A positioning fixture for a spot welding machine

Abstract

This utility model discloses a positioning fixture for a spot welding machine, relating to the field of spot welding machine technology. It includes a base with at least three connecting grooves at its upper end, and two first mounting grooves at its upper end. A fixed seat and two clamping seats are mounted on the top of the base. A connecting block is fixedly mounted below the fixed seat, corresponding to the connecting grooves. A slider is slidably mounted inside the first mounting groove, and an electric telescopic cylinder is fixedly mounted inside the first mounting groove. Positioning blocks are mounted on opposite sides of the fixed seat and clamping seats. This positioning fixture, by incorporating slidable movable jaws and a driving device, can adjust the distance between the movable jaws and the fixed seat according to the workpiece size. The movable jaws are equipped with a pressure detection function, allowing for measurement of the clamping force on the workpiece during welding to prevent loosening and ensure welding quality.

Description

Technical Field

[0001] This utility model relates to the field of spot welding machine technology, specifically a positioning fixture for a spot welding machine. Background Technology

[0002] A spot welding machine is a commonly used welding equipment that uses the resistance heating effect to achieve metal connection. It generates high temperature at the contact point of the workpiece by passing an electric current, and the pressure applied by the electrodes causes the metal to melt locally and form a weld spot. When welding workpieces, positioning fixtures are needed to fix the workpieces to ensure the accuracy and stability of the welding.

[0003] Chinese Patent Publication No. CN216462412U, authorized on May 10, 2022, describes a spot welding machine's welding point positioning fixture. The fixture includes a support frame, a servo motor mounted on top of the support frame, a rotating shaft fixedly connected to the output end of the servo motor, an adjusting screw fixedly connected to the bottom of the rotating shaft, an adjusting sleeve threaded onto the top surface of the adjusting screw, a support rod fixedly connected to the right side of the adjusting sleeve, and a spot welding machine body fixedly connected to the right side of the support rod. This invention utilizes a clamping cylinder to push a sliding plate inwards, which slides within a guide groove. The movement of the sliding plate moves a moving plate, which in turn moves a moving block. The moving block slides within a transverse groove, and the movement of the moving block moves a clamping seat, achieving a superior clamping effect and solving the problem of poor clamping performance in existing spot welding machine welding point positioning fixtures.

[0004] Existing positioning fixtures can only fix workpieces of a specific size. When it is necessary to weld workpieces of different specifications, the fixture must be replaced. During the welding process, the workpiece is prone to loosening, which affects the welding quality and cannot meet the usage requirements. Utility Model Content

[0005] The purpose of this utility model is to provide a positioning fixture for a spot welding machine, so as to solve the problem mentioned in the background art that the existing positioning fixture can only fix workpieces of a specific size. When it is necessary to weld workpieces of different specifications, the fixture must be changed. The positioning fixture is prone to workpiece loosening during the welding process, which affects the welding quality and cannot meet the usage requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for a spot welding machine, comprising a base, wherein the upper end of the base is provided with connecting grooves, at least three of which are equidistantly arranged at the upper end of the base; the upper end of the base is provided with first mounting grooves, two of which are symmetrically inclined; a fixed seat and a clamping seat are mounted on the upper part of the base, two of which are clamping seats; a connecting block is fixedly mounted below the fixed seat, the connecting block being corresponding to the connecting groove and inserted into the base; a slider is slidably mounted inside the first mounting groove, and the slider is fixedly connected to the clamping seat; an electric telescopic cylinder is fixedly mounted inside the first mounting groove, and the telescopic end of the electric telescopic cylinder is connected to the slider; positioning blocks are mounted on opposite sides of the fixed seat and the clamping seat.

[0007] Preferably, a pressure sensor is installed inside the positioning block.

[0008] Preferably, a second mounting groove is provided on the side wall opposite to the fixed seat and the clamp, and a connecting strip is fixedly installed on one side of the positioning block. The connecting strip is correspondingly arranged with the second mounting groove and is slidably connected with the fixed seat and the clamp. The cross-section of the second mounting groove and the connecting strip is T-shaped.

[0009] Preferably, the connecting strip is provided with a threaded hole, and a connecting bolt is installed on the other side of the fixing seat and the clamp, and the connecting bolt is provided corresponding to the threaded hole, and the connecting bolt is threadedly connected to the positioning block.

[0010] Preferably, the inner wall of the first mounting groove is provided with two roller grooves, and the two roller grooves are provided on both sides of the slider. Ball bearings are rolled on both sides of the slider, and the ball bearings are corresponding to the roller grooves.

[0011] Preferably, the lower part of the connecting block has two limit holes on its side wall, and the two limit holes are located on both sides of the connecting block. The base has an installation cavity that communicates with the connecting groove. An insert block is slidably installed inside the installation cavity, and the insert block is corresponding to the limit hole. A compression spring is movably installed inside the installation cavity, and the two ends of the compression spring are fixedly connected to the base and the insert block, respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model device, through the arrangement of a fixed base, a first mounting groove, a clamping base, an electric telescopic cylinder, a positioning block, and a pressure sensor, uses the electric telescopic cylinder to apply a pushing and pulling force to the slider, driving the clamping base to move along the first mounting groove. The clamping base moves towards the fixed base and clamps the workpiece from three directions with the help of the positioning block. The positioning block is made of wear-resistant material to reduce the impact of positioning accuracy on the positioning accuracy due to wear of the positioning block. The pressure sensor measures the clamping force of the workpiece and judges the clamping effect of the workpiece based on the clamping pressure. It can also measure the clamping force of the fixed workpiece during the welding process to prevent the workpiece from loosening and ensure the welding quality.

[0014] 2. The utility model device, through the setting of a second mounting groove, a connecting strip and a connecting bolt, inserts the connecting strip into the second mounting groove, installs the positioning block with the fixed seat and the clamp, and limits the installation of the positioning block with the threaded hole to ensure the firmness of the installed positioning block. The positioning block is easy to install, and when it is necessary to weld workpieces of different specifications, it is convenient to replace the corresponding positioning block, thereby improving the applicability of the positioning fixture.

[0015] 3. This utility model device, through the setting of connecting groove, connecting block, limiting hole, compression spring and insert block, connects the fixed seat and the base by aligning the connecting block with the connecting groove and inserting it. After the connecting block is fully inserted into the connecting groove, the compression spring applies a pushing force to the insert block. Under the action of the pushing force, the insert block is pushed into the limiting hole to limit the inserted connecting block and ensure the firmness of the installed fixed seat. By inserting the connecting block into the connecting groove in different parts, the position of the installed fixed seat can be changed, which can meet the positioning requirements of workpieces of different sizes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a perspective view of the connection between the connecting block and the fixing base of this utility model;

[0018] Figure 3 This is a perspective view of the connection between the slider and the clamp of this utility model;

[0019] Figure 4 This is a diagram showing the connection relationship between the positioning block and the clamping seat of this utility model;

[0020] Figure 5 This is a diagram showing the connection relationship between the fixing seat and the base of this utility model.

[0021] In the diagram: 1. Base; 2. Fixing seat; 3. Connecting groove; 4. First mounting groove; 5. Clamp; 6. Electric telescopic cylinder; 7. Positioning block; 8. Second mounting groove; 9. Connecting block; 10. Limiting hole; 11. Slider; 12. Ball bearing; 13. Roller groove; 14. Compression spring; 15. Connecting strip; 16. Pressure sensor; 17. Threaded hole; 18. Connecting bolt; 19. Mounting cavity; 20. Insert block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-5 This utility model provides an embodiment of a positioning fixture for a spot welding machine, comprising a base 1, with at least three connecting grooves 3 equidistantly arranged at the upper end of the base 1, and two first mounting grooves 4 symmetrically and obliquely arranged at the upper end of the base 1. A fixing seat 2 and two clamping seats 5 are mounted above the base 1. A connecting block 9 is fixedly mounted below the fixing seat 2, corresponding to the connecting grooves 3 and inserted into the base 1. A slider 11 is slidably installed inside the mounting groove 4, and the slider 11 is fixedly connected to the clamp 5. An electric telescopic cylinder 6 is fixedly installed inside the first mounting groove 4, and the telescopic end of the electric telescopic cylinder 6 is connected to the slider 11. A positioning block 7 is installed on the opposite side of the fixed seat 2 and the clamp 5. A pressure sensor 16 is installed inside the positioning block 7. A roller groove 13 is provided on the inner wall of the first mounting groove 4. There are two roller grooves 13, and the two roller grooves 13 are located on both sides of the slider 11. Ball bearings 12 are rolled on the side walls on both sides of the slider 11, and the ball bearings 12 are correspondingly arranged with the roller grooves 13.

[0024] In use: Select the appropriate positioning block 7 according to the size and shape of the workpiece to be welded and install it on the fixed seat 2 and the clamping seat 5. Place the workpiece to be welded between the fixed seat 2 and the clamping seat 5, drive the electric telescopic cylinder 6 to apply a pushing and pulling force to the slider 11, and drive the clamping seat 5 to move along the first mounting groove 4. The clamping seat 5 moves towards the fixed seat 2 and is clamped from three directions with the help of the positioning block 7. The pressure sensor 16 measures the clamping force of the workpiece and judges the clamping effect of the workpiece according to the clamping pressure. It can also measure the clamping force of the fixed workpiece during the welding process to prevent the workpiece from loosening and ensure the welding quality.

[0025] Please see Figure 2 , Figure 3 and Figure 4The fixed base 2 and the clamp 5 are provided with a second mounting groove 8 on their opposite side walls. A connecting strip 15 is fixedly installed on one side of the positioning block 7. The connecting strip 15 is correspondingly set with the second mounting groove 8 and is slidably connected with the fixed base 2 and the clamp 5. The cross-section of the second mounting groove 8 and the connecting strip 15 is T-shaped. The connecting strip 15 is provided with a threaded hole 17. A connecting bolt 18 is installed on the other side of the fixed base 2 and the clamp 5 and is correspondingly set with the threaded hole 17. The connecting bolt 18 is threadedly connected to the positioning block 7. The connecting strip 15 is inserted into the second mounting groove 8 to install the positioning block 7 with the fixed base 2 and the clamp 5. The connecting bolt 18 cooperates with the threaded hole 17 to limit the installation of the positioning block 7, ensuring the firmness of the installed positioning block 7. The positioning block 7 is easy to install. When it is necessary to weld workpieces of different specifications, it is convenient to replace the corresponding positioning block 7, thereby improving the applicability of the positioning fixture.

[0026] Please see Figure 1 , Figure 2 and Figure 5 The lower part of the connecting block 9 has two limit holes 10 on its side wall, and the two limit holes 10 are located on both sides of the connecting block 9. The base 1 has an installation cavity 19, which is connected to the connecting groove 3. An insert block 20 is slidably installed inside the installation cavity 19, and the insert block 20 is corresponding to the limit hole 10. A compression spring 14 is movably installed inside the installation cavity 19, and the two ends of the compression spring 14 are fixedly connected to the base 1 and the insert block 20, respectively. The connecting block 9 is inserted into the connecting groove 3 to connect the fixing seat 2 to the base 1. By inserting the connecting block 9 into the connecting groove 3 at different locations, the position of the fixed seat 2 can be changed to meet the positioning requirements of workpieces of different sizes. After the connecting block 9 is fully inserted into the connecting groove 3, the compression spring 14 applies a pushing force to the insert block 20. Under the action of the pushing force, the insert block 20 is pushed into the limit hole 10, which limits the insertion of the connecting block 9 and ensures the firmness of the fixed seat 2.

[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for a spot welding machine, comprising a base (1), characterized in that: The upper end of the base (1) is provided with a connecting groove (3), and there are at least three connecting grooves (3), which are equidistant from each other at the upper end of the base (1). The upper end of the base (1) is provided with a first mounting groove (4), and there are two first mounting grooves (4), which are symmetrically inclined. A fixed seat (2) and a clamp (5) are installed on the upper part of the base (1), and there are two clamps (5). A connecting block (9) is fixedly installed below the fixed seat (2), and the connecting block (9) is corresponding to the connecting groove (3) and is inserted into the base (1). A slider (11) is slidably installed inside the first mounting groove (4), and the slider (11) is fixedly connected to the clamp (5). An electric telescopic cylinder (6) is fixedly installed inside the first mounting groove (4), and the telescopic end of the electric telescopic cylinder (6) is connected to the slider (11). A positioning block (7) is installed on the opposite side of the fixed seat (2) and the clamp (5).

2. The positioning fixture for a spot welding machine according to claim 1, characterized in that: A pressure sensor (16) is installed inside the positioning block (7).

3. The positioning fixture for a spot welding machine according to claim 1, characterized in that: A second mounting groove (8) is provided on the opposite side wall of the fixed seat (2) and the clamp (5). A connecting strip (15) is fixedly installed on one side of the positioning block (7). The connecting strip (15) is correspondingly provided with the second mounting groove (8), and the connecting strip (15) is slidably connected with the fixed seat (2) and the clamp (5). The cross-sections of the second mounting groove (8) and the connecting strip (15) are both T-shaped.

4. The positioning fixture for a spot welding machine according to claim 3, characterized in that: The connecting strip (15) is provided with a threaded hole (17), and a connecting bolt (18) is installed on the other side of the fixing seat (2) and the clamp (5), and the connecting bolt (18) is provided in correspondence with the threaded hole (17). The connecting bolt (18) is threadedly connected to the positioning block (7).

5. The positioning fixture for a spot welding machine according to claim 1, characterized in that: The inner wall of the first mounting groove (4) is provided with a roller groove (13). There are two roller grooves (13), and the two roller grooves (13) are located on both sides of the slider (11). Roller balls (12) are rolled on both sides of the slider (11), and the roller balls (12) are correspondingly arranged with the roller grooves (13).

6. The positioning fixture for a spot welding machine according to claim 1, characterized in that: The lower part of the connecting block (9) is provided with a limiting hole (10) on its side wall. There are two limiting holes (10), and the two limiting holes (10) are located on both sides of the connecting block (9). The base (1) is provided with an installation cavity (19), and the installation cavity (19) is connected to the connecting groove (3). The insert (20) is slidably installed inside the installation cavity (19), and the insert (20) is correspondingly arranged with the limiting hole (10). The compression spring (14) is movably installed inside the installation cavity (19), and the two ends of the compression spring (14) are fixedly connected to the base (1) and the insert (20) respectively.

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