An automatic welding machine for tubular steel

Abstract

This invention relates to the field of steel welding technology and discloses an automatic tubular steel welding machine, including a frame, side plates mounted on the surface of the frame, a support mounted on one side of the frame, a lifting cylinder mounted on the support, a welding gun holder mounted on the output end of the lifting cylinder, a welding gun body mounted on the welding gun holder, and multiple sets of support wheels provided on the surface of the frame. In this invention, by setting an auxiliary device, the steel pipes are first clamped by rotating components in two hollow cylinders and the steel pipes are controlled to rotate. The control unit in the processing component can control the moving arm, milling cutter one, and milling cutter two to move and extend into the hollow cylinder one, so that the welding ends and surfaces of the two steel pipes to be welded can be ground simultaneously. This ensures that the surface grinding range and end face flatness of the two steel pipes are consistent, ensuring that the welding ends of the two steel pipes are accurately aligned during welding, reducing problems such as uneven welding and poor fusion caused by grinding deviations, and improving the welding quality.

Description

Technical Field

[0001] This invention relates to the field of steel welding technology, specifically to an automatic tubular steel welding machine. Background Technology

[0002] Tubular steel is a long strip of steel with a hollow cross-section. According to the material, it can be divided into carbon steel pipe, alloy steel pipe, stainless steel pipe, etc. According to the forming method, it can be seamless pipe (hot rolled, cold rolled) and welded pipe (straight seam welded, spiral welded). Its cross-section is mostly circular, but there are also square, rectangular and other irregular shapes. It has the characteristics of high strength, light weight and large moment of inertia of cross section. It is widely used in building structure (scaffolding, support column), fluid transportation (oil and natural gas pipeline), machinery manufacturing (drive shaft, hydraulic cylinder) and other fields. It can be adapted to different scenarios through cutting, bending and other processing, combining functionality and economy.

[0003] In the processing or splicing of tubular steel, automatic welding machines are often used. Before welding existing tubular steel pipes, the end face (pipe edge) and surface (outer / inner circle near the pipe opening) of the welding end need to be ground to remove impurities such as oxide scale, rust, and oil stains to ensure the fusion quality during welding. However, in the current grinding process, the two steel pipes to be welded are usually ground separately. Due to the inconsistency of grinding parameters (such as force and depth) between the two steel pipes, there will be significant differences in the grinding effect (such as one steel pipe being ground too deeply and the other being ground too shallowly, resulting in gaps or steps in the welding area). When welding, this will cause uneven distribution of weld beads and insufficient fusion, seriously affecting the strength and quality of the weld.

[0004] Therefore, we propose an automatic welding machine for tubular steel. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an automatic tubular steel welding machine, which solves the problem that in existing methods, inconsistent grinding parameters (such as force and depth) between two steel pipes lead to significant differences in grinding effects, resulting in uneven weld distribution and insufficient fusion during welding, which seriously affects the strength and quality of the weld.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automatic tubular steel welding machine, comprising a frame, side plates mounted on the surface of the frame, a support mounted on one side of the frame, a lifting cylinder mounted on the support, a welding torch holder mounted on the output end of the lifting cylinder, a welding torch body mounted on the welding torch holder, multiple sets of support wheels provided on the surface of the frame, each set containing two support wheels, and auxiliary devices provided on the surface of the frame;

[0009] The auxiliary device includes multiple sets of adjusting cylinders installed in the inner wall of the frame. The output end of the adjusting cylinder is fixedly connected to a base frame. Two hollow cylinders, Hollow Cylinder 1 and Hollow Cylinder 2, are respectively installed on the base frame. A processing component is provided on the base frame. The processing component includes two sliding rods slidably connected to the inner wall of the base frame. A hollow sleeve is fixedly connected to the upper end of the sliding rod. Two moving arms are slidably connected to the inner wall of the hollow sleeve. A tool holder is installed on the moving arm. A milling cutter 1 and a milling cutter 2 are installed on the tool holder. A through hole is opened on the surface of Hollow Cylinder 1 for the moving arm to insert. A control unit is provided on the hollow sleeve for controlling the milling cutter 1 and milling cutter 2 to process the steel pipe.

[0010] The surface of the first hollow cylinder is also provided with a positioning component for positioning the steel pipe. The inner wall of the second hollow cylinder is provided with a rotating component, which includes a rotating sleeve rotatably connected to the inner wall of the second hollow cylinder. A clamping part is provided between the second hollow cylinder and the rotating sleeve for clamping the steel pipe. A driving part is also provided on the base frame for controlling the synchronous rotation of the two sets of rotating sleeves. The surface of the support is also provided with a pressing component.

[0011] Preferably, the control unit includes a lifting cylinder mounted on the base frame. The output end of the lifting cylinder is fixedly connected to the surface of the hollow sleeve. A bidirectional screw is rotatably connected to the inner wall of the hollow sleeve. The bidirectional screw is threadedly connected to the inner walls of two moving arms respectively. A bevel gear one is fixedly connected to the surface of the bidirectional screw. A shaft is rotatably connected to the inner wall of the hollow sleeve. A bevel gear two and a gear ring are fixedly connected to the surface of the shaft respectively. The bevel gear two meshes with the bevel gear one. A push cylinder is fixedly connected to the upper surface of the hollow sleeve. A rack is fixedly connected to the output end of the cylinder. The rack meshes with a gear ring. Through the above components, during operation, the lifting cylinder can drive the hollow sleeve and the moving arm to move upward. When the milling cutter one contacts the surface of the steel pipe, it performs surface grinding and controls the surface grinding size. The pushing cylinder can drive the rack to move. The rack, in conjunction with the gear ring, can drive the shaft and bevel gear two to rotate. The bevel gear two, in conjunction with the bevel gear one, can drive the bidirectional screw to rotate, thereby controlling the movement of the moving arm, allowing the milling cutter two to contact the end face of the steel pipe, and controlling the end face grinding size.

[0012] Preferably, a guide rod is fixedly connected to one side surface of the hollow sleeve, and a guide hole is opened on the surface of the rack. The guide rod is inserted into the inner wall of the guide hole. Through the above components, when the rack moves, the guide rod can move in the guide hole to achieve the guiding function.

[0013] Preferably, the clamping part includes multiple sets of push rods slidably connected to the inner wall of the rotating sleeve. One end of each push rod is fixedly connected to a main clamping block. A spring is sleeved on the surface of each push rod, and both ends of the spring are fixedly connected to the push rod and the inner wall of the rotating sleeve, respectively. Two guide rails are fixedly connected to the surface of the hollow cylinder, and a compression sleeve is slidably connected to the guide rails. Two compression cylinders are installed on the surface of the compression sleeve, and the output end of the compression cylinder is fixedly connected to the surface of the hollow cylinder. Through the above components, when clamping, the compression cylinder is opened, and the compression cylinder drives the compression sleeve to move. The compression sleeve compresses multiple push rods. As the push rods move, the springs are stressed, and the push rods cooperate with the main clamping block to clamp the steel pipe.

[0014] Preferably, an extension plate is fixedly connected to the surface of the top rod, and a plurality of equally spaced auxiliary clamping blocks are fixedly connected to the surface of the extension plate. Through the above components, when the top rod moves, it can drive the extension plate to move, and the extension plate drives the multiple auxiliary clamping blocks to clamp the surface of the steel pipe, thereby improving the clamping stability.

[0015] Preferably, the push rod includes a rod body and a ball bearing. The ball bearing is rolled at the upper end of the rod body. Through the above components, when the extrusion sleeve is pressed against the push rod, the extrusion sleeve contacts the ball bearing in the push rod, and the ball bearing rolls, which can reduce friction and ensure operational stability.

[0016] Preferably, the drive unit includes a transmission shaft rotatably connected to the inner wall of the base frame. A synchronous belt is installed between the transmission shaft and the rotating sleeve. A drive motor is installed on the surface of the base frame. The output end of the drive motor is fixedly connected to one end of the transmission shaft. Through the above components, when the steel pipe is clamped, the drive motor is turned on, and the drive motor drives the transmission shaft to rotate. The transmission shaft drives the two rotating sleeves to rotate synchronously through the synchronous belt, thereby driving the steel pipe to rotate for grinding.

[0017] Preferably, the pressing assembly includes two sets of mounting seats mounted on the surface of the bracket. A pressing cylinder is mounted on the surface of the mounting seat. A pressing wheel is fixedly connected to the output end of the pressing cylinder. Through the above components, during the welding process, the pressing cylinder can drive the pressing wheel to move. The pressing wheel, in conjunction with the support wheel, can limit the position of the steel pipe and ensure the stability of the welding process.

[0018] Preferably, the positioning component includes a mounting bracket fixed to the surface of the hollow sleeve, a positioning cylinder mounted on the surface of the mounting bracket, a stop rod fixedly connected to the output end of the positioning cylinder, and a circular hole for the stop rod to pass through on the surface of the hollow sleeve. Through the above components, during the welding process, the positioning cylinder can drive the stop rod to extend into the hollow cylinder. After the steel pipe moves into the hollow cylinder, the stop rod can play a positioning role.

[0019] Preferably, the blocking surface of the stop bar is a plane.

[0020] In summary, the technical effects and advantages of this invention are as follows:

[0021] 1. In this invention, by setting an auxiliary device, the steel pipes are first clamped by the rotating components in the two hollow cylinders 2, and the steel pipes are controlled to rotate. The control unit in the processing component can control the moving arm, milling cutter 1 and milling cutter 2 to move and extend into the hollow cylinder 1. The welding ends and surfaces of the two steel pipes to be welded can be ground at the same time. This ensures that the grinding range and end face flatness of the two steel pipes are consistent, and ensures that the welding ends of the two steel pipes are accurately aligned during welding. This reduces problems such as uneven welding and poor fusion caused by grinding deviation, and improves the welding quality.

[0022] 2. In this invention, by setting a rotating component, the clamping part drives the extrusion sleeve to move through the extrusion cylinder, extruding multiple sets of top rods and clamping blocks to achieve tight clamping of the outer wall of the steel pipe. The auxiliary clamping block moves synchronously with the extension plate to assist in fixing from the side, forming a multi-contact limit. Then, the driving part drives the transmission shaft through the drive motor to control the two rotating sleeves to drive the steel pipe to rotate synchronously.

[0023] 3. In this invention, the push rod is composed of a rod body and a ball bearing. The ball bearing design reduces the friction between the extrusion sleeve and the push rod, thereby improving the overall service life.

[0024] 4. In this invention, the adjusting cylinder can drive the base frame and hollow cylinder one and hollow cylinder two to adjust their positions, which is convenient to adapt to steel pipes of different sizes and improves the overall applicability.

[0025] 5. In this invention, the positioning part extends into the hollow cylinder through the positioning cylinder driven by the stop rod, providing a unified axial positioning reference for the steel pipe, ensuring that the two steel pipes are located in the same position in the two hollow cylinders, and further improving the grinding accuracy. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an automatic tubular steel welding machine according to the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of an automatic tubular steel welding machine according to the present invention;

[0028] Figure 3 This is a schematic diagram of the auxiliary device structure of an automatic tubular steel welding machine according to the present invention;

[0029] Figure 4 This is a schematic diagram of the auxiliary device of the automatic tubular steel welding machine of the present invention from another perspective.

[0030] Figure 5 This is a schematic diagram of the processing component structure of an automatic tubular steel welding machine according to the present invention;

[0031] Figure 6 This is a cross-sectional view of the processing components of an automatic tubular steel welding machine according to the present invention.

[0032] Figure 7 This is a schematic diagram of the hollow sleeve structure of an automatic tubular steel welding machine according to the present invention;

[0033] Figure 8 This is a cross-sectional view of the rotating component of an automatic tubular steel welding machine according to the present invention.

[0034] Figure 9 This is an exploded structural diagram of the rotating component of an automatic tubular steel welding machine according to the present invention.

[0035] In the diagram: 1. Frame; 2. Side plate; 3. Welding torch holder; 4. Lifting cylinder; 5. Welding torch body; 6. Pressing assembly; 61. Mounting base; 62. Pressing cylinder; 63. Pressing roller; 7. Auxiliary device; 71. Adjusting cylinder; 72. Hollow cylinder one; 73. Hollow cylinder two; 74. Processing assembly; 741. Hollow sleeve; 742. Moving arm; 743. Tool holder; 744. Milling cutter one; 745. Milling cutter two; 746. Slide rod; 747. Double-acting screw; 748. Bevel gear one; 749. Shaft; 7410. Bevel gear two; 7411. Gear ring; 7412. Push cylinder; 7413. Gear 7414. Guide rod; 7415. Lifting cylinder; 75. Rotating assembly; 751. Rotating sleeve; 752. Top rod; 7521. Rod body; 7522. Ball bearing; 753. Spring; 754. Main clamping block; 755. Extension plate; 756. Secondary clamping block; 757. Extrusion sleeve; 758. Extrusion cylinder; 759. Guide rail; 7510. Drive shaft; 7511. Drive motor; 7512. Synchronous belt; 76. Positioning assembly; 761. Mounting bracket; 762. Positioning cylinder; 763. Stop bar; 764. Flat surface; 77. Through hole; 78. Base frame; 8. Bracket; 9. Support wheel. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] refer to Figure 1 - Figure 9 The automatic tubular steel welding machine shown includes a frame 1, a side plate 2 installed on the surface of the frame 1, a bracket 8 installed on one side of the frame 1, a lifting cylinder 4 installed on the bracket 8, a welding gun holder 3 installed at the output end of the lifting cylinder 4, a welding gun body 5 installed on the welding gun holder 3, multiple sets of support wheels 9 are provided on the surface of the frame 1, each set of support wheels 9 has two, and an auxiliary device 7 is provided on the surface of the frame 1.

[0038] The auxiliary device 7 includes multiple sets of adjusting cylinders 71 installed in the inner wall of the frame 1. The output end of the adjusting cylinders 71 is fixedly connected to a base frame 78. Two hollow cylinders 72 and 73 are respectively installed on the base frame 78. A processing component 74 is provided on the base frame 78. The processing component 74 includes two slide rods 746 slidably connected to the inner wall of the base frame 78. A hollow sleeve 741 is fixedly connected to the upper end of the slide rods 746. Two moving arms 742 are slidably connected to the inner wall of the hollow sleeve 741. A tool holder 743 is installed on the moving arm 742. A milling cutter 744 and a milling cutter 745 are installed on the tool holder 743. The surface of the hollow cylinder 72 is open. The device includes a through hole 77 for inserting a movable arm 742, a control unit on a hollow sleeve 741 for controlling milling cutter 744 and milling cutter 745 to process the steel pipe, a positioning component 76 on the surface of hollow cylinder 72 for positioning the steel pipe, a rotating component 75 on the inner wall of hollow cylinder 73, the rotating component 75 including a rotating sleeve 751 rotatably connected to the inner wall of hollow cylinder 73, a clamping part between hollow cylinder 73 and rotating sleeve 751 for clamping the steel pipe, a drive unit on a base frame 78 for controlling the synchronous rotation of the two sets of rotating sleeves 751, and a pressing component 6 on the surface of the support 8.

[0039] The control unit includes a lifting cylinder 7415 mounted on a base frame 78. The output end of the lifting cylinder 7415 is fixedly connected to the surface of a hollow sleeve 741. A double-acting screw 747 is rotatably connected to the inner wall of the hollow sleeve 741. The double-acting screw 747 is threadedly connected to the inner walls of two moving arms 742. A bevel gear 748 is fixedly connected to the surface of the double-acting screw 747. A shaft 749 is rotatably connected to the inner wall of the hollow sleeve 741. The surface of the shaft 749 is fixedly connected to... The bevel gear 7410 and the gear ring 7411 are connected. The bevel gear 7410 meshes with the bevel gear 748. A push cylinder 7412 is fixedly connected to the upper surface of the hollow sleeve 741. A rack 7413 is fixedly connected to the output end of the push cylinder 7412. The rack 7413 meshes with the gear ring 7411. A guide rod 7414 is fixedly connected to one side surface of the hollow sleeve 741. A guide hole is opened on the surface of the rack 7413. The guide rod 7414 is inserted into the inner wall of the guide hole.

[0040] In this implementation scheme: During operation, the lifting cylinder 7415 can drive the hollow sleeve 741 and the moving arm 742 to move upward. When the milling cutter 744 contacts the surface of the steel pipe, the surface is ground. The grinding size is controlled. The cylinder 7412 can drive the rack 7413 to move. The guide rod 7414 can move in the guide hole to achieve the guiding function. The rack 7413, together with the gear ring 7411, can drive the shaft 749 and the bevel gear 7410 to rotate. The bevel gear 7410, together with the bevel gear 748, can drive the double screw 747 to rotate, thereby controlling the movement of the moving arm 742, so that the milling cutter 745 contacts the end face of the steel pipe and controls the grinding size of the end face.

[0041] The clamping part includes multiple sets of push rods 752 that are slidably connected to the inner wall of the rotating sleeve 751. One end of the push rod 752 is fixedly connected to a main clamping block 754. A spring 753 is sleeved on the surface of the push rod 752. The two ends of the spring 753 are fixedly connected to the inner wall of the push rod 752 and the rotating sleeve 751, respectively. Two guide rails 759 are fixedly connected to the surface of the hollow cylinder 73. A compression sleeve 757 is slidably connected to the guide rails 759. Two compression cylinders 758 are installed on the surface of the compression sleeve 757. The output end of the compression cylinder 758 is fixedly connected to the surface of the hollow cylinder 73. An extension plate 755 is fixedly connected to the surface of the push rod 752. Multiple secondary clamping blocks 756 are fixedly connected to the surface of the extension plate 755. The push rod 752 includes a rod body 7521 and a ball 7522. The ball 7522 is slidably disposed on the upper end of the rod body 7521.

[0042] In this implementation scheme: During clamping, the extrusion cylinder 758 is opened, and the extrusion cylinder 758 drives the extrusion sleeve 757 to move. The extrusion sleeve 757 extrudes multiple push rods 752. When the extrusion sleeve 757 extrudes the push rods 752, the extrusion sleeve 757 contacts the rolling ball 7522 in the push rod 752. The rolling ball 7522 rolls, which can reduce friction. The push rod 752 moves, and the spring 753 is stressed. The push rod 752 cooperates with the main clamping block 754 to clamp the steel pipe. When the push rod 752 moves, it can drive the extension plate 755 to move. The extension plate 755 drives multiple auxiliary clamping blocks 756 to clamp on the surface of the steel pipe, thereby improving the clamping stability.

[0043] The drive unit includes a drive shaft 7510 that is rotatably connected to the inner wall of the base frame 78. A synchronous belt 7512 is installed between the drive shaft 7510 and the rotating sleeve 751. A drive motor 7511 is installed on the surface of the base frame 78. The output end of the drive motor 7511 is fixedly connected to one end of the drive shaft 7510.

[0044] In this implementation scheme: after the steel pipe is clamped, the drive motor 7511 is turned on, and the drive motor 7511 drives the transmission shaft 7510 to rotate. The transmission shaft 7510 drives the two rotating sleeves 751 to rotate synchronously through the synchronous belt 7512, which in turn drives the steel pipe to rotate for grinding.

[0045] The pressing component 6 includes two sets of mounting seats 61 mounted on the surface of the bracket 8. A pressing cylinder 62 is mounted on the surface of the mounting seat 61, and a pressing wheel 63 is fixedly connected to the output end of the pressing cylinder 62.

[0046] In this implementation scheme: During the welding process, the pressure cylinder 62 can drive the pressure roller 63 to move. The pressure roller 63, together with the support roller 9, can limit the position of the steel pipe and ensure the stability of the welding process.

[0047] The positioning component 76 includes a mounting bracket 761 fixed on the surface of the hollow sleeve 741. A positioning cylinder 762 is mounted on the surface of the mounting bracket 761. A stop rod 763 is fixedly connected to the output end of the positioning cylinder 762. A circular hole is opened on the surface of the hollow sleeve 741 for the stop rod 763 to pass through. The blocking surface of the stop rod 763 is a plane 764.

[0048] In this embodiment: During welding, the positioning cylinder 762 can drive the stop rod 763 to extend into the hollow cylinder 72. After the steel pipe moves into the hollow cylinder 72, the flat surface 764 of the stop rod 763 contacts the steel pipe, which plays a positioning role.

[0049] Working principle of this invention: When welding two sets of steel pipes, firstly, adjust the positions of hollow cylinder one 72 and hollow cylinder two 73 according to the size of the steel pipes. Open the adjusting cylinder 71, which drives the base frame 78 to move, adjusting the positions of hollow cylinder one 72 and hollow cylinder two 73. After adjustment, the steel pipes can be placed on the support wheels 9 in the frame 1. Push the two steel pipes in sequence, and the two sets of steel pipes pass through hollow cylinder two 73 and hollow cylinder one 72 in sequence. When inserted into a certain position in hollow cylinder one 72, the plane 764 on the surface of the stop rod 763 contacts the steel pipe, positioning the steel pipe. After positioning, open the extrusion cylinder 758, which drives the extrusion sleeve 757 to move. The extrusion sleeve 757 extrudes multiple push rods 752. 7. When the extrusion rod 752 is pressed, the extrusion sleeve 757 contacts the ball 7522 in the extrusion rod 752. The ball 7522 rolls, which can reduce friction. The extrusion rod 752 moves, the spring 753 is stressed, and the extrusion rod 752 cooperates with the main clamping block 754 to clamp the steel pipe. When the extrusion rod 752 moves, it can drive the extension plate 755 to move. The extension plate 755 drives multiple auxiliary clamping blocks 756 to clamp on the surface of the steel pipe, improving the clamping stability. After clamping, the positioning cylinder 762 drives the stop rod 763 to reset. At this time, the drive motor 7511 is turned on. The drive motor 7511 drives the transmission shaft 7510 to rotate. The transmission shaft 7510 drives the two rotating sleeves 751 to rotate synchronously through the synchronous belt 7512, which respectively drive the steel pipe to rotate.

[0050] During grinding, the lifting cylinder 7415 is activated, causing the hollow sleeve 741 and the moving arm 742 to move upwards, allowing both sets of milling cutters 744 to simultaneously contact the surface of the steel pipe. As the steel pipe rotates, the milling cutters 744 can grind the surface, ensuring consistent grinding dimensions on both pipes. When end-face grinding is required, the pushing cylinder 7412 is activated, causing the rack 7413 to move. The guide rod 7414 can move within the guide hole, providing guidance. The rack 7413, in conjunction with the gear ring 7411, drives the shaft 749 and the bevel gear 7410 to rotate. The bevel gear 7410 is equipped with... The bevel gear 748 drives the bidirectional screw 747 to rotate, thereby controlling the movement of the moving arm 742, allowing the milling cutter 745 to contact the end face of the steel pipe, and controlling the end face grinding size to ensure that the grinding of the two steel pipes at the weld is consistent. After grinding, the clamping part is released, and the steel pipe is pushed to align the weld ends of the two steel pipes. After alignment, the clamping part continues to clamp. In addition, the downward pressure cylinder 62 can drive the downward pressure wheel 63 to move. The downward pressure wheel 63, together with the support wheel 9, can limit the position of the steel pipe to ensure the stability of the welding. The lifting cylinder 4 can adjust the position of the welding torch body 5, and then the drive unit drives the steel pipe to rotate, so that the welding torch body 5 can realize the welding operation.

[0051] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tubular steel automatic welding machine comprising a frame (1), characterized in that: The surface of the frame (1) is provided with side plates (2), one side of the frame (1) is provided with a support (8), the support (8) is provided with a lifting cylinder (4), the output end of the lifting cylinder (4) is provided with a welding gun holder (3), the welding gun holder (3) is provided with a welding gun body (5), the surface of the frame (1) is provided with a plurality of groups of supporting wheels (9), the number of each group of supporting wheels (9) is two, and the surface of the frame (1) is provided with an auxiliary device (7); The auxiliary device (7) comprises a plurality of adjusting cylinders (71) mounted in the inner wall of the frame (1), the output end of the adjusting cylinder (71) is fixedly connected with a bottom frame (78), the bottom frame (78) is provided with two hollow barrels (72) and hollow barrels (73), respectively, a processing assembly (74) is arranged on the bottom frame (78), the processing assembly (74) comprises two slide rods (746) which are in sliding connection with the inner wall of the bottom frame (78), the upper end of the slide rod (746) is fixedly connected with a hollow sleeve (741), the inner wall of the hollow sleeve (741) is in sliding connection with two moving arms (742), the moving arms (742) are provided with a tool holder (743), the tool holder (743) is provided with a milling cutter (744) and a milling cutter (745), the surface of the hollow barrel (72) is provided with a perforation (77) for inserting the moving arm (742), and the hollow sleeve (741) is provided with a control part for controlling the milling cutter (744) and the milling cutter (745) to process the steel pipe; The surface of the hollow barrel (72) is also provided with a positioning assembly (76) for positioning the steel pipe, the inner wall of the hollow barrel (73) is provided with a rotating assembly (75) for clamping and rotating the steel pipe, and the surface of the support is also provided with a pressing assembly (6); The control part comprises a jacking cylinder (7415) mounted on the bottom frame (78), the output end of the jacking cylinder (7415) is fixedly connected with the surface of the hollow sleeve (741), the inner wall of the hollow sleeve (741) is rotatably connected with a bidirectional screw rod (747), the bidirectional screw rod (747) is in threaded connection with the inner walls of the two moving arms (742), respectively, the surface of the bidirectional screw rod (747) is fixedly connected with a bevel gear (748), the inner wall of the hollow sleeve (741) is rotatably connected with a shaft rod (749), the surface of the shaft rod (749) is fixedly connected with a bevel gear (7410) and a gear ring (7411), respectively, the bevel gear (7410) is in meshing connection with the bevel gear (748), the upper surface of the hollow sleeve (741) is fixedly connected with a push cylinder (7412), the output end of the push cylinder (7412) is fixedly connected with a rack (7413), and the rack (7413) is in meshing connection with the gear ring (7411). The positioning assembly (76) comprises a mounting frame (761) fixed on the surface of the hollow sleeve (741), a positioning cylinder (762) is mounted on the surface of the mounting frame (761), a stop rod (763) is fixedly connected to the output end of the positioning cylinder (762), and a circular hole is formed in the surface of the hollow sleeve (741) and used for the stop rod (763) to pass through.

2. A pipe steel automatic welding machine according to claim 1, characterized in that: One side surface of the hollow sleeve (741) is fixedly connected with a guide rod (7414), and a guide hole is formed in the surface of the rack (7413); the guide rod (7414) is inserted into the inner wall of the guide hole.

3. The automatic tube steel welding machine according to claim 1, characterized in that: The rotating assembly (75) comprises a rotating sleeve (751) rotationally connected with the inner wall of the hollow cylinder two (73), a clamping portion is arranged between the hollow cylinder two (73) and the rotating sleeve (751) and used for clamping the steel pipe, a driving portion is further arranged on the base frame (78) and used for controlling the synchronous rotation of the two groups of rotating sleeves (751), the clamping portion comprises a plurality of top rods (752) in sliding connection with the inner wall of the rotating sleeve (751), one end of each top rod (752) is fixedly connected with a main clamping block (754), a spring (753) is sleeved on the surface of the top rod (752), and both ends of the spring (753) are fixedly connected with the inner wall of the rotating sleeve (751) and the top rod (752), respectively, two guide rails (759) are fixedly connected to the surface of the hollow cylinder two (73), an extrusion sleeve (757) is in sliding connection with the guide rails (759), two extrusion cylinders (758) are mounted on the surface of the extrusion sleeve (757), and the output end of the extrusion cylinder (758) is fixedly connected with the surface of the hollow cylinder two (73).

4. A pipe steel automatic welding machine according to claim 3, characterized in that: The surface of the top rod (752) is fixedly connected with an extension plate (755), and the surface of the extension plate (755) is fixedly connected with a plurality of sub-clamping blocks (756) arranged at equal intervals.

5. A pipe steel automatic welding machine according to claim 4, characterized in that: The top rod (752) comprises a rod body (7521) and a rolling ball (7522), and the rolling ball (7522) is rolling arranged at the upper end of the rod body (7521).

6. A pipe steel automatic welding machine according to claim 5, characterized in that: The driving portion comprises a transmission shaft (7510) rotationally connected with the inner wall of the base frame (78), a synchronous belt (7512) is mounted between the transmission shaft (7510) and the rotating sleeve (751), a driving motor (7511) is mounted on the surface of the base frame (78), and the output end of the driving motor (7511) is fixedly connected with one end of the transmission shaft (7510).

7. The automatic tube steel welding machine according to claim 1, characterized in that: The pressing assembly (6) comprises two groups of mounting seats (61) mounted on the surface of the support (8), a pressing cylinder (62) is mounted on the surface of the mounting seat (61), and the output end of the pressing cylinder (62) is fixedly connected with a pressing wheel (63).

8. The automatic tube steel welding machine according to claim 1, characterized in that: The blocking surface of the stop rod (763) is a plane (764).

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