Stainless steel welding device based on plasma arc welding machine

Abstract

The invention provides a stainless steel welding device based on a plasma arc welding machine, and relates to the technical field of stainless steel welding, the stainless steel welding device comprises a housing, a buffer wheel assembly, a first bearing, a clamping assembly, a first gear, a second gear, a first bearing, a transmission shaft, a second motor, a third gear, a fourth gear, a welding and polishing assembly and the like; the clamping assembly drives a bevel gear to conduct transmission through a first motor, a lead screw is driven to rotate, then a movable plate is controlled to stably move along a sliding groove, and stainless steel pipes of different diameter specifications are accurately clamped through a clamping plate. The rubber anti-skid wear-resistant layers and the anti-skid lines on the inner side faces of the clamping plates not only avoid damage to the surfaces of the pipes in the clamping process, but also greatly improve the clamping friction force, and effectively prevent the pipes from deviating and shaking in the welding process; and meanwhile, the clamping structures which are symmetrically arranged up and down ensure the coaxiality of the pipes, and a foundation is laid for high-quality welding.

Description

Technical Field

[0001] This invention relates to the field of stainless steel welding technology, and in particular to a stainless steel welding apparatus based on a plasma arc welding machine. Background Technology

[0002] In many fields such as industrial production, construction engineering, and pipeline laying, stainless steel has become a widely used key material due to its excellent corrosion resistance, high strength, and good processing performance. The connection of stainless steel pipes, plates, and other components often relies on welding processes. Among them, plasma arc welding has become one of the mainstream technologies for stainless steel welding due to its advantages such as concentrated energy, fast welding speed, high weld quality, and narrow heat-affected zone. It is especially suitable for scenarios with high requirements for welding precision and joint performance.

[0003] However, existing stainless steel welding equipment based on plasma arc welding machines still has many problems that need to be solved in practical applications: Firstly, the clamping stability is insufficient. Stainless steel components (especially pipes) need to maintain precise coaxiality and fixed posture during welding. Existing clamping devices mostly use a single clamping structure, which is difficult to adapt to stainless steel components of different diameters and specifications. Moreover, the clamping force is not accurately adjusted, which can easily lead to excessive clamping, causing damage to the surface of the component, or excessive clamping, causing the component to shift and shake during welding. This, in turn, affects the straightness of the weld, the uniformity of the penetration depth, and reduces the strength of the welded joint.

[0004] Secondly, there is a lack of effective buffering and protection mechanisms. During the clamping and positioning process, stainless steel components are prone to hard collisions with the internal structure of the device, resulting in scratches and deformation on the surface of the components. Especially for thin-walled stainless steel pipes, the stress generated by the collision may also affect the subsequent welding quality. At the same time, the small displacements of the components caused by thermal expansion and contraction during the welding process cannot be buffered and compensated, further aggravating the welding deviation.

[0005] Third, the welding and grinding processes are disconnected. After stainless steel welding, weld beads, spatter, and oxide scale often form at the weld seam, requiring separate grinding treatment. This not only increases the complexity of the process and the production cycle, but may also lead to insufficient grinding accuracy due to weld damage or positioning deviation during transportation, affecting the appearance quality and assembly precision of the components. The grinding mechanisms of the few existing integrated devices are mostly fixed structures, which cannot adaptively adjust according to the shape and position of the weld seam, resulting in poor grinding effect and easy damage to the base material around the weld seam.

[0006] Fourth, the protection and heat dissipation effects during the welding process are inadequate. High temperatures, arc light, and harmful gases are generated during plasma arc welding. The existing equipment's enclosure structure is not sufficiently sealed, which can easily lead to the leakage of harmful gases, endangering the health of operators. At the same time, arc light radiation also poses a safety hazard. In addition, the large amount of heat generated during welding is difficult to dissipate quickly. Excessive internal temperature can affect the service life of critical components such as motors and bearings, and may also cause uneven cooling of stainless steel components after welding, resulting in residual stress and causing component deformation.

[0007] Fifth, the synchronization and stability of the transmission mechanism are insufficient. During the welding process, if the component needs to be rotated for welding to ensure the quality of the circumferential weld, the transmission system of the existing device often has problems such as excessive gear meshing clearance and power transmission lag, which leads to asynchronous rotation of the clamping components on both sides, causing the component to twist and affecting the weld quality. At the same time, the moving adjustment mechanism of the welding gun and grinding head has low precision and cannot achieve accurate positioning and smooth movement, further limiting the precision of welding and grinding.

[0008] Therefore, in view of the shortcomings of existing technologies, there is an urgent need to develop a stainless steel welding device based on a plasma arc welding machine that has stable clamping, strong adaptability, buffer protection function, can realize integrated welding and grinding operation, and has excellent heat dissipation and protection effect, so as to meet the high requirements of industrial production for stainless steel welding quality and efficiency. Summary of the Invention

[0009] The purpose of this invention is to solve the above-mentioned problems by providing a stainless steel welding apparatus based on a plasma arc welding machine.

[0010] To address the aforementioned problems, this invention provides a technical solution: a stainless steel welding device based on a plasma arc welding machine, comprising a housing, a buffer wheel assembly, a first bearing, a clamping assembly, a first gear, a second gear, a first bearing, a transmission shaft, a second motor, a third gear, a fourth gear, and a welding and grinding assembly; clamping assemblies are provided on both the left and right sides of the housing cavity, and the clamping assemblies are movably connected to the housing cavity via the first bearings; buffer wheel assemblies are provided at the upper and lower ends of the outer side of the clamping assemblies; a first tube is provided on one side of the housing cavity, and a... The second tube; a first gear is fixedly connected to the outer surface of the clamping assembly; a second motor is fixedly connected to the upper end of the inner chamber of the cover, and a fourth gear is fixedly connected to the output end of the second motor; a drive shaft is movably connected to the upper end of the inner chamber of the cover via several first bearings; a third gear is fixedly connected to the middle position of the drive shaft, and the third gear meshes with the fourth gear; a second gear is fixedly connected to both ends of the drive shaft, and the second gear meshes with the corresponding first gear; a welding and grinding assembly is provided above the middle end of the inner chamber of the cover.

[0011] Preferably, the buffer wheel assembly includes a buffer cavity, a buffer plate, a buffer wheel, and a first spring; the buffer cavity is located inside the housing cavity; the buffer plate is slidably connected in the buffer cavity; the buffer wheel is fixedly connected to the inner side of the buffer plate, the first spring is fixedly connected to the outer side of the buffer plate, and the other end of the first spring is fixedly connected in the buffer cavity.

[0012] Preferably, the clamping assembly includes a rotating chamber, a first sliding groove, a first movable plate, a first connecting rod, a clamping plate, a bearing seat, a first lead screw, a first bevel gear, a second bevel gear, and a first motor. The rotating chamber is movably connected to the interior of the housing cavity via a first bearing, and a first gear is fixedly connected to the outer surface of the rotating chamber. A first motor is fixedly connected to the upper and lower end chamber walls of the rotating chamber, and a second bevel gear is fixedly connected to the output end of the first motor. Bearing seats are fixedly connected to the top and bottom of the upper and lower end chambers of the rotating chamber, and a first lead screw is movably connected between the bearing seats. A first bevel gear is fixedly connected to the first lead screw, and the first bevel gear meshes with the second bevel gear. First sliding grooves are provided on both sides of the upper and lower end chamber walls of the rotating chamber, and a first movable plate is slidably connected between the first sliding grooves. The first movable plate is threadedly connected to the first lead screw. A clamping plate is fixedly connected to the inner side of the first movable plate via two mutually spaced first connecting rods.

[0013] Preferably, the welding and grinding assembly includes a third motor, a second slide groove, a second lead screw, a second bearing, a first slider, a second slider, a first moving block, a second moving block, a second connecting rod, a welding gun, and a grinding head. A third motor is fixedly connected to the left side of the middle section of the housing cavity. A second lead screw is fixedly connected to the output end of the third motor, and the other end of the second lead screw is movably connected to the right side of the middle section of the housing cavity via a second bearing. A second slide groove is provided above the middle section of the housing cavity. Two spaced-apart first and second moving blocks are threaded onto the second lead screw, and the first and second moving blocks are fixedly connected together via a second connecting rod. A first slider is fixedly connected to the top of the first moving block, and a second slider is fixedly connected to the top of the second moving block. Both the first and second sliders are slidably connected to the second slide groove. A welding gun is connected below the first moving block, and a grinding head is connected below the second moving block.

[0014] Preferably, the grinding head includes a grinding assembly housing, a second movable plate, a second spring, a pneumatic cylinder, a mounting rod, a lifting rod, a pin, a bending rod, a U-shaped groove, a mounting block, and sandpaper; the grinding assembly housing is fixedly connected to the lower part of the second movable block; a pneumatic cylinder is fixedly connected to the top of the interior of the grinding assembly housing, and a second movable plate is slidably connected to the interior of the grinding assembly housing, the second movable plate being fixedly connected to the output end of the pneumatic cylinder; the front and rear sides of the lower surface of the second movable plate are fixedly connected to the grinding assembly housing. A second spring is connected; mounting rods are fixedly connected to both the front and rear ends of the lower surface of the grinding assembly cover; a lifting rod is fixedly connected to the middle of the lower surface of the second moving plate; a pin is fixedly connected to the end of each mounting rod; a U-shaped groove pre-set on the bending rod is slidably connected to the corresponding pin; the top of each bending rod is hinged to the end of the lifting rod, and a mounting block is fixedly connected to the inner side of the end of each bending rod; sandpaper is fixedly connected to the inner side of each mounting block, and the sandpaper is aligned with the weld seam between the first pipe and the second pipe.

[0015] Preferably, the inner side of the clamping plate is provided with an anti-slip and wear-resistant layer, which is made of rubber and has anti-slip texture on its surface.

[0016] Preferably, the outer surface of the cover is provided with heat dissipation holes, which are evenly distributed on the side wall of the cover, and a dustproof mesh is provided inside the heat dissipation holes.

[0017] Preferably, the welding gun is a plasma arc welding gun, and the nozzle of the welding gun is provided with a protective gas nozzle, which is connected to an external protective gas supply device.

[0018] The beneficial effects of the present invention are as follows: (1) Precise and stable clamping with strong adaptability: The clamping assembly is driven by a first motor to drive the bevel gear transmission, which drives the lead screw to rotate, thereby controlling the moving plate to move smoothly along the slide groove, so as to realize the precise clamping of stainless steel pipes of different diameters by the clamping plate. The rubber anti-slip wear-resistant layer and anti-slip texture on the inner side of the clamping plate not only avoids damage to the surface of the pipe during the clamping process, but also greatly improves the clamping friction, effectively preventing the pipe from shifting or shaking during welding; at the same time, the symmetrical clamping structure ensures the coaxiality of the pipe, laying the foundation for high-quality welding.

[0019] (2) Reliable buffer protection to ensure the integrity of the components: The buffer wheel assembly at the upper and lower ends of the outer side of the clamping component, through the cooperation of the buffer wheel and the first spring, achieves flexible contact when the pipe is clamped and positioned, effectively absorbing the impact force of the collision and avoiding scratches and deformation on the surface of the pipe; and during the welding process, it can buffer and compensate for the small displacement of the pipe caused by thermal expansion and contraction, reduce welding deviation, and ensure the structural integrity of the stainless steel components.

[0020] (3) Integrated welding and grinding improves efficiency and precision: The welding and grinding assembly integrates a plasma arc welding gun and an adaptive grinding head. The screw drive of the third motor enables the two to move synchronously and smoothly. Weld grinding can be performed immediately after welding without additional transfer procedures, which greatly shortens the production cycle. The grinding head is driven by a pneumatic cylinder to lift the rod. With the sliding connection of the bending rod and the pin, the opening angle and contact force of the grinding sandpaper can be adaptively adjusted to accurately match the shape of the weld. The grinding effect is uniform and avoids damage to the base material. At the same time, the setting of the second spring can buffer the grinding pressure and further improve the grinding precision.

[0021] (4) Excellent transmission synchronization and stable welding quality: The second motor drives the transmission shaft to rotate through the gear set, which in turn drives the clamping components on both sides to rotate synchronously, ensuring that the pipe rotates smoothly and without twisting during the welding of the annular weld, and that the weld penetration is uniform and the straightness is good; the movement of the welding gun and the grinding head is smooth and without jamming through the cooperation of the slider and the groove, with high positioning accuracy, effectively ensuring the consistency of welding and grinding, and improving the overall processing quality.

[0022] (5) It combines protection and heat dissipation, and has good safety and durability: The shell structure can effectively isolate the arc light and harmful gases generated during the welding process, protecting the health and safety of operators; the heat dissipation holes evenly distributed on the side wall of the shell accelerate the dissipation of internal heat, avoid high temperature affecting the service life of key components such as motors and bearings, and prevent the pipes from generating residual stress due to uneven cooling; the dustproof net inside the heat dissipation holes can block external dust from entering the device, reduce component wear, and extend the overall service life of the device.

[0023] (6) Sufficient welding protection and excellent weld performance: The welding gun adopts plasma arc welding technology, which has concentrated energy and fast welding speed. The protective gas nozzle at the nozzle is connected to the external protective gas supply device. During welding, a stable protective gas curtain can be formed in the weld area to isolate the air, effectively prevent the weld metal from oxidizing, reduce defects such as porosity and slag inclusion, and improve the corrosion resistance and mechanical properties of the weld.

[0024] (7) The structure is reasonable and the operation and maintenance are convenient: the modular design of each component of the device is compact and orderly, the transmission path is clear, and it is easy to assemble and maintain; the control logic of each motor, pneumatic cylinder and other power components is simple and easy to operate, and no complicated professional skills are required to complete the operation; at the same time, the sandpaper can be detached and connected through the mounting block, which is convenient for later replacement and reduces the cost of use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of the grinding head of the present invention during operation.

[0028] Figure 4 This is a partial structural schematic diagram of the clamping component of the present invention.

[0029] Figure 5 This is a schematic diagram of the welding and grinding assembly of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the buffer wheel assembly of the present invention.

[0031] Figure 7 This is a schematic diagram of the structure of the grinding head of the present invention.

[0032] Figure 8 This is a schematic diagram of the clamping plate of the present invention.

[0033] 1-Cover; 2-Buffer cavity; 3-Buffer plate; 4-Buffer wheel; 5-First spring; 6-First bearing; 7-Rotating chamber; 8-First slide groove; 9-First moving plate; 10-First connecting rod; 11-Clamping plate; 12-Bearing seat; 13-First lead screw; 14-First bevel gear; 15-Second bevel gear; 16-First motor; 17-First gear; 18-Second gear; 19-First bearing; 20-Drive shaft; 21-Second motor; 22-Third gear; 23-Fourth gear; 24 - Third motor; 25- Second slide rail; 26- Second lead screw; 27- Second bearing; 28- First slider; 29- Second slider; 30- First moving block; 31- Second moving block; 32- Second connecting rod; 33- Welding gun; 34- Grinding head; 35- Grinding component cover; 36- Second moving plate; 37- Second spring; 38- Pneumatic cylinder; 39- Mounting rod; 40- Lifting rod; 41- Pin; 42- Bending rod; 43- U-groove; 44- Mounting block; 45- Sandpaper. Detailed Implementation

[0034] like Figures 1 to 8As shown, this specific embodiment adopts the following technical solution: A stainless steel welding device based on a plasma arc welding machine includes a housing 1, a buffer wheel assembly, a first bearing 6, a clamping assembly, a first gear 17, a second gear 18, a first bearing 19, a transmission shaft 20, a second motor 21, a third gear 22, a fourth gear 23, and a welding and grinding assembly; the housing 1 has clamping assemblies symmetrically arranged on the left and right sides inside the chamber, and the clamping assemblies on both sides are used to fix the first pipe 46 and the second pipe 47 respectively, and the clamping assemblies are movably connected in the chamber of the housing 1 through the first bearing 6 to ensure that the clamping assemblies can rotate flexibly; the upper and lower ends of the outer side of the clamping assembly are provided with buffer wheel assemblies for buffer protection when clamping the pipes; the first pipe 46 is arranged on the left side inside the housing 1, and the second pipe 47 is arranged on the right side inside the housing 1, with the butt joint ends of the two pipes aligned with the welding area in the middle of the chamber of the housing 1; A first gear 17 is fixedly connected to the outer surface of the clamping assembly, serving as the driven component for power transmission; a second motor 21 is fixedly connected to the upper end of the cavity of the cover 1, and a fourth gear 23 is fixedly connected to the output end of the second motor 21 to provide power for rotational transmission; a transmission shaft 20 is movably connected to the upper end of the cavity of the cover 1 through two symmetrically distributed first bearings 19 to ensure the smooth rotation of the transmission shaft 20; a third gear 22 is fixedly connected to the middle position of the transmission shaft 20, and the third gear 22 and the fourth gear 23 mesh together to form a single-stage gear transmission; a second gear 18 is fixedly connected to both ends of the transmission shaft 20, and the second gear 18 meshes with the corresponding first gear 17 to achieve synchronous driving of the clamping assemblies on both sides; a welding and grinding assembly is provided above the middle of the cavity of the cover 1 to complete the integrated welding and grinding operation.

[0035] like Figure 6 As shown, the buffer wheel assembly includes a buffer cavity 2, a buffer plate 3, a buffer wheel 4, and a first spring 5. The buffer cavity 2 is symmetrically opened on both sides of the interior of the cover 1, located at the upper and lower ends of the clamping assembly. The buffer plate 3 is slidably connected in the buffer cavity 2, and the buffer plate 3 can slide laterally along the inner wall of the buffer cavity 2. The buffer wheel 4 is fixedly connected to the inner side of the buffer plate 3 through a rotating shaft. The buffer wheel 4 can roll as it contacts the pipe, reducing friction damage. The first spring 5 is fixedly connected to the outer side of the buffer plate 3. The other end of the first spring 5 is fixedly connected to the inner side wall of the buffer cavity 2, and the elastic deformation of the first spring 5 absorbs the impact force of the collision.

[0036] like Figure 4As shown, the clamping assembly includes a rotating chamber 7, a first sliding groove 8, a first moving plate 9, a first connecting rod 10, a clamping plate 11, a bearing seat 12, a first lead screw 13, a first bevel gear 14, a second bevel gear 15, and a first motor 16. The rotating chamber 7 is movably connected to the interior of the housing 1 via a first bearing 6. The rotating chamber 7 has a hollow cylindrical structure. A first gear 17 is fixedly connected to the outer surface of the rotating chamber 7 and rotates synchronously with the first gear 17. The first motor 16 is fixedly connected to the upper and lower end chamber walls of the rotating chamber 7. The two first motors 16 are symmetrically distributed. The second bevel gear 15 is fixedly connected to the output end of the first motor 16 to provide power for clamping drive. The top and bottom ends of the upper and lower end chambers of the rotating chamber 7 are fixedly connected to bearing seats 12. The upper and lower bearing seats 12 of each chamber are coaxially distributed and movably connected to each other. A first lead screw 13 is connected to ensure stable rotation of the first lead screw 13; a first bevel tooth 14 is fixedly connected to the middle position of the first lead screw 13, and the first bevel tooth 14 and the second bevel tooth 15 mesh together to form a bevel tooth transmission mechanism to realize the conversion of power direction; the upper and lower end chamber walls of the rotating chamber 7 are provided with first sliding grooves 8 on both sides, and the two first sliding grooves 8 in the same chamber are symmetrically and parallelly distributed. A first moving plate 9 is slidably connected between the first sliding grooves 8, and the first moving plate 9 can move smoothly along the first sliding groove 8. The first moving plate 9 is threadedly connected to the first lead screw 13 to realize that the rotation of the lead screw drives the moving plate to move linearly; a clamping plate 11 is fixedly connected to the inner side of the first moving plate 9 by two mutually spaced and parallel first connecting rods 10. The first connecting rods 10 play the role of connection and force transmission, and the clamping plate 11 is in direct contact with the surface of the pipe.

[0037] like Figure 5As shown, the welding and grinding assembly includes a third motor 24, a second slide groove 25, a second lead screw 26, a second bearing 27, a first slider 28, a second slider 29, a first moving block 30, a second moving block 31, a second connecting rod 32, a welding gun 33, and a grinding head 34. The third motor 24 is fixedly connected to the left side of the middle section of the cavity of the cover 1. The output end of the third motor 24 is fixedly connected to the second lead screw 26, providing power for the movement of the welding and grinding components. The other end of the second lead screw 26 is movably connected to the inner wall on the right side of the middle section of the cavity of the cover 1 via the second bearing 27, ensuring stable rotation of the second lead screw 26. A second slide groove 25 is provided above the middle section of the cavity of the cover 1, and the second slide groove 25 is horizontally distributed. Two mutually connected components are connected to the second lead screw 26 via threads. A first moving block 30 and a second moving block 31 are spaced apart, with the threads of the two moving blocks having the same direction. The first moving block 30 and the second moving block 31 are fixedly connected together by a second connecting rod 32 to achieve synchronous movement. A first slider 28 is fixedly connected to the top of the first moving block 30, and a second slider 29 is fixedly connected to the top of the second moving block 31. Both the first slider 28 and the second slider 29 are slidably connected to the second sliding groove 25 to ensure that the moving blocks move smoothly without deviation. A welding gun 33 is fixedly connected to the bottom of the first moving block 30 through a connector. The nozzle of the welding gun 33 is aimed at the butt weld of the two pipes. A grinding head 34 is fixedly connected to the bottom of the second moving block 31. The grinding head 34 and the welding gun 33 maintain a fixed distance to ensure that grinding can be performed immediately after welding.

[0038] like Figure 7As shown, the grinding head 34 includes a grinding assembly housing 35, a second moving plate 36, a second spring 37, a pneumatic cylinder 38, a mounting rod 39, a lifting rod 40, a pin 41, a bending rod 42, a U-shaped groove 43, a mounting block 44, and sandpaper 45. The grinding assembly housing 35 is bolted to the lower part of the second moving block 31, forming a closed mounting chamber. A pneumatic cylinder 38 is fixedly connected to the top of the chamber of the grinding assembly housing 35. The second moving plate 36 is slidably connected to the chamber of the grinding assembly housing 35. The second moving plate 36 can slide up and down along the inner wall of the chamber. The second moving plate 36 is fixedly connected to the output end of the pneumatic cylinder 38 and is driven to rise and fall by the pneumatic cylinder 38. Second springs 37 are fixedly connected between the front and rear sides of the lower surface of the second moving plate 36 and the bottom inner wall of the grinding assembly housing 35. The two second springs 37 are symmetrically distributed and play a role in buffering and resetting. The grinding assembly... Mounting rods 39 are fixedly connected to both the front and rear ends of the lower surface of the cover 35, and the mounting rods 39 extend vertically downwards; a lifting rod 40 is fixedly connected to the middle of the lower surface of the second moving plate 36, and the lifting rod 40 is perpendicular to the second moving plate 36; a pin 41 is fixedly connected to the end of each mounting rod 39, and the pin 41 is horizontally set; the U-shaped groove 43 pre-set on the bending rod 42 is slidably connected to the corresponding pin 41, so that the bending rod 42 can rotate around the pin 41. The bending rod 42 is rotated and slid; the top end of each bending rod 42 is hinged to the end of the lifting rod 40 through a hinge shaft. An installation block 44 is fixedly connected to the inner side of the end of each bending rod 42. The installation block 44 has an arc-shaped structure. A sandpaper 45 is fixedly connected to the inner side of each installation block 44 by screws. The arc of the sandpaper 45 is adapted to the outer wall of the pipe. The sandpaper 45 is aligned with the weld seam between the first pipe 46 and the second pipe 47 to ensure precise sanding.

[0039] like Figures 1 to 8 As shown, the inner side of the clamping plate 11 is provided with an anti-slip and wear-resistant layer. The anti-slip and wear-resistant layer is made of high-strength rubber material, and the surface is provided with uniformly distributed anti-slip textures. The anti-slip textures are horizontal or mesh-like structures, which not only enhance the clamping friction but also prevent damage to the pipe surface. The outer surface of the cover 1 is provided with multiple heat dissipation holes, which are evenly distributed on the four sides of the cover 1. The heat dissipation holes are provided with a metal dustproof mesh with a mesh diameter of 0.5-1mm, which takes into account both heat dissipation and dust prevention. The welding gun 33 is a plasma arc welding gun, and the nozzle of the welding gun 33 is provided with a ring-shaped distribution of protective gas nozzles. The protective gas nozzles are connected to an external protective gas supply device through a pipe. The protective gas is argon or helium, which provides an inert protective atmosphere for the weld.

[0040] The invention is used as follows: When in use, the first tube 46 and the second tube 47 are first placed into the clamping assemblies on both sides inside the cover 1. The ends of the tubes pass through the area between the buffer wheels 4. The buffer wheels 4 flexibly contact the surface of the tubes under the action of the first spring 5 to avoid collision damage during clamping. The first motor 16 is started, and the first motor 16 drives the second bevel tooth 15 to rotate. Through the meshing transmission between the second bevel tooth 15 and the first bevel tooth 14, the first lead screw 13 is driven to rotate, which in turn drives the first moving plate 9 to move inward along the first sliding groove 8. The clamping plate 11 is pushed by the first connecting rod 10 to clamp the tubes. The anti-slip and wear-resistant layer on the inner side of the clamping plate 11 ensures stable clamping without damage. The symmetrical clamping structure ensures the coaxiality of the tubes.

[0041] After the pipes are fixed, the second motor 21 is started. The second motor 21 drives the transmission shaft 20 to rotate through the meshing of the fourth gear 23 and the third gear 22. The second gears 18 at both ends of the transmission shaft 20 mesh with the first gears 17 of the clamping assemblies on both sides, driving the clamping assemblies on both sides to rotate synchronously, thereby driving the first pipe 46 and the second pipe 47 to rotate synchronously. At the same time, the third motor 24 is started. The third motor 24 drives the second lead screw 26 to rotate. Through the cooperation of the first slider 28, the second slider 29 and the second slide groove 25, the first moving block 30 and the second moving block 31 are driven to move synchronously in the horizontal direction. The welding gun 33 performs circumferential welding on the rotating pipe joint. The protective gas nozzle continuously sprays protective gas to prevent the weld from oxidizing. After completion, the third motor 24 continues to drive the grinding head 34 to move to the weld, and the pneumatic cylinder 38 is activated. The pneumatic cylinder 38 pushes the second moving plate 36 downward, causing the lifting rod 40 to descend. The bending rod 42 rotates around the pin 41 under the pull of the lifting rod 40, so that the sandpaper 45 on both sides fits against the weld surface. The second spring 37 buffers the grinding pressure. With the continuous rotation of the pipe and the movement of the grinding head 34, the weld is ground evenly in all directions. During the welding and grinding process, the heat dissipation holes on the side wall of the cover 1 quickly dissipate the internal heat, and the dustproof net blocks the entry of external dust, ensuring the stable operation of the device. After grinding is completed, all motors and pneumatic cylinders are turned off, the first motor 16 is started in reverse, the clamping plate 11 is released, and the processed pipe can be taken out.

[0042] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

[0045] The control method of this invention is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this invention is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

Claims

1. A stainless steel welding apparatus based on a plasma arc welding machine, characterized in that: It includes a housing (1), a buffer wheel assembly, a first bearing (6), a clamping assembly, a first gear (17), a second gear (18), a first bearing (19), a drive shaft (20), a second motor (21), a third gear (22), a fourth gear (23), and a welding and grinding assembly; The cover (1) is provided with clamping components on the left and right sides inside the cavity. The clamping components are movably connected in the cavity of the cover (1) through the first bearing (6). The clamping assembly is provided with buffer wheel assemblies at both the upper and lower ends of its outer side; The cover (1) has a first tube (46) on one side inside and a second tube (47) on the other side inside. A first gear (17) is fixedly connected to the outer surface of the clamping assembly. The upper end of the cavity of the cover (1) is fixedly connected to a second motor (21), and a fourth gear (23) is fixedly connected to the output end of the second motor (21). The upper end of the cavity of the cover (1) is movably connected to the drive shaft (20) through several first bearings (19). A third gear (22) is fixedly connected at the middle position of the transmission shaft (20), and the third gear (22) meshes with the fourth gear (23); A second gear (18) is fixedly connected to both ends of the drive shaft (20), and the second gear (18) meshes with the corresponding first gear (17). The housing (1) has a welding and grinding assembly located above the middle of its interior chamber.

2. The stainless steel welding apparatus based on a plasma arc welding machine according to claim 1, characterized in that: The buffer wheel assembly includes a buffer cavity (2), a buffer plate (3), a buffer wheel (4), and a first spring (5); The buffer cavity (2) is located inside the cavity of the cover (1); A buffer plate (3) is slidably connected in the buffer cavity (2); A buffer wheel (4) is fixedly connected to the inner side of the buffer plate (3), and a first spring (5) is fixedly connected to the outer side of the buffer plate (3). The other end of the first spring (5) is fixedly connected to the buffer cavity (2).

3. The stainless steel welding apparatus based on a plasma arc welding machine according to claim 1, characterized in that: The clamping assembly includes a rotating chamber (7), a first slide groove (8), a first moving plate (9), a first connecting rod (10), a clamping plate (11), a bearing seat (12), a first lead screw (13), a first bevel tooth (14), a second bevel tooth (15), and a first motor (16). The rotating chamber (7) is movably connected to the interior of the cover (1) via the first bearing (6), and the first gear (17) is fixedly connected to the outer surface of the rotating chamber (7). The upper and lower end chamber walls of the rotating chamber (7) are fixedly connected to a first motor (16), and the output end of the first motor (16) is fixedly connected to a second bevel gear (15). The top and bottom of the upper and lower end chambers of the rotating chamber (7) are fixedly connected to bearing seats (12), and the first lead screw (13) is movably connected between the bearing seats (12). A first bevel tooth (14) is fixedly connected to the first lead screw (13), and the first bevel tooth (14) and the second bevel tooth (15) mesh together; The upper and lower end chamber walls of the rotating chamber (7) are provided with first sliding grooves (8) on both sides. A first moving plate (9) is slidably connected between the first sliding grooves (8). The first moving plate (9) is threadedly connected to the first lead screw (13). The inner side of the first movable plate (9) is fixedly connected to a clamping plate (11) by two mutually spaced first connecting rods (10).

4. The stainless steel welding apparatus based on a plasma arc welding machine according to claim 1, characterized in that: The welding and grinding assembly includes a third motor (24), a second slide (25), a second lead screw (26), a second bearing (27), a first slider (28), a second slider (29), a first moving block (30), a second moving block (31), a second connecting rod (32), a welding gun (33), and a grinding head (34). A third motor (24) is fixedly connected to the left side of the middle of the cavity of the cover (1). A second lead screw (26) is fixedly connected to the output end of the third motor (24). The other end of the second lead screw (26) is movably connected to the right side of the middle of the cavity of the cover (1) through a second bearing (27). The cover (1) has a second sliding groove (25) located above the middle of the cavity; The second lead screw (26) is connected by two mutually spaced first moving blocks (30) and second moving blocks (31), and the first moving blocks (30) and second moving blocks (31) are fixedly connected together by a second connecting rod (32); A first slider (28) is fixedly connected to the top of the first movable block (30), and a second slider (29) is fixedly connected to the top of the second movable block (31). The first slider (28) and the second slider (29) are both slidably connected to the second slide groove (25). A welding gun (33) is connected below the first moving block (30), and a grinding head (34) is connected below the second moving block (31).

5. The stainless steel welding apparatus based on a plasma arc welding machine according to claim 4, characterized in that: The grinding head (34) includes a grinding assembly cover (35), a second moving plate (36), a second spring (37), a pneumatic cylinder (38), a mounting rod (39), a lifting rod (40), a pin (41), a bending rod (42), a U-shaped groove (43), a mounting block (44), and sandpaper (45). The polishing assembly housing (35) is fixedly connected to the lower part of the second moving block (31); A pneumatic cylinder (38) is fixedly connected to the top of the interior of the grinding component housing (35), and a second moving plate (36) is slidably connected to the interior of the grinding component housing (35). The second moving plate (36) is fixedly connected to the output end of the pneumatic cylinder (38). A second spring (37) is fixedly connected between the front and rear sides of the lower surface of the second movable plate (36) and the polishing assembly cover (35). Mounting rods (39) are fixedly connected to the front and rear ends of the lower surface of the grinding component cover (35). A lifting rod (40) is fixedly connected to the middle of the lower surface of the second movable plate (36); Each of the mounting rods (39) is fixedly connected to a pin (41). The U-shaped groove (43) pre-set on the bent rod (42) is slidably connected in the corresponding pin (41); The top of each of the bending rods (42) is hinged to the end of the lifting rod (40), and each of the inner sides of the end of the bending rods (42) is fixedly connected to an installation block (44). Sandpaper (45) is fixedly connected to the inner side of each mounting block (44), and the sandpaper (45) is aligned with the weld between the first pipe (46) and the second pipe (47).

6. The stainless steel welding apparatus based on a plasma arc welding machine according to claim 3, characterized in that: The inner side of the clamping plate (11) is provided with an anti-slip and wear-resistant layer, which is made of rubber material and has anti-slip texture on the surface.

7. The stainless steel welding apparatus based on a plasma arc welding machine according to claim 1, characterized in that: The outer surface of the cover (1) is provided with heat dissipation holes, which are evenly distributed on the side wall of the cover (1), and a dustproof mesh is provided inside the heat dissipation holes.

8. The stainless steel welding apparatus based on a plasma arc welding machine according to claim 4, characterized in that: The welding gun (33) is a plasma arc welding gun, and the nozzle of the welding gun (33) is provided with a protective gas nozzle, which is connected to an external protective gas supply device.

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