Assembly welding device for stainless steel bars

Abstract

The invention belongs to the technical field of welding equipment, and discloses an assembly welding device for stainless steel bars, which comprises a base and a welding frame fixed on the base, a laser welding gun is fixedly mounted on the welding frame, and two sliding seats are symmetrically and slidably connected to the base and located on two sides of the welding frame. The two sliding seats are each provided with a clamping assembly. The clamping assembly comprises a mounting frame arranged in the sliding seat and a plurality of guide rods fixedly mounted on the mounting frame, a sliding frame is slidably connected between the guide rods, a plurality of L-shaped rotating rods are rotatably connected to the sliding frame, a plurality of sliding columns slidably penetrate through the mounting frame in the circumferential direction in an array mode, and clamping plates are fixedly mounted at one ends of the sliding columns. Automatic butt joint of the two stainless steel bars is achieved through centering clamping of the clamping assembly and symmetrical sliding of the two sliding bases, dislocation and gaps are not prone to being generated, and the welding quality is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology, and specifically relates to a welding device for assembling stainless steel bars. Background Technology

[0002] Stainless steel bars often require assembly welding to accommodate different lengths. Existing assembly welding equipment for stainless steel bars typically uses two clamping devices to hold and fix two stainless steel bars to be connected, and then uses a laser welding gun to weld the gap between the two stainless steel bars. However, existing clamping devices are usually fixed, requiring the two stainless steel bars to be butt-jointed before clamping and fixing. The stainless steel bars are prone to movement during the clamping process, resulting in a larger gap between the two stainless steel bars, which may lead to problems such as incomplete welding or incomplete welding, affecting the welding quality. Summary of the Invention

[0003] The purpose of this invention is to provide a welding device for stainless steel bars, so as to solve the problem that the existing welding devices for stainless steel bars are inconvenient for joining stainless steel bars.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A welding device for stainless steel bars includes a base and a welding frame fixed on the base. A laser welding gun is fixedly installed on the welding frame. Two slide blocks are symmetrically slidably connected on both sides of the welding frame on the base. Each of the two slide blocks is provided with a clamping assembly.

[0006] The clamping assembly includes a mounting bracket disposed within a slide and multiple guide rods fixedly mounted on the mounting bracket. A slide frame is slidably connected between the multiple guide rods. Multiple L-shaped rotating rods arranged in a circumferential array are rotatably connected to the slide frame. Multiple sliding columns are slidably passed through the mounting bracket in a circumferential array. A clamping plate is fixedly mounted at one end of each of the multiple sliding columns. A slider is slidably connected to one side of each of the multiple clamping plates. One end of each of the multiple L-shaped rotating rods is rotatably connected to one of the multiple sliders. One side of each of the multiple L-shaped rotating rods abuts against the inner side of the mounting bracket.

[0007] Preferably, a double-ended screw is rotatably provided on the base, and two slides are respectively screwed to both ends of the double-ended screw.

[0008] Preferably, a sliding plate is slidably connected between the multiple guide rods. The sliding plate is located between the carriage and the multiple L-shaped rotating rods. One end of the multiple L-shaped rotating rods abuts against one side of the sliding plate. A multiple second spring is fixedly connected between the sliding plate and the carriage, and the multiple second springs are respectively sleeved on the outside of the multiple guide rods.

[0009] Preferably, a threaded cylinder is fixedly connected to one end of the slide, and a threaded sleeve is rotatably connected to the slide block, with the threaded sleeve screwed onto the outside of the threaded cylinder.

[0010] Preferably, the threaded sleeve and threaded cylinder in the two sets of clamping assemblies have opposite helical directions.

[0011] Preferably, a rotating cylinder is rotatably connected to the slide block, a second gear is coaxially fixed to the outer side of the rotating cylinder, and a first gear is coaxially fixed to the outer side of the threaded sleeve, with the first gear and the second gear meshing together.

[0012] Preferably, the base is provided with a rotating shaft that slides through the rotating cylinder, the rotating shaft is provided with a sliding groove, and a protrusion that slides within the sliding groove is fixedly installed on the inner side of the rotating cylinder.

[0013] Preferably, a ratchet is fixedly fixed at one end of the mounting bracket, a slide rod is slidably connected to one side of the slide block, a trapezoidal block is fixedly installed at the bottom of the slide rod, a first spring is fixedly connected between the top of the trapezoidal block and the slide block, and the ratchet is provided with a groove that mates with the trapezoidal block.

[0014] Preferably, a rotating frame is rotatably connected to one side of the slide, and a torsion spring is sleeved at the rotatable connection between the slide and the rotating frame. The two ends of the torsion spring are fixedly connected to the slide and the rotating frame respectively, and a limit plate is fixedly installed at the bottom of the rotating frame.

[0015] Preferably, a lifting plate is fixedly installed on the top of the slide rod, a locking block is fixedly installed on one end of the lifting plate, a slot is provided on the rotating frame to slide with the locking block, and a guide slope is provided on one end of the locking block.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) The present invention first clamps and fixes two stainless steel bars by two clamping components on two slides respectively, and then achieves the docking of the two stainless steel bars by moving the two slides in opposite directions, thereby ensuring that the two stainless steel bars are in close contact during welding and ensuring welding quality.

[0018] (2) The present invention is provided with a clamping assembly. The clamping assembly moves the slide to drive the L-shaped rotating rod to approach the mounting frame, so that the inner side of the mounting frame pushes multiple L-shaped rotating rods to rotate towards the inner side of the mounting frame. This causes the slider to push multiple clamping plates to move towards the center, thereby achieving the centering clamping of the stainless steel bar and thus preventing misalignment and displacement of the mating surfaces when the two stainless steel bars are joined.

[0019] (3) The present invention is provided with a ratchet and a trapezoidal block. When the rotating shaft rotates, the rotating cylinder drives the second gear to rotate. Through meshing transmission, the first gear drives the threaded sleeve to rotate. Due to the elasticity of the first spring, the trapezoidal block extends into the groove of the ratchet, so that the mounting frame has a certain resistance to prevent rotation. This causes the threaded cylinder to push the slide closer to the mounting frame, thereby achieving the clamping of the stainless steel bar. Then, as the rotating shaft continues to rotate, the clamping of the stainless steel bar prevents the slide from moving further. This causes the threaded sleeve to drive the threaded cylinder to rotate synchronously, so that the slide drives the mounting frame to rotate through the guide rod. At this time, the groove of the ratchet slides and engages with the inclined side of the trapezoidal block, so that the trapezoidal block compresses the first spring, so that the trapezoidal block no longer blocks the rotation of the mounting frame. This allows the clamping assembly to drive the stainless steel bar to rotate, thereby achieving automatic welding operation when the stainless steel bar rotates, which is highly efficient.

[0020] (4) In this invention, the stainless steel bar can be clamped by rotating the shaft alone, and after clamping and fixing, the stainless steel bar is driven to rotate, thereby realizing the automatic welding of the stainless steel bar assembly, which can reduce the equipment manufacturing cost and improve the processing efficiency.

[0021] (5) After welding, the present invention causes the rotating shaft to rotate in the opposite direction. At this time, the groove of the ratchet abuts against the right angle side of the trapezoidal block, so that the ratchet and the mounting bracket cannot rotate in the opposite direction. Thus, when the threaded sleeve rotates, the threaded cylinder drives the slide away from the mounting bracket, thereby pushing the slide plate through the second spring to make the L-shaped rotating rod rotate outward, so that multiple clamps loosen their grip on the stainless steel bar. The operation is simple and the efficiency is high.

[0022] (6) The present invention is equipped with a rotating frame and a limiting plate. When clamping and fixing the stainless steel bar, the limiting plate controls the distance between the welding end face and the corresponding slide to be equal. This makes it easy to make the mating position of the two stainless steel bars always located in the middle of the base, that is, directly below the laser welding gun, by symmetrically moving the two slides. This eliminates the need to frequently adjust the position of the laser welding gun and the mating surface, thus improving the overall efficiency.

[0023] (7) The present invention is provided with a torsion spring and a locking block. After the stainless steel bar is clamped and fixed, when the clamping assembly drives the stainless steel bar to rotate, the groove of the ratchet will cause the trapezoidal block to compress the first spring through the inclined surface of the trapezoidal block, causing the slide rod to drive the lifting plate to move upward, thereby causing the locking block to move upward and move out of the slot. At this time, under the action of the torsion spring, the rotating frame will automatically rotate away from the stainless steel bar, so as to avoid the limiting plate from obstructing the docking of the stainless steel bar. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a cross-sectional view of the present invention;

[0026] Figure 3 This is a cross-sectional view of the slide assembly of the present invention;

[0027] Figure 4 This is a perspective view of the slide assembly of the present invention;

[0028] Figure 5 This is a perspective view of the clamping assembly of the present invention;

[0029] Figure 6 This is an assembly cross-sectional view of the clamping assembly of the present invention;

[0030] Figure 7 This is a perspective view of the clamp assembly of the present invention;

[0031] Figure 8 This is a perspective view of the rotating frame assembly of the present invention;

[0032] Figure 9 This is a perspective view of the ratchet assembly of the present invention;

[0033] Figure 10 This is a perspective view of the trapezoidal block assembly of the present invention;

[0034] In the diagram: 1-base, 2-slide block, 3-first spring, 4-lifting plate, 5-block, 6-torsion spring, 7-slide rod, 8-trapezoidal block, 9-rotating frame, 10-limiting plate, 11-welding frame, 12-laser welding gun, 13-first gear, 14-threaded sleeve, 15-threaded cylinder, 16-second gear, 17-rotating cylinder, 18-double-ended screw, 19-rotating shaft, 20-ratchet, 21-protruding strip, 22-clamping plate, 23-slider, 24-L-shaped rotating rod, 25-slide plate, 26-slide carriage, 27-mounting frame, 28-slide column, 29-guide rod, 30-second spring. Detailed Implementation

[0035] To further understand the content of this invention, a detailed description of the invention is provided in conjunction with the accompanying drawings and embodiments. The structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the conditions under which the invention can be implemented and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation. It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0036] Please see Figures 1-10 As shown, the present invention provides the following technical solution:

[0037] A welding device for stainless steel bars includes a base 1 and a welding frame 11 fixed on the base 1. A laser welding gun 12 is fixedly installed on the welding frame 11. Two slide blocks 2 are symmetrically slidably connected on both sides of the welding frame 11 on the base 1. Each slide block 2 is provided with a clamping component.

[0038] The clamping assembly includes a mounting frame 27 disposed within the slide 2 and multiple guide rods 29 fixedly mounted on the mounting frame 27. A slide 26 is slidably connected between the multiple guide rods 29. Multiple L-shaped rotating rods 24 arranged in a circumferential array are rotatably connected to the slide 26. Multiple sliding columns 28 are slidably passed through the mounting frame 27 in a circumferential array. A clamping plate 22 is fixedly mounted at one end of each of the multiple sliding columns 28. A slider 23 is slidably connected to one side of each of the multiple clamping plates 22. One end of each of the multiple L-shaped rotating rods 24 is rotatably connected to one of the multiple sliders 23. One side of each of the multiple L-shaped rotating rods 24 abuts against the inner side of the mounting frame 27.

[0039] A double-headed screw 18 is rotatably mounted on the base 1, and two sliding blocks 2 are respectively screwed into the two ends of the double-headed screw 18;

[0040] A slide plate 25 is slidably connected between multiple guide rods 29. The slide plate 25 is located between the carriage 26 and multiple L-shaped rotating rods 24. One end of the multiple L-shaped rotating rods 24 abuts against one side of the slide plate 25. Multiple second springs 30 are fixedly connected between the slide plate 25 and the carriage 26, and the multiple second springs 30 are respectively sleeved on the outside of the multiple guide rods 29.

[0041] Based on the above-disclosed structure, when performing assembly welding operations on stainless steel bars:

[0042] First, insert the two stainless steel bars to be welded into the space between the multiple clamping plates 22 of the two clamping components. Then, slide the slide 26 close to the mounting frame 27, causing the slide 26 to move multiple L-shaped rotating rods close to the mounting frame 27. Since one side of the multiple L-shaped rotating rods 24 abuts against the inside of the mounting frame 27, the multiple L-shaped rotating rods 24 move the multiple sliders 23 at their ends toward the stainless steel bars, thereby pushing the multiple clamping plates 22 close to and abutting against the outside of the stainless steel bars. At the same time, the sliding column 28 slides inside the mounting frame 27, so that the multiple clamping plates 22 always face the stainless steel bars, thereby achieving the centering clamping of the stainless steel bars and preventing the stainless steel bars from tilting during the clamping process.

[0043] After both stainless steel bars are clamped and fixed by the clamping components, the double-headed screw 18 is driven to rotate, causing the two slides 2 to move the two clamping components to the center, thereby moving the two stainless steel bars to the center, so that the two stainless steel bars can be automatically connected and the connection surfaces are in close contact to ensure welding quality. In addition, since the stainless steel bars in the two clamping components are clamped in the center, the axes of the two stainless steel bars always coincide during connection, thereby avoiding misalignment of the two stainless steel bars and affecting the welding quality.

[0044] Then, by rotating the two clamping components synchronously, the two stainless steel bars are driven to rotate synchronously, so that the laser welding gun 12 on the welding frame 11 can automatically weld the mating surfaces of the two stainless steel bars around one circumference. Only one clamping operation is required, which is highly efficient.

[0045] After the assembly welding is completed, the sliding carriage 26 moves away from the mounting bracket 27. At this time, the elastic force of the second spring 30 pushes the slide plate 25 closer to the multiple L-shaped rotating rods 24, so that one side of the slide plate 25 pushes one side of the multiple L-shaped rotating rods 24, causing the multiple L-shaped rotating rods 24 to rotate outward. This causes the multiple sliders 23 to drive the multiple clamping plates 22 away from the stainless steel bar, thereby releasing the clamp and realizing the unloading operation.

[0046] Regarding the movement of the carriage 26 and the rotation of the clamping assembly, the following structure is preferably provided:

[0047] One end of the slide 26 is fixedly connected to a threaded cylinder 15, and a threaded sleeve 14 is rotatably connected to the slide 2. The threaded sleeve 14 is screwed onto the outside of the threaded cylinder 15.

[0048] The threaded sleeve 14 and threaded cylinder 15 in the two sets of clamping assemblies have opposite helical directions;

[0049] A rotating cylinder 17 is rotatably connected to the slide block 2. A second gear 16 is coaxially fixed to the outside of the rotating cylinder 17. A first gear 13 is coaxially fixed to the outside of the threaded sleeve 14. The first gear 13 and the second gear 16 are meshed together.

[0050] A rotating shaft 19 is rotatably mounted on the base 1, which slides through the rotating cylinder 17. A groove is provided on the rotating shaft 19, and a protrusion 21 that slides in the groove is fixedly installed on the inner side of the rotating cylinder 17.

[0051] A ratchet 20 is fixedly fixed at one end of the mounting bracket 27, a slide rod 7 is slidably connected to one side of the slide block 2, a trapezoidal block 8 is fixedly installed at the bottom of the slide rod 7, a first spring 3 is fixedly connected between the top of the trapezoidal block 8 and the slide block 2, and a groove is provided on the ratchet 20 to cooperate with the trapezoidal block 8.

[0052] As can be seen from the above, after the stainless steel bar is inserted between multiple clamping plates 22, the drive shaft 19 rotates, causing the groove on the shaft 19 to push the protrusion 21, causing the rotating cylinder 17 to rotate on the slide block 2. This causes the rotating cylinder 17 to drive the second gear 16 to rotate, and through the meshing transmission of the first gear 13 and the second gear 16, the first gear 13 drives the threaded sleeve 14 to rotate in the slide block 2. At this time, due to the elastic force of the first spring 3, the trapezoidal block 8 extends into the groove on the ratchet 20. If the mounting bracket 27 is to rotate, it needs to overcome the elastic force of the first spring 3. Therefore, at this time, the threaded sleeve 14 and the threaded cylinder 15 are screwed together to make the threaded cylinder 15 move towards the mounting bracket 27, thereby causing the threaded cylinder 15 to push the slide block 26 closer to the mounting bracket 27. In this way, the clamping assembly achieves the centering and clamping of the stainless steel bar through the above process.

[0053] After the stainless steel bar is clamped and fixed, multiple clamping plates 22 press against the stainless steel bar, preventing the L-shaped rotating rod from rotating towards the center. This prevents the slide 26 from approaching the mounting frame 27, and the threaded cylinder 15 from approaching the mounting frame 27. Consequently, the threaded sleeve 14 and the threaded cylinder 15 cannot rotate relative to each other. At this time, the threaded sleeve 14 drives the threaded cylinder 15 to rotate synchronously, causing the slide 26 to drive the mounting frame 27 to rotate via multiple guide rods 29. The mounting frame 27 drives the ratchet 20 to rotate. Since the stainless steel bar is not easily deformed, the mounting frame 27 has sufficient force to drive the ratchet 20 to rotate. The groove of the ratchet 20 pushes the inclined surface of the trapezoidal block 8, causing the trapezoidal block 8 to move upward. The trapezoidal block 8 drives the slide 7 to move upward and compress the first spring 3. Since the stainless steel bar is always clamped and fixed, the mounting frame 27 always drives the ratchet 20 to rotate, thereby driving the stainless steel bar to rotate via multiple clamping plates 22. This allows the two stainless steel bars to rotate synchronously, facilitating the welding operation of the laser welding gun 12.

[0054] Based on this, the stainless steel bar can be clamped simply by rotating the shaft 19, and after clamping and fixing, the clamping assembly drives the stainless steel bar to rotate, realizing automatic welding of the stainless steel bar assembly, reducing equipment manufacturing costs while improving processing efficiency.

[0055] In addition, after the stainless steel bars are welded together, the drive shaft 19 rotates in the opposite direction. At this time, the groove of the ratchet 20 abuts against the right-angle side of the trapezoidal block 8, so that the ratchet 20 cannot rotate in the opposite direction, and thus the mounting bracket 27 cannot rotate in the opposite direction. When the drive shaft 19 drives the threaded sleeve 14 to rotate through the rotating cylinder 17, the first gear 13 and the second gear 16, the threaded cylinder 15 rotates relative to the threaded sleeve 14, so that the threaded cylinder 15 drives the slide 26 away from the mounting bracket 27. Thus, the elastic force of the second spring 30 pushes the slide plate 25 to make multiple L-shaped rotating rods 24 rotate outward, so that multiple clamping plates 22 loosen their grip on the stainless steel bars. The operation is simple and efficient.

[0056] Furthermore, regarding the control of the position of the mating surfaces of the two stainless steel bars, the following structure is preferably provided:

[0057] A rotating frame 9 is rotatably connected to one side of the slide 2. A torsion spring 6 is sleeved at the rotatable connection between the slide 2 and the rotating frame 9. The two ends of the torsion spring are fixedly connected to the slide 2 and the rotating frame 9 respectively. A limit plate 10 is fixedly installed at the bottom of the rotating frame 9.

[0058] A lifting plate 4 is fixedly installed on the top of the slide rod 7. A locking block 5 is fixedly installed on one end of the lifting plate 4. The rotating frame 9 is provided with a slot that slides with the locking block 5. A guide slope is provided on one end of the locking block 5.

[0059] As can be seen from the above, when the stainless steel bar is clamped and fixed, the end of the stainless steel bar to be welded is made to abut against the limiting plate 10, thereby fixing the distance between the end of the stainless steel bar to be welded and the corresponding side of the slide 2. Thus, when the two slides 2 are moved symmetrically by the double-headed screw 18, the ends of the two stainless steel bars to be welded are also moved symmetrically. Thus, when the two stainless steel bars are butted together, the mating surface of the two stainless steel bars is located in the middle of the base 1, that is, directly below the laser welding gun. This eliminates the need to frequently adjust the position of the laser welding gun and improves the overall processing efficiency.

[0060] Furthermore, after the stainless steel bar is clamped and fixed, when the clamping assembly continues to drive the stainless steel bar to rotate, the groove of the ratchet 20 will cause the trapezoidal block 8 to move upward through the inclined surface of the trapezoidal block 8 and compress the first spring 3, thereby causing the slide rod 7 to drive the lifting plate 4 to move upward, causing the lifting plate 4 to drive the locking block 5 to move upward and move out of the locking slot on the rotating frame 9. Then, under the action of the torsion spring 6, the rotating frame 9 will rotate away from the stainless steel bar, thereby preventing the limiting plate from obstructing the docking of the stainless steel bar.

[0061] When fixing the next stainless steel bar, the rotating frame 9 is rotated in the opposite direction to overcome the force of the torsion spring 6, so that one side of the rotating frame 9 abuts against the guide slope of the locking block 5, and pushes the locking block 5 upward through the guide slope, so that the lifting plate 4 and the slide rod 7 drive the trapezoidal block 8 upward and compress the first spring 3, until the locking block 5 moves above the locking slot on the rotating frame 9, so that the trapezoidal block 8 drives the slide rod 7 and the lifting plate 4 downward under the elastic force of the first spring 3, so that the locking block 5 extends into the locking slot, thereby resetting the rotating frame 9 and the limiting plate 10, and the next stainless steel bar can be fixed.

[0062] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A welding apparatus for assembling stainless steel bars, characterized in that: It includes a base (1) and a welding frame (11) fixed on the base (1). A laser welding gun (12) is fixedly installed on the welding frame (11). Two slide blocks (2) are symmetrically slidably connected on both sides of the welding frame (11) on the base (1). Each of the two slide blocks (2) is provided with a clamping component. The clamping assembly includes a mounting bracket (27) disposed within the slide (2) and multiple guide rods (29) fixedly mounted on the mounting bracket (27). A slide frame (26) is slidably connected between the multiple guide rods (29). Multiple L-shaped rotating rods (24) arranged in a circumferential array are rotatably connected to the slide frame (26). Multiple sliding columns (28) are slidably passed through the mounting bracket (27) in a circumferential array. A clamping plate (22) is fixedly mounted at one end of each of the multiple sliding columns (28). A slider (23) is slidably connected to one side of each of the multiple clamping plates (22). One end of each of the multiple L-shaped rotating rods (24) is rotatably connected to one of the multiple sliders (23). One side of each of the multiple L-shaped rotating rods (24) abuts against the inner side of the mounting bracket (27).

2. The assembly and welding device for stainless steel bars according to claim 1, characterized in that: The base (1) is rotatably provided with a double-headed screw (18), and the two slides (2) are respectively screwed into the two ends of the double-headed screw (18).

3. The assembly and welding device for stainless steel bars according to claim 1, characterized in that: A sliding plate (25) is slidably connected between multiple guide rods (29). The sliding plate (25) is located between the carriage (26) and multiple L-shaped rotating rods (24). One end of the multiple L-shaped rotating rods (24) abuts against one side of the sliding plate (25). Multiple second springs (30) are fixedly connected between the sliding plate (25) and the carriage (26), and the multiple second springs (30) are respectively sleeved on the outside of the multiple guide rods (29).

4. The assembly and welding device for stainless steel bars according to claim 1, characterized in that: One end of the slide (26) is fixedly connected to a threaded cylinder (15), and a threaded sleeve (14) is rotatably connected to the slide (2), and the threaded sleeve (14) is screwed onto the outside of the threaded cylinder (15).

5. The assembly and welding device for stainless steel bars according to claim 4, characterized in that: The threaded sleeve (14) and threaded cylinder (15) in the two sets of clamping assemblies have opposite helical directions.

6. The assembly and welding device for stainless steel bars according to claim 4, characterized in that: A rotating cylinder (17) is rotatably connected to the slide (2). A second gear (16) is coaxially fixed to the outside of the rotating cylinder (17). A first gear (13) is coaxially fixed to the outside of the threaded sleeve (14). The first gear (13) and the second gear (16) are meshed together.

7. The assembly and welding device for stainless steel bars according to claim 6, characterized in that: The base (1) is provided with a rotating shaft (19) that slides through the rotating cylinder (17). The rotating shaft (19) is provided with a sliding groove. The inner side of the rotating cylinder (17) is fixedly installed with a protrusion (21) that slides in the sliding groove.

8. The assembly welding device for stainless steel bars according to claim 1, characterized in that: One end of the mounting bracket (27) is fixedly equipped with a ratchet (20), and a slide rod (7) is slidably connected to one side of the slide block (2). A trapezoidal block (8) is fixedly installed at the bottom of the slide rod (7), and a first spring (3) is fixedly connected between the top of the trapezoidal block (8) and the slide block (2). The ratchet (20) is provided with a groove that cooperates with the trapezoidal block (8).

9. The assembly welding device for stainless steel bars according to claim 8, characterized in that: A rotating frame (9) is rotatably connected to one side of the slide (2). A torsion spring (6) is sleeved at the rotatable connection between the slide (2) and the rotating frame (9). The two ends of the torsion spring are fixedly connected to the slide (2) and the rotating frame (9) respectively. A limit plate (10) is fixedly installed at the bottom of the rotating frame (9).

10. The assembly welding device for stainless steel bars according to claim 9, characterized in that: A lifting plate (4) is fixedly installed on the top of the slide rod (7), and a locking block (5) is fixedly installed on one end of the lifting plate (4). The rotating frame (9) is provided with a slot that slides with the locking block (5), and a guide slope is provided on one end of the locking block (5).

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