Anti-deformation positioning tool and method for stainless steel pipe welding

Abstract

The invention discloses an anti-deformation positioning tool and method for stainless steel pipe welding, which relates to the technical field of welding tool, including a tool frame; a positioning frame, wherein a plurality of positioning frames are arranged and fixed on the tool frame to position two parts of pipes to be welded and rotate synchronously; a door beam frame, wherein the door beam frame is fixed to the upper side of the tool frame and is arranged at the joint of the pipes; a conveyor, wherein the conveyor is fixedly connected to the door beam frame and is arranged obliquely, and the conveyor is used to convey the welding wire; a welding gun adjustment frame, wherein the welding gun adjustment frame is fixedly connected to the door beam frame and is arranged obliquely; the invention can adapt to the positioning of pipes of different diameters and can also perform axial driving, which is beneficial to welding; the weld width and the swing amplitude of the welding gun can be adjusted accordingly to meet welding requirements; it is prevented that the dripping molten body hangs on the pipe port, thereby preventing poor welding caused by it; a closed cavity is formed to accommodate the upper part of the pipe wrapped with argon gas, thereby avoiding reaction with gas in the air and improving welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling, and in particular to an anti-deformation positioning tooling and a method for welding a stainless steel pipe. Background Art

[0002] Stainless steel pipe welding is usually divided into manual welding and automated welding; manual welding usually uses pre-welding of points, and then welding in one direction; the specific operation is to use fixed tooling for pre-fixing during welding, and then reserve the required welding gap, and then pre-fix the fixed pipes through fixed connecting welding points or welding sheets to fix the two pipes together, and then weld along the weld. Existing automated welding is similar to manual welding, with the same previous processing steps, requiring pre-welding of multiple points, and then welding them into one, and welding the pre-welded points together through automated welding.

[0003] The main difficulty in welding lies in the need to align the center of the weld during welding, and to keep the welding gun and the pipe stable when they rotate relative to each other to avoid deformation during welding. Therefore, the pipe needs to be fixed by a fixed tool to prevent welding deformation.

[0004] A stainless steel pipe welding device with authorization announcement number CN117900720B is equipped with a support component that can weld steel pipes of any length and is easy to disassemble and install. In combination with a traction component, it can realize semi-automatic steel pipe welding, thereby improving the efficiency of steel pipe welding. The support component can also adjust the entire device to a coaxial position with the steel pipe, thereby improving the welding accuracy. By setting a unique motion trajectory of the welding part, the welding part can weld a fish scale-shaped weld at the weld of the two steel pipes, thereby making the weld more beautiful and the quality can be guaranteed.

[0005] In the above technical solution, a method of fixing and restricting the pipe is used to prevent deformation during welding. However, this solution can only adapt to one specification of weld width during welding. At the same time, the position of the pipe remains fixed, and the position of the welding gun moves. The argon gas required for welding cannot immerse the welding area, which can easily cause the molten welding wire to react with the gas in the air, thereby affecting the welding quality. Summary of the invention

[0006] The purpose of the present invention is to provide an anti-deformation positioning tool and method for stainless steel pipe welding, which solves the problems of deformation during welding, inability to adapt to various weld sizes and easy reaction of welding wire to air.

[0007] The present invention solves the above technical problems through the following technical solutions. The present invention includes a tooling frame;

[0008] Positioning frames, wherein a plurality of positioning frames are provided and fixed on the tooling frame to position two parts of the pipe to be welded and to rotate synchronously;

[0009] A door beam frame, which is fixed to the upper side of the tooling frame and arranged at the butt joint of the pipes;

[0010] A conveyor, the conveyor is fixedly connected to the door beam frame and is arranged obliquely, and the conveyor is used to convey the welding wire;

[0011] A welding gun adjustment frame, the welding gun adjustment frame is fixedly connected to the door beam frame and is tilted, and the welding gun adjustment frame is used to fix the welding gun and drive the welding gun to form a swinging motion;

[0012] A separation mechanism, which is arranged at the lower side of the door beam frame and fixed to the tooling frame, and is used to separate the pipes to be welded to form a gap to be welded;

[0013] The pushing structure is fixedly connected to the tooling frame, and is used to adjust the lifting and lowering of the separation mechanism so as to change the width of the gap to be welded. The pushing structure is used to adjust the swing amplitude of the welding gun adjustment frame to adapt to the gap to be welded.

[0014] Preferably, the positioning frame includes a horizontal frame fixed to the tooling frame, a supporting wheel group for supporting the pipe is arranged in the middle of the horizontal frame, both ends of the horizontal frame are rotatably connected to rocker arms, one end of the two rocker arms is provided with a directional wheel for abutting the pipe, a pusher is arranged between the other end of the directional wheel and the horizontal frame to adjust the swing of the rocker arm, two adjacent supporting wheel groups are fixed by a coupling, and a driving motor is arranged on the horizontal frame to drive the supporting wheel group through a transmission structure.

[0015] Preferably, the portal beam frame includes a portal frame fixed to the upper side of the tooling frame, a screw rod is provided through the portal frame, a nut is threadedly connected to the screw rod and contacts the upper side of the portal frame, and a mounting piece is fixed to the lower end of the screw rod.

[0016] Preferably, the conveyor comprises a conveying pipe detachably fixed on the mounting member to guide the welding wire, a transparent window is provided on the conveying pipe, and a wire feeding assembly is fixed on the mounting member and arranged at the transparent window to feed the welding wire;

[0017] The wire feeding assembly includes a fixing part on a fixed mounting part, and two wire feeding wheels close to each other are rotatably connected to the fixing part. Both of the wire feeding wheels extend into the transparent window to clamp the welding wire. A motor is fixed on the fixing part and is connected to and drives one of the wire feeding wheels.

[0018] Preferably, the welding gun adjustment frame includes a sleeve rotatably connected to the mounting member, a fixing bar is fixed on the sleeve, a linear groove is provided on the fixing bar, a curved frame is fixed on the mounting member, an adjuster is fixed on the curved frame, a right-angle plate is connected to the adjuster, a second motor is fixed on the right-angle plate, and a crankshaft is fixed on the output shaft of the second motor and inserted into the linear groove;

[0019] The regulator includes a sealing cylinder fixed on a curved frame, a fluid is arranged in the sealing cylinder, a piston is slidably arranged in the sealing cylinder, a push rod is fixed on the piston, one end of the push rod passes through the sealing cylinder and is connected to a right-angle plate, and a curved pipe is connected to the sealing cylinder.

[0020] Preferably, the separation mechanism includes two slide members fixed on the lower side of the tooling frame, a U-shaped plate is slidably arranged between the two slide members through a slider, an isolation wheel is rotatably connected to the U-shaped plate, and the lower side of the U-shaped plate is fixed to the bottom block by a connecting spring.

[0021] Preferably, the isolation wheel extends in a stepped manner along the radial direction, and the isolation wheel gradually becomes thinner along the radial direction to be divided into region one, region two and region three.

[0022] Preferably, the pushing structure includes a driving component 1 connected to the regulator, and also includes a driving component 2 connected to the bottom block;

[0023] The driving assembly 1 includes a straight sealing cylinder, a fluid is arranged in the straight sealing cylinder, the straight sealing cylinder is fixed to the tooling frame through a connecting piece, a piston 2 is slidably arranged in the straight sealing cylinder, a push rod 2 is fixed on the piston 2, one end of the push rod 2 passes through the straight sealing cylinder and extends outward, and a connecting hose on the straight sealing cylinder is connected to the curved pipe;

[0024] The driving assembly 2 comprises a folding sealing cylinder, a fluid is arranged in the folding sealing cylinder, the folding sealing cylinder is fixed to the straight sealing cylinder, a piston 3 is slidably arranged in the folding sealing cylinder, a push rod 3 is fixed on one side of the piston 3, one end of the push rod 3 penetrates the inner wall of the folding sealing cylinder and extends outward, a piston 4 is slidably arranged in the folding sealing cylinder, a push rod 4 is fixed on one side of the piston 4 and connected to the bottom block;

[0025] The same end of the push rod 2 and the push rod 3 is connected to a telescopic device for driving, and the telescopic device is fixed on the tooling frame.

[0026] Preferably, a closed structure is provided on the periphery of the portal frame, and a downwardly opening accommodating chamber is formed between the closed structure and the portal frame to accommodate argon gas, so that the pipe to be welded can be partially immersed in the accommodating chamber, and a movable balloon is provided in the accommodating chamber, and the balloon is filled with argon gas to monitor the argon filling amount of the accommodating chamber by the floating position of the balloon; the closed structure includes two outer plates fixed on the portal frame for half-wrapping the portal frame, outer protective shells are provided on both sides of the portal frame, and a notch is provided at the lower end of the outer protective shell, and shielding films for covering the notch are provided on the two outer plates.

[0027] A method for using an anti-deformation positioning tool for stainless steel pipe welding, using the anti-deformation positioning tool to perform the following steps:

[0028] Step 1: Pretreatment of pipes: remove dirt and burrs from the ends of the pipes to be welded;

[0029] Step 2, tooling preset: determine the preset weld size according to the diameter and thickness of the pipe, control the pushing structure to adjust the welding gun adjustment frame and the separation mechanism; put the required welding wire into the conveyor, and then fix the welding gun on the welding gun adjustment frame so that the welding gun welding needle on the welding gun adjustment frame corresponds to the welding wire on the conveyor, and then flush argon gas into the accommodation cavity formed by the closed structure and the door beam frame;

[0030] Step 3: Pipe placement: Place the pre-treated pipe on the positioning frame, and make the ends to be welded contact with the separation mechanism respectively, and control the positioning frame to position and clamp the pipe;

[0031] Step 4: Pipe welding: Start the conveyor and the welding gun adjustment frame to fix the molten welding wire on the pipe to close the gap between the pipes, and use the positioning frame to rotate the two parts of the pipe synchronously for one circle to achieve automated welding.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. By using multiple positioning frames to clamp and position the required pipes, it can adapt to pipes of different diameters and can also perform axial drive; and the multiple positioning frames are driven synchronously, which is conducive to the relative stillness between the two pipes, thereby facilitating welding.

[0034] 2. Setting up a partition mechanism to divide the weld width can not only facilitate setting the weld width to a fixed value, but also lock the center position of the weld, which is conducive to the alignment and placement of the pipe; the role of the welding gun adjustment frame is to adapt the determined weld width to the swing amplitude of the welding gun. By pushing the synchronous drive adjustment of the structure, the position of the partition mechanism is changed, so that a certain width of weld is obtained between the pipes through the three areas of the partition mechanism. The welding gun adjustment frame changes the swing amplitude of the welding gun accordingly, thereby meeting different welding requirements.

[0035] 3. A partition mechanism is set between two pipes to make the molten material that falls during welding contact with the two pipes, so that the falling molten material is dispersed through the steps by utilizing the step gradient of the partition mechanism, thereby preventing the dripping molten material from hanging on the pipe port and causing poor welding.

[0036] 4. The use of a closed structure can form a complete accommodating cavity with the door frame. The closed cavity formed on the top can accommodate argon gas to be retained in the accommodating cavity. Since the density of argon gas is smaller than that of air under the same conditions, argon gas will be retained in the accommodating cavity, thereby forming an argon gas zone. The outer plate is elastic and can wrap the upper part of the pipe to adapt to pipes of different diameters, and the welding area is in an argon atmosphere, thereby avoiding reaction with gas in the air, thereby greatly improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the present invention;

[0038] Figure 2 for Figure 1 Schematic diagram of partial structural blasting;

[0039] Figure 3 for Figure 2 Schematic diagram of some structures;

[0040] Figure 4 for Figure 3 A schematic diagram of the structure of the middle positioning frame;

[0041] Figure 5 for Figure 2 Schematic diagram of some structures;

[0042] Figure 6 for Figure 5 Structural schematic diagram of the middle separation mechanism and the driving structure;

[0043] Figure 7 for Figure 5 Structural schematic diagram of the middle welding gun adjustment frame;

[0044] Figure 8 for Figure 5The structural diagram of the conveyor;

[0045] The numbers in the figure represent:

[0046] 1. Fixture frame; 2. Positioning frame; 21. Horizontal frame; 22. Support wheel group; 23. Rocker arm; 24. Directional wheel; 25. Pusher; 26. Driving motor; 3. Door beam frame; 31. Door frame; 32. Screw rod; 33. Nut; 34. Mounting piece; 4. Conveyor; 41. Conveying pipe; 42. Window; 43. Fixing piece; 44. Motor 1; 45. Wire feeding wheel; 5. Welding gun adjustment frame; 51. Casing; 52. Fixing strip; 53. Linear slot; 54. Curved frame; 55. Regulator; 551. Sealing cylinder; 552. Piston 1; 553. Push rod 1; 55 4. curved pipe; 56. right angle plate; 57. second motor; 58. crankshaft; 6. partition mechanism; 61. slide member; 62. slider; 63. U-shaped plate; 64. isolation wheel; 65. spring; 66. bottom block; 7. pushing structure; 70. telescope; 71. straight sealing cylinder; 72. second piston; 73. second push rod; 74. hose; 75. folding sealing cylinder; 76. third piston; 77. third push rod; 78. fourth piston; 79. fourth push rod; 8. closing structure; 81. outer protective shell; 82. notch; 83. shielding film; 84. outer plate; 9. blocking cone. DETAILED DESCRIPTION

[0047] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0048] Embodiment 1

[0049] This embodiment provides a technical solution: an anti-deformation positioning tool and method for stainless steel pipe welding, such as Figure 1 - Figure 3 As shown, it includes a tooling frame 1 and a plurality of positioning frames 2 arranged on the tooling frame 1, and the plurality of positioning frames 2 are used to position two parts of pipes to be welded and rotate synchronously; in this embodiment, the number of positioning frames 2 is set to four, which are equally arranged on the upper side of the tooling frame 1 to limit the positioning of the pipes to be welded.

[0050] For further reference, Figure 1 and Figure 4 The positioning frame 2 includes a horizontal frame 21 fixed to the tooling frame 1, the horizontal frame 21 is U-shaped, and a supporting wheel group 22 for supporting the pipe is arranged in the middle of the horizontal frame 21. The supporting wheel group 22 in this embodiment can refer to Figure 4As shown, it specifically includes two ear plates, and two lifting rollers are rotatably connected between the two ear plates through a rotating shaft. The two upper ends of the cross frame 21 are rotatably connected to rocker arms 23 through fixed shafts, and one end of the two rocker arms 23 is provided with a directional wheel 24 for abutting against the pipe material, and a pusher 25 is provided between the other end of the directional wheel 24 and the cross frame 21 to adjust the swing of the rocker arm 23. In this embodiment, the pusher 25 is set as an electric push rod; the two adjacent support roller groups 22 are fixed by a coupling, and the corresponding structure of the coupling is not shown in the drawings. A driving motor 26 is provided on the cross frame 21 to drive the support roller group 22 through a transmission structure.

[0051] When fixing the pipe, the cross frame 21 is used to hold up the pipe, and the pushing action of the pusher 25 and the lever action of the rocker arm 23 are used to make the directional wheel 24 contact and restrict the pipe. At this time, the pipe can rotate on the axis, but cannot move in the axial direction, thereby achieving the purpose of restricting the pipe, and adjacent cross frames 21 are connected by couplings to synchronize the rotation, thereby achieving synchronous drive.

[0052] refer to Figure 1 and Figure 5 A door beam frame 3 is fixed on the upper side of the tooling frame 1, and the door beam frame 3 is arranged at the butt joint of the pipes;

[0053] Further, the door beam frame 3 includes a door frame 31 fixed to the upper side of the tooling frame 1, the door frame 31 is in the shape of a gantry, a top plate is also provided on the door frame 31, a round hole is opened on the top plate, a screw 32 passing through the round hole is provided on the door frame 31, a nut 33 is threadedly connected to the screw 32 and contacts the upper side of the door frame 31, so that the screw 32 is supported by the bearing effect of the nut 33, and the lower end of the screw 32 is fixed with a mounting member 34. For specific structure, refer to Figure 5 .

[0054] A guide rod is provided through the top plate, and the guide rod is fixed to the mounting member 34 , so that the position adjustment between the screw rod 32 and the door frame 31 can keep the sliding direction locked through the guidance of the mounting member 34 .

[0055] refer to Figure 5 and Figure 8 A conveyor 4 is fixedly mounted on the door beam frame 3, and the conveyor 4 is tilted. The conveyor 4 is used to convey the welding wire; the discharge port of the conveyor 4 is narrowed so that the welding wire can maintain a stable discharge.

[0056] Further, the conveyor 4 includes a conveying tube 41 that can be detachably fixed on the mounting member 34 to guide the welding wire. In this embodiment, a collar is fixed on the mounting member 34, and bolts are connected to the collar to fix the conveyor 4. A through window 42 is provided on the outer periphery of the conveying tube 41, and a wire feeding assembly is fixed on the mounting member 34. The wire feeding assembly is arranged at the through window 42 to feed the welding wire; Figure 8 ;

[0057] The wire feeding assembly includes a fixing member 43 on the fixing mounting member 34, and two wire feeding wheels 45 close to each other are rotatably connected to the fixing member 43. Both wire feeding wheels 45 extend into the transparent window 42 to clamp the welding wire. A motor 44 is fixed on the fixing member 43 and connected to and drives the wire feeding wheels 45. Figure 8 .

[0058] Among them, the motor 44 is connected to an external control device, and the rotation speed of the wire feeding wheel 45 is controlled by controlling the rotation speed of the motor 44. The welding wire interspersed between the two wire feeding wheels 45 is transported by the rotation of the wire feeding wheels 45, and an observation port is also provided on the delivery pipe 41.

[0059] refer to Figure 5 and Figure 7 A welding gun adjusting frame 5 is fixedly mounted on the door beam frame 3, and the welding gun adjusting frame 5 is tilted. The welding gun adjusting frame 5 is used to fix the welding gun and drive the welding gun to form a swinging motion;

[0060] Furthermore, the welding gun adjustment frame 5 includes a sleeve 51 rotatably connected to the mounting member 34 via a rotating shaft, and a bolt is also provided on the sleeve 51 to abut and fix the welding gun; a fixing bar 52 is fixed to the sleeve 51, and a linear groove 53 is provided on the fixing bar 52. The setting direction of the fixing bar 52 and the linear groove 53 corresponds to the direction of the welding gun, and a curved frame 54 is fixed to the mounting member 34, and the curved frame 54 is curved to avoid movement restriction when the welding gun swings; an adjuster 55 is fixed to the curved frame 54, and a right-angle plate 56 is connected to the adjuster 55. The adjuster 55 is used to adjust the position of the right-angle plate 56, and a motor 2 57 is fixed to the right-angle plate 56. The motor 2 57 is connected to an external control device, and a crankshaft 58 is fixed on the output shaft of the motor 2 57 and inserted into the linear groove 53; the crankshaft 58 is a non-straight rod shape, which can be referred to Figure 7 .

[0061] The regulator 55 includes a sealing cylinder 551 fixed on the curved frame 54, a fluid is arranged in the sealing cylinder 551, a piston 552 is slidably arranged in the sealing cylinder 551, a push rod 553 is fixed on the piston 552, one end of the push rod 553 passes through the sealing cylinder 551 and is connected to the right angle plate 56, and a curved pipe 554 is connected to the sealing cylinder 551.

[0062] Among them, since the regulator 55 can control the moving position of the right-angle plate 56, the adjustment direction of the right-angle plate 56 is fixed axial and cannot rotate. Therefore, when the position of the right-angle plate 56 moves, the position of the crankshaft 58 will also move; and when the crankshaft 58 is closer to the sleeve 51, the swing amplitude of the welding gun on the sleeve 51 increases, and vice versa.

[0063] refer to Figure 1 and Figure 6A separator 6 is fixed to the lower side of the tooling frame 1, and the separator 6 is used to separate the pipes to be welded to form a gap to be welded;

[0064] Furthermore, the separation mechanism 6 includes two slide members 61 fixed on the lower side of the tooling frame 1, and slide grooves are provided on both slide members 61. A slider 62 is slidably connected to a U-shaped plate 63 through the slide grooves. An isolation wheel 64 is rotatably connected to the U-shaped plate 63. The isolation wheel 64 is used to separate the two pipes to be welded. The isolation wheel 64 is arranged on the vertical line of the load-bearing center of the cross frame 21. The lower side of the U-shaped plate 63 is connected to a spring 65. The elastic characteristics of the spring 65 can make the isolation wheel 64 on the slider 62 shrink and descend. The lower end of the spring 65 is fixed to a bottom block 66, and a telescopic sleeve is arranged between the bottom block 66 and the slider 62.

[0065] Specifically, the isolation wheel 64 extends in a step-like manner along the radial direction, and the isolation wheel 64 gradually becomes thinner along the radial direction to be divided into region one, region two, and region three.

[0066] Among them, during welding, the isolation wheel 64 can maintain the distance between the two pipes and prevent the falling molten material from dripping on the pipe mouth of the welding pipe, thereby avoiding welding defects; at the same time, after welding, the formed weld acts on the isolation wheel 64, and the elastic effect of the spring 65 can make the isolation wheel 64 move downward, which is beneficial to the continuous welding of the pipe.

[0067] refer to Figure 2 , Figure 5 and Figure 6 A pushing structure 7 is fixed on the tooling frame 1, and the pushing structure 7 is used to adjust the lifting and lowering of the separation mechanism 6 so as to change the width of the gap to be welded. The pushing structure 7 is used to adjust the swing amplitude of the welding gun adjustment frame 5 to adapt to the gap to be welded.

[0068] The pushing structure 7 includes a driving component 1 connected to the regulator 55 and a driving component 2 connected to the bottom block 66;

[0069] The driving component 1 includes a straight sealing cylinder 71, a fluid is arranged in the straight sealing cylinder 71, the straight sealing cylinder 71 is fixed to the tooling frame 1 through a connecting piece, a piston 2 72 is slidably arranged in the straight sealing cylinder 71, a push rod 2 73 is fixed on the piston 2 72, one end of the push rod 2 73 penetrates the straight sealing cylinder 71 and extends outward, and a connecting hose 74 on the straight sealing cylinder 71 is connected to the curved pipe 554;

[0070] A fluid is arranged in the cavity formed by the piston 1 552, the curved pipe 554, the hose 74, the piston 2 72 and other components.

[0071] The second driving assembly includes a folding sealing cylinder 75, in which a fluid is arranged, the folding sealing cylinder 75 is fixed to the straight sealing cylinder 71, a piston 3 76 is slidably arranged in the folding sealing cylinder 75, a push rod 3 77 is fixed to one side of the piston 3 76, one end of the push rod 3 77 penetrates the inner wall of the folding sealing cylinder 75 and extends outward, a piston 4 78 is slidably arranged in the folding sealing cylinder 75, and a push rod 4 79 is fixed to one side of the piston 4 78 and connected to the bottom block 66;

[0072] The piston four 78, the folding sealing cylinder 75 and the piston three 76 form a cavity in which a fluid is arranged.

[0073] The same end of the push rod 2 73 and the push rod 3 77 is connected to the telescopic device 70 for driving, and the telescopic device 70 is fixed on the tooling frame 1. In this embodiment, the telescopic device 70 uses an electric push rod, and the telescopic end of the electric push rod is connected to the piston 3 76 and the push rod 2 73.

[0074] It should be noted that all the fluids mentioned above are hydraulic oils.

[0075] Among them, by starting the telescopic device 70, the piston three 76 and the push rod two 73 are pushed, so that the hydraulic oil in the corresponding chamber is pushed to flow through the piston two 72 and the piston three 76 respectively, and then the corresponding piston four 78 moves to push the isolation wheel 64 on the separation mechanism 6 to adjust the position, and the regulator 55 pushes the right-angle plate 56 to move the position to achieve synchronous adjustment.

[0076] Embodiment 2

[0077] This embodiment is further optimized on the basis of the first embodiment, and the same parts as the above technical solution will not be repeated here. Figure 2 As shown, in order to better realize the present invention, the following arrangement is particularly adopted: a closed structure 8 is arranged on the periphery of the portal frame 3, and a downwardly opening accommodating chamber is formed between the closed structure 8 and the portal frame 3 to accommodate argon, so that the pipe to be welded is partially immersed in the accommodating chamber, and a movable balloon is arranged in the accommodating chamber, and the balloon is filled with argon to monitor the argon filling amount of the accommodating chamber by the floating position of the balloon; the closed structure 8 includes two outer plates 84 fixed on the portal frame 3 for half-wrapping the portal frame 3, outer protective shells 81 are arranged on both sides of the portal frame 3, and a notch 82 is arranged at the lower end of the outer protective shell 81, and a shielding film 83 covering the notch 82 is arranged on the two outer plates 84; in this embodiment, the outer plates 84 are made of rubber material, and the purpose is to have elasticity to facilitate fitting of the pipe.

[0078] The tooling frame 1 is also provided with two plugging cones 9 for plugging the pipe openings of the pipes to be welded, thereby preventing or reducing the leakage of argon gas at both ends of the pipes.

[0079] It should be noted that the balloon is not shown in the figure in this embodiment. The density of argon is smaller than that of air, so the argon will be retained in the containing cavity, thereby forming an argon zone. The outer plate 84 is elastic and can wrap the upper part of the pipe to adapt to pipes of different diameters, and the welding area is in an argon atmosphere, thereby avoiding reaction with gases in the air, thereby greatly improving the welding quality.

[0080] A method for using an anti-deformation positioning tool for stainless steel pipe welding, using the anti-deformation positioning tool to perform the following steps:

[0081] Step 1: Pretreatment of pipes: remove dirt and burrs from the ends of the pipes to be welded;

[0082] Step 2, tooling preset: determine the preset weld size according to the diameter and thickness of the pipe, control the pushing structure 7 to adjust the welding gun adjustment frame 5 and the separation mechanism 6; put the required welding wire into the conveyor 4, and then fix the welding gun on the welding gun adjustment frame 5 so that the welding gun welding needle on the welding gun adjustment frame 5 corresponds to the welding wire on the conveyor 4, and then fill the accommodating cavity formed by the closing structure 8 and the door beam frame 3 with argon gas;

[0083] Step 3, pipe placement: place the pre-treated pipe on the positioning frame 2, and make the ends to be welded contact with the separation mechanism 6 respectively, and control the positioning frame 2 to position and clamp the pipe;

[0084] Step 4, pipe welding: start the conveyor 4 and the welding gun adjustment frame 5 to fix the molten welding wire on the pipe to close the gap between the pipes, and use the positioning frame 2 to synchronously rotate the two parts of the pipe for one circle to achieve automatic welding.

[0085] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. An anti-deformation positioning tool for stainless steel pipe welding, characterized in that: include: Tooling rack (1); A positioning frame (2), wherein a plurality of positioning frames (2) are provided and fixed on the tooling frame (1) to position two parts of the pipe to be welded and to rotate synchronously; A door beam frame (3), the door beam frame (3) being fixed to the upper side of the tooling frame (1) and arranged at the butt joint of the pipes; A conveyor (4), the conveyor (4) being fixedly connected to the door beam frame (3) and arranged at an angle, and the conveyor (4) being used to convey the welding wire; A welding gun adjustment frame (5), the welding gun adjustment frame (5) being fixedly connected to the door beam frame (3) and arranged obliquely, the welding gun adjustment frame (5) being used to fix the welding gun and drive the welding gun to form a swinging motion; A separation mechanism (6), the separation mechanism (6) being arranged on the lower side of the door beam frame (3) and fixed to the tooling frame (1), the separation mechanism (6) being used to separate the pipes to be welded to form a gap to be welded; A pushing structure (7), the pushing structure (7) being fixedly connected to the tooling frame (1), the pushing structure (7) being used to adjust the lifting and lowering of the separation mechanism (6) so as to change the width of the gap to be welded, and the pushing structure (7) being used to adjust the swing amplitude of the welding gun adjustment frame (5) to adapt to the gap to be welded; The door beam frame (3) comprises a door frame (31) fixed to the upper side of the tooling frame (1), a screw rod (32) passing through the door frame (31), a nut (33) being threadedly connected to the screw rod (32) and contacting the upper side of the door frame (31), and a mounting piece (34) being fixed to the lower end of the screw rod (32); The welding gun adjustment frame (5) comprises a sleeve (51) rotatably connected to the mounting member (34); a fixing bar (52) is fixed to the sleeve (51); a straight groove (53) is formed on the fixing bar (52); a curved frame (54) is fixed to the mounting member (34); an adjuster (55) is fixed to the curved frame (54); a right-angle plate (56) is connected to the adjuster (55); a second motor (57) is fixed to the right-angle plate (56); a crankshaft (58) is fixed to the output shaft of the second motor (57) and is inserted into the straight groove (53); The regulator (55) comprises a sealing cylinder (551) fixed on a curved frame (54), a fluid is arranged in the sealing cylinder (551), a piston (552) is slidably arranged in the sealing cylinder (551), a push rod (553) is fixed on the piston (552), one end of the push rod (553) passes through the sealing cylinder (551) and is connected to the right-angle plate (56), and a curved pipe (554) is connected to the sealing cylinder (551); The partition mechanism (6) comprises two slide members (61) fixed to the lower side of the tooling frame (1); a U-shaped plate (63) is slidably arranged between the two slide members (61) via a slider (62); an isolation wheel (64) is rotatably connected to the U-shaped plate (63); and a bottom block (66) is fixed to the lower side of the U-shaped plate (63) via a connecting spring (65); The pushing structure (7) comprises a driving component 1 connected to the regulator (55), and also comprises a driving component 2 connected to the bottom block (66); The driving assembly 1 comprises a straight sealing cylinder (71), a fluid is arranged in the straight sealing cylinder (71), the straight sealing cylinder (71) is fixed to the tooling frame (1) via a connecting piece, a piston 2 (72) is slidably arranged in the straight sealing cylinder (71), a push rod 2 (73) is fixed on the piston 2 (72), one end of the push rod 2 (73) penetrates the straight sealing cylinder (71) and extends outwards, and a connecting hose (74) on the straight sealing cylinder (71) is connected to the curved pipe (554); The driving assembly 2 comprises a folding sealing cylinder (75), a fluid is arranged in the folding sealing cylinder (75), the folding sealing cylinder (75) is fixed to the straight sealing cylinder (71), a piston 3 (76) is slidably arranged in the folding sealing cylinder (75), a push rod 3 (77) is fixed to one side of the piston 3 (76), one end of the push rod 3 (77) penetrates the inner wall of the folding sealing cylinder (75) and extends outward, a piston 4 (78) is slidably arranged in the folding sealing cylinder (75), a push rod 4 (79) is fixed to one side of the piston 4 (78) and connected to the bottom block (66); The same end of the push rod 2 (73) and the push rod 3 (77) is connected to a telescopic device (70) for driving, and the telescopic device (70) is fixed on the tooling frame (1).

2. The anti-deformation positioning tool for stainless steel pipe welding according to claim 1, characterized in that: The positioning frame (2) comprises a cross frame (21) fixed to the tooling frame (1); a supporting wheel group (22) for supporting the pipe is arranged in the middle of the cross frame (21); both ends of the cross frame (21) are rotatably connected to rocking arms (23); one end of each of the two rocking arms (23) is provided with a directional wheel (24) for abutting against the pipe; a pusher (25) is arranged between the other end of the directional wheel (24) and the cross frame (21) to adjust the swing of the rocking arm (23); two adjacent supporting wheel groups (22) are fixed by a coupling; and a driving motor (26) is arranged on the cross frame (21) to drive the supporting wheel group (22) through a transmission structure.

3. The anti-deformation positioning tool for stainless steel pipe welding according to claim 1, characterized in that: The conveyor (4) comprises a conveying pipe (41) detachably fixed to the mounting member (34) for guiding the welding wire, a transparent window (42) being provided on the conveying pipe (41), and a wire feeding assembly being fixed on the mounting member (34) and arranged at the transparent window (42) for feeding the welding wire; The wire feeding assembly comprises a fixing member (43) on a fixing mounting member (34), the fixing member (43) being rotatably connected to two wire feeding wheels (45) close to each other, the two wire feeding wheels (45) both extending into the transparent window (42) to clamp the welding wire, and a motor (44) being fixed on the fixing member (43) and connected to and driving one of the wire feeding wheels (45).

4. The anti-deformation positioning tool for stainless steel pipe welding according to claim 1, characterized in that: The isolation wheel (64) extends in a stepped manner along the radial direction, and the isolation wheel (64) gradually becomes thinner along the radial direction to be divided into region one, region two and region three.

5. The anti-deformation positioning tool for stainless steel pipe welding according to claim 1, characterized in that: The periphery of the portal frame (3) is provided with a closed structure (8), a downwardly open accommodation chamber is formed between the closed structure (8) and the portal frame (3) to accommodate argon gas, so that the pipe to be welded is partially immersed in the accommodation chamber, and a movable balloon is provided in the accommodation chamber, and the balloon is filled with argon gas so as to monitor the argon filling amount in the accommodation chamber by the floating position of the balloon; the closed structure (8) comprises two outer plates (84) fixed on the portal frame (3) for half-wrapping the portal frame (3), outer protective shells (81) are provided on both sides of the portal frame (3), and a notch (82) is provided at the lower end of the outer protective shell (81), and a shielding film (83) for covering the notch (82) is provided on the two outer plates (84).

6. A method for using an anti-deformation positioning tool for stainless steel pipe welding, using the anti-deformation positioning tool according to claim 5 to perform the following operation steps, characterized in that ； Step 1: Pretreatment of pipes: remove dirt and burrs from the ends of the pipes to be welded; Step 2, tooling preset: determine the preset weld size according to the diameter and thickness of the pipe, control the pushing structure (7) to adjust the welding gun adjustment frame (5) and the separation mechanism (6); put the required welding wire into the conveyor (4), then fix the welding gun on the welding gun adjustment frame (5) so that the welding gun needle on the welding gun adjustment frame (5) corresponds to the welding wire on the conveyor (4), and then fill the accommodating cavity formed by the closing structure (8) and the door beam frame (3) with argon gas; Step 3, placing the pipe: placing the pre-treated pipe on the positioning frame (2), and making the ends to be welded contact with the separation mechanism (6) respectively, and controlling the positioning frame (2) to position and clamp the pipe; Step 4, pipe welding: start the conveyor (4) and the welding gun adjustment frame (5) to fix the molten welding wire on the pipe to close the gap between the pipes, and use the positioning frame (2) to synchronously rotate the two parts of the pipe for one circle to achieve automated welding.

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