. Fixing screw; 2. Linear guide; 3. Limit screw of pressure block; 4. Main plate; 5. Spring; 6. Cylindrical pin; 7. Pressure block. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with 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 protection scope of the present invention.

[0029] Example:

[0030] This embodiment introduces the structure of a laser welding fixture.

[0031] Combined with Figure 1 , 2 , 3, Figure 1 This is a schematic diagram of the overall structure of a laser welding fixture of the utility model. Figure 2 This is a schematic diagram of the overall structure of a laser welding fixture from another angle. Figure 3 It is a schematic diagram of a better display structure of a laser welding fixture.

[0032] A laser welding jig includes: a main body plate 4, a linear guide rail 2, and a pressure block 7. The linear guide rail 2 is installed on the main body plate 4 by means of a fixing screw 1; the pressure block 7 is pressed tightly at the position of the product to be welded, and the pressure block 4 is fixedly installed with a cylindrical pin 6 by means of glue bonding. The cylindrical pin 6 passes through the linear guide rail 2 and is connected to the main body plate 4 through the cylindrical pin 6. The cylindrical pin 6 passes through the linear guide rail 2 to constrain the position of the pressure block 7 and prevent the pressure block from deviating. An elastic member is provided on the pressure block 7.

[0033] like Figure 4 , 5 As shown, Figure 4 It is a partial enlarged structural schematic diagram of a laser welding fixture. Figure 5 1 is a schematic diagram of an exploded view of a laser welding jig. A countersunk hole is provided on the pressing block 7, and the elastic member is installed in the countersunk hole.

[0034] In this embodiment, the elastic member is a spring. And the elastic member is a linear spring with a wire diameter of 0.8 mm. In the present utility model, the selection of the elastic member is crucial. In order to ensure the stability of the compression, we determine the spring model based on the stress deformation of the product. This process needs to ensure that the product is not crushed (because the welded material is mostly metal with high purity and the surface is soft and easy to scratch), while the product can be compressed.

[0035] Furthermore, the press block 7 is provided with a funnel-shaped through hole for the laser beam to pass through; correspondingly, the main plate 4 is provided with a through hole corresponding to the funnel-shaped through hole. When in use, the laser beam passes through the through hole and the funnel-shaped through hole to reach the welding contact surface. In addition, in this embodiment, the inventor designs the through hole on the press block through which the laser passes into a funnel shape (large at the top and small at the bottom). The purpose of such a design is: (1) to facilitate the flying out of welding slag and reduce the impact on welding quality; (2) the slope of the funnel-shaped weld can effectively prevent the laser from being reflected on the product, resulting in the surface of the product being burned.

[0036] Furthermore, a pressing block limiting screw 3 is provided through the main plate 4 to the pressing block 7 to ensure that the pressing block 7 will not be ejected out of the working range by the elastic member.

[0037] In this embodiment, in order to ensure that the pressure block is in smooth contact with the processing surface of the product to be welded, it is necessary to ensure that it slowly descends in a relatively horizontal posture during the clamping (spring contraction) stroke and gradually approaches the laser position of the product to be welded. At this time, the role of the linear guide rail is to "guide" the pressure block 7 and limit the freedom of the pressure block 7 in the XY axis direction.

[0038] The structure of the linear guide rail can only make the cylindrical pin 6 matched with it move and rotate on the Z axis, while the two linear guide rails can constrain the rotational freedom on the Z axis. Theoretically, the straight line is determined by referring to two points. The linear guide rail constrains the freedom of the pressure block, so that the pressure block can only move up and down in the Z axis direction, thereby avoiding errors in the position of the pressure block pressing area, thereby greatly improving the accuracy of the welding position.

[0039] Furthermore, a number of linear guide rails are provided on the main body plate to adapt to production needs as a design guide.

[0040] For ease of understanding, in this embodiment, the designer briefly explains the use of the laser welding fixture:

[0041] (1) Prepare the main plate 4 and the pressure block 7, and drill holes and countersink the main plate 4 of the jig according to the structure of the pressure block 7 to install the fixing screws 1, the pressure block limit screws 3, the cylindrical pins 6, etc.;

[0042] (2) The pressure block 7 is installed together with the main plate 4 through the pressure block limit screw 3 and the cylindrical pin 6. After installation, the pressure block 7 should be 0.8 mm higher than the surface of the main plate 4; at the same time, the cylindrical pin 6 is used to constrain the position of the pressure block 7 to be stable, and the pressure block limit screw 3 is used to ensure that the pressure block will not be ejected from the working range by the spring;

[0043] (3) Select the spring model and install the spring 5 on the pressing block 7;

[0044] (4) Prepare the linear guide rail 2 and the cylindrical pin 6, and glue the cylindrical pin 6 to the pressing block 7;

[0045] (5) Pass the pin 6 through the linear guide rail 2, assemble all accessories together, and check whether all parts are movable;

[0046] (6) Pressing the pressing block 7 onto the product to be welded, that is, the pressing block contacts the welding surface of the part to be welded;

[0047] (7) The pressing block 7 uses the elasticity of the spring 5 to press and fit the welding points of the two products to be welded.

[0048] Through the introduction of the above embodiments, the utility model introduces the use of linear guide rails in the fixture, utilizes the linear movement characteristics of the guide rails, and cooperates with elastic parts. During the use of the fixture, the bottom of the pressing block can fully utilize the elastic parts to press the product, and the materials are fully fitted during the welding process, which greatly improves the welding quality and the qualified rate of the product; at the same time, it will not cause uneven force, making the welding product more stable.

[0049] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A laser welding jig, characterized in that: include: Main body plate (4), linear guide rail (2), pressing block (7), The linear guide rail (2) is mounted on the main body plate (4) via fixing screws (1); The pressing block (7) is pressed tightly against the position of the product to be welded, and the pressing block (7) is fixedly installed with the cylindrical pin (6) by gluing, and the cylindrical pin (6) passes through the linear guide rail (2) and is connected to the main plate (4) through the cylindrical pin (6); An elastic piece is arranged on the pressing block (7).

2. A laser welding jig according to claim 1, characterized in that: A plurality of linear guide rails (2) are provided.

3. A laser welding jig according to claim 1, characterized in that: A countersunk hole is provided on the pressing block (7), and the elastic member is installed in the countersunk hole.

4. A laser welding jig according to claim 1 or 3, characterized in that: The elastic member is a spring (5).

5. The laser welding jig according to claim 1, characterized in that: The pressing block (7) is provided with a funnel-shaped through hole for the laser beam to pass through; Correspondingly, a through hole corresponding to the funnel-shaped through hole is provided on the main body plate (4).

6. The laser welding jig according to claim 1, characterized in that: A pressing block limiting screw (3) is provided through the main plate (4) to the pressing block (7) to ensure that the pressing block (7) will not be ejected out of the working range by the elastic member.

7. The laser welding jig according to claim 1, characterized in that: After the pressing block (7) is installed on the main plate (4), it should be 0.8 mm higher than the plate surface of the main plate (4).

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