Plasma welding equipment for copper tubes

Abstract

The invention relates to the technical field of welding equipment, and in particular to a plasma welding equipment for copper pipes, comprising a mechanical arm and a plasma welding gun; further comprising a frame, a bracket 1, a bracket 2, a clamping frame 1, a clamping frame 2, a motor, an inner shaft, an outer shaft, a slide assembly and a clamping assembly, wherein the bracket 1 and the bracket 2 are mounted on the left part of the frame, the lower ends of the clamping frame 1 and the clamping frame 2 are respectively rotatably mounted on the left part of the frame, the slide assembly is mounted on the frame, the motor is mounted on the slide assembly, the right end of the inner shaft is rotatably mounted on the slide assembly, the inner shaft is drivingly connected to the output shaft of the motor, the outer shaft is telescopically sleeved on the left part of the inner shaft, the clamping assembly is installed between the left end of the inner shaft and the left end of the outer shaft, the clamping assembly aligns and clamps the butt joints of two copper pipes from the inside, and the plasma welding gun is aligned with the butt joints of the two copper pipes; it concentrically aligns and clamps the copper pipes from the inside, reduces the stress during copper pipe welding, and improves welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to plasma welding equipment for copper pipes. Background Art

[0002] Plasma welding is a welding method that uses a plasma arc as a heat source to melt the joints of two metals. The Chinese invention patent with the prior art publication number CN107639331B proposes an all-position plasma welding system, which is provided with a gas protection device on the welding carriage system. When welding, the gas protection device moves with the welding carriage system and performs gas protection on the welding position at any time. This working method has high working efficiency, good weld quality, high welding stability and reliability, strong versatility and high welding stability; when welding, the gas protection device moves with the welding carriage system and performs gas protection on the welding position at any time. This working method has high working efficiency, good weld quality, high welding stability and reliability, high degree of automation, strong versatility and high welding stability. The equipment structure is compact and easy to miniaturize the whole machine; it can realize the welding of titanium alloys, nickel alloys and dissimilar metal pipelines, and can also realize other non-pipeline welding.

[0003] However, the above-mentioned prior art does not disclose the alignment structure when two copper tubes are welded, and the clamping device and the welding carriage system are directly clamped on the copper tube, so that the welding part of the copper tube is subjected to a large gravity, and as the welding carriage system moves, the center and direction of the gravity on the welding part of the copper tube will also change, resulting in displacement or deformation of the welding part of the copper tube during welding, resulting in a decrease in welding quality. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a plasma welding device for copper tubes, which can concentrically align and clamp the copper tubes from the inside, reduce the force on the copper tubes during welding, and improve the welding quality.

[0005] The plasma welding equipment of the present invention comprises a mechanical arm and a plasma welding gun, wherein the plasma welding gun is mounted on the mechanical arm; the equipment also comprises a frame, a bracket 1, a bracket 2, a pressing frame 1, a pressing frame 2, a motor, an inner shaft, an outer shaft, a slide assembly and a clamping assembly, wherein the bracket 1 and the bracket 2 are mounted on the left part of the frame, a plurality of rollers are rotatably mounted on the bracket 1 and the bracket 2, the lower ends of the pressing frame 1 and the pressing frame 2 are respectively rotatably mounted on the left part of the frame, a plurality of pressing rollers are mounted on the pressing frame 1 and the pressing frame 2, and the pressing rollers on the pressing frame 1 are The roller is arranged opposite to the roller on the bracket one, the pressure roller on the pressing frame two is arranged opposite to the roller on the bracket two, the slide assembly is installed on the frame, the motor is installed on the slide assembly, the right end of the inner shaft is rotatably installed on the slide assembly, the inner shaft is connected to the output shaft of the motor, the outer shaft is telescopically sleeved on the left part of the inner shaft, the left parts of the inner shaft and the outer shaft extend into the copper tube, and a clamping assembly is installed between the left end of the inner shaft and the left end of the outer shaft, and the clamping assembly is synchronously opened when the inner shaft and the outer shaft are relatively telescopic to align the butt joints of the two copper tubes from the inside. Align and clamp and tighten, align the plasma welding gun with the butt joint of the two copper tubes; when working, place copper tube one on multiple rollers of bracket one, place copper tube two on multiple rollers of bracket two, and butt the opposite ends of copper tube one and copper tube two, tilt the pressing frame one and the pressing frame two, so that the multiple pressing rollers of the pressing frame one are pressed tightly on copper tube one, and the multiple pressing rollers of the pressing frame two are pressed tightly on copper tube two, and the slide assembly moves to the left, so that the left ends of the inner shaft and the outer shaft are inserted into copper tube one and reach the connecting part of copper tube one and copper tube two, and operate The clamping assembly is opened so that the clamping assembly can align copper tube one and copper tube two concentrically and clamp them tightly from the inside, the motor drives the inner shaft and the outer shaft to rotate slowly, and at the same time the plasma welding gun emits a plasma arc to perform annular comprehensive welding on the connection part of copper tube one and copper tube two, with high working efficiency. Compared with the prior art, the clamping assembly has the function of concentrically aligning and clamping the copper tube from the inside, and the plasma welding gun is suspended above the copper tube by a mechanical arm, which reduces the force on the copper tube during welding, avoids displacement or deformation of the welding part of the copper tube during welding, and improves the welding quality.

[0006] Preferably, it includes a push cylinder 1 and a pull rod 1, one end of the push cylinder 1 is rotatably connected to the frame, the other end of the push cylinder 1 is rotatably connected to the middle part of the clamping frame 2, one end of the pull rod 1 is rotatably connected to the middle part of the clamping frame 1, and the other end of the pull rod 1 is rotatably connected to the middle part of the clamping frame 2; when the push cylinder 1 is extended or shortened, it drives the clamping frame 2 to swing, and when the clamping frame 2 swings, the pull rod 1 pulls the clamping frame 1 to swing synchronously, so that the clamping frame 1 and the clamping frame 2 swing synchronously, so that the multiple pressure rollers of the clamping frame 1 and the multiple pressure rollers of the clamping frame 2 can synchronously press or release the copper tube 1 and the copper tube 2, which has good practicality.

[0007] Preferably, it also includes a push plate and a pull rod 2, the middle part of the push plate is rotatably connected to the frame, the push plate is located at the left end of the frame, the lower end of the push plate is rotatably connected to the left end of the pull rod 2, and the right end of the pull rod 2 is rotatably connected to the middle part of the clamping frame 2; when the copper tube 1 and the copper tube 2 are placed on the bracket 1 and the bracket 2 respectively, the push cylinder 1 drives the clamping frame 2 to swing to the left, so that the clamping frame 2 pushes the lower end of the push plate to the left through the pull rod 2, so that the upper end of the push plate swings, so that the push plate pushes the copper tube 2 toward the copper tube 1, so that the copper tube 2 and the copper tube 1 are connected, which has good practicality.

[0008] Preferably, it also includes a push cylinder 2 and a beveling cutter, the push cylinder 2 is installed on the frame, the beveling cutter is installed on the piston rod of the push cylinder 2, and the beveling cutter is located below the plasma welding gun; after the copper tube 1 and the copper tube 2 are clamped and fixed, the piston rod of the push cylinder 2 is extended so that the beveling cutter can bevel the connection part of the copper tube 1 and the copper tube 2, thereby improving the welding quality.

[0009] Preferably, it also includes a collecting basket, a solder conveying box, a funnel, two crushing rollers, two wheel discs and multiple stirring rods, the collecting basket is installed on the push cylinder 2, the solder conveying box is installed on the plasma welding gun, the funnel is installed on the feeding port of the solder conveying box, the discharge port of the solder conveying box is connected to the feeding port of the plasma welding gun through a pipeline, the two crushing rollers are rotatably installed in the solder conveying box, the two wheel discs are rotatably installed in the solder conveying box, the two wheel discs are located below the two crushing rollers, and multiple stirring rods are installed on the two wheel discs; the collecting basket collects the copper chips cut by the beveling knife, and adds the copper chips and solder into the solder conveying box through the funnel, the two crushing rollers rotate to crush the copper chips, the two wheel discs drive the multiple stirring rods to rotate to stir the copper chip powder and the solder, the mixed solder is input into the plasma welding gun through the pipeline, the mixed solder melts under the action of the high-temperature plasma beam to weld the connecting part of the copper tube 1 and the copper tube 2, so as to realize the recycling of the copper chips.

[0010] Preferably, the robotic arm includes a slide table, a sliding seat, a lifting rod and a cross beam, the slide table is installed on the outside of the frame, the sliding seat is slidably installed on the slide table, the lower end of the lifting rod is installed on the sliding seat, one end of the cross beam is rotatably installed on the upper end of the lifting rod, the plasma welding gun is installed on the other end of the cross beam, and the solder conveying box is installed on the cross beam; the sliding seat slides on the slide table to adjust the distance between the lifting rod and the frame, the lifting rod is telescoped to adjust the height of the cross beam, and the cross beam is rotated to adjust the position of the plasma welding gun, so that the plasma welding gun can flexibly adjust the position and height to adapt to copper pipes of different diameters, with good versatility.

[0011] Preferably, it also includes a rotary joint and multiple spray holes. The inner shaft is tubular, and the rotary joint is installed on the right end of the inner shaft. The output end of the rotary joint is connected to the inside of the inner shaft. Multiple spray holes are arranged on the outer wall of the left end of the inner shaft, and the multiple spray holes are located on the outer side of the left end of the outer shaft; the input end of the rotary joint is connected to an external coolant system. After the welding of copper tube 1 and copper tube 2 is completed, the coolant is input into the inner shaft through the rotary joint and sprayed to the connection part of copper tube 1 and copper tube 2 through the multiple spray holes, so that the coolant cools the connection part of copper tube 1 and copper tube 2, thereby improving the welding quality.

[0012] Preferably, the slide assembly includes a mounting seat, a push cylinder three, a slide two and two optical rails, the mounting seat is installed on the right end of the frame, the fixed end of the push cylinder three is installed on the mounting seat, the piston rod of the push cylinder three is connected to the slide two, the right ends of the two optical rails are connected to the slide two, the two slides two are slidably connected to the mounting seat, the motor is installed on the slide two, and the inner shaft is rotatably installed on the slide two; the piston rod of the push cylinder three is extended to push the slide two to move to the right, the slide two drives the two optical rails to move to the right, the two optical rails and the mounting seat sliding limiter provide auxiliary support for the slide two, and the movement of the slide two is flexible and stable.

[0013] Preferably, the clamping assembly includes a disc 1, a plurality of push blocks 1, a disc 2, a plurality of push blocks 2, a plurality of push rods 1, a plurality of push rods 2 and a push cylinder 4, the disc is concentrically mounted on the left end of the inner shaft, a plurality of inclined grooves 1 are circumferentially arranged on the right end surface of the disc 1, a plurality of push blocks 1 are respectively slidably mounted in the plurality of inclined grooves 1 of the disc 1, the disc 2 is concentrically mounted on the left end of the outer shaft, a plurality of inclined grooves 2 are circumferentially arranged on the left end surface of the disc 2, a plurality of push blocks 2 are respectively slidably mounted in the plurality of inclined grooves 2 of the disc 2, the left ends of the plurality of push rods 1 are rotatably connected to the disc 1, the right ends of the plurality of push rods 1 are respectively rotatably connected to the plurality of push blocks 2, the right ends of the plurality of push rods 2 are rotatably connected to the disc 2, and the left ends of the plurality of push rods 2 They are respectively rotatably connected with multiple push blocks one, one end of push cylinder four is connected to the right end of the inner shaft, and the other end of push cylinder four is connected to the right end of the outer shaft; push cylinder four is extended to make the outer shaft move left, so that the left end of the outer shaft is close to the left end of the inner shaft, so that disc two pushes multiple push blocks one toward the outside of disc one through multiple push rods two, and at the same time, disc one pushes multiple push blocks two toward the outside of disc two through multiple push rods one, so that multiple push blocks one and multiple push blocks two are respectively pressed against the inner walls of copper tube two and copper tube one, realizing concentric alignment and clamping and fixing of copper tube one and copper tube two. Similarly, the contraction of push cylinder four can make multiple push blocks one and multiple push blocks two contract inward to release copper tube one and copper tube two. The structure is simple and practical.

[0014] Preferably, the clamping assembly comprises a disc three, a plurality of push blocks three, a disc four, a plurality of push blocks four, a plurality of push rods three, a plurality of push rods four and a push cylinder five, the disc three is concentrically mounted on the left end of the inner shaft, a plurality of slide grooves three are circumferentially arranged on the right end surface of the disc three, the plurality of push blocks three are respectively slidably mounted in the plurality of slide grooves three of the disc three, the inner ends of the plurality of push blocks three are all provided with an inclined surface one, the disc four is concentrically mounted on the left end of the outer shaft, a plurality of slide grooves four are circumferentially arranged on the left end surface of the disc four, the plurality of push blocks four are respectively slidably mounted in the plurality of slide grooves four of the disc four, the inner ends of the plurality of push blocks four are all provided with an inclined surface two, the left ends of the plurality of push rods three are mounted on the disc three, the right ends of the plurality of push rods three are each provided with an inclined surface three matching the inclined surface two of the push block four, the plurality of push rods three are respectively aligned with the inner ends of the plurality of push blocks four, the right ends of the plurality of push rods four are mounted on the disc four, and the left ends of the plurality of push rods four are each provided with an inclined surface matching the inner end of the push block three The inclined surface four of multiple push rods four are respectively aligned with the inner ends of multiple push blocks three, one end of the push cylinder five is connected to the right end of the inner shaft, and the other end of the push cylinder five is connected to the right end of the outer shaft; the push cylinder five is extended to make the outer shaft move leftward, so that the left end of the outer shaft is close to the left end of the inner shaft, so that the disc four approaches the push block three, so that the inclined surfaces four of multiple push rods four are respectively squeezed and approached with the inclined surfaces one of multiple push blocks three, so that the multiple push blocks three are pushed toward the outside of the disc three, and at the same time, the inclined surfaces three of multiple push rods three are respectively squeezed and approached with the inclined surfaces two of multiple push blocks four, so that the multiple push blocks four are pushed toward the outside of the disc four, so that the multiple push blocks three and the multiple push blocks four are respectively pressed on the inner walls of the copper tube two and the copper tube one, so as to realize the concentric alignment and clamping and fixing of the copper tube one and the copper tube two. Similarly, the contraction of the push cylinder five can make the multiple push blocks three and the multiple push blocks four contract inward to release the copper tube one and the copper tube two, which has a simple structure and good practicality.

[0015] Compared with the prior art, the present invention has the following beneficial effects: it has a clamping assembly for concentrically aligning and clamping the copper tube from the inside, and the plasma welding gun is suspended above the copper tube by a mechanical arm, which reduces the force applied to the copper tube during welding, avoids displacement or deformation of the welding part of the copper tube during welding, and improves the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 is a front schematic view of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the welded copper tube state of the present invention;

[0019] Figure 4 It is a structural schematic diagram of a frame, a bracket 1, a bracket 2, a pressing frame 1 and a pressing frame 2;

[0020] Figure 5It is a schematic diagram of the structure of the robot arm, plasma welding gun, push cylinder 2, beveling cutter, collection basket and solder conveying box;

[0021] Figure 6 It is a schematic diagram of the structure of the crushing roller, the wheel disc and the stirring rod;

[0022] Figure 7 It is a schematic diagram of the structure of the motor, the inner shaft, the outer shaft and the first clamping assembly;

[0023] Figure 8 is a schematic structural diagram of the first clamping assembly in an exploded state;

[0024] Fig. 9 It is a schematic diagram of the structure of the inner shaft, the outer shaft and the second clamping assembly;

[0025] Fig.10 It is a schematic structural diagram of the exploded state of the second clamping assembly.

[0026] Markings in the attached drawings: 1, mechanical arm; 2, plasma welding gun; 3, frame; 4, bracket 1; 5, bracket 2; 6, clamping frame 1; 7, clamping frame 2; 8, motor; 9, inner shaft; 10, outer shaft; 11, push cylinder 1; 12, pull rod 1; 13, push plate; 14, pull rod 2; 15, push cylinder 2; 16, bevel knife; 17, collection basket; 18, solder conveying box; 19, funnel; 20, crushing roller; 21, wheel; 22, stirring rod; 23, slide 1; 2 4. Sliding seat; 25. Lifting rod; 26. Crossbeam; 27. Rotary joint; 28. Spray hole; 29. ​​Mounting seat; 30. Push cylinder three; 31. Slide two; 32. Optical track; 33. Disc one; 34. Push block one; 35. Disc two; 36. Push block two; 37. Push rod one; 38. Push rod two; 39. Push cylinder four; 40. Disc three; 41. Push block three; 42. Disc four; 43. Push block four; 44. Push rod three; 45. Push rod four; 46. Push cylinder five. DETAILED DESCRIPTION

[0027] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Example 1

[0028] like Figures 1 to 4 , Figure 7 and Figure 8As shown, a plasma welding device for copper tubes includes a robot arm 1 and a plasma welding gun 2, wherein the plasma welding gun 2 is mounted on the robot arm 1; and further includes a frame 3, a bracket 1 4, a bracket 2 5, a pressing frame 1 6, a pressing frame 2 7, a motor 8, an inner shaft 9, an outer shaft 10, a slide assembly and a clamping assembly, wherein the bracket 1 4 and the bracket 2 5 are mounted on the left side of the frame 3, and a plurality of rollers are rotatably mounted on the bracket 1 4 and the bracket 2 5, and the lower ends of the pressing frame 1 6 and the pressing frame 2 7 are rotatably mounted on the left side of the frame 3, and a plurality of pressure rollers are mounted on the pressure frame 1 6 and the pressure frame 2 7, and the pressure rollers on the pressure frame 1 6 are arranged opposite to the rollers on the bracket 1 4, and the pressure rollers on the pressing frame 2 7 are arranged opposite to the rollers on the bracket 2 5. The slide assembly is installed on the frame 3, the motor 8 is installed on the slide assembly, the right end of the inner shaft 9 is rotatably installed on the slide assembly, the inner shaft 9 is connected to the output shaft of the motor 8, the outer shaft 10 is telescopically sleeved on the left part of the inner shaft 9, the inner shaft 9 and the left part of the outer shaft 10 extend into the copper tube, and a clamping assembly is installed between the left end of the inner shaft 9 and the left end of the outer shaft 10. The clamping assembly is synchronously opened when the inner shaft 9 and the outer shaft 10 are relatively telescopic, and the butt joints of the two copper tubes are aligned and clamped and tightened from the inside, and the plasma welding gun 2 is aligned with the butt joints of the two copper tubes; it includes a push cylinder 11 and a pull rod 12, one end of the push cylinder 11 is rotatably connected to the frame 3, and the other end of the push cylinder 11 is rotatably connected to the middle part of the clamping frame 27. Dynamic connection, one end of the pull rod 12 is rotatably connected to the middle part of the clamping frame 16, and the other end of the pull rod 12 is rotatably connected to the middle part of the clamping frame 27; it also includes a push plate 13 and a pull rod 2 14, the middle part of the push plate 13 is rotatably connected to the frame 3, the push plate 13 is located at the left end of the frame 3, the lower end of the push plate 13 is rotatably connected to the left end of the pull rod 2 14, and the right end of the pull rod 2 14 is rotatably connected to the middle part of the clamping frame 27; the clamping assembly includes a disc 1 33, multiple push blocks 1 34, a disc 2 35, multiple push blocks 2 36, multiple push rods 1 37, multiple push rods 2 38 and a push cylinder 4 39, the disc 1 33 is concentrically installed on the left end of the inner shaft 9, and multiple inclined grooves are circumferentially arranged on the right end surface of the disc 1 33 1. Multiple push blocks 34 are respectively slidably installed in multiple inclined grooves 1 of disc 1 33, disc 2 35 is concentrically installed on the left end of the outer shaft 10, multiple inclined grooves 2 are circumferentially arranged on the left end surface of disc 2 35, multiple push blocks 2 36 are respectively slidably installed in multiple inclined grooves 2 of disc 2 35, the left ends of multiple push rods 1 37 are rotatably connected to disc 1 33, the right ends of multiple push rods 1 37 are respectively rotatably connected to multiple push blocks 2 36, the right ends of multiple push rods 2 38 are rotatably connected to disc 2 35, the left ends of multiple push rods 2 38 are respectively rotatably connected to multiple push blocks 1 34, one end of push cylinder 4 39 is connected to the right end of inner shaft 9, and the other end of push cylinder 4 39 is connected to the right end of outer shaft 10.

[0029] During operation, copper tube 1 is placed on multiple rollers of bracket 1 4, copper tube 2 is placed on multiple rollers of bracket 2 5, and push cylinder 1 11 drives pressing frame 2 7 to swing to the left, so that pressing frame 2 7 pushes the lower end of push plate 13 to the left through pull rod 2 14, so that the upper end of push plate 13 swings to the left, so that push plate 13 pushes copper tube 2 to copper tube 1, so that copper tube 2 and copper tube 1 are connected, and push cylinder 1 11 drives pressing frame 2 7 to swing to the right, and pressing frame 2 7 is pulled by pull rod 12 while swinging. The clamping frame 1 6 swings synchronously, so that the clamping frame 1 6 and the clamping frame 2 7 swing synchronously, so that the multiple pressure rollers of the clamping frame 1 6 and the multiple pressure rollers of the clamping frame 2 7 press the copper tube 1 and the copper tube 2 synchronously, so that the multiple pressure rollers of the clamping frame 1 6 are pressed on the copper tube 1, and the multiple pressure rollers of the clamping frame 2 7 are pressed on the copper tube 2. The slide assembly moves to the left, so that the left ends of the inner shaft 9 and the outer shaft 10 are inserted into the copper tube 1 and reach the connection part of the copper tube 1 and the copper tube 2, and the push cylinder 4 39 is extended to make the outer shaft 10 move to the left , so that the left end of the outer shaft 10 is close to the left end of the inner shaft 9, so that the disc 2 35 pushes the multiple push blocks 1 34 to the outside of the disc 1 33 through the multiple push rods 2 38, and at the same time, the disc 1 33 pushes the multiple push blocks 2 36 to the outside of the disc 2 35 through the multiple push rods 1 37, so that the multiple push blocks 1 34 and the multiple push blocks 2 36 are respectively pressed against the inner walls of the copper tube 2 and the copper tube 1, so as to realize the concentric alignment and clamping fixation of the copper tube 1 and the copper tube 2, and the motor 8 drives the inner shaft 9 and the outer shaft 10 to rotate slowly, and at the same time At the same time, the plasma welding gun 2 emits a plasma arc to perform annular full welding on the connection part of the copper tube 1 and the copper tube 2. After the welding is completed, the push cylinder 4 39 contracts to make the multiple push blocks 1 34 and the multiple push blocks 2 36 contract inward to release the copper tube 1 and the copper tube 2. The working efficiency is high. Compared with the prior art, the plasma welding gun is suspended above the copper tube by the mechanical arm 1, which reduces the force on the copper tube during welding, avoids displacement or deformation of the welding part of the copper tube during welding, and improves the welding quality. Example 2

[0030] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, on the basis of Example 1, it also includes a push cylinder 15 and a bevel cutter 16, the push cylinder 15 is installed on the frame 3, the bevel cutter 16 is installed on the piston rod of the push cylinder 15, and the bevel cutter 16 is located below the plasma welding gun 2; it also includes a collecting basket 17, a solder conveying box 18, a funnel 19, two crushing rollers 20, two wheel discs 21 and a plurality of stirring rods 22, the collecting basket 17 is installed on the push cylinder 15, the solder conveying box 18 is installed on the plasma welding gun 2, the funnel 19 is installed on the feed port of the solder conveying box 18, the discharge port of the solder conveying box 18 is connected to the feed port of the plasma welding gun 2 through a pipeline, the two crushing rollers 20 are rotatably installed in the solder conveying box 18, the two wheel discs 21 are rotatably installed in the solder conveying box 18, and the two wheel discs 21 are located at two powder Below the crushing roller 20, multiple stirring rods 22 are installed on the two wheel discs 21; the mechanical arm 1 includes a slide 23, a sliding seat 24, a lifting rod 25 and a crossbeam 26, the slide 23 is installed on the outside of the frame 3, the sliding seat 24 is slidably installed on the slide 23, the lower end of the lifting rod 25 is installed on the sliding seat 24, one end of the crossbeam 26 is rotatably installed on the upper end of the lifting rod 25, the plasma welding gun 2 is installed on the other end of the crossbeam 26, and the solder conveying box 18 is installed on the crossbeam 26; it also includes a rotary joint 27 and multiple spray holes 28, the inner shaft 9 is tubular, the rotary joint 27 is installed on the right end of the inner shaft 9, the output end of the rotary joint 27 is connected to the inside of the inner shaft 9, and the left end outer wall of the inner shaft 9 is provided with multiple spray holes 28, and the multiple spray holes 28 are located on the left end outer side of the outer shaft 10.

[0031] After the copper tube 1 and the copper tube 2 are clamped and fixed, the piston rod of the push cylinder 2 15 is extended so that the groove cutter 16 grooves the connection part of the copper tube 1 and the copper tube 2, and the collecting basket 17 collects the copper chips cut by the groove cutter 16, and the copper chips and solder are added to the solder conveying box 18 through the funnel 19. The two crushing rollers 20 rotate to crush the copper chips, and the two wheel plates 21 drive multiple stirring rods 22 to rotate to stir the copper chip powder and the solder. The mixed solder is input into the plasma welding gun 2 through the pipeline. The mixed solder melts under the action of the high-temperature plasma beam to weld the connection part of the copper tube 1 and the copper tube 2, so as to realize the recycling of the copper chips and smooth the surface of the copper tube. The movable seat 24 slides on the slide 23 to adjust the distance between the lifting rod 25 and the frame 3. The lifting rod 25 is telescopically adjusted to adjust the height of the crossbeam 26. The crossbeam 26 is rotated to adjust the position of the plasma welding gun 2, so that the plasma welding gun 2 can flexibly adjust the position and height to adapt to copper tubes of different diameters. The input end of the rotary joint 27 is connected to an external coolant system. After the welding of the copper tube 1 and the copper tube 2 is completed, the coolant is input into the inner shaft 9 through the rotary joint 27 and sprayed to the connection part of the copper tube 1 and the copper tube 2 through multiple spray holes 28, so that the coolant cools the connection part of the copper tube 1 and the copper tube 2 to improve the welding quality. Example 3

[0032] like Figures 1 to 3, Fig. 9 and Fig.10 As shown, a plasma welding device for copper tubes includes a robot arm 1 and a plasma welding gun 2, wherein the plasma welding gun 2 is mounted on the robot arm 1; and further includes a frame 3, a bracket 1 4, a bracket 2 5, a pressing frame 1 6, a pressing frame 2 7, a motor 8, an inner shaft 9, an outer shaft 10, a slide assembly and a clamping assembly, wherein the bracket 1 4 and the bracket 2 5 are mounted on the left side of the frame 3, and a plurality of rollers are rotatably mounted on the bracket 1 4 and the bracket 2 5, and the lower ends of the pressing frame 1 6 and the pressing frame 2 7 are rotatably mounted on the left side of the frame 3, and a plurality of pressure rollers are mounted on the pressure frame 1 6 and the pressure frame 2 7, and the pressure rollers on the pressure frame 1 6 are arranged opposite to the rollers on the bracket 1 4, and the pressure rollers on the pressing frame 2 7 are arranged opposite to the rollers on the bracket 2 5, and the slide assembly is mounted on the frame 3. The motor 8 is mounted on the slide assembly, the right end of the inner shaft 9 is rotatably mounted on the slide assembly, the inner shaft 9 is drivingly connected to the output shaft of the motor 8, the outer shaft 10 is telescopically sleeved on the left part of the inner shaft 9, the inner shaft 9 and the left part of the outer shaft 10 extend into the copper tube, a clamping assembly is installed between the left end of the inner shaft 9 and the left end of the outer shaft 10, the clamping assembly is synchronously opened when the inner shaft 9 and the outer shaft 10 are relatively telescopic, and the butt joints of the two copper tubes are aligned and clamped and fastened from the inside, and the plasma welding gun 2 is aligned with the butt joints of the two copper tubes; the slide assembly includes a mounting seat 29, a push cylinder three 30, a slide two 31 and two light rails 32, the mounting seat 29 is mounted on the right end of the frame 3, the fixed end of the push cylinder three 30 is mounted on the mounting seat 29, and the movable end of the push cylinder three 30 The plug rod is connected to the slide 2 31, the right ends of the two light rails 32 are connected to the slide 2 31, the two slides 2 31 are slidably connected to the mounting seat 29, the motor 8 is installed on the slide 2 31, and the inner shaft 9 is rotatably installed on the slide 2 31; the clamping assembly includes a disc 3 40, a plurality of push blocks 3 41, a disc 42, a plurality of push blocks 43, a plurality of push rods 3 44, a plurality of push rods 45 and a push cylinder 5 46, the disc 3 40 is concentrically installed on the left end of the inner shaft 9, a plurality of slide grooves 3 are circumferentially arranged on the right end surface of the disc 3 40, a plurality of push blocks 3 41 are respectively slidably installed in the plurality of slide grooves 3 of the disc 3 40, the inner ends of the plurality of push blocks 3 41 are all provided with inclined surfaces 1, the disc 4 42 is concentrically installed on the left end of the outer shaft 10, and the left end of the disc 4 42 A plurality of slide grooves four are arranged on the circumference of the surface, a plurality of push blocks four 43 are respectively slidably installed in the plurality of slide grooves four of the disc four 42, a plurality of push blocks four 43 are respectively provided with inclined surfaces two at their inner ends, a plurality of push rods three 44 are respectively arranged with inclined surfaces three matching the inclined surfaces two of the push blocks four 43 at their right ends, a plurality of push rods three 44 are respectively aligned with the inner ends of a plurality of push blocks four 43, a plurality of push rods four 45 are respectively arranged with their right ends on the disc four 42, a plurality of push rods four 45 are respectively provided with inclined surfaces four matching the inner ends of the push blocks three 41, a plurality of push rods four 45 are respectively aligned with the inner ends of a plurality of push blocks three 41, one end of a push cylinder five 46 is connected to the right end of the inner shaft 9, and the other end of the push cylinder five 46 is connected to the right end of the outer shaft 10.

[0033] The slide assembly moves to the left, so that the left ends of the inner shaft 9 and the outer shaft 10 are inserted into the copper tube 1 and reach the connection part of the copper tube 1 and the copper tube 2, the piston rod of the push cylinder 30 extends to push the slide 2 31 to move to the right, and the slide 2 31 drives the two optical rails 32 to move to the right, and the two optical rails 32 and the mounting seat 29 slide and limit to assist the slide 2 31 to support the slide 2, and the movement of the slide 2 31 is flexible and stable, and the push cylinder 5 46 extends to make the outer shaft 10 move to the left, so that the left end of the outer shaft 10 is close to the left end of the inner shaft 9, so that the disk 42 is close to the push block 3 41, so that the inclined surfaces 4 of the plurality of push rods 45 The inclined surfaces 1 of the plurality of push blocks 3 41 are respectively pressed and approached to each other, so that the plurality of push blocks 3 41 are pushed toward the outside of the disk 3 40. At the same time, the inclined surfaces 3 of the plurality of push rods 3 44 are respectively pressed and approached to the inclined surfaces 2 of the plurality of push blocks 4 43, so that the plurality of push blocks 4 43 are pushed toward the outside of the disk 4 42. The plurality of push blocks 3 41 and the plurality of push blocks 4 43 are respectively pressed against the inner walls of the copper tube 2 and the copper tube 1, so as to realize the concentric alignment and clamping of the copper tube 1 and the copper tube 2. Similarly, the contraction of the push cylinder 5 46 can cause the plurality of push blocks 3 41 and the plurality of push blocks 4 43 to contract inward to release the copper tube 1 and the copper tube 2.

[0034] like Figures 1 to 10 As shown, a plasma welding device for copper tubes of the present invention, when working, firstly, copper tube 1 is placed on multiple rollers of bracket 1 4, and copper tube 2 is placed on multiple rollers of bracket 2 5, and the push cylinder 1 11 is actuated to swing the upper part of the push plate 13 to the right, so that the push plate 13 pushes copper tube 2 to copper tube 1, so that copper tube 2 and copper tube 1 are butted, and then the push cylinder 1 11 is reversely actuated to tilt the pressing frame 1 6 and the pressing frame 2 7, so that multiple rollers of the pressing frame 1 6 are pressed tightly on copper tube 1, and multiple rollers of the pressing frame 2 7 are pressed tightly on copper tube 2, and then the push cylinder 3 30 is actuated to move the slide 2 31 to the left, so that the left ends of the inner shaft 9 and the outer shaft 10 are inserted into the copper tubes. The inner shaft 9 and the outer shaft 10 are driven by the motor 8 to rotate slowly, and the groove cutter 16 is raised to cut the groove at the connection part of the copper tube 1 and the copper tube 2. After the groove is completed, the plasma welding gun 2 emits a plasma arc to perform annular comprehensive welding on the connection part of the copper tube 1 and the copper tube 2. Finally, after the welding of the copper tube 1 and the copper tube 2 is completed, the coolant is input into the inner shaft 9 through the rotary joint 27 and sprayed to the connection part of the copper tube 1 and the copper tube 2 through the plurality of spray holes 28, so that the coolant cools the connection part of the copper tube 1 and the copper tube 2.

[0035] The main functions achieved by the present invention are:

[0036] 1. Concentrically align and clamp the copper tube from the inside, with good concentricity to improve welding quality;

[0037] 2. The plasma welding gun is suspended above the copper tube to reduce the force on the copper tube during welding, avoid displacement or deformation of the copper tube welding part during welding, and improve the welding quality;

[0038] 3. It has linked roller and pressure roller assembly, which has good pressure holding effect on copper tube;

[0039] 4. It can cut the groove of copper tube and recycle the copper chips.

[0040] The plasma welding equipment for copper tubes of the present invention has common mechanical installation, connection or setting methods, which can be implemented as long as the beneficial effects can be achieved; the mechanical arm 1, plasma welding gun 2, frame 3, bracket 1 4, bracket 2 5, clamping frame 1 6, clamping frame 2 7, motor 8, inner shaft 9, outer shaft 10, push cylinder 1 11, push cylinder 2 15, beveling knife 16, solder conveying box 18, funnel 19, crushing roller 20, slide 1 23, sliding seat 24, lifting rod 25, rotary joint 27, push cylinder 3 30, optical rail 32, push cylinder 4 39, push cylinder 5 46 of the plasma welding equipment for copper tubes of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A plasma welding device for copper tubes, comprising a robot arm (1) and a plasma welding gun (2), wherein the plasma welding gun (2) is mounted on the robot arm (1); characterized in that: The machine also includes a frame (3), a bracket (4), a bracket (5), a pressing frame (6), a pressing frame (7), a motor (8), an inner shaft (9), an outer shaft (10), a slide assembly and a clamping assembly. The bracket (4) and the bracket (5) are mounted on the left side of the frame (3). A plurality of rollers are rotatably mounted on the bracket (4) and the bracket (5). The lower ends of the pressing frame (6) and the pressing frame (7) are rotatably mounted on the left side of the frame (3). A plurality of pressure rollers are mounted on the pressing frame (6) and the pressing frame (7). The pressure rollers on the pressing frame (6) are arranged opposite to the rollers on the bracket (4). The pressure rollers on the pressing frame (7) are arranged opposite to the rollers on the bracket (2). The rollers on (5) are arranged relatively, the slide assembly is installed on the frame (3), the motor (8) is installed on the slide assembly, the right end of the inner shaft (9) is rotatably installed on the slide assembly, the inner shaft (9) is connected to the output shaft of the motor (8), the outer shaft (10) is telescopically sleeved on the left part of the inner shaft (9), the inner shaft (9) and the left part of the outer shaft (10) extend into the copper tube, a clamping assembly is installed between the left end of the inner shaft (9) and the left end of the outer shaft (10), the clamping assembly is synchronously opened when the inner shaft (9) and the outer shaft (10) are relatively telescopic, and the butt joints of the two copper tubes are aligned and clamped and fastened from the inside, and the plasma welding gun (2) is aligned with the butt joints of the two copper tubes.

2. The plasma welding equipment for copper tubes according to claim 1, characterized in that: It comprises a push cylinder (11) and a pull rod (12), one end of the push cylinder (11) is rotatably connected to the frame (3), the other end of the push cylinder (11) is rotatably connected to the middle of the pressing frame (7), one end of the pull rod (12) is rotatably connected to the middle of the pressing frame (6), and the other end of the pull rod (12) is rotatably connected to the middle of the pressing frame (7).

3. The plasma welding equipment for copper tubes according to claim 2, characterized in that: It also includes a push plate (13) and a second pull rod (14), the middle part of the push plate (13) is rotatably connected to the frame (3), the push plate (13) is located at the left end of the frame (3), the lower end of the push plate (13) is rotatably connected to the left end of the second pull rod (14), and the right end of the second pull rod (14) is rotatably connected to the middle part of the second pressing frame (7).

4. The plasma welding equipment for copper tubes according to claim 1, characterized in that: It also includes a push cylinder 2 (15) and a beveling knife (16), wherein the push cylinder 2 (15) is mounted on the frame (3), and the beveling knife (16) is mounted on the piston rod of the push cylinder 2 (15), and the beveling knife (16) is located below the plasma welding gun (2).

5. The plasma welding equipment for copper tubes as claimed in claim 4, characterized in that: The invention also comprises a collecting basket (17), a solder conveying box (18), a funnel (19), two crushing rollers (20), two wheel discs (21) and a plurality of stirring rods (22); the collecting basket (17) is mounted on the second push cylinder (15); the solder conveying box (18) is mounted on the plasma welding gun (2); the funnel (19) is mounted on the feed port of the solder conveying box (18); the discharge port of the solder conveying box (18) is connected to the feed port of the plasma welding gun (2) via a pipeline; the two crushing rollers (20) are rotatably mounted in the solder conveying box (18); the two wheel discs (21) are rotatably mounted in the solder conveying box (18); the two wheel discs (21) are located below the two crushing rollers (20); and the two wheel discs (21) are both mounted with a plurality of stirring rods (22).

6. The plasma welding equipment for copper tubes as claimed in claim 5, characterized in that: The robot arm (1) comprises a slide table (23), a sliding seat (24), a lifting rod (25) and a crossbeam (26), wherein the slide table (23) is mounted on the outer side of the frame (3), the sliding seat (24) is slidably mounted on the slide table (23), the lower end of the lifting rod (25) is mounted on the sliding seat (24), one end of the crossbeam (26) is rotatably mounted on the upper end of the lifting rod (25), the plasma welding gun (2) is mounted on the other end of the crossbeam (26), and the solder conveying box (18) is mounted on the crossbeam (26).

7. The plasma welding equipment for copper tubes according to claim 1, characterized in that: It also includes a rotary joint (27) and a plurality of spray holes (28); the inner shaft (9) is tubular; the rotary joint (27) is installed at the right end of the inner shaft (9); the output end of the rotary joint (27) is connected to the inside of the inner shaft (9); the plurality of spray holes (28) are arranged on the outer wall of the left end of the inner shaft (9); and the plurality of spray holes (28) are located outside the left end of the outer shaft (10).

8. The plasma welding equipment for copper pipes according to claim 1, characterized in that: The slide assembly comprises a mounting seat (29), a push cylinder three (30), a slide two (31) and two optical rails (32), wherein the mounting seat (29) is mounted on the right end of the frame (3), the fixed end of the push cylinder three (30) is mounted on the mounting seat (29), the piston rod of the push cylinder three (30) is connected to the slide two (31), the right ends of the two optical rails (32) are connected to the slide two (31), the two slides two (31) are slidably connected to the mounting seat (29), the motor (8) is mounted on the slide two (31), and the inner shaft (9) is rotatably mounted on the slide two (31).

9. The plasma welding equipment for copper tubes according to claim 8, characterized in that: The clamping assembly comprises a disc 1 (33), a plurality of push blocks 1 (34), a disc 2 (35), a plurality of push blocks 2 (36), a plurality of push rods 1 (37), a plurality of push rods 2 (38) and a push cylinder 4 (39), wherein the disc 1 (33) is concentrically mounted on the left end of the inner shaft (9), a plurality of inclined grooves 1 are circumferentially arranged on the right end surface of the disc 1 (33), a plurality of push blocks 1 (34) are slidably mounted in the plurality of inclined grooves 1 of the disc 1 (33), the disc 2 (35) is concentrically mounted on the left end of the outer shaft (10), a plurality of inclined grooves 1 are circumferentially arranged on the left end surface of the disc 2 (35) Slide groove two, multiple push blocks two (36) are respectively slidably installed in multiple inclined slide grooves two of disc two (35), the left ends of multiple push rods one (37) are rotatably connected to disc one (33), the right ends of multiple push rods one (37) are respectively rotatably connected to multiple push blocks two (36), the right ends of multiple push rods two (38) are rotatably connected to disc two (35), the left ends of multiple push rods two (38) are respectively rotatably connected to multiple push blocks one (34), one end of push cylinder four (39) is connected to the right end of the inner shaft (9), and the other end of push cylinder four (39) is connected to the right end of the outer shaft (10).

10. The plasma welding equipment for copper tubes according to claim 8, characterized in that: The clamping assembly comprises a disc three (40), a plurality of push blocks three (41), a disc four (42), a plurality of push blocks four (43), a plurality of push rods three (44), a plurality of push rods four (45) and a push cylinder five (46); the disc three (40) is concentrically mounted on the left end of the inner shaft (9); a plurality of slide grooves three are circumferentially arranged on the right end surface of the disc three (40); a plurality of push blocks three (41) are respectively slidably mounted in the plurality of slide grooves three of the disc three (40); an inclined surface one is arranged at the inner end of each of the plurality of push blocks three (41); the disc four (42) is concentrically mounted on the left end of the outer shaft (10); a plurality of slide grooves four are circumferentially arranged on the left end surface of the disc four (42); a plurality of push blocks four (43) are respectively slidably mounted in the plurality of slide grooves of the disc four (42). In the fourth embodiment, the inner ends of the plurality of push blocks four (43) are all provided with inclined surfaces two, the left ends of the plurality of push rods three (44) are mounted on the disk three (40), the right ends of the plurality of push rods three (44) are all provided with inclined surfaces three matching the inclined surfaces two of the push blocks four (43), the plurality of push rods three (44) are respectively aligned with the inner ends of the plurality of push blocks four (43), the right ends of the plurality of push rods four (45) are mounted on the disk four (42), the left ends of the plurality of push rods four (45) are all provided with inclined surfaces four matching the inner ends of the push blocks three (41), the plurality of push rods four (45) are respectively aligned with the inner ends of the plurality of push blocks three (41), one end of the push cylinder five (46) is connected to the right end of the inner shaft (9), and the other end of the push cylinder five (46) is connected to the right end of the outer shaft (10).

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