Straight seam automatic welding device for stainless steel sintered mesh filter element

Abstract

The present application relates to the technical field of welding equipment, and relates to a straight seam automatic welding device for a stainless steel sintering screen filter element, which comprises a base, a variable-diameter structure is arranged on the base, the variable-diameter structure comprises a protractor disc which is rotationally connected with the base, one end of the protractor disc is provided with a protractor plate which is fixedly connected with the base, a plurality of slide pins which are synchronously retracted under the drive of the protractor disc are slidingly arranged on the protractor plate, the end portion of each slide pin is fixedly connected with an arc-shaped mounting block, the arc-shaped mounting blocks are fixedly installed with an arc-shaped spliced plate which has the same center, the base is further provided with a sliding splicing structure which cooperates with the variable-diameter structure, and the upper end of the base is further provided with a translation structure, the translation structure comprises a telescopic welding gun which can slide along the axis of the arc-shaped spliced plate and has the same center, and the problems of low efficiency, inability to adapt to flexible production of various products, uneven stress on both ends of the plate and continuous rebound of the sintering screen during the welding process in the prior art are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to an automatic welding device for straight seams of stainless steel sintered mesh filter elements. Background Technology

[0002] Stainless steel sintered mesh filter elements are formed by high-temperature vacuum sintering of multiple layers of metal wire mesh. They possess advantages such as high temperature resistance, corrosion resistance, stable filtration accuracy, and high strength, and are widely used in fluid filtration fields such as petrochemicals, water treatment, new energy lithium batteries, food and pharmaceuticals, and precision hydraulics. The finished sintered mesh filter elements are mostly cylindrical in shape. The core step in the production process is to roll the cut rectangular sintered mesh sheets into a circle and then continuously weld the straight seams of the sheets together to form a sealed cylindrical body.

[0003] At present, the industry has a high proportion of small-batch, multi-specification sintered mesh filter element production, and the outer diameter specifications of sintered mesh filter elements have a large range (from small φ20mm to large φ200mm). Different working conditions require different diameter sintered mesh filter elements.

[0004] 1. Traditional welding fixtures mostly adopt a fixed mandrel and fixed arc support block structure. A single set of fixtures can only be used for sintered mesh filter elements with a single outer diameter. When changing product specifications, it is necessary to manually disassemble and replace the entire set of support mandrels. The debugging and positioning takes up to 30-60 minutes, resulting in extremely low changeover efficiency and making it unsuitable for flexible production of multiple varieties.

[0005] 2. After manual rolling, there is a problem of plate springback when splicing straight seams of sintered mesh plates. Traditional tooling lacks an adaptive clamping mechanism and relies only on a single-sided pressure block to fix the plate. The plate is subjected to uneven force at both ends. During the welding process, the sintered mesh continues to spring back, and the width of the butt joint fluctuates greatly, resulting in misalignment and overlap defects. Summary of the Invention

[0006] In view of the above situation and to overcome the defects of the prior art, the present invention provides an automatic straight seam welding device for stainless steel sintered mesh filter elements, which effectively solves the problems of extremely low efficiency, inability to adapt to flexible production of multiple varieties, uneven stress at both ends of the plate, and continuous rebound of the sintered mesh during the welding process in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An automatic welding device for straight seams of stainless steel sintered mesh filter elements includes a base, on which a variable diameter structure is provided. The variable diameter structure includes an indexing plate rotatably connected to the base. One end of the indexing plate is provided with an indexing plate fixedly connected to the base. Several sliding pins are slidably arranged on the indexing plate, which are driven by the indexing plate and retract synchronously. An arc-shaped mounting block is fixedly connected to the end of the sliding pin. An arc-shaped splicing plate with the same center is fixedly installed on the arc-shaped mounting block. The base is also provided with a sliding splicing structure that cooperates with the variable diameter structure. The sliding splicing structure includes a first roller and a second roller that are slidably connected to each other along the surface of the arc-shaped splicing plate. A translation structure is also installed at the upper end of the base. The translation structure includes a telescopic welding gun that can slide along the axis with the same center of the arc-shaped splicing plate.

[0008] The variable diameter structure also includes a worm gear rotatably connected to the base, the worm gear meshing with a worm wheel, the worm wheel being fixedly connected to a rotating column rotatably connected to the indexing plate, and one end of the rotating column being fixedly connected to the indexing plate.

[0009] The indexing plate is provided with several arc-shaped guide grooves at equal angles around its circumference. The upper end of the sliding pin is fixedly connected to a second pin set in the arc-shaped guide groove. One end of the sliding pin is fixedly connected to the arc-shaped mounting block. The arc-shaped guide groove pulls all the sliding pins to expand and contract radially synchronously through the second pin, so as to realize the stepless change of the outer diameter of the arc-shaped splicing plate.

[0010] The sliding assembly structure also includes a motor fixedly mounted on the base plate. The output end of the motor is fixedly connected to a lead screw. One end of the base is slidably connected to a first slider. A limit stop is fixedly provided in the middle of the first slider. A screw cylinder that is threadedly engaged with the lead screw is fixedly installed on the inner wall of the limit stop.

[0011] The limiting block has two equal-distance second sliders that are slidably connected to the inner wall of the first slider. The first roller and the second roller are respectively rotatably mounted on the second slider. One end of the second slider is fixedly connected to a first pin that is slidably connected to the inner wall of the first slider. A spring is provided between the second slider and the first slider and is sleeved and connected to the first pin.

[0012] The first roller and the second roller are symmetrically arranged at both ends of the axis with the same center of the arc-shaped splicing plate.

[0013] A first cylinder is fixedly installed at one end of the base, and an installation slide plate is fixedly installed at the output end of the first cylinder. A pair of support columns fixedly arranged on both sides of the installation slide plate are slidably connected to a side plate at the upper end of the base. The inner wall of the installation slide plate is slidably arranged on the support columns, and the telescopic welding gun is fixedly arranged on the installation slide plate.

[0014] A pin block is fixedly provided at the lower end of the side plate at one end of the base and is slidably connected to the inner wall of the base bottom. A second cylinder is fixedly installed on the inner wall of the base bottom, and the output end of the second cylinder is fixedly installed on the pin block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The indexing plate has arc-shaped guide grooves at equal angles around its circumference. All sliding pins and their corresponding second pins are simultaneously embedded in the arc-shaped guide grooves. When the indexing plate rotates, the arc-shaped guide grooves apply synchronous traction to each second pin, causing all sliding pins to extend or retract synchronously along the radial direction of the indexing plate. All arc-shaped mounting blocks and arc-shaped splicing plates converge or expand synchronously. Each arc-shaped splicing plate always maintains the same center, forming a standard circular support surface. There will be no local offset or eccentricity issues, ensuring that the inner diameter of the rolled sintered mesh filter element fits the support fixture, avoiding elliptical deformation of the sintered mesh filter element. The arc-shaped guide grooves have a smooth and continuous curved trajectory, allowing the indexing plate to stop at any angle and the corresponding sliding pins to stop at any radial position. The outer diameter of the arc-shaped splicing plates can be continuously and steplessly adjusted, adapting to various intermediate specifications of sintered mesh filter elements.

[0016] 2. The second slider is slidably assembled inside the first slider via the first pin. With the help of the spring sleeved on the pin, the first roller and the second roller each have independent floating and buffering capabilities. When the plate rebounds, the first roller and the second roller can retreat slightly. The spring continuously outputs a constant elastic preload, always keeping it close to the surface of the plate, stabilizing the butt joint gap, and avoiding misalignment or sudden changes in the gap size. The second slider is equidistantly assembled at both ends of the limiting block, so that the distance between the first roller and the second roller relative to the middle straight seam is consistent. The compression and elastic pressure of the springs on both sides are equal, and there will be no situation where one side is too tightly pressed and the other side is not tightly pressed. The plate is subjected to uniform force on both sides, preventing the weld from shifting to one side. Attached Figure Description

[0017] Figure 1 This is an isometric view of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a schematic diagram of the structure of the first roller and the second roller of the present invention; Figure 4 This is a schematic diagram of the arc-shaped mounting block of the present invention; Figure 5 This is a schematic diagram of the indexing disk of the present invention; Figure 6 This is a schematic diagram of the indexing plate of the present invention; Figure 7 This is a schematic diagram of the mounting plate structure of the present invention; Figure 8 This is a schematic diagram of the structure of the first slider of the present invention; In the diagram: 1. Base, 2. First cylinder, 3. Worm gear, 4. Worm, 5. Mounting slide plate, 6. Support column, 7. Arc-shaped splicing plate, 8. First slider, 9. First pin, 10. Motor, 11. Lead screw, 12. Limit block, 13. Spring, 14. First roller, 15. Second roller, 16. Second slider, 17. Indexing plate, 18. Rotating column, 19. Indexing plate, 20. Sliding pin, 21. Arc-shaped mounting block, 22. Second pin, 23. Telescopic welding torch, 24. Rotating handle, 25. Screw barrel, 26. Second cylinder, 27. Pin block. Detailed Implementation

[0018] like Figure 1-8 As shown, an automatic welding device for straight seams of stainless steel sintered mesh filter elements includes a base 1, on which a variable diameter structure is provided. The variable diameter structure includes an indexing plate 17 rotatably connected to the base 1. One end of the indexing plate 17 is provided with an indexing plate 19 fixedly connected to the base 1. Several sliding pins 20 are slidably arranged on the indexing plate 19 and synchronously retracted by the indexing plate 17. An arc-shaped mounting block 21 is fixedly connected to the end of the sliding pin 20. An arc-shaped splicing plate 7 with the same center is fixedly installed on the arc-shaped mounting block 21. The base 1 is also provided with a sliding splicing structure that cooperates with the variable diameter structure. The sliding splicing structure includes a first roller 14 and a second roller 15 that are slidably connected to each other along the surface of the arc-shaped splicing plate 7. A translation structure is also installed on the upper end of the base 1. The translation structure includes a telescopic welding gun 23 that can slide along the axis with the same center of the arc-shaped splicing plate 7.

[0019] The variable diameter structure also includes a worm gear 4 rotatably connected to the base 1, the worm gear 4 meshing with a worm wheel 3, the worm wheel 3 being fixedly connected to a rotating column 18 rotatably connected to the indexing plate 19, and one end of the rotating column 18 being fixedly connected to the indexing disk 17.

[0020] like Figure 4 As shown, a handle 24 is provided at one end of the worm 4. The worm 4 rotates by rotating the handle 24, and the worm 4 meshes with the worm wheel 3 to rotate synchronously; the worm wheel 3 drives the rotating column 18 and the indexing plate 17 to rotate coaxially as a whole.

[0021] The indexing plate 17 is provided with several arc-shaped guide grooves at equal angles around its circumference. The upper end of the sliding pin 20 is fixedly connected to a second pin 22 disposed in the arc-shaped guide groove. One end of the sliding pin 20 is fixedly connected to the arc-shaped mounting block 21. The arc-shaped guide groove pulls all the sliding pins 20 to expand and contract radially synchronously through the second pin 22, so as to realize the stepless change of the outer diameter of the arc-shaped splicing plate 7.

[0022] like Figure 2 and 4As shown in Figure 5, the indexing plate 17 has arc-shaped guide grooves at equal angles around its circumference. All sliding pins 20 and their corresponding second pins 22 are synchronously embedded in the arc-shaped guide grooves. When the indexing plate 17 rotates, the arc-shaped guide grooves apply synchronous traction to each second pin 22. All sliding pins 20 extend or retract synchronously along the radial direction of the indexing plate 19. All arc-shaped mounting blocks 21 and arc-shaped splicing plates 7 converge or expand synchronously. Each arc-shaped splicing plate 7 always maintains the same center, forming a standard circular support surface. There will be no local offset or eccentricity problems, ensuring that the inner diameter of the rolled sintered mesh filter element fits the support fixture and avoiding elliptical deformation of the sintered mesh filter element. The arc-shaped guide grooves have a smooth and continuous curved trajectory. The indexing plate 17 can stop at any angle, and the corresponding sliding pins 20 can stop at any radial position. The outer diameter of the arc-shaped splicing plates 7 can be continuously and steplessly adjusted, which can adapt to various intermediate specifications of sintered mesh filter elements.

[0023] The sliding assembly structure also includes a motor 10 fixedly mounted on the base plate. The output end of the motor 10 is fixedly connected to a lead screw 11. One end of the base 1 is slidably connected to a first slider 8. A limit stop 12 is fixedly provided in the middle of the first slider 8. A screw cylinder 25 that is threadedly engaged with the lead screw 11 is fixedly installed on the inner wall of the limit stop 12.

[0024] like Figure 1-3 As shown, the output end of the motor 10 drives the lead screw 11 to rotate. The lead screw 11 engages with the screw barrel 25, converting the rotational motion of the motor 10 into the linear translational motion of the first slider 8 and the limit stop 12 as a whole. This controls the first roller 14 and the second roller 15 to move closer to or backward towards the sintered mesh filter element, completing the two actions of pressing the plate and releasing the sintered mesh filter element. The motor 10 can drive the lead screw 11 in both forward and reverse directions, freely adjusting the forward distance of the first slider 8 to flexibly adapt to the pressing requirements of sintered mesh filter elements of various diameters.

[0025] The limiting block 12 has two ends equidistantly provided with second sliders 16 that are slidably connected to the inner wall of the first slider 8. The first roller 14 and the second roller 15 are respectively rotatably provided on the second slider 16. One end of the second slider 16 is fixedly connected with a first pin 9 that is slidably connected to the inner wall of the first slider 8. A spring 13 that is sleeved and connected to the first pin 9 is provided between the second slider 16 and the first slider 8.

[0026] like Figure 2 and 3As shown, after the stainless steel sintered mesh is rolled into a circle, there is a continuous outward rebound stress. If the first roller 14 and the second roller 15 are rigidly fixed, the clamping force cannot adaptively compensate for the rebound, and the weld gap will continue to change. The second slider 16 is slidably assembled in the first slider 8 through the first pin 9. With the help of the spring 13 sleeved on the pin, the first roller 14 and the second roller 15 each have independent floating buffering capabilities. When the plate rebounds, the first roller 14 and the second roller 15 can retreat slightly. The spring 13 continuously outputs a constant elastic preload, always sticking to the surface of the plate, stabilizing the butt joint gap, and avoiding misalignment and sudden changes in the gap. The second slider 16 is equidistantly assembled at both ends of the limiting block 12, so that the distance between the first roller 14 and the second roller 15 and the middle straight seam is consistent. The compression and elastic pressure of the springs 13 on both sides are equal, and there will be no situation where one side is too tightly clamped and the other side is not tightly clamped. The plate is subjected to uniform force on both sides, preventing the weld from shifting to one side.

[0027] The first roller 14 and the second roller 15 are symmetrically arranged at both ends of the axis with the same center of the arc-shaped splicing plate 7.

[0028] like Figure 2 As shown, the first roller 14 and the second roller 15 are symmetrically arranged on both sides of the weld centerline, which can apply clamping force synchronously from the left and right sides of the straight seam. The force is uniform on both sides of the plate, and the butt joint gap will not shift due to the force on one side, thus ensuring the centering accuracy of the weld.

[0029] A first cylinder 2 is fixedly installed at one end of the base 1, and an installation slide plate 5 is fixedly installed at the output end of the first cylinder 2. A pair of support columns 6 are slidably connected to one side plate at the upper end of the base 1 and fixedly arranged on both sides of the installation slide plate 5. The inner wall of the installation slide plate 5 is slidably arranged on the support columns 6, and the telescopic welding gun 23 is fixedly arranged on the installation slide plate 5.

[0030] like Figure 7 As shown, the first cylinder 2 extends from the end of the base 1, pushing the mounting slide 5 and the two side support columns 6 to slide smoothly forward along the inner wall of the side plate. This drives the telescopic welding torch 23, fixed on the mounting slide 5, to move to the welding start end, where the telescopic welding torch 23 extends and aligns with the straight seam of the plate. The first cylinder 2 controls the mounting slide 5 to move longitudinally along the concentric axis of the arc-shaped splicing plate 7 at a uniform speed. The telescopic welding torch 23 moves synchronously and uniformly with the mounting slide 5, completing continuous welding operations along the entire straight seam. The telescopic structure of the telescopic welding torch 23 allows for real-time fine adjustment of the distance between the telescopic welding torch 23 and the plate, ensuring a stable welding arc length. After the telescopic welding torch 23 moves to the end of the straight seam, the first cylinder 2 stops feeding, completing the welding of the entire straight seam of the sintered mesh filter element cylinder.

[0031] A pin block 27 is fixedly provided at the lower end of the side plate at one end of the base 1 and is slidably connected to the inner wall of the bottom of the base 1. A second cylinder 26 is fixedly installed on the inner wall of the bottom of the base 1, and the output end of the second cylinder 26 is fixedly installed on the pin block 27.

[0032] like Figure 8 As shown, when it is necessary to remove the sintered mesh filter element body, the second cylinder 26 can be controlled to work. The output end of the second cylinder 26 drives the side plate at one end of the base 1 to slide to one end through the pin block 27, so that the first roller 14 and the second roller 15 can be pulled out from the lower end of the arc-shaped splicing plate 7, and the sintered mesh filter element body on the arc-shaped splicing plate 7 can be easily and quickly removed.

[0033] The working process of this invention is as follows: According to the target outer diameter of the sintered mesh filter element to be processed, since one end of the worm 4 is provided with a handle 24, the worm 4 is rotated by rotating the handle 24, and the worm 4 meshes with the worm wheel 3 to rotate synchronously; the worm wheel 3 drives the rotating column 18 and the indexing plate 17 to rotate coaxially as a whole.

[0034] Multiple arc-shaped guide grooves are evenly opened around the circumference of the indexing plate 17. The second pin 22 at the top of the sliding pin 20 is inserted into the arc-shaped guide groove. When the indexing plate 17 rotates, the arc-shaped guide groove pulls all the sliding pins 20 to extend and retract synchronously along the radial direction of the indexing plate 19 through the second pin 22.

[0035] The end of the sliding pin 20 is connected to the arc-shaped mounting block 21. The arc-shaped mounting block 21 drives the arc-shaped splicing plate 7 to converge or expand synchronously with the sliding pin 20, forming a concentric ring support surface. This enables stepless continuous adjustment of the outer diameter of the support. After adjusting to match the inner diameter of the current sintered mesh filter element, the worm gear 4 stops rotating, completing the specification switch. There is no need to replace the entire set of mandrel support, solving the pain point of time-consuming tooling changeover and low efficiency caused by traditional tooling. This is suitable for flexible production of multiple varieties.

[0036] The cut rectangular stainless steel sintered mesh sheet is wrapped between the arc-shaped splicing plate 7 and the first roller 14 and the second roller 15, with the middle part of the sheet aligned with the central axis of the circular support surface. The two ends of the sheet are joined to form a straight seam to be welded, with the central axis of the straight seam at both ends facing directly below the retractable welding gun on the outside of the device.

[0037] Start the drive motor 10, which drives the lead screw 11 to rotate. The lead screw 11 is threaded with the screw barrel 25, driving the limit block 12 and the first slider 8 to feed horizontally towards the arc-shaped splicing plate 7.

[0038] The second sliders 16 are symmetrically arranged on both sides inside the first slider 8. The two second sliders 16 are respectively equipped with the first roller 14 and the second roller 15. The first roller 14 and the second roller 15 are symmetrically distributed on both sides of the concentric axis of the arc-shaped splicing plate 7. During the forward and upward movement of the first slider 8, the first roller 14 and the second roller 15 synchronously adhere to the surface of the sintered mesh plate, and press the rolled plate tightly from both sides of the straight seam.

[0039] During the pressing process, the spring 13, which is sleeved on the first pin 9 between the second slider 16 and the first slider 8, continuously provides elastic preload, which can adaptively offset the rebound stress of the stainless steel sintered mesh itself, so that the gap between the plates is uniform throughout the process, avoiding welding defects such as uneven force, misalignment, overlap, and fluctuation in weld width caused by unilateral pressing.

[0040] The motor 10 continues to feed until the first roller 14 and the second roller 15 completely compact both sides of the joint of the plate. Then the motor 10 stops running and maintains the compacted positioning state.

[0041] The first cylinder 2 at the end of the base 1 extends, pushing the mounting slide plate 5 to slide smoothly forward along the two side support columns 6, which drives the telescopic welding gun 23 fixed on the mounting slide plate 5 to move to the welding start end. The telescopic welding gun 23 extends into place and aligns with the straight seam of the plate.

[0042] The first cylinder 2 controls the installation slide plate 5 to move longitudinally along the concentric axis of the arc-shaped splicing plate 7 at a uniform speed. The telescopic welding torch 23 moves synchronously and uniformly with the installation slide plate 5, completing continuous welding operations along the entire straight seam. The telescopic structure of the telescopic welding torch 23 can finely adjust the distance between the telescopic welding torch 23 and the plate in real time to ensure stable welding arc length.

[0043] After the telescopic welding torch 23 moves to the end of the straight seam, the first cylinder 2 stops feeding, completing the welding of the entire straight seam of the sintered mesh filter element cylinder.

[0044] When it is necessary to remove the sintered mesh filter element body, the second cylinder 26 can be controlled to work. The output end of the second cylinder 26 drives the side plate at one end of the base 1 to slide to one end through the pin block 27, so that the first roller 14 and the second roller 15 can be pulled out from the lower end of the arc-shaped splicing plate 7, and the sintered mesh filter element body on the arc-shaped splicing plate 7 can be easily and quickly removed.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for straight seams of stainless steel sintered mesh filter elements, comprising a base (1), characterized in that: It also includes a variable diameter structure, a sliding assembly structure, and a translation structure; the variable diameter structure is installed on the upper part of the base (1), and the variable diameter structure includes ---- (then write the position and connection relationship, as well as the included lower parts, try to divide it into several small sections to avoid one large paragraph) The base (1) is provided with a variable diameter structure, the variable diameter structure includes an indexing plate (17) rotatably connected to the base (1), one end of the indexing plate (17) is provided with an indexing plate (19) fixedly connected to the base (1), the indexing plate (19) is slidably provided with a number of sliding pins (20) that are driven by the indexing plate (17) and retract synchronously, the end of the sliding pin (20) is fixedly connected with an arc-shaped mounting block (21), the arc-shaped mounting block (21) is fixedly installed with an arc-shaped assembly plate (7) with the same center, the base (1) The base (1) is also equipped with a sliding assembly structure that cooperates with the variable diameter structure. The sliding assembly structure includes a first roller (14) and a second roller (15) that slide towards each other along the surface of the arc-shaped assembly plate (7). The upper end of the base (1) is also equipped with a translation structure. The translation structure includes a telescopic welding gun (23) that can slide along the axis of the arc-shaped assembly plate (7) with the same center. The indexing plate (17) is provided with several arc-shaped guide grooves at equal angles around its circumference. The upper end of the sliding pin (20) is fixedly connected to a second pin (22) set in the arc-shaped guide groove. One end of the sliding pin (20) is fixedly connected to the arc-shaped mounting block (21). The arc-shaped guide groove pulls all the sliding pins (20) to synchronously extend and retract radially through the second pin (22), so as to realize the stepless change of the outer diameter of the arc-shaped assembly plate (7).

2. The automatic welding device for straight seams of stainless steel sintered mesh filter element according to claim 1, characterized in that: The variable diameter structure also includes a worm (4) rotatably connected to the base (1), the worm (4) meshing with a worm wheel (3), the worm wheel (3) being fixedly connected to a rotating column (18) rotatably connected to the indexing plate (19), and one end of the rotating column (18) being fixedly connected to the indexing disk (17).

3. The automatic welding device for straight seams of stainless steel sintered mesh filter element according to claim 1, characterized in that: The sliding assembly structure also includes a motor (10) fixedly mounted on the base plate. The output end of the motor (10) is fixedly connected to a lead screw (11). One end of the base (1) is slidably connected to a first slider (8). A limit stop (12) is fixedly provided in the middle of the first slider (8). A screw cylinder (25) that is threadedly engaged with the lead screw (11) is fixedly installed on the inner wall of the limit stop (12).

4. The automatic welding device for straight seams of stainless steel sintered mesh filter element according to claim 1, characterized in that: The two ends of the limiting block (12) are equidistantly provided with a second slider (16) that is slidably connected to the inner wall of the first slider (8). The first roller (14) and the second roller (15) are respectively rotatably provided on the second slider (16). One end of the second slider (16) is fixedly connected with a first pin (9) that is slidably connected to the inner wall of the first slider (8). A spring (13) that is sleeved and connected to the first pin (9) is provided between the second slider (16) and the first slider (8).

5. The automatic welding device for straight seams of stainless steel sintered mesh filter elements according to claim 4, characterized in that: The first roller (14) and the second roller (15) are symmetrically arranged at both ends of the axis of the arc-shaped splicing plate (7) with the same center.

6. The automatic welding device for straight seams of stainless steel sintered mesh filter element according to claim 1, characterized in that: The base (1) is fixedly installed with a first cylinder (2) at one end, and the output end of the first cylinder (2) is fixedly installed with an installation plate (5). A pair of support columns (6) fixedly installed on both sides of the installation plate (5) are slidably connected to one side plate at the upper end of the base (1). The inner wall of the installation plate (5) is slidably installed on the support columns (6). The telescopic welding gun (23) is fixedly installed on the installation plate (5).

7. The automatic welding device for straight seams of stainless steel sintered mesh filter elements according to claim 1, characterized in that: A pin block (27) is fixedly provided at the lower end of the side plate at one end of the base (1) and is slidably connected to the inner wall of the bottom of the base (1). A second cylinder (26) is fixedly installed on the inner wall of the bottom of the base (1), and the output end of the second cylinder (26) is fixedly installed on the pin block (27).

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