Welding fixture for metal part production and machining

Abstract

The invention relates to the technical field of metal welding fixtures, and discloses a welding fixture for metal part production and machining, which comprises a cylinder, two upper interlayers are rotatably connected to the outer wall of the cylinder, and two lower interlayers are rotatably connected to the bottom of the outer wall of the cylinder. When the telescopic pipe I extends, a conveying pipe is pressed to move towards a limiting assembly along the inner wall of a sliding pipe, at the moment, hydraulic oil in the conveying pipe is conveyed into a conveying square pipe through a hose and finally enters the telescopic pipe I, and the telescopic pipe I is forced to extend; and when the conveying pipe is pressed to contract, the corresponding first telescopic pipe extends, the conveying pipe forces the center of the large pipeline to coincide with the center of the lower interlayer, the rollers force the center of the small pipeline to coincide with the center of the upper interlayer, and rapid positioning of the centers of the pipelines of different sizes is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of metal welding fixtures, in particular to a welding fixture for producing and processing metal parts. Background Art

[0002] There are many special-shaped tubes in the components of automobiles and motorcycles. During the welding production of special-shaped tube assemblies, it is difficult to position the tubes due to their special shape. Generally, manual assistance is used to complete the work. However, due to the instability and limitations of manual labor, it is difficult to achieve precise positioning. The dimensional deviation of the special-shaped tubes after welding is large. At the same time, manual assisted positioning takes a long time, which makes it impossible to improve the welding efficiency. The processing technology of assembling special-shaped tubes by welding can produce parts with complex shapes and positions to meet special applications in the fields of energy, vehicles and electrical appliances, and has high requirements for sealing.

[0003] Among them, for example, welding of flue gas pipes, especially non-standard pipe welding, often requires the use of round pipe clamps. However, there are too many domestic non-standard products, which leads to the need to weld pipes of different diameters in actual applications. At this time, the round pipe clamps cannot ensure that the centers of the two pipes are at the same level. To address the above problems, the following solutions are proposed. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a welding fixture for producing and processing metal parts, comprising a cylinder, two upper interlayers being rotatably connected at the outer wall of the cylinder, and two lower interlayers being rotatably connected at the bottom of the outer wall of the cylinder, and further comprising: The limiting mechanism is rotatably connected to the outer wall of the lower interlayer, thereby driving the upper and lower interlayers to open outwards; The clamping mechanism is fixedly connected to the inner wall of the upper interlayer. When the upper interlayer drives the clamping mechanism to squeeze the metal round tube, the round tube will move closer to the center position of the upper interlayer and the lower interlayer; The limiting mechanism is fixedly connected to the side wall of the clamping mechanism and is used to position and clamp the round tube; Before use, place the device between the two pipes to be welded, ensuring that the pipe diameter between the upper interlayer is smaller and the pipe diameter inside the lower interlayer is larger.

[0005] Preferably, the limiting mechanism includes: A pressing assembly, the pressing assembly is rotatably connected to the bottom of the upper interlayer through a handle; The handle comprises a rotating rod rotatably connected to the bottom of the upper interlayer, a limiting rod is fixedly connected to the outer wall of the upper interlayer, and one end of the limiting rod away from the upper interlayer is fixedly connected to the bottom of the lower interlayer; Clamping assembly 1, clamping assembly 1 is fixedly connected to the inner wall of the upper interlayer through a contact piece; The contact member includes a hydraulic box 1 fixedly connected to the inner wall of the upper interlayer, and two telescopic tubes 1 are connected through the side wall of the hydraulic box 1; When the clamping mechanism contacts the outer wall of the circular tube with a larger diameter, the hydraulic oil inside the clamping mechanism will enter the interior of the telescopic tube 1 and clamp the tube with a smaller diameter.

[0006] Preferably, the clamping mechanism comprises: A pressure component, the pressure component is fixedly connected to the inner wall of the lower interlayer through a pressure piece; The pressure member includes a hydraulic box 2 fixedly connected to the inner wall of the lower interlayer, a through-tube is connected through the inner wall of the hydraulic box 2, a sliding tube is slidably connected to the inner wall of the through-tube, a piston plate is slidably connected to the inner wall of the sliding tube, and a transmission tube is connected through the side wall of the piston plate; A limiting assembly, the limiting assembly being fixedly connected to the inner wall of the through-tube via a blocking piece; The blocking member includes a partition fixedly connected to the inner wall of the through-tube, a sliding baffle 2 is slidably connected to the inner wall of the partition, a through hole 1 is opened on the side wall of the sliding baffle 2, and a through hole 2 is opened on the side wall of the partition; Among them, when the equipment clamps the pipeline, the transmission pipe will first contact the outer wall of the large pipeline, and squeeze the hydraulic oil inside the sliding tube into the inner wall of the telescopic tube 1, causing the telescopic tube 1 to extend.

[0007] Preferably, the limiting mechanism includes: A linkage assembly, the linkage assembly is fixedly connected to the top of the lower interlayer through a flow member; The flow member includes a transmission square tube fixedly connected to the top of the lower interlayer, an end of the transmission square tube away from the lower interlayer is connected to the side wall of the telescopic tube 1, a sliding baffle 1 is slidably connected to the inner wall of the transmission square tube, and a through hole 3 is opened on the outer wall of the sliding baffle 1; A positioning assembly, the positioning assembly is fixedly connected to the outer wall of the cylinder through a limiting member; The limiting member includes a second telescopic tube fixedly connected to the outer wall of the cylinder, and a second contact arc plate fixedly connected to one end of the telescopic tube away from the cylinder; Among them, when the rotating rod 1 moves outward under the extrusion force, the rotating rod 1 drives the sliding baffle 1 to slide along the inner wall of the transmission square tube through the linkage assembly. At this time, the through hole 3 will form a flow gap with the inner wall of the transmission square tube, so that the hydraulic oil of the transmission tube can flow to the telescopic tube 1 through the transmission square tube.

[0008] Preferably, the pressing assembly includes a torsion spring 1 fixedly connected to the inner wall of the rotating rod 1, and the other end of the torsion spring 1 is fixedly connected to the outer wall of the lower interlayer; When clamping, the worker presses the rotating rod 1 at both ends to force the rotating rod 1 to rotate. At this time, the outer wall of the rotating rod 1 will contact the outer wall of the limiting rod, and the compression force of the rotating rod 1 will be transmitted to the upper interlayer and the lower interlayer through the limiting rod, forcing the upper interlayer and the lower interlayer to open outward, and the torsion spring between the upper interlayer and the lower interlayer will continue to have potential energy.

[0009] Preferably, the clamping assembly comprises a contact block fixedly connected to an end of the telescopic tube away from the hydraulic box, and a roller is rotatably connected to the side wall of the contact block; Among them, when the telescopic tube extends outward, the roller will contact the outer wall of the small pipe. The contact of the two sets of contact blocks will force the pipe to approach the clamping center point of the upper interlayer and the lower interlayer, so that after the small pipe is clamped, it will be at the clamping center position of the upper interlayer; there are also rollers at the end of the transmission pipe.

[0010] Preferably, the pressure component includes a hose connected to the outer wall of the transmission pipe; Among them, when the end of the transmission pipe contacts the outer wall of the large pipe, the transmission pipe will be compressed and move along the inner wall of the sliding tube toward the limit assembly. At this time, the hydraulic oil inside the transmission pipe will be transmitted to the inside of the transmission square tube through the hose, and finally enter the inside of the telescopic tube 1, forcing the telescopic tube 1 to extend.

[0011] Preferably, the limiting assembly includes a spring 1 fixedly connected to the side wall of the partition, an end of the spring 1 away from the partition is fixedly connected to the side wall of the sliding tube, and a spring 2 is fixedly connected to the bottom of the sliding baffle 2; Among them, when the piston plate slides along the inner wall of the sliding tube, if the outer wall of the contact block has contacted the outer wall of the small pipe, the compressive force will force the sliding tube to slide along the inner wall of the through tube, and transmit the hydraulic oil inside the through tube to the inside of the hydraulic box 2, forcing another set of pressure components to extend.

[0012] Preferably, the linkage assembly includes an L-shaped plate fixedly connected to one side wall of the sliding baffle, the side wall of the L-shaped plate is fixedly connected to the inclined panel, the inner wall of the sliding baffle second is slidably connected to the rotating rod second, the side wall of the inclined panel is rotatably connected to the rotating rod third, and the end of the rotating rod third away from the inclined panel is rotatably connected to the side wall of the rotating rod first; Among them, when the rotating rod 1 rotates outward, it will drive the inclined plate and the L-shaped plate to move outward synchronously. At this time, the inclined surface of the inclined plate will force the rotating rod 2 and the sliding baffle 2 to slide upward synchronously, so that the through hole 1 coincides with the through hole 2, and the L-shaped plate drives the sliding baffle 1 to move synchronously, so that the through hole 3 coincides with the transmission square tube, so that the hydraulic oil can flow.

[0013] Preferably, the positioning assembly includes a flow square tube connected to the bottom of the telescopic tube 2, an end of the flow square tube away from the telescopic tube 2 is connected to the pressure piston tube, and the output end of the pressure piston tube is fixedly connected to the contact arc plate 3; When the transmission pipe compresses the large pipe, the large pipe will contact the outer wall of the contact arc plate three, and force the hydraulic oil inside the pressurized piston tube to be transmitted to the inner wall of the telescopic tube two through the flow square tube.

[0014] The present invention has the following beneficial effects: (1) The present invention utilizes the characteristic that most pipes are circular, and a clamping component and a pressure component are provided inside the device. When the end of the transmission pipe contacts the outer wall of the large pipe, the transmission pipe will be compressed and move along the inner wall of the sliding pipe toward the limit component. At this time, the hydraulic oil inside the transmission pipe will be transmitted to the inside of the transmission square pipe through the hose, and finally enter the inside of the telescopic pipe, forcing the telescopic pipe to extend, forcing the telescopic pipe to drive the contact block, a roller, to contact the outer wall of the small pipe. Since the upper interlayer and the lower interlayer are expanded and contracted synchronously, the clamping centers of the two are equal. When the transmission pipe is compressed and contracted, the corresponding telescopic pipe will also extend. The transmission pipe will force the center of the large pipe to coincide with the center of the lower interlayer, and the roller will force the center of the small pipe to coincide with the center of the upper interlayer. Through the application of the above components, the device can quickly locate the centers of pipes of different sizes.

[0015] (2) The present invention utilizes the characteristic that the piston plate slides along the outer wall of the sliding tube. The side wall of a single hydraulic box 2 is connected to two through tubes. When the piston plate slides along the inner wall of the sliding tube, if the outer wall of the contact block has come into contact with the outer wall of the small pipe, the pressure on the transmission pipe will force the sliding pipe to slide along the inner wall of the through tube and transmit the hydraulic oil inside the through tube to the inside of the hydraulic box 2, forcing another group of pressure components to extend. Through the above design, multiple pressure components can clamp the outer wall of the pipe at the same time, ensuring that the pressure clamping is stable and the equipment can adapt to pipes of different diameters.

[0016] (3) The present invention utilizes the characteristic that when the rotating rod 1 is subjected to external pressure, it first rotates, and after contacting the outer wall of the limit rod, it forces the upper interlayer and the lower interlayer to rotate. After the device completes the clamping, the torsion spring 1 will release the mechanical power, forcing the rotating rod 1 to reset, and the rotating rod 1 will drive the L-shaped plate to reset. In this process, the through hole 3 will be completely dislocated with the inner wall of the transmission square tube, and the sliding baffle 2 will be pulled by the spring 2, so that the through hole 1 and the through hole 2 are completely dislocated. Through the application of the above components, the hydraulic oil inside the device can no longer flow. At this time, the hydraulic oil inside the transmission pipe, the hydraulic oil inside the through pipe and the hydraulic oil inside the telescopic pipe 1 are all in the sealed space. Through the application of the above components, it is ensured that after the device completes the clamping, the thrust generated by the external welding will not cause the pipeline to be dislocated.

[0017] (4) The present invention utilizes the characteristic that after the above-mentioned equipment completes clamping, the roller is in contact with the pipe. When the worker completes single-sided welding, the worker can rotate the pipe so that the unwelded side of the pipe faces the working area, ensuring that after the equipment completes single-sided welding, welding can be performed on the remaining positions without removing the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the working state of the overall structure of the present invention; Figure 3 is a schematic cross-sectional view of a press-fit assembly according to the present invention; Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram; Figure 5 This is a cross-sectional schematic diagram of a clamping assembly according to the present invention; Figure 6 It is a cross-sectional schematic diagram of the clamping mechanism of the present invention; Figure 7 For the present invention Figure 6 A is an enlarged schematic diagram; Figure 8 It is a cross-sectional schematic diagram of the pressure component of the present invention; Figure 9 For the present invention Figure 8 A magnified schematic diagram of middle C; Figure 10 It is a schematic cross-sectional view of the positioning assembly of the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows: In the figure: 1. Restriction mechanism; 11. Pressing assembly; 12. Clamping assembly 1; 13. Cylinder; 14. Upper interlayer; 15. Lower interlayer; 111. Rotating rod 1; 112. Limiting rod; 113. Torsion spring 1; 121. Hydraulic box 1; 122. Telescopic tube 1; 123. Contact block; 124. Roller; 2. Clamping mechanism; 21. Pressure assembly; 22. Limiting assembly; 211. Hydraulic box 2; 212. Through pipe; 213. Sliding pipe; 214. Piston plate; 215. Transmission pipe; 216. Hose; 22 1. Partition; 222. Spring 1; 223. Sliding baffle 2; 224. Through hole 1; 225. Through hole 2; 226. Spring 2; 3. Limiting mechanism; 31. Linkage assembly; 32. Positioning assembly; 311. Transmission square tube; 312. Sliding baffle 1; 313. Through hole 3; 314. L-shaped plate; 315. Inclined plate; 316. Rotating rod 2; 317. Rotating rod 3; 321. Telescopic tube 2; 322. Contact arc plate 2; 323. Pressure piston tube; 324. Contact arc plate 3; 325. Flow square tube. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] For example 1, please refer to Figures 1-8 The present invention is a welding fixture for producing and processing metal parts, comprising a cylinder 13, two upper interlayers 14 being rotatably connected to the outer wall of the cylinder 13, and two lower interlayers 15 being rotatably connected to the bottom of the outer wall of the cylinder 13, and further comprising: The limiting mechanism 1 is rotatably connected to the outer wall of the lower interlayer 15, thereby driving the upper interlayer 14 and the lower interlayer 15 to open outwards; The clamping mechanism 2 is fixedly connected to the inner wall of the upper interlayer 14. When the upper interlayer 14 drives the clamping mechanism 2 to squeeze the metal tube, the tube will move closer to the center position of the upper interlayer 14 and the lower interlayer 15; The limiting mechanism 3 is fixedly connected to the side wall of the clamping mechanism 2 and is used to position and clamp the round tube; Before use, the device is placed between the two pipes to be welded, ensuring that the pipe diameter between the upper interlayer 14 is smaller, while the pipe diameter inside the lower interlayer 15 is larger; The upper interlayer 14 and the lower interlayer 15 are a group of left and right. A torsion spring is provided inside the upper interlayer 14 and the lower interlayer 15. After the upper interlayer 14 and the lower interlayer 15 are opened outward, the torsion spring will continue to generate potential energy. Restriction agencies 1 include: The pressing assembly 11 is rotatably connected to the bottom of the upper interlayer 14 through a handle; The handle comprises a rotating rod 111 rotatably connected to the bottom of the upper interlayer 14, a limiting rod 112 is fixedly connected to the outer wall of the upper interlayer 14, and an end of the limiting rod 112 away from the upper interlayer 14 is fixedly connected to the bottom of the lower interlayer 15; The clamping component 12 is fixedly connected to the inner wall of the upper interlayer 14 through a contact piece; The contact member includes a hydraulic box 121 fixedly connected to the inner wall of the upper interlayer 14, and two telescopic tubes 122 are connected through the side wall of the hydraulic box 121; Among them, when clamping, the staff first presses the rotating rod 111 to force the rotating rod 111 to rotate. At this time, the outer wall of the rotating rod 111 will contact the outer wall of the limiting rod 112, and the compression force of the rotating rod 111 will be transmitted to the upper interlayer 14 and the lower interlayer 15 through the limiting rod 112, forcing the upper interlayer 14 and the lower interlayer 15 to open outward, and the torsion spring between the upper interlayer 14 and the lower interlayer 15 will continue to have potential energy. Then the worker releases his pressing palm, and the torsion spring will drive the upper interlayer 14 and the lower interlayer 15 to clamp the pipe.

[0023] The clamping mechanism 2 comprises: A pressure component 21, which is fixedly connected to the inner wall of the lower interlayer 15 through a pressure piece; The pressure member includes a second hydraulic box 211 fixedly connected to the inner wall of the lower interlayer 15. A through-tube 212 is connected to the inner wall of the second hydraulic box 211. A sliding tube 213 is slidably connected to the inner wall of the through-tube 212. A piston plate 214 is slidably connected to the inner wall of the sliding tube 213. A transmission tube 215 is connected to the side wall of the piston plate 214. The limiting assembly 22 is fixedly connected to the inner wall of the through pipe 212 through a blocking member; The blocking member includes a partition 221 fixedly connected to the inner wall of the through pipe 212, a second sliding baffle 223 slidably connected to the inner wall of the partition 221, a first through hole 224 is opened on the side wall of the second sliding baffle 223, and a second through hole 225 is opened on the side wall of the partition 221; Among them, taking advantage of the fact that most pipes are round, a clamping component 12 and a pressure component 21 are set inside the device. When the end of the transmission pipe 215 contacts the outer wall of the large pipe, the transmission pipe 215 will be pressed and move along the inner wall of the sliding pipe 213 toward the direction of the limit component 22. At this time, the hydraulic oil inside the transmission pipe 215 will be transmitted to the inside of the transmission square pipe 311 through the hose 216, and finally enter the inside of the telescopic pipe 122, forcing the telescopic pipe 122 to extend and forcing the telescopic pipe 122 to move. The movable contact block 123 and the roller 124 are in contact with the outer wall of the small pipe. Since the upper interlayer 14 and the lower interlayer 15 expand and contract synchronously, the clamping centers of the two are equal. When the transmission pipe 215 is compressed and contracted, the corresponding telescopic tube 122 will also extend. The transmission pipe 215 will force the center of the large pipe to coincide with the center of the lower interlayer 15, and the roller 124 will force the center of the small pipe to coincide with the center of the upper interlayer 14. Through the application of the above components, the equipment can quickly locate the centers of pipes of different sizes.

[0024] The limiting mechanism 3 includes: The linkage assembly 31 is fixedly connected to the top of the lower interlayer 15 through a fluid component; The flow element includes a transmission square tube 311 fixedly connected to the top of the lower interlayer 15. The end of the transmission square tube 311 away from the lower interlayer 15 is connected to the side wall of the telescopic tube 122. The inner wall of the transmission square tube 311 is slidably connected to a sliding baffle 1 312. The outer wall of the sliding baffle 1 312 is provided with a through hole 313. A positioning assembly 32, the positioning assembly 32 is fixedly connected to the outer wall of the cylinder 13 through a limiting member; The limiting member includes a second telescopic tube 321 fixedly connected to the outer wall of the cylinder 13, and a second contact arc plate 322 is fixedly connected to one end of the second telescopic tube 321 away from the cylinder 13; Among them, when the rotating rod 111 moves outward under the extrusion force, the rotating rod 111 drives the sliding baffle 1 312 to slide along the inner wall of the transmission square tube 311 through the linkage assembly 31. At this time, the through hole 313 will form a flow gap with the inner wall of the transmission square tube 311, so that the hydraulic oil in the transmission tube 215 can flow to the telescopic tube 1 122 through the transmission square tube 311.

[0025] For example 2, please refer to Figure 2-Figure 10 The present invention is a welding fixture for producing and processing metal parts. Based on Example 1, the pressing assembly 11 includes a torsion spring 113 fixedly connected to the inner wall of the rotating rod 111, and the other end of the torsion spring 113 is fixedly connected to the outer wall of the lower interlayer 15; When clamping, the worker presses the rotating rod 111 at both ends to force the rotating rod 111 to rotate. At this time, the outer wall of the rotating rod 111 will contact the outer wall of the limiting rod 112, and the compression force of the rotating rod 111 will be transmitted to the upper interlayer 14 and the lower interlayer 15 through the limiting rod 112, forcing the upper interlayer 14 and the lower interlayer 15 to open outward, and the torsion spring between the upper interlayer 14 and the lower interlayer 15 will continue to have potential energy.

[0026] The clamping assembly 12 includes a contact block 123 fixedly connected to an end of the telescopic tube 122 away from the hydraulic box 121, and a roller 124 is rotatably connected to the side wall of the contact block 123; When the telescopic tube 122 extends outward, the roller 124 will contact the outer wall of the small pipe. The contact of the two sets of contact blocks 123 will force the pipe to approach the clamping center point of the upper interlayer 14 and the lower interlayer 15, so that after the small pipe is clamped, it is at the clamping center position of the upper interlayer 14; there is also a roller 124 at the end of the transmission pipe 215.

[0027] The pressure component 21 includes a hose 216 that is connected to the outer wall of the transmission pipe 215; Among them, utilizing the characteristic that the above-mentioned piston plate 214 slides along the outer wall of the sliding tube 213, the side wall of a single hydraulic box 211 will be connected through two through tubes 212. In the process of the piston plate 214 sliding along the inner wall of the sliding tube 213, if the outer wall of the contact block 123 has contacted the outer wall of the small pipe, the pressure force of the transmission pipe 215 will force the sliding tube 213 to slide along the inner wall of the through tube 212, and transmit the hydraulic oil inside the through tube 212 to the inside of the hydraulic box 211, forcing another group of pressure components 21 to extend. Through the above design, multiple pressure components 21 can clamp the outer wall of the pipe at the same time, ensuring the stability of the pressure clamping while ensuring that the equipment can adapt to pipes of different diameters.

[0028] The limiting assembly 22 includes a spring 1 222 fixedly connected to the side wall of the partition 221. The end of the spring 1 222 away from the partition 221 is fixedly connected to the side wall of the sliding tube 213. The bottom of the sliding baffle 223 is fixedly connected to a spring 226. Among them, after the equipment completes clamping, the torsion spring 113 will release mechanical power, forcing the rotating rod 111 to reset, and the rotating rod 111 will drive the L-shaped plate 314 to reset. In this process, the through hole 313 will be completely dislocated with the inner wall of the transmission square tube 311, and the sliding baffle 223 will be pulled by the spring 226, so that the through hole 1 224 and the through hole 2 225 are completely dislocated. Through the application of the above components, the hydraulic oil inside the equipment can no longer flow. At this time, the hydraulic oil inside the transmission pipe 215, the hydraulic oil inside the through pipe 212 and the hydraulic oil inside the telescopic pipe 122 are all in the sealed space. Through the application of the above components, it is ensured that after the equipment completes clamping, the thrust generated by the external welding will not cause the pipeline to deviate.

[0029] The linkage assembly 31 includes an L-shaped plate 314 fixedly connected to the side wall of the sliding baffle 1 312, an inclined plate 315 fixedly connected to the side wall of the L-shaped plate 314, a second rotating rod 316 slidably connected to the inner wall of the sliding baffle 223, a third rotating rod 317 rotatably connected to the side wall of the inclined plate 315, and an end of the third rotating rod 317 away from the inclined plate 315 is rotatably connected to the side wall of the first rotating rod 111; Among them, the rotating rod 111 first rotates when subjected to external pressure, and after contacting the outer wall of the limit rod 112, the upper interlayer 14 and the lower interlayer 15 are forced to rotate. A linkage component 31 is provided inside the equipment, wherein, when the rotating rod 111 rotates outward, the torsion spring 113 will rotate and drive the inclined plate 315 to move synchronously through the rotating rod 317, and at this time, the inclined plate 315 and the L-shaped plate 314 will be driven to move outward synchronously. At this time, the inclined surface of the inclined plate 315 will force the rotating rod 2 316 and the sliding baffle 2 223 to slide upward synchronously, so that the through hole 1 224 coincides with the through hole 2 225, and the L-shaped plate 314 drives the sliding baffle 1 312 to move synchronously, so that the through hole 313 coincides with the transmission square tube 311, so that the hydraulic oil can circulate.

[0030] The positioning assembly 32 includes a flow square tube 325 connected to the bottom of the second telescopic tube 321. The end of the flow square tube 325 away from the second telescopic tube 321 is connected to the pressure piston tube 323. The output end of the pressure piston tube 323 is fixedly connected to the third contact arc plate 324. When the transmission pipe 215 presses the large pipe, the large pipe will contact the outer wall of the contact arc plate 324, and force the hydraulic oil inside the pressurized piston pipe 323 to be transmitted to the inner wall of the telescopic pipe 2 321 through the flow square pipe 325; After the clamping is completed using the above-mentioned equipment, the roller 124 is in contact with the pipe. When the worker completes the single-sided welding, the worker can rotate the pipe so that the unwelded side of the pipe faces the working area, ensuring that after the equipment completes the single-sided welding, the remaining positions can be welded without removing the clamp.

[0031] A specific application of this embodiment is: before use, the device is placed between two pipes to be welded, ensuring that the pipe diameter between the upper interlayer 14 is smaller, while the pipe diameter inside the lower interlayer 15 is larger; When clamping, the worker first presses the rotating rod 111 to force the rotating rod 111 to rotate. At this time, the outer wall of the rotating rod 111 will contact the outer wall of the limiting rod 112. The compression force of the rotating rod 111 will be transmitted to the upper interlayer 14 and the lower interlayer 15 through the limiting rod 112, forcing the upper interlayer 14 and the lower interlayer 15 to open outward, and the torsion spring between the upper interlayer 14 and the lower interlayer 15 will continue to generate potential energy. Then the worker releases the pressing palm, and the torsion spring will drive the upper interlayer 14 and the lower interlayer 15 to clamp the pipe. Taking advantage of the fact that most pipes are round, a clamping assembly 12 and a pressure assembly 21 are provided inside the device. When the end of the transmission pipe 215 contacts the outer wall of the large pipe, the transmission pipe 215 will be pressed and move along the inner wall of the sliding pipe 213 toward the direction of the limit assembly 22. At this time, the hydraulic oil inside the transmission pipe 215 will be transmitted to the inside of the transmission square pipe 311 through the hose 216, and finally enter the inside of the telescopic pipe 122, forcing the telescopic pipe 122 to extend, forcing the telescopic pipe 122 to drive the transmission pipe 215 to move along the inner wall of the sliding pipe 213. The contact block 123 and the roller 124 are in contact with the outer wall of the small pipe. Since the upper interlayer 14 and the lower interlayer 15 expand and contract synchronously, the clamping centers of the two are equal. When the transmission pipe 215 is compressed and contracted, the corresponding telescopic tube 122 will also extend. The transmission pipe 215 will force the center of the large pipe to coincide with the center of the lower interlayer 15, while the roller 124 will force the center of the small pipe to coincide with the center of the upper interlayer 14. Through the use of these components, the device can quickly locate the centers of pipes of different sizes. Utilizing the characteristic that the piston plate 214 slides along the outer wall of the sliding tube 213, the side wall of the single hydraulic box 211 will be connected through two through tubes 212. When the piston plate 214 slides along the inner wall of the sliding tube 213, if the outer wall of the contact block 123 has come into contact with the outer wall of the small pipe, the pressure force on the transmission pipe 215 will force the sliding tube 213 to slide along the inner wall of the through tube 212, and transmit the hydraulic oil inside the through tube 212 to the inside of the hydraulic box 211, forcing another group of pressure components 21 to extend. Through the above design, multiple pressure components 21 can clamp the outer wall of the pipe at the same time, ensuring the stability of the pressure clamping while ensuring that the equipment can adapt to pipes of different diameters.

[0032] Utilizing the characteristic that the rotating rod 111 first rotates when subjected to external pressure, and then contacts the outer wall of the limiting rod 112, forcing the upper interlayer 14 and the lower interlayer 15 to rotate, a linkage assembly 31 is provided inside the device, wherein when the rotating rod 111 rotates outward, the torsion spring 113 rotates and drives the inclined plate 315 to move synchronously through the rotating rod 317, thereby driving the inclined plate 315 and the L-shaped plate 314 to move outward synchronously. At this time, the inclined surface of the inclined plate 315 forces the rotating rod 2 316 and the sliding baffle 223 to slide upward synchronously, so that the through hole 1 224 coincides with the through hole 2 225, and the L-shaped plate 314 drives the sliding baffle 1 312 to move synchronously, so that the through hole 313 coincides with the transmission square tube 311, so that the hydraulic oil can circulate; After the device completes clamping, the torsion spring 113 will release the mechanical power, forcing the rotating rod 111 to reset, and the rotating rod 111 will drive the L-shaped plate 314 to reset. In this process, the through hole 313 will be completely dislocated with the inner wall of the transmission square tube 311, and the sliding baffle 223 will be pulled by the spring 226, so that the through hole 1 224 and the through hole 2 225 are completely dislocated. Through the application of the above components, the hydraulic oil inside the device can no longer flow. At this time, the hydraulic oil inside the transmission pipe 215, the hydraulic oil inside the through pipe 212 and the hydraulic oil inside the telescopic tube 122 are all in the sealed space. Through the application of the above components, it is ensured that after the device completes clamping, the thrust generated by the external welding will not cause the pipeline to deviate.

[0033] After the clamping is completed using the above-mentioned equipment, the roller 124 is in contact with the pipe. When the worker completes the single-sided welding, the worker can rotate the pipe so that the unwelded side of the pipe faces the working area, ensuring that after the equipment completes the single-sided welding, the remaining positions can be welded without removing the clamp.

[0034] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A welding fixture for producing and processing metal parts, comprising a cylinder (13), wherein the outer wall of the cylinder (13) is rotatably connected to two upper interlayers (14), and the bottom of the outer wall of the cylinder (13) is rotatably connected to two lower interlayers (15), characterized in that: Also includes: A limiting mechanism (1), wherein the limiting mechanism (1) is rotatably connected to the outer wall of the lower interlayer (15), and drives the upper interlayer (14) and the lower interlayer (15) to open outward; A clamping mechanism (2), wherein the clamping mechanism (2) is fixedly connected to the inner wall of the upper interlayer (14), and when the upper interlayer (14) drives the clamping mechanism (2) to squeeze the metal round tube, the round tube will approach the center position of the upper interlayer (14) and the lower interlayer (15); A limiting mechanism (3), the limiting mechanism (3) is fixedly connected to the side wall of the clamping mechanism (2) and is used to position and clamp the round tube; Before use, the device is placed between two pipes to be welded, ensuring that the pipe diameter between the upper interlayer (14) is smaller and the pipe diameter inside the lower interlayer (15) is larger.

2. A welding fixture for producing and processing metal parts according to claim 1, characterized in that: The limiting mechanism (1) comprises: A pressing assembly (11), the pressing assembly (11) being rotatably connected to the bottom of the upper interlayer (14) via a handle; The handle comprises a rotating rod (111) rotatably connected to the bottom of the upper interlayer (14), a limiting rod (112) fixedly connected to the outer wall of the upper interlayer (14), and an end of the limiting rod (112) away from the upper interlayer (14) is fixedly connected to the bottom of the lower interlayer (15); A clamping assembly (12), wherein the clamping assembly (12) is fixedly connected to the inner wall of the upper interlayer (14) via a contact member; The contact member comprises a hydraulic box (121) fixedly connected to the inner wall of the upper interlayer (14), and two telescopic tubes (122) are connected through the side wall of the hydraulic box (121); When the clamping mechanism (2) contacts the outer wall of the circular tube with a larger diameter, the hydraulic oil inside the clamping mechanism (2) will enter the interior of the telescopic tube (122) and clamp the tube with a smaller diameter.

3. The welding fixture for producing and processing metal parts according to claim 2, characterized in that: The clamping mechanism (2) comprises: A pressure component (21), wherein the pressure component (21) is fixedly connected to the inner wall of the lower interlayer (15) via a pressure piece; The pressure member comprises a second hydraulic box (211) fixedly connected to the inner wall of the lower interlayer (15); a through-tube (212) is connected to the inner wall of the second hydraulic box (211); a sliding tube (213) is slidably connected to the inner wall of the through-tube (212); a piston plate (214) is slidably connected to the inner wall of the sliding tube (213); and a transmission tube (215) is connected to the side wall of the piston plate (214); A limiting assembly (22), the limiting assembly (22) being fixedly connected to the inner wall of the through-tube (212) via a blocking member; The blocking member comprises a partition (221) fixedly connected to the inner wall of the through-tube (212); a second sliding baffle (223) is slidably connected to the inner wall of the partition (221); a first through hole (224) is provided on the side wall of the second sliding baffle (223); and a second through hole (225) is provided on the side wall of the partition (221); When the device clamps the pipeline, the transmission tube (215) will first contact the outer wall of the large pipeline and squeeze the hydraulic oil inside the sliding tube (213) into the inner wall of the telescopic tube (122), causing the telescopic tube (122) to extend.

4. The welding fixture for producing and processing metal parts according to claim 3, characterized in that: The limiting mechanism (3) comprises: A linkage assembly (31), wherein the linkage assembly (31) is fixedly connected to the top of the lower interlayer (15) via a flow member; The flow element comprises a transmission square tube (311) fixedly connected to the top of the lower interlayer (15), one end of the transmission square tube (311) away from the lower interlayer (15) is connected to the side wall of the telescopic tube (122), the inner wall of the transmission square tube (311) is slidably connected to a sliding baffle (312), and the outer wall of the sliding baffle (312) is provided with a through hole (313); A positioning assembly (32), wherein the positioning assembly (32) is fixedly connected to the outer wall of the cylinder (13) via a limiting member; The limiting member comprises a second telescopic tube (321) fixedly connected to the outer wall of the cylinder (13), and one end of the second telescopic tube (321) away from the cylinder (13) is fixedly connected to a second contact arc plate (322); When the rotating rod 1 (111) is moved outward by the extrusion force, the rotating rod 1 (111) drives the sliding baffle 1 (312) to slide along the inner wall of the transmission square tube (311) through the linkage assembly (31). At this time, the through hole 3 (313) will form a flow gap with the inner wall of the transmission square tube (311), so that the hydraulic oil of the transmission tube (215) can flow to the telescopic tube 1 (122) through the transmission square tube (311).

5. The welding fixture for producing and processing metal parts according to claim 4, characterized in that: The pressing assembly (11) includes a torsion spring (113) fixedly connected to the inner wall of the rotating rod (111), and the other end of the torsion spring (113) is fixedly connected to the outer wall of the lower interlayer (15); When clamping, the worker presses the rotating rod 1 (111) at both ends to force the rotating rod 1 (111) to rotate. At this time, the outer wall of the rotating rod 1 (111) will contact the outer wall of the limiting rod (112), and the compression force of the rotating rod 1 (111) will be transmitted to the upper interlayer (14) and the lower interlayer (15) through the limiting rod (112), forcing the upper interlayer (14) and the lower interlayer (15) to open outward, and the torsion spring between the upper interlayer (14) and the lower interlayer (15) will continue to have potential energy.

6. The welding fixture for producing and processing metal parts according to claim 5, characterized in that: The clamping assembly (12) includes a contact block (123) fixedly connected to an end of the telescopic tube (122) away from the hydraulic box (121), and a roller (124) is rotatably connected to the side wall of the contact block (123); When the telescopic tube (122) is extended outward, the roller (124) will contact the outer wall of the small pipe. The contact of the two sets of contact blocks (123) will force the pipe to approach the clamping center point of the upper interlayer (14) and the lower interlayer (15), so that after the small pipe is clamped, it is at the clamping center position of the upper interlayer (14); the end of the transmission pipe (215) also has a roller (124).

7. The welding fixture for producing and processing metal parts according to claim 6, characterized in that: The pressure component (21) includes a hose (216) connected to the outer wall of the transmission pipe (215); When the end of the transmission tube (215) contacts the outer wall of the large pipe, the transmission tube (215) will be pressed and move along the inner wall of the sliding tube (213) toward the limit assembly (22). At this time, the hydraulic oil inside the transmission tube (215) will be transmitted to the inside of the transmission square tube (311) through the hose (216), and finally enter the inside of the telescopic tube (122), forcing the telescopic tube (122) to extend.

8. The welding fixture for producing and processing metal parts according to claim 7, characterized in that: The limiting assembly (22) includes a spring 1 (222) fixedly connected to the side wall of the partition (221), an end of the spring 1 (222) away from the partition (221) is fixedly connected to the side wall of the sliding tube (213), and the bottom of the sliding baffle 2 (223) is fixedly connected to the spring 2 (226); In the process of the piston plate (214) sliding along the inner wall of the sliding tube (213), if the outer wall of the contact block (123) has come into contact with the outer wall of the small pipe, the pressure force will force the sliding tube (213) to slide along the inner wall of the through tube (212), and transmit the hydraulic oil inside the through tube (212) to the inside of the hydraulic box (211), forcing the other set of pressure components (21) to extend.

9. The welding fixture for producing and processing metal parts according to claim 8, characterized in that: The linkage assembly (31) includes an L-shaped plate (314) fixedly connected to the side wall of the sliding baffle plate 1 (312), an inclined panel (315) fixedly connected to the side wall of the L-shaped plate (314), a rotating rod 2 (316) slidably connected to the inner wall of the sliding baffle plate 2 (223), a rotating rod 3 (317) rotatably connected to the side wall of the inclined panel (315), and an end of the rotating rod 3 (317) away from the inclined panel (315) is rotatably connected to the side wall of the rotating rod 1 (111); When the rotating rod 1 (111) rotates outward, it will drive the inclined plate (315) and the L-shaped plate (314) to move outward synchronously. At this time, the inclined surface of the inclined plate (315) will force the rotating rod 2 (316) and the sliding baffle 2 (223) to slide upward synchronously, so that the through hole 1 (224) and the through hole 2 (225) coincide with each other, and the L-shaped plate (314) drives the sliding baffle 1 (312) to move synchronously, so that the through hole 3 (313) and the transmission square tube (311) coincide with each other, so that the hydraulic oil can circulate.

10. The welding fixture for producing and processing metal parts according to claim 9, characterized in that: The positioning assembly (32) includes a flow square tube (325) connected to the bottom of the second telescopic tube (321), an end of the flow square tube (325) away from the second telescopic tube (321) is connected to the pressure piston tube (323), and the output end of the pressure piston tube (323) is fixedly connected to the third contact arc plate (324); When the transmission pipe (215) compresses the large pipe, the large pipe will contact the outer wall of the contact arc plate three (324), and force the hydraulic oil inside the pressurized piston pipe (323) to be transmitted to the inner wall of the telescopic pipe two (321) through the flow square pipe (325).

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