Laser welding clamp

Abstract

The utility model relates to the technical field of metal clamps, in particular to a laser welding clamp which comprises a first clamping block and a second clamping block which are fixedly connected, the first clamping block is provided with a first clamping groove used for clamping a reciprocating rod body, and the second clamping block is provided with a second clamping groove used for clamping a round rod. The center line of the first clamping groove and the center line of the second clamping groove are collinear. The device has the advantages that the problem that deviation is prone to occurring in the concentricity of the extending part and the round rod is solved, and the product welding qualification rate is increased.

Description

Technical Field

[0001] This application relates to the technical field of metal fixtures, and particularly to a laser welding fixture. Background Art

[0002] A reciprocating rod includes a body and a round rod. The body has an integrally connected annular portion and a strip-shaped extending portion. For the laser welding process of the reciprocating rod, one end of the extending portion of the reciprocating rod away from the annular body needs to be inserted into the opening of the cylindrical round rod and the two need to be coaxial, and then laser welding is performed on the connection. The concentricity between the extending portion of the body and the round rod has a relatively high requirement, and the concentricity difference is within 0.2 for the product welding to be qualified.

[0003] In the related art, two sets of fixtures are installed at the welding station of the laser welding device. The body and the round rod of the reciprocating rod are respectively placed on the two sets of fixtures, and by aligning the two sets of fixtures, the extending portion of the body is aligned and inserted into the round rod.

[0004] In view of the above related art, the alignment of the two sets of fixtures is usually adjusted by bolts, but the rotation process of the bolts is unstable, which easily causes deviation in the concentricity between the extending portion and the round rod, thereby reducing the qualified rate of product welding, and there is still room for improvement. Utility Model Content

[0005] In order to improve the problem that the concentricity between the extending portion and the round rod is prone to deviation and improve the qualified rate of product welding, this application provides a laser welding fixture.

[0006] A laser welding fixture provided by this application adopts the following technical solutions:

[0007] A laser welding fixture includes a first clamping block and a second clamping block fixedly connected. The first clamping block is provided with a first clamping groove for clamping the body of the reciprocating rod, and the second clamping block is provided with a second clamping groove for clamping the round rod. The center line of the first clamping groove and the center line of the second clamping groove are collinearly arranged.

[0008] By adopting the above technical solutions, the center lines of the first clamping groove and the second clamping groove are collinearly arranged. When the operator respectively places the body of the reciprocating rod and the round rod into the clamping grooves, no alignment adjustment is required, and it can directly ensure that the body and the round rod of the reciprocating rod can be automatically aligned on the same axis when clamped, thereby improving the concentricity accuracy between the extending portion and the round rod. On the one hand, the operation process is simplified and the work efficiency is improved. On the other hand, the error caused by bolt adjustment is also avoided, and the qualified rate of welding is significantly improved.

[0009] Furthermore, the first clamping block has a placing portion for placing the annular portion and a supporting portion for supporting the extending portion. The supporting portion is integrally connected to the side of the placing portion close to the second clamping block;

[0010] On both sides of the supporting part, a first limiting plate and a second limiting plate are symmetrically arranged. Between the two opposite side surfaces of the second limiting plate and the top surface of the supporting part, the first clamping groove is jointly formed.

[0011] By adopting the above technical solution, the integral connection between the supporting part and the placing part enhances the overall rigidity of the fixture and improves the clamping stability. The first limiting plate and the second limiting plate are symmetrically arranged on both sides of the supporting part and jointly form the first clamping groove with the top surface of the supporting part. The supporting part holds the extending part of the reciprocating rod. The first limiting plate and the second limiting plate precisely define the position of the extending part in the fixture, prevent the lateral movement of the reciprocating rod body during the welding process, improve the concentricity, and thus improve the accuracy and consistency of welding.

[0012] Furthermore, a positioning bolt is inserted through the supporting part. A locking nut is arranged at one end of the positioning bolt far from the head. The positioning bolt passes through the first limiting plate, the supporting part and the second limiting plate and is in threaded connection with the locking nut. The first limiting plate and the second limiting plate are slidably connected with the positioning bolt.

[0013] By adopting the above technical solution, the slidable connection of the first limiting plate and the second limiting plate on the positioning bolt enables the two limiting plates to perform radial fine adjustment on the extending part of the reciprocating rod in the horizontal direction, ensuring the precise position of the extending part of the reciprocating rod in the fixture and optimizing the alignment accuracy before welding. The combined use of the positioning bolt and the locking nut can lock the position of the extending part after fine adjustment, prevent its movement during the welding process, ensure that its concentricity with the round rod reaches the best state, improve the clamping accuracy, and further improve the qualified rate of welding.

[0014] Furthermore, a first elastic member and a second elastic member are sleeved on the positioning bolt and arranged at intervals. The first elastic member abuts between the head of the positioning bolt and the first limiting plate. The second elastic member abuts between the second limiting plate and the locking nut.

[0015] By adopting the above technical solution, the elastic member has a certain elastic deformation ability, so that the positioning bolt can adaptively adjust its position during the fine-tuning process to ensure that the extension part and the round rod maintain the best concentricity. Even if the workpiece is slightly displaced due to temperature changes or stress release during welding, the elastic member can compensate for the displacement through its own deformation to maintain the stability and accuracy of the clamping. At the same time, the first elastic member and the second elastic member are respectively pressed between the head of the positioning bolt and the first limit plate, and between the second limit plate and the locking nut, which can also play a role in buffering and shock absorption. During the welding process, due to the effects of thermal stress and mechanical stress, the reciprocating rod and the round rod may produce slight vibrations or deformations. The elastic member can absorb these vibrations and shocks, improve the stability and quality of welding, and also help protect the fixture and workpiece from damage.

[0016] Furthermore, the number of the positioning bolts is at least two and they are arranged at intervals on the supporting portion.

[0017] By adopting the above technical solution, since the first limit plate and the second limit plate are both slidably connected to the positioning bolt, compared with setting a single positioning bolt, the arrangement of multiple positioning bolts can prevent the first limit plate and the second limit plate from rotating around the positioning bolt, and can more effectively fix and support the first limit plate and the second limit plate, thereby enhancing the stability of the entire clamp. During the welding process, it can reduce the loosening of the clamp or the displacement of the workpiece caused by vibration or impact, ensuring the smooth progress of the welding process.

[0018] Furthermore, the second clamping block is provided with a step for laser welding operation on a side close to the first clamping block.

[0019] By adopting the above technical solution, during the welding process, the laser welding equipment needs sufficient working space to ensure that the welding beam can accurately irradiate the welding joint and avoid interference with the fixture or other components. The step provides a more spacious and flexible space for laser welding operations, allowing welding equipment to more easily approach the welding area, thereby improving the efficiency and accuracy of the welding operation.

[0020] Furthermore, guiding inclined surfaces for guiding the extension part to be inserted are provided on two opposite side surfaces of the first limiting plate and the second limiting plate.

[0021] By adopting the above technical solution and setting the guiding inclined surface, when the extension part is placed in the fixture, the operator only needs to push the extension part along the inclined surface, so that the extension part can be automatically aligned and smoothly clamped into the first clamping groove. Hard collision between the extension part and the limit plate is prevented, and wear or damage is avoided, thereby protecting the integrity of the workpiece and ensuring the welding quality.

[0022] Further, a limiting convex step for limiting the annular part is provided along the length direction on the side of the placing part away from the supporting part.

[0023] By adopting the above technical solution, the limiting convex step limits the annular part, which is equivalent to providing a stable support point for the annular part to prevent it from moving or rotating during the welding process, thereby further restricting the position of the reciprocating rod in the fixture, helping to ensure the accuracy of the welding position and posture, and thus improving the welding quality.

[0024] Further, a relief groove is formed at the middle position on the side of the limiting convex step close to the supporting part.

[0025] By adopting the above technical solution, when the welding operation is completed, since the annular part abuts against the limiting convex step and is thus limited by the limiting convex step, the setting of the relief groove enables a certain gap to be left between the annular part and the limiting convex step, facilitating the application of force from the position of the relief groove to take out the welded reciprocating rod.

[0026] Further, on the sides of the first clamping block and the second clamping block away from the first clamping groove and the second clamping groove, pre-opening holes for connecting with the laser welding device are provided.

[0027] By adopting the above technical solution, the pre-opening holes enable the fixture to be accurately connected to the laser welding device, simplifying the installation process. Through the pre-opening holes, it helps to accurately align the fixture with the laser welding device, ensuring that the position of the fixture on the laser welding device is accurate and error-free, providing a reliable basis for subsequent welding operations, and thus improving the accuracy and stability of welding.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. By arranging the center lines of the first clamping groove and the second clamping groove to be collinear, automatic alignment of the reciprocating rod body and the round rod during clamping is achieved, eliminating the need for manual alignment adjustment, improving the concentricity accuracy of the extension part and the round rod, simplifying the operation process, avoiding errors that may be caused by manual adjustment, and enhancing the qualification rate of welding;

[0030] 2. The first limiting plate and the second limiting plate are slidably connected and locked through positioning bolts and locking nuts to achieve radial fine adjustment and position locking of the extension part of the reciprocating rod, optimizing the alignment accuracy before welding and maintaining the best concentricity state between the extension part and the round rod during the welding process, further improving the accuracy and consistency of welding;

[0031] 3. The elastic member enables the positioning bolt to adaptively adjust its position during the fine-tuning process and compensate for the small displacements caused by temperature changes or stress release during the welding process, thereby maintaining the stability and accuracy of clamping. The elastic member also plays a role in buffering and shock absorption, protecting the fixture and the workpiece from damage and improving the welding quality. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the overall structure of a laser welding fixture for clamping a reciprocating rod according to an embodiment of the present application.

[0033] Figure 2 It is an exploded view of the structure of a laser welding fixture and a reciprocating rod according to an embodiment of the present application.

[0034] Figure 3 It is an exploded view of the structure of a laser welding fixture according to an embodiment of the present application Figure 1 .

[0035] Figure 4 It is an exploded view of the structure of a laser welding fixture according to an embodiment of the present application Figure 2 .

[0036] Description of the reference numerals: 0, reciprocating rod; 01, body; 011, annular part; 012, extension part; 02, round rod; 1, first clamping block; 11, first clamping groove; 12, placement part; 121, limiting convex step; 1211, relief groove; 13, supporting part; 14, pre-opened hole; 2, second clamping block; 21, second clamping groove; 22, relief step; 3, first limiting plate; 31, guiding inclined surface; 4, second limiting plate; 5, positioning bolt; 51, locking nut; 52, first elastic member; 53, second elastic member. Detailed Description of the Embodiment

[0037] In order to make the purpose, technical solution and advantages of the present application clearer, the following further elaborates on the present application in conjunction with the attached Figures 1-4 drawings and embodiments.

[0038] An embodiment of the present application discloses a laser welding fixture. Referring to Figure 1 and Figure 2 , the laser welding fixture includes a first clamping block 1 and a second clamping block 2 that are integrally connected. The first clamping block has a placement part 12 for placing the annular part 011 and a supporting part 13 for supporting the extension part 012. The supporting part 13 is integrally connected to the side of the placement part 12 close to the second clamping block 2. The width of the supporting part 13 is smaller than the width of the placement part 12 to match the extension part 012.

[0039] The first limiting plate 3 and the second limiting plate 4 are respectively provided on both sides of the supporting part. The first limiting plate 3 and the second limiting plate 4 are symmetrically arranged and are mutually abutted with the supporting part 13. The first limiting plate 3 and the second limiting plate 4 are located between the two opposite sides and the top surface of the supporting part 13 to form a first clamping groove 11 for clamping the extension part 012. Figure 3 The first limiting plate 3 and the second limiting plate 4 are symmetrically provided with guiding inclined surfaces 31 on opposite side surfaces for facilitating the insertion of the extending portion 012 .

[0040] Reference Figure 3 and Figure 4 A second clamping groove 21 for clamping the round rod 02 is opened on the second clamping block 2 along the length direction. The center line of the second clamping groove 21 is colinear with the center line of the first clamping groove 11. When the extension portion 012 of the reciprocating rod 0 is inserted into the first clamping groove 11 and the round rod 02 is inserted into the second clamping groove 21, the center axis of the extension portion 012 and the center axis of the round rod 02 can be aligned with each other.

[0041] Positioning bolts 5 are vertically penetrated on the supporting portion 13 along the width direction. The number of the positioning bolts 5 can be several. In this embodiment, the number of the positioning bolts 5 is two, and the two positioning bolts 5 are spaced apart from top to bottom along the thickness direction of the supporting portion 13.

[0042] The positioning bolt 5 is threadedly connected with a locking nut 51 at one end away from the head. At least two elastic members are arranged at intervals on the positioning bolt 5. The number of elastic members in this embodiment is preferably two and the elastic member is a spring with a certain elastic deformation capacity. The two elastic members are defined as a first elastic member 52 and a second elastic member 53. When the positioning bolt 5 passes through the first limit plate 3, the supporting portion 13 and the second limit plate 4 in sequence, the positioning bolt 5 is slidably connected with the first limit plate 3 and the second limit plate 4. The first elastic member 52 is pressed tightly between the first limit plate 3 and the head of the positioning bolt 5, and the second elastic member 53 is pressed tightly between the second limit plate 4 and the locking nut 51.

[0043] The first clamping block 1 is provided with a limiting convex step 121 on the side of the placement portion 12 away from the supporting portion 13. When the annular portion 011 of the reciprocating rod 0 body 01 is placed on the placement portion 12, the side of the annular portion 011 away from the extension portion 012 abuts against the side wall of the limiting convex step 121. The limiting convex step 121 is used to abut against the side wall of the annular portion 011. A clearance groove 1211 is provided at the middle position. When the welding operation is completed, the operator can use an auxiliary tool to apply force at the clearance groove 1211 to facilitate the removal of the welded reciprocating rod 0 from the clamp.

[0044] On the side of the second clamping block 2 close to the first clamping block 1, there is a relief step 22 that cooperates with the welding device. The relief step 22 provides sufficient working space for the laser head and laser beam of the laser welding to ensure that the welding beam can accurately irradiate the part to be welded and avoid interference with the fixture or other components.

[0045] On the side of the first clamping block 1 and the second clamping block 2 away from the first clamping groove 11 and the second clamping groove 21, there are pre-drilled holes 14, through which the fixture can be quickly installed on the laser welding device.

[0046] The implementation principle of a laser welding fixture in an embodiment of the present application is as follows: The fixture is composed of a first clamping block 1 and a second clamping block 2 connected integrally to form a stable clamping foundation. The placement portion 12 of the first clamping block 1 is used to place the annular portion 011 of the reciprocating rod 0 body 01, and the supporting portion 13 is used to support the extending portion 012 of the reciprocating rod 0 body 01. The first limiting plate 3 and the second limiting plate 4 on both sides of the supporting portion 13 and the supporting portion 13 together form a first clamping groove 11 to accurately define the position of the extending portion 012. The second clamping groove 21 on the second clamping block 2 is used to clamp the round rod 02, and its center line is collinear with the center line of the first clamping groove 11 to ensure that the extending portion 012 and the round rod 02 can be automatically aligned on the same axis during clamping without manual alignment adjustment, improving the alignment accuracy of concentricity. The first limiting plate 3 and the second limiting plate 4 are slidably connected to the supporting portion 13 through positioning bolts 5 and achieve a fine-tuning function with the help of elastic members (such as springs). During the fine-tuning process, the self-adaptive adjustment ability of the elastic member ensures that the extending portion 012 and the round rod 02 maintain the best concentricity.

[0047] The above are all the preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A laser welding fixture, characterized in that: The invention comprises a first clamping block (1) and a second clamping block (2) which are fixedly connected, wherein the first clamping block (1) is provided with a first clamping groove (11) for clamping a reciprocating rod body, and the second clamping block (2) is provided with a second clamping groove (21) for clamping a round rod, and the center line of the first clamping groove (11) and the center line of the second clamping groove (21) are arranged colinearly.

2. The laser welding fixture according to claim 1, characterized in that: The first clamping block (1) comprises a placement portion (12) for placing the annular portion and a supporting portion (13) for supporting the extension portion, wherein the supporting portion (13) is integrally connected to a side of the placement portion (12) close to the second clamping block (2); A first limiting plate (3) and a second limiting plate (4) are symmetrically provided on both sides of the supporting portion (13); the first limiting plate (3) and the second limiting plate (4) jointly form the first clamping groove (11) between two opposite side surfaces of the first limiting plate (3) and the top surface of the supporting portion (13).

3. The laser welding fixture according to claim 2, characterized in that: A positioning bolt (5) is passed through the supporting portion (13), and a locking nut (51) is provided on the end of the positioning bolt (5) away from the head. The positioning bolt (5) passes through the first limiting plate (3), the supporting portion (13) and the second limiting plate (4) and is threadedly connected to the locking nut (51). The first limiting plate (3), the second limiting plate (4) and the positioning bolt (5) are slidably connected.

4. The laser welding fixture according to claim 3, characterized in that: A first elastic member (52) and a second elastic member (53) are sleeved on the positioning bolt (5) and spaced apart from each other. The first elastic member (52) is pressed tightly between the head of the positioning bolt (5) and the first limiting plate (3), and the second elastic member (53) is pressed tightly between the second limiting plate (4) and the locking nut (51).

5. The laser welding fixture according to claim 3, characterized in that: The number of the positioning bolts (5) is at least two and they are arranged at intervals on the supporting portion (13).

6. The laser welding fixture according to claim 1, characterized in that: The second clamping block (2) is provided with a clearance step (22) for laser welding operation on a side close to the first clamping block (1).

7. The laser welding fixture according to claim 2, characterized in that: Guiding inclined surfaces (31) for guiding the extension part to be inserted are provided on opposite side surfaces of the first limiting plate (3) and the second limiting plate (4).

8. The laser welding fixture according to claim 2, characterized in that: The placement portion (12) is provided with a limiting convex step (121) for limiting the position of the annular portion along the length direction on a side away from the supporting portion (13).

9. The laser welding fixture according to claim 8, characterized in that: The limiting convex step (121) is provided with a clearance groove (1211) at a middle position close to one side of the supporting portion (13).

10. The laser welding fixture according to claim 1, characterized in that: The first clamping block (1) and the second clamping block (2) are provided with a pre-opened hole (14) for connection with a laser welding device on a side away from the first clamping groove (11) and the second clamping groove (21).

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