Sheet metal part OTC argon arc welding machine

Abstract

The invention discloses a sheet metal part OTC argon arc welding machine, and relates to the technical field of argon arc welding machines, the sheet metal part OTC argon arc welding machine comprises a base and a current adjusting device, through use of a polishing assembly, an attaching spring contracts to drive two sections of round pipes to be attached, a fixing arc block extrudes and fixes an inner welding gun, and an inclined fixing block extrudes the inner wall of a sliding rail, so that the effect of fixing the inner welding gun, an outer welding gun and a movable support is achieved; the inner welding gun, the outer welding gun and the movable support are prevented from moving to affect welding in the welding process, the motor drives the driving gear to rotate, the two sections of round pipes rotate synchronously, the outer welding gun and the inner welding gun generate high-current and high-temperature electric arcs, the two sections of round pipes are welded, and under the protection of argon, metal oxidation and invasion of other impurities are prevented; and the two sections of circular pipes synchronously rotate to be matched with the outer welding gun and the inner welding gun to conduct welding on the inner side and the outer side, so that the possibility that gaps are generated due to the fact that the pipe walls are thick is reduced, the welding position is firmer, and the situation that the welding position is burst due to high temperature and high pressure is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of argon arc welding machines, in particular to an OTC argon arc welding machine for sheet metal parts. Background Art

[0002] OTC argon arc welding machine is a kind of equipment specially used for sheet metal welding. It adopts advanced argon arc welding technology and can provide high-quality, stable and beautiful welding effects. This welding machine generates high current and high temperature arc to partially melt the sheet metal to be welded, and then under the protection of argon gas, it prevents metal oxidation and the intrusion of other impurities, thereby achieving a firm connection. It is mainly used for sheet metal repair of automobile bodies and welding of parts, and plays a role in the manufacture and maintenance of various mechanical equipment. Sheet metal OTC argon arc welding machine has an important position in the sheet metal processing industry. Its excellent performance and reliable quality can meet various complex welding needs and provide a strong guarantee for the production of high-quality sheet metal products.

[0003] In the welding of automobile body parts, such as exhaust pipes used to discharge high-temperature and high-pressure gases, the exhaust pipe wall is set to be thicker. During welding, welders can only weld from the outside of the exhaust pipe, and it is difficult to weld the innermost pipe wall together, making the weld weak and easily burst under high temperature and pressure.

[0004] During the processing of exhaust pipes that need to be welded, they will undergo cutting, anti-corrosion and other treatments, which will cause burrs and unevenness on the circular surface of the exhaust pipe mouth, which will lead to uneven welding surfaces during butt welding. The outer side of some exhaust pipes will be coated, electroplated, etc., and the anti-corrosion outer coating will affect welding. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a sheet metal OTC argon arc welding machine, which solves the problems raised in the above background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a sheet metal OTC argon arc welding machine, used for welding thick-walled metal pipes, including a base and a current regulating device, a clamping assembly for fixing two sections of round pipes and driving the two sections of round pipes to rotate coaxially and at the same speed is arranged inside the base, and a welding assembly for welding the two sections of round pipes inside and outside is arranged inside the base.

[0009] Furthermore, the clamping assembly includes a slide rail fixedly connected to the inside of the base, a fixed frame fixedly connected to the top of the slide rail, an electric telescopic rod fixedly connected to the inside of the base, a downward rod fixedly connected to the top of the electric telescopic rod, a sliding frame slidably connected to the inside of the slide rail, a clamping block slidably connected to the inside of the fixed frame, and the clamping block is slidably connected to the electric telescopic rod.

[0010] Furthermore, a motor is fixedly connected to the outer side of the base, a driving gear is fixedly connected to the output shaft of the motor, a driven gear is rotatably connected to the outer side of the fixed frame, a rotating rod is fixedly connected to the outer side of the driven gear, a rotating ring is rotatably connected to the top of the sliding frame, and the rotating rod is slidably connected to the rotating ring.

[0011] Furthermore, the sliding frame is fixedly connected to the top of the lower half circle, the lower half circle is slidably connected to the inside of the lower half circle, the sliding frame is slidably connected to a moving block, the moving block is fixedly connected to the top of the clamping rod, the clamping rod is fixedly connected to the top of the upper half circle, the upper half circle is slidably connected to the inside of the upper clamping ring, the top of the lower half circle is fixedly connected to a relaxation spring, and the relaxation spring is fixedly connected to the upper half circle.

[0012] Furthermore, a clamping spring is fixedly connected to the outer side of the sliding frame, and the clamping spring is fixedly connected to the sliding rail.

[0013] Furthermore, a grinding assembly for grinding the circular surface of the pipe mouth and the outer side of the two sections of circular pipes is arranged inside the base, and the grinding assembly includes a grinding motor fixedly connected to the top of the slide rail, the top of the slide rail is fixedly connected to a fixed bottom block, the top of the fixed bottom block is rotatably connected to a rotating frame, the output shaft of the grinding motor is fixedly connected to an active roller, the active roller is rotatably connected to the fixed bottom block, the outer side of the active roller is transmission-connected with a transmission belt, the top of the rotating frame is rotatably connected to a rotating roller, a grinding disc is installed on the outer side of the rotating roller, the outer side of the grinding disc is fixedly connected to a sliding rail, the interior of the sliding rail is slidably connected to a grinding arc block, the interior of the sliding rail is fixedly connected to a close-fitting spring, the close-fitting spring is fixedly connected to the grinding arc block, and the top of the rotating frame is fixedly connected to a rotating handle.

[0014] Furthermore, the welding assembly includes a movable bracket slidably connected to the inside of the slide rail, the movable bracket is rotatably connected to a clamping roller, the movable bracket is slidably connected to an external welding gun, the external welding gun is slidably connected to the clamping roller, the movable bracket is slidably connected to an internal welding gun, the outer side of the movable bracket is slidably connected to a fixed rod, the top of the fixed rod is rotatably connected to a connecting rod, the bottom of the connecting rod is rotatably connected to a fixed arc block, the fixed arc block is slidably connected to the movable bracket, and the movable bracket is slidably connected to an inclined fixed block.

[0015] Furthermore, a stabilizing assembly for reducing vibration of the welding assembly is arranged inside the base, and the stabilizing assembly includes a fixing ring fixedly connected to the outside of the inner welding gun, an inclined rod is rotatably connected to the outside of the fixing ring, a contact ball is rotatably connected to the bottom of the inclined rod, a support spring is fixedly connected to the outside of the inclined rod, and the support spring is fixedly connected to the fixing ring.

[0016] (III) Beneficial effects

[0017] The sheet metal OTC argon arc welding machine provided by the present invention has the following beneficial effects:

[0018] 1. The present invention uses a clamping assembly and a welding assembly. The user pulls and rotates the handle to move the grinding disc between the two sections of the round tube. The electric telescopic rod contracts and drives the clamping block to move downward. The upper clamping ring and the lower clamping ring clamp the fixed round tube. The grinding motor drives the active roller to rotate. The grinding disc rotates to grind the circular surface of the pipe mouth of the two sections of the round tube to make it smooth. At the same time, the grinding disc drives the grinding arc block to rotate. The grinding arc block rotates to grind the outer side of the circular surface of the two sections of the round tube close to the pipe mouth, and grinds off the oxide layer, electroplating layer, etc. of the round tube, so as to grind the pipe mouth of the two sections of the round tube. The effect on the round surface and the outer side is to grind the burrs on the round surface of the pipe mouth where the two sections of the round tube are close to each other, and to grind off the oxide layer, electroplating layer, etc. on the outer side to be welded, avoiding the oxide layer, electroplating layer, etc. affecting the quality of welding. Compared with the traditional grinder, the two grinding discs are set in parallel to make the grinding surfaces of the two sections of the round tube parallel. The two sections of the round tube are grinded at the same time, so that the two sections of the round tube can be accurately connected. The grinding disc fits the round tube more closely to avoid excessive grinding and skewed grinding surface. The grinding arc block device fits the outer arc surface of the round tube more closely, making the grinding surface smoother.

[0019] 2. The present invention uses a grinding component, and the contraction of the pressing spring drives the two sections of the round tube to press together, the fixed arc block squeezes the fixed inner welding gun, and the inclined fixed block squeezes the inner wall of the slide rail, so as to achieve the effect of fixing the inner welding gun, the outer welding gun and the movable bracket, and avoid the movement of the inner welding gun, the outer welding gun and the movable bracket during welding to affect the welding. The motor drives the driving gear to rotate, so that the two sections of the round tube rotate synchronously, the outer welding gun and the inner welding gun generate high current and high temperature arcs, so that the two sections of the round tube are welded, and the effect of welding the two sections of the round tube on the inside and outside is achieved. The two sections of the round tube rotate synchronously to cooperate with the outer welding gun and the inner welding gun to weld on the inside and outside, reducing the possibility of gaps caused by the inability to completely weld from the outside due to the thick tube wall, making the weld more firm, and avoiding the situation where the weld is burst due to high temperature and high pressure.

[0020] 3. The present invention uses a stabilizing component, and the inner welding gun drives the fixing ring to move to the inside of the round tube. Since the device will inevitably vibrate, the inner welding gun will vibrate. Four supporting springs support the inner welding gun in four directions of up, down, front and back, so that the inner welding gun is fixed, thereby achieving the effect of reducing the vibration of the inner welding gun, reducing the uneven welding caused by irregular vibration of the inner welding gun, and improving the flatness of the welding point. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of part of the structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the clamping assembly of the present invention;

[0024] Figure 4 It is a schematic cross-sectional view of the upper half of the structure of the present invention;

[0025] Figure 5 It is a schematic cross-sectional view of the sliding frame structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the grinding assembly of the present invention;

[0027] Figure 7 This is a schematic cross-sectional view of the grinding disc structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the welding assembly of the present invention;

[0029] Fig. 9 It is a schematic cross-sectional view of the structure of the mobile support of the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the stabilizing component of the present invention.

[0031] The numbers in the figure represent:

[0032] 1. Base; 2. Current regulating device;

[0033] The clamping assembly includes: 31, slide rail; 32, fixed frame; 33, electric telescopic rod; 34, lower moving rod; 35, sliding frame; 36, clamping block; 37, motor; 38, driving gear; 39, driven gear; 310, rotating rod; 311, rotating circle; 312, lower half circle; 313, upper half circle; 314, lower clamping circle; 315, upper clamping circle; 316, moving block; 317, clamping rod; 318, relaxation spring; 319, tight spring;

[0034] The grinding assembly includes: 41, grinding motor; 42, fixed bottom block; 43, rotating frame; 44, driving roller; 45, transmission belt; 46, rotating roller; 47, grinding disc; 48, sliding rail; 49, grinding arc block; 410, close spring; 411, rotating handle;

[0035] The welding assembly includes: 51, a movable bracket; 52, a clamping roller; 53, an external welding gun; 54, an internal welding gun; 55, a fixed rod; 56, a connecting rod; 57, a fixed arc block; 58, an inclined fixed block;

[0036] The stabilizing component includes: 61, a fixing ring; 62, a diagonal rod; 63, a contact ball; 64, a supporting spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] refer to Figures 1 to 10 A sheet metal OTC argon arc welding machine according to a preferred embodiment of the present invention will be described in detail below.

[0039] A sheet metal OTC argon arc welding machine is used for welding thick-walled metal pipes, comprising a base 1 and a current regulating device 2, wherein an outer welding gun 53 and an inner welding gun 54 are connected to the current regulating device 2 through a pipe line, an argon gas bottle is fixedly connected to the outer side of the current regulating device 2 to provide argon gas therefor, a clamping assembly for fixing two sections of round pipes and driving the two sections of round pipes to rotate coaxially and at the same speed is arranged inside the base 1, and a welding assembly for welding the two sections of round pipes inside and outside is arranged inside the base 1.

[0040] The clamping assembly includes a slide rail 31 fixedly connected to the inside of the base 1, a fixed frame 32 fixedly connected to the top of the slide rail 31, an electric telescopic rod 33 fixedly connected to the inside of the base 1, two electric telescopic rods 33 are provided, a downward moving rod 34 is fixedly connected to the top of the electric telescopic rod 33, a sliding frame 35 is slidably connected to the inside of the slide rail 31, a handle is provided on the outside of the sliding frame 35, a clamping block 36 is slidably connected to the inside of the fixed frame 32, the clamping block 36 is T-shaped, and the clamping block 36 is slidably connected to the electric telescopic rod 33.

[0041] A motor 37 is fixedly connected to the outside of the base 1, and a driving gear 38 is fixedly connected to the output shaft of the motor 37. A driven gear 39 is rotatably connected to the outside of the fixed frame 32. A rotating rod 310 is fixedly connected to the outside of the driven gear 39. A convex strip is arranged on the outside of the rotating rod 310. A rotating circle 311 is rotatably connected to the top of the sliding frame 35. The convex strip is slidably connected to the rotating circle 311, and the rotating rod 310 is slidably connected to the rotating circle 311.

[0042] A lower half circle 312 is fixedly connected to the top of the sliding frame 35, and two lower half circles 312 are provided. A lower half circle 312 is provided on the top of the fixed frame 32, and a lower clamping circle 314 is slidably connected inside the lower half circle 312. A moving block 316 is slidably connected inside the sliding frame 35, and the moving block 316 is T-shaped. A clamping rod 317 is fixedly connected to the top of the moving block 316, and four clamping rods 317 are provided. An upper half circle 313 is fixedly connected to the top of the clamping rod 317, and an upper clamping circle 315 is slidably connected inside the upper half circle 313. The upper clamping circle 315 and the lower clamping circle 314 have the same shape. The same upper clamping circle 315 and lower clamping circle 314 are provided on the top of the fixed frame 32, and anti-slip grooves are provided inside the upper clamping circle 315 and the lower clamping circle 314. A relaxation spring 318 is fixedly connected to the top of the lower half circle 312, and four relaxation springs 318 are provided, and the relaxation spring 318 is fixedly connected to the upper half circle 313.

[0043] A clamping spring 319 is fixedly connected to the outer side of the sliding frame 35 , and the clamping spring 319 is fixedly connected to the sliding rail 31 .

[0044] A grinding assembly for grinding the pipe mouth circular surface and the outer side of two sections of round pipes is arranged inside the base 1, and the grinding assembly includes a grinding motor 41 fixedly connected to the top of the slide rail 31, a fixed bottom block 42 is fixedly connected to the top of the slide rail 31, a rotating frame 43 is rotatably connected to the top of the fixed bottom block 42, an output shaft of the grinding motor 41 is fixedly connected to an active roller 44, the active roller 44 is rotatably connected to the fixed bottom block 42, a transmission belt 45 is transmission-connected to the outer side of the active roller 44, a rotating roller 46 is rotatably connected to the top of the rotating frame 43, a grinding disc 47 is installed on the outer side of the rotating roller 46, the grinding disc 47 is symmetrically arranged with the rotating roller 46, and the two grinding discs 47 are arranged in parallel, a sliding rail 48 is fixedly connected to the outer side of the grinding disc 47, a grinding arc block 49 is slidably connected to the inside of the sliding rail 48, a close spring 410 is fixedly connected to the inside of the sliding rail 48, the close spring 410 is fixedly connected to the grinding arc block 49, and a rotating handle 411 is fixedly connected to the top of the rotating frame 43.

[0045] The welding assembly includes a mobile bracket 51 slidably connected to the inside of the slide rail 31, the mobile bracket 51 is rotatably connected with a clamping roller 52, four clamping rollers 52 are arranged on the outside of the mobile bracket 51, an external welding gun 53 is slidably connected to the inside of the mobile bracket 51, the external welding gun 53 is slidably connected to the clamping roller 52, the mobile bracket 51 is slidably connected with an internal welding gun 54, four clamping rollers 52 are arranged on the outside of the internal welding gun 54, a fixed rod 55 is slidably connected to the outside of the mobile bracket 51, a handle is arranged on the outside of the fixed rod 55, a connecting rod 56 is rotatably connected to the top of the fixed rod 55, a fixed arc block 57 is rotatably connected to the bottom of the connecting rod 56, an anti-slip groove is arranged on the side of the fixed arc block 57 close to the inner welding gun 54, the fixed arc block 57 is slidably connected to the mobile bracket 51, an inclined fixed block 58 is slidably connected to the inside of the mobile bracket 51, and the inclined fixed block 58 is arranged in two parts, one long and one short.

[0046] A stabilizing assembly for reducing vibration of the welding assembly is arranged inside the base 1, and the stabilizing assembly includes a fixing ring 61 fixedly connected to the outer side of the inner welding gun 54, an inclined rod 62 is rotatably connected to the outer side of the fixing ring 61, four inclined rods 62 are arranged, a contact ball 63 is rotatably connected to the bottom of the inclined rod 62, four contact balls 63 are arranged, a support spring 64 is fixedly connected to the outer side of the inclined rod 62, and the support spring 64 is fixedly connected to the fixing ring 61.

[0047] The following is the entire working process and working principle of the above embodiment: the user inserts the two sections of the round tube between the lower clamping ring 314 and the upper clamping ring 315 on the top of the sliding frame 35 and the fixed frame 32 respectively, so that the circular surfaces of the tube openings of the two sections of the round tube are located between the sliding frame 35 and the fixed frame 32, the user pulls the rotating handle 411 by hand, the rotating handle 411 drives the rotating frame 43 fixedly connected to it to rotate, the rotating frame 43 drives the rotating roller 46 rotatably connected to it to rotate, the rotating roller 46 drives the grinding disc 47 fixedly connected to it to move between the two sections of the round tube, the user pushes the two sections of the round tube to fit closely against the grinding disc 47, and at the same time the grinding disc 47 drives the grinding arc block 49 to fit closely against the outer side of the round tube, The polishing arc block 49 squeezes the close spring 410 to make the close spring 410 contract, and the user controls the electric telescopic rod 33 to contract, and the electric telescopic rod 33 drives the clamping block 36 fixedly connected thereto to move downward, and the electric telescopic rod 33 drives the lower moving rod 34 fixedly connected thereto to move downward, and the lower moving rod 34 drives the moving block 316 slidably connected thereto to move downward, and the moving block 316 drives the clamping rod 317 fixedly connected thereto to move downward, and the clamping rod 317 drives the upper half circle 313 fixedly connected thereto to move downward, and the upper half circle 313 squeezes the relaxation spring 318, and the upper half circle 313 drives the upper clamping ring 315 slidably connected thereto to move downward, and the upper clamping ring 315 and the lower clamping ring 314 clamps and fixes the round tube, and at the same time, the upper clamping ring 315 and the lower clamping ring 314 form a cylinder. The lower clamping ring 314 and the upper clamping ring 315 on the top of the fixing frame 32 also fix another round tube. The user turns on the grinding motor 41, and the output shaft of the grinding motor 41 drives the active roller 44 fixedly connected thereto to rotate, and the active roller 44 drives the transmission belt 45 connected thereto to rotate, and the transmission belt 45 drives the rotating roller 46 connected thereto to rotate, and the rotating roller 46 drives the grinding disc 47 fixed thereto to rotate, and the grinding disc 47 rotates to grind the circular surface of the pipe mouth of the two sections of the round tube close to each other, and at the same time, the grinding disc 47 drives the grinding arc block 49 to rotate, and the grinding arc block 49 rotates The outer sides of the circular surfaces of the two sections of the round tube close to the tube mouth are grinded to remove the oxide layer, electroplating layer, etc. of the circular tube, thereby achieving the effect of grinding the circular surfaces and outer sides of the tube mouths of the two sections of the round tube, that is, the burrs on the circular surfaces of the tube mouths close to the two sections of the round tube are grinded smooth, and the oxide layer, electroplating layer, etc. of the outer side to be welded are grinded away, thereby avoiding the influence of the oxide layer, electroplating layer, etc. on the welding quality. Compared with the traditional grinder, the two grinding discs 47 are arranged in parallel to make the grinding surfaces of the two sections of the round tube parallel, and the two sections of the round tube are grinded at the same time, so that the two sections of the round tube can be accurately connected, and the grinding disc 47 fits the round tube more closely to avoid excessive grinding and skewed grinding surface, and the grinding arc block 49 device fits the outer arc surface of the round tube more closely, so that the grinding surface is smoother.

[0048] Furthermore, the user pushes and rotates the handle 411 to move the grinding disc 47 away from the round tube, the user controls the electric telescopic rod 33 to extend, the electric telescopic rod 33 drives the lower moving rod 34 to move upward, the lower moving rod 34 drives the moving block 316 to make the clamping rod 317 move upward, the clamping rod 317 drives the upper half circle 313 to move upward and release the round tube, the user moves the handle on the outside of the sliding frame 35 to make the sliding frame 35 move away from the fixed frame 32, the sliding frame 35 pulls the clamping spring 319 to extend and store force, and at the same time the user moves the round tube to make the two sections of the round tube dock, the user controls the electric telescopic rod 33 to retract again, the upper clamping ring 315 and the lower clamping ring 314 clamp the fixed round tube again, the user releases the handle on the outside of the sliding frame 35 and clamps it tightly The spring 319 contracts and pulls the sliding frame 35 to move toward the fixed frame 32, and the fixed frame 32 drives the round tube to be close to another round tube. The user pushes the handle on the outside of the fixed rod 55, and the fixed rod 55 drives the movable bracket 51 to move toward the round tube, so that the inner welding gun 54 is inserted into the inside of the round tube. The user moves the outer welding gun 53 and the inner welding gun 54 so that the outer welding gun 53 is above the joint of the two sections of the round tube. The user presses down the handle on the outside of the fixed rod 55, and the fixed rod 55 drives the connecting rod 56 to deflect, and the connecting rod 56 pushes the fixed arc block 57 rotatably connected thereto to move toward the inner welding gun 54, and the fixed arc block 57 squeezes and fixes the inner welding gun 54. At the same time, the fixed rod 55 is inserted downward between the two parts of the inclined fixed block 58, and the bottom of the fixed rod 55 squeezes the inclined surface of the inclined fixed block 58 so that the inclined fixed block 5 The two parts of the motor 37 move on both sides in the 8 direction, and the inclined fixed block 58 squeezes the inner wall of the slide rail 31 to achieve the effect of fixing the inner welding gun 54, the outer welding gun 53 and the movable bracket 51, so as to prevent the inner welding gun 54, the outer welding gun 53 and the movable bracket 51 from moving and affecting the welding during welding. The user turns on the motor 37, and the output shaft of the motor 37 drives the driving gear 38 fixedly connected thereto to rotate, and the driving gear 38 and the driven gear 39 rotate, and the driven gear 39 drives the rotating rod 310 fixedly connected thereto to rotate, and the rotating rod 310 drives the rotating circle 311 to rotate, and the rotating circle 311 generates friction with the outer side of the lower clamping circle 314, and the rotating circle 311 drives the lower clamping circle 314 to rotate. Since the lower clamping circle 314 and the upper clamping circle 315 form a cylinder, the rotating circle 311 drives The lower clamping ring 314 and the upper clamping ring 315 rotate, and the lower clamping ring 314 and the upper clamping ring 315 drive the round tube to rotate. At the same time, the lower clamping ring 314 and the upper clamping ring 315 on the top of the fixed frame 32 drive the round tube to rotate, so that the two sections of the round tube rotate synchronously. The current regulating device 2 causes the outer welding gun 53 and the inner welding gun 54 to generate a high current and high temperature arc through the pipe line. The inner welding gun 54 welds the inside of the round tube, and the outer welding gun 53 welds the outside of the round tube. The outer welding gun 53 and the inner welding gun 54 are welded one above and one below at intervals, so that the joints of the two sections of the round tube are melted and welded. The argon gas bottle outside the current regulating device 2 provides argon gas for the current regulating device 2, and the current regulating device 2 transports the argon gas to the outer welding gun 53 and the inner welding gun 54 through the pipe line, and then under the protection of the argon gas,Preventing metal oxidation and the intrusion of other impurities, the effect of welding two sections of round tubes on the inside and outside is achieved. The two sections of round tubes rotate synchronously to cooperate with the outer welding gun 53 and the inner welding gun 54 to weld the inside and outside, reducing the possibility of gaps caused by the thick pipe wall from the outside welding, making the weld more solid and avoiding the situation where the weld is burst due to high temperature and high pressure.

[0049] Furthermore, the inner welding gun 54 drives the fixing ring 61 fixedly connected thereto to move into the interior of the circular tube, the supporting spring 64 contacts the inner wall of the circular tube and is squeezed, the supporting spring 64 drives the inclined rod 62 rotatably connected thereto to rotate, the inclined rod 62 squeezes the supporting spring 64, and the inner welding gun 54 continues to move toward the joint of the circular tubes. Since the device will inevitably vibrate, the inner welding gun 54 will vibrate. The four supporting springs 64 support the inner welding gun 54 in four directions of up, down, front and back, so that the inner welding gun 54 is fixed, thereby achieving the effect of reducing the vibration of the inner welding gun 54, reducing the unevenness of the welding joint caused by the irregular vibration of the inner welding gun 54, and improving the flatness of the welding joint.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sheet metal OTC argon arc welding machine for welding thick-walled metal pipes, comprising a base (1) and a current regulating device (2), characterized in that: A clamping assembly for fixing two sections of round tubes and driving the two sections of round tubes to rotate coaxially and at the same speed is arranged inside the base (1), and a welding assembly for welding the two sections of round tubes inside and outside is arranged inside the base (1).

2. A sheet metal OTC argon arc welding machine according to claim 1, characterized in that: The clamping assembly comprises a slide rail (31) fixedly connected to the inside of the base (1); a fixed frame (32) is fixedly connected to the top of the slide rail (31); an electric telescopic rod (33) is fixedly connected to the inside of the base (1); a downward moving rod (34) is fixedly connected to the top of the electric telescopic rod (33); a sliding frame (35) is slidably connected to the inside of the slide rail (31); a clamping block (36) is slidably connected to the inside of the fixed frame (32); and the clamping block (36) is slidably connected to the electric telescopic rod (33).

3. A sheet metal OTC argon arc welding machine according to claim 2, characterized in that: The outer side of the base (1) is fixedly connected to a motor (37), the output shaft of the motor (37) is fixedly connected to a driving gear (38), the outer side of the fixed frame (32) is rotatably connected to a driven gear (39), the outer side of the driven gear (39) is fixedly connected to a rotating rod (310), the top of the sliding frame (35) is rotatably connected to a rotating circle (311), and the rotating rod (310) is slidably connected to the rotating circle (311).

4. A sheet metal OTC argon arc welding machine according to claim 2, characterized in that: The top of the sliding frame (35) is fixedly connected with a lower half circle (312), the interior of the lower half circle (312) is slidably connected with a lower clamping circle (314), the interior of the sliding frame (35) is slidably connected with a moving block (316), the top of the moving block (316) is fixedly connected with a clamping rod (317), the top of the clamping rod (317) is fixedly connected with an upper half circle (313), the interior of the upper half circle (313) is slidably connected with an upper clamping circle (315), the top of the lower half circle (312) is fixedly connected with a relaxation spring (318), and the relaxation spring (318) is fixedly connected to the upper half circle (313).

5. The sheet metal OTC argon arc welding machine according to claim 2, characterized in that: A clamping spring (319) is fixedly connected to the outer side of the sliding frame (35), and the clamping spring (319) is fixedly connected to the sliding rail (31).

6. The sheet metal OTC argon arc welding machine according to claim 1, characterized in that: The base (1) is provided with a grinding assembly for grinding the pipe mouth round surface and the outer side of the two sections of round pipes. The grinding assembly comprises a grinding motor (41) fixedly connected to the top of the slide rail (31). The top of the slide rail (31) is fixedly connected to a fixed bottom block (42). The top of the fixed bottom block (42) is rotatably connected to a rotating frame (43). The output shaft of the grinding motor (41) is fixedly connected to a driving roller (44). The driving roller (44) is rotatably connected to the fixed bottom block (42). The outer side of the driving roller (44) is transmission-connected to A transmission belt (45) is provided, the top of the rotating frame (43) is rotatably connected to a rotating roller (46), a grinding disc (47) is installed on the outer side of the rotating roller (46), a sliding rail (48) is fixedly connected to the outer side of the grinding disc (47), a grinding arc block (49) is slidably connected inside the sliding rail (48), a close-fitting spring (410) is fixedly connected inside the sliding rail (48), the close-fitting spring (410) is fixedly connected to the grinding arc block (49), and a rotating handle (411) is fixedly connected to the top of the rotating frame (43).

7. The sheet metal OTC argon arc welding machine according to claim 2, characterized in that: The welding assembly comprises a movable bracket (51) slidably connected to the inside of the slide rail (31); a clamping roller (52) is rotatably connected to the inside of the movable bracket (51); an external welding gun (53) is slidably connected to the inside of the movable bracket (51); the external welding gun (53) is slidably connected to the clamping roller (52); an internal welding gun (54) is slidably connected to the inside of the movable bracket (51); a fixed rod (55) is slidably connected to the outside of the movable bracket (51); a connecting rod (56) is rotatably connected to the top of the fixed rod (55); a fixed arc block (57) is rotatably connected to the bottom of the connecting rod (56); the fixed arc block (57) is slidably connected to the movable bracket (51); and an inclined fixed block (58) is slidably connected to the inside of the movable bracket (51).

8. The sheet metal OTC argon arc welding machine according to claim 7, characterized in that: A stabilizing assembly for reducing vibration of the welding assembly is arranged inside the base (1), and the stabilizing assembly comprises a fixing ring (61) fixedly connected to the outside of the inner welding gun (54), an inclined rod (62) is rotatably connected to the outside of the fixing ring (61), a contact ball (63) is rotatably connected to the bottom of the inclined rod (62), a support spring (64) is fixedly connected to the outside of the inclined rod (62), and the support spring (64) is fixedly connected to the fixing ring (61).

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