Automatic welding forming device for butt joint machining of special gas cylinder end socket

Abstract

The invention discloses an automatic welding forming device for butt joint processing of special gas cylinder end sockets, which comprises an end socket assembly table and a tank assembly table, a plasma arc welding machine head is arranged on the welding machine assembly table, and a support frame group is arranged on the front side of the plasma arc welding machine head. And the supporting frame set is used for supporting the part, before being welded by the plasma arc welding machine head, of the welding seam and comprises a main cross beam, a bidirectional supporting frame is arranged at the bottom of the main cross beam, and a distance measuring device is arranged at the bottom of the shaft rod. The invention relates to the technical field of gas cylinder end socket welding, and aims to effectively prevent shrinkage deformation caused by thermal stress, keep the integrity and dimensional precision of a gas cylinder structure, effectively control the width and deformation of a welding seam, ensure accurate butt joint of an end socket and a tank body and prevent the condition that the horizontal plane is inclined after the end socket is welded on the tank body. And meanwhile, the problems of end socket inclination and welding skips caused by welding seam deformation are avoided, and the sealing performance and the use safety of the gas cylinder are improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas cylinder head welding, in particular to an automatic welding and forming device for butt-jointing processing of special gas cylinder heads. Background Art

[0002] In the field of large-scale special gas cylinder manufacturing, the gas cylinder is usually composed of two parts: the bottle body and the head. During the processing stage, these two parts are connected into a whole through welding technology. For small-diameter gas cylinders, the welding process is relatively simple. At the weld seam, only a few welding points need to be welded for fixation, and then welding can be carried out directly. Due to the small diameter and short weld bead, the thermal deformation after welding is almost negligible, so it will not have a significant impact on the overall structure of the gas cylinder.

[0003] However, the problem is particularly prominent during the welding process of the heads of large gas cylinders. The diameter of large gas cylinders is large, resulting in longer welds. During the welding process, the weld at the connection between the head and the tank body will be affected by thermal stress, resulting in deformation. This deformation is mainly reflected in the shrinkage phenomenon after welding, that is, the weld will shrink, causing the weld in the unwelded area to become wider. This deformation will not only cause the head to tilt slightly after welding, but also seriously affect the subsequent welding quality and increase the risk of welding leaks. In addition, the inclination of the head will also affect the sealing performance and safety of the gas cylinder. Therefore, during the welding process of the head of large gas cylinders, how to control the deformation of the weld and improve the welding quality has become an urgent problem to be solved. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic welding and forming device for special gas cylinder head butt processing, which solves the problem that the weld shrinks during the welding process of the existing large gas cylinder heads, causing the head to tilt and increasing the risk of welding leaks.

[0005] To achieve the above-mentioned object, the present invention is implemented through the following technical scheme: an automatic welding and forming device for butt-jointing processing of special gas cylinder heads, comprising a head assembly platform and a tank body assembly platform, the head assembly platform is provided with a head, the tank body assembly platform is provided with a tank body, the head and the tank body are butt-jointed to form a weld; a welding machine moving platform is provided on one side of the tank body assembly platform, a welding machine assembly platform is provided on the welding machine moving platform, a plasma arc welding head is provided on the welding machine assembly platform, and a support frame group is provided on the front side of the plasma arc welding head to support the part of the weld before being welded by the plasma arc welding head;

[0006] The support frame group includes a main crossbeam, a shaft rod is arranged at the bottom of the middle part of the main crossbeam, a side platform body is arranged at one end of the main crossbeam, a sleeve body is arranged in the side platform body, and the plasma arc welding head passes through the sleeve body;

[0007] A polished rod is fixed on the top of the main crossbeam, and sliders are slidably connected on both sides of the polished rod. The two sliders are driven by a bidirectional hydraulic cylinder to slide on the polished rod; vertical beams are arranged at the bottom of the two sliders, and plug plates are arranged at the bottom of the vertical beams;

[0008] A bidirectional support frame is arranged at the bottom of the main crossbeam, and the bidirectional support frame includes a first support frame and a second support frame arranged in an X shape, and the middle parts of the first support frame and the second support frame are rotatably connected to the shaft rod; the ends of the first support frame and the second support frame are rotatably connected to the first support plate and the second support plate, respectively, and the inner sides of the first support plate and the second support plate are formed with slots for inserting the plug plate, and the bottoms of the first support plate and the second support plate are both provided with support feet, and the support feet are provided with ball bearings, and the ball bearings abut against the wall surface of the weld; wherein, when the two sliding blocks move relative to each other, the plug plate moves in the slot, presses against the first support plate and the second support plate to stretch them to both sides, so that the ball bearings on the two relatively described support feet support the weld.

[0009] Preferably, the inner wall surfaces of the first supporting plate and the second supporting plate are both inclined surfaces, and the two side surfaces of the inserting plate are cut surfaces matching the inclined surfaces.

[0010] Preferably, an inner groove is formed in the inclined surface in the length direction of the first supporting foot plate and the second supporting foot plate, and guide balls embedded in the inner groove are provided at both ends of the insert plate.

[0011] Preferably, a distance measuring device is provided at the bottom of the shaft, and the distance measuring device comprises:

[0012] A shell body is fixed at the bottom of the shaft rod, the two sides of the shell body are open cavities, and the upper and lower ends of the shell body are provided with guide rods;

[0013] A distance measuring sensor is fixed at the inner center of the housing;

[0014] Inner panels are arranged on both sides of the shell, and the guide rods penetrate the inner panels at both ends; the outer side of the inner panels is connected to the outer panels via connecting columns;

[0015] A spring, which is sleeved on the guide rod, and has two ends respectively abutting against the shell and the inner panel;

[0016] The transverse roller is rotatably connected to the bottom of the outer plate, and the outer edge of the transverse roller extends out of the openings on both sides of the shell.

[0017] Preferably, one end of the main beam away from the side platform body is rotatably connected to a paddle, and a contact sensor is arranged on the wall surface of the main beam; wherein, when the paddle collides with an obstacle, it rotates around the main beam transfer point as the axis and contacts the contact sensor.

[0018] Preferably, the upper width of the inclined surface of the inner wall surface of the first supporting plate and the second supporting plate is a, and the lower width is b, wherein a>b.

[0019] Preferably, open slots are formed on both sides of the main cross beam, and the vertical beams pass through the open slots.

[0020] Preferably, a frame is fixed on the top of the main crossbeam, an electric telescopic rod is fixed on the top of the frame, the electric telescopic rod is fixed on a base, and the base is arranged on the welding machine assembly table.

[0021] Preferably, a ball screw slide is fixed on the welding machine assembly table, and the base is fixed on the slide of the ball screw slide.

[0022] Preferably, a guide shaft is vertically fixed in the frame, a connecting platform is slidably connected to the guide shaft, one end of a retaining frame is hinged at both ends of the connecting platform, and the other end of the retaining frame is hinged on the slider.

[0023] Beneficial effects of the present invention: by using the automatic welding and forming device for special gas cylinder head butt processing provided by the present invention, a distance measuring device for the width change of the weld is set on the front side of the welding point of the plasma arc welding machine head, and the slider is driven by a two-way hydraulic cylinder to move inward on the light rod, thereby driving the vertical beam and the bottom plug plate to move in the slot. This design enables the ball bearings on the two relative support legs to support the weld to form a double-point support structure, effectively preventing shrinkage deformation caused by thermal stress, maintaining the integrity and dimensional accuracy of the gas cylinder structure, effectively controlling the width and deformation of the weld, ensuring the precise docking of the head and the tank body, and preventing the head from tilting in the horizontal plane after being welded to the tank body. At the same time, the problems of head tilt and welding leakage caused by weld deformation are avoided, and the sealing performance and safety of use of the gas cylinder are improved.

[0024] In addition, when the welding device encounters a welding spot, the paddle contacts the welding spot and flips over and contacts the contact sensor, triggering the electric telescopic rod to work. The movement of the electric telescopic rod will drive the frame and the support frame assembly to rise, so that the support legs and the distance measuring device avoid the welding spot at the spot welding, reducing the pause and adjustment time during the welding process, improving production efficiency, and ensuring the smooth progress of the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the welding device of the present invention;

[0027] Figure 3 For the present invention Figure 2 Schematic diagram of the three-dimensional explosion structure of the welding device;

[0028] Figure 4 This is a schematic diagram of the state where the plug-in board of the present invention is located in the slot;

[0029] Figure 5 It is a schematic diagram of the distance measuring device structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the distance measuring device of the present invention being located in a weld;

[0031] Figure 7 This is a schematic diagram of the state where the support leg of the present invention is located in the weld.

[0032] Description of reference numerals in the figures

[0033] 1. End cap assembly table, 2. End cap, 3. Tank body assembly table, 4. Tank body, 5. Welding machine moving table, 6. Welding machine assembly table, 7. Plasma arc welding head, 8. Ball screw slide, 9. Base, 10. Electric telescopic rod, 11. Frame, 12. Cage, 13. Light rod, 14. Slider, 15. Contact sensor, 16. Pick, 17. Vertical beam, 18. First support frame, 19. Bidirectional hydraulic cylinder, 20. Distance measuring device, 201. Shell, 202. Guide rod, 203. Spring , 204, outer plate, 205, inner panel, 206, connecting column, 207, transverse roller, 208, ranging sensor, 21, main beam, 22, side platform body, 23, sleeve body, 24, second support frame, 25, shaft, 26, first foot plate, 27, second foot plate, 28, slot, 29, foot, 30, ball, 31, plug plate, 32, open groove, 33, guide shaft, 34, inclined surface, 35, guide ball, 36, inner slot, 37, weld, 38, connecting platform. DETAILED DESCRIPTION

[0034] 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. As long as the effects of the present invention can be exerted, various changes can be made to the implementation scheme.

[0035] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0036] Reference Figure 1-7 An automatic welding and forming device for butt-jointing processing of a special gas cylinder head according to this implementation scheme is described.

[0037] The automatic welding forming device of this embodiment is as follows Figure 1As shown, it includes a head assembly platform 1 and a tank body assembly platform 3. The tank body assembly platform 3 is a rotating tire. The head assembly platform 1 is provided with a grabbed head 2, and the tank body assembly platform 3 is provided with a tank body 4, and the tank body 4 rotates on the tank body assembly platform 3. When the head assembly platform 1 and the tank body assembly platform 3 are working, the head 2 and the tank body 4 are butted together, and a weld 37 is formed at the butt joint. Before welding, the weld 37 needs to be processed to be processed as shown in the figure. Figure 6 and Figure 7 As shown, the top is processed into a smooth gap with a certain width; at the same time, multiple spot welding is performed at the circumferential weld 37 between the head 2 and the tank body 4 to pre-fix the head 2 on the tank body 4.

[0038] Further, such as Figure 1 and Figure 2 As shown, a welding machine moving platform 5 is arranged on one side of the tank assembly platform 3, a welding machine assembly platform 6 is arranged on the welding machine moving platform 5, a plasma arc welding head 7 is arranged on the welding machine assembly platform 6, and a supporting frame group is arranged on the front side of the plasma arc welding head 7 to support the part of the weld 37 before being welded by the plasma arc welding head 7.

[0039] When in use, as the tank body 4 rotates clockwise on the tank body assembly platform 3, the plasma arc welding head 7 welds the weld 37. It should be noted that the rotation speed of the tank body assembly platform 3 (tire) is consistent with the welding speed of the plasma arc welding head 7. At this time, the support frame group supports the weld 37 at the front side of the plasma arc welding head 7 to prevent the weld 37 from expanding due to heat and shrinking excessively after cooling, so that the width of the weld 37 after being welded by the plasma arc welding head 7 remains the same as before welding or the shrinkage of the weld 37 is minimized to the greatest extent, the weld width is kept consistent with that before welding, and the stress concentration caused by shrinkage is reduced. It can also prevent deformation of the welding part due to thermal stress, maintain the integrity and dimensional accuracy of the structure, and prevent the horizontal plane from tilting after the head 2 is welded on the tank body 4.

[0040] Specifically, Figure 2 and Figure 3As shown, the support frame group includes a main crossbeam 21, which is a strip-shaped body and is arranged along the length direction of the weld 37. A frame 11 is fixed on the top of the main crossbeam 21, and an electric telescopic rod 10 is fixed on the top of the frame 11. The electric telescopic rod 10 is fixed on a seat 9, and the seat 9 is arranged on the welding machine assembly table 6. A ball screw slide 8 is fixed on the welding machine assembly table 6, and the seat 9 is fixed on the slide of the ball screw slide 8. Before welding, the ball screw slide 8 drives the seat 9 and the frame 11 on the seat 9 and the support frame group to descend, so that the distance measuring device 20, the paddle 16 and the support leg 29 are inserted into the weld 37. During the welding working stage, when the support frame group needs to rise, the electric telescopic rod 10 drives the frame 11 and the support frame group to rise, so that the support leg 29 and the distance measuring device 20 avoid obstacles.

[0041] like Figure 3 As shown, an axle rod 25 is provided at the bottom end of the middle part of the main cross beam 21, and a distance measuring device 20 is provided at the bottom of the axle rod 25. The distance measuring device 20 is used to detect the width of the weld 37. When the width of the weld 37 shrinks due to thermal stress, the support frame group works to support the weld 37.

[0042] The automatic welding forming device of this embodiment further includes a controller. The distance measurement signal detected by the distance measurement device 20 is transmitted to the controller, and the controller controls the electric telescopic rod 10 and the bidirectional hydraulic cylinder 19 to work.

[0043] Furthermore, a side platform 22 is provided at one end of the main crossbeam 21, a sleeve 23 is provided inside the side platform 22, and the plasma arc welding head 7 passes through the sleeve 23. When the support frame assembly rises, the main crossbeam 21 carries the side platform 22 to rise, and the sleeve 23 is movably connected to the plasma arc welding head 7, and the plasma arc welding head 7 itself will not follow the rise and fall, and the welding work will continue. The plasma arc welding head 7 is connected to the main crossbeam 21 to ensure that the welding position of the plasma arc welding head 7, the support leg 29, and the distance measuring device 20 are all located in the weld 37 without deviation.

[0044] In a preferred embodiment, Figure 2 and Figure 3As shown, the end of the main beam 21 away from the side platform 22 is rotatably connected with a paddle 16, and a contact sensor 15 is arranged on the wall of the main beam 21, and the contact sensor 15 is electrically connected to the controller. When the paddle 16 collides with an obstacle, it rotates with the position of the main beam 21 transfer point as the axis and contacts the contact sensor 15, and the obstacle is the welding point at the circumferential spot welding of the weld 37 between the head 2 and the tank body 4. In actual operation, when the paddle 16 contacts the welding point, as the tank body 4 rotates, the paddle 16 flips and finally contacts the contact sensor 15. At this time, the electric telescopic rod 10 drives the frame 11 and the support frame group to rise, so that the support leg 29 and the distance measuring device 20 avoid the welding point at the spot welding. After crossing the welding point, the electric telescopic rod 10 descends, so that the support leg 29 and the distance measuring device 20 are re-embedded in the weld 37. When the support frame group is separated from the weld 37, the weld 37 here will not shrink excessively due to the support of the welding point.

[0045] A polished rod 13 is fixed to the top of the main crossbeam 21, and the polished rod 13 is arranged along the length direction of the main crossbeam 21. Slide blocks 14 are slidably connected to both sides of the polished rod 13, and the two slide blocks 14 are driven by a bidirectional hydraulic cylinder 19 to slide on the polished rod 13; vertical beams 17 are arranged at the bottom of the two slide blocks 14, and a plug plate 31 is arranged at the bottom of the vertical beam 17. When the bidirectional hydraulic cylinder 19 is working, the slide blocks 14 are driven to move synchronously inward or outward on the polished rod 13, and when moving, the vertical beam 17 and the plug plate 31 at the bottom are driven to move synchronously inward or outward.

[0046] Open slots 32 are formed on both sides of the main cross beam 21 , and the vertical beam 17 passes through the open slots 32 .

[0047] A bidirectional support frame is provided at the bottom of the main crossbeam 21, and the bidirectional support frame includes a first support frame 18 and a second support frame 24 arranged in an X shape, and the middle parts of the first support frame 18 and the second support frame 24 are rotatably connected to the shaft 25; the ends of the first support frame 18 and the second support frame 24 are rotatably connected with the first support foot plate 26 and the second support foot plate 27 respectively, and the inner sides of the first support foot plate 26 and the second support foot plate 27 are formed with a slot 28 for inserting the plug plate 31, and the bottoms of the first support foot plate 26 and the second support foot plate 27 are both provided with support feet 29, and the support feet 29 are provided with ball bearings 30, and the ball bearings 30 abut against the wall surface of the weld 37.

[0048] The inner wall surfaces of the first and second support plates 26 and 27 are both inclined surfaces 34, and the two side surfaces of the inserting plate 31 are cut surfaces matching the inclined surfaces 34. The upper width of the inclined surfaces 34 of the inner wall surfaces of the first and second support plates 26 and 27 is a, and the lower width is b, wherein a>b.

[0049] Among them, Figure 4As shown, when the two sliders 14 move relative to each other, the insert plate 31 moves in the slot 28. When moving, the insert plate 31 moves from a to b, pressing against each of the first and second support plates 26 and 27 to open to both sides, so that the balls 30 on the two support legs 29 support the weld 37, forming a double-point support at the weld 37 during the welding process, preventing shrinkage deformation caused by thermal stress. Due to the design of the balls 30, the support legs 29 will not rub hard on the inner wall surface of the weld 37.

[0050] An inner slot 36 is formed in the inclined surface 34 along the length direction of the first supporting plate 26 and the second supporting plate 27 . Guide balls 35 embedded in the inner slot 36 are provided at both ends of the inserting plate 31 .

[0051] The first support plate 26 and the second support plate 27 are connected to the first support frame 18 and the second support frame 24 , and because the cross-sections of the head 2 and the tank body 4 are circular, the first support plate 26 and the second support plate 27 are bent downward at both ends of the first support frame 18 and the second support frame 24 to ensure that the support leg 29 can be inserted into the weld 37 .

[0052] A guide shaft 33 is vertically fixed in the frame 11, and a connecting platform 38 is slidably connected to the guide shaft 33. One end of the retaining frame 12 is hinged at both ends of the connecting platform 38, and the other end of the retaining frame 12 is hinged on the slider 14. When the slider 14 slides inward or outward on the light rod 13, the retaining frame 12 is driven to swing, and the two retaining frames 12 push the connecting platform 38 to slide up and down on the guide shaft 33, and the retaining frame 12 assists the movement of the slider 14.

[0053] like Figure 5 As shown, the distance measuring device 20 includes a housing 201 , a distance measuring sensor 208 , a spring 203 , an inner panel 205 and a transverse roller 207 , wherein the housing 201 is fixed at the bottom of the shaft 25 .

[0054] The two sides of the shell 201 are open cavities, and guide rods 202 are provided at the upper and lower ends of the shell 201; the distance sensor 208 is fixed at the inner center of the shell 201; the inner panel 205 is provided on both sides of the shell 201, and the upper and lower ends are penetrated by the guide rod 202; the outer side of the inner panel 205 is connected to the outer panel 204 through the connecting column 206; the spring 203 is sleeved on the guide rod 202, and the two ends are respectively in contact with the shell 201 and the inner panel 205; the transverse roller 207 is rotatably connected to the bottom of the outer panel 204, and the outer edge of the transverse roller 207 extends out of the open cavities on both sides of the shell 201.

[0055] When the weld 37 is subjected to thermal stress and shrinkage deformation, its width will be narrowed and it will be squeezed on the transverse roller 207. The transverse roller 207 is forced to drive the outer panel 204 and the inner panel 205 to move inward together. At this time, the distance sensor 208 detects that the inner panel 205 moves inward and transmits the detection signal to the controller. The two-way hydraulic cylinder 19 drives the slider 14 to move inward on the light rod 13, driving the vertical beam 17 and the bottom plug plate 31 to move in the slot 28, so that the balls 30 on the two relative support legs 29 support the weld 37 to prevent shrinkage deformation caused by thermal stress.

[0056] 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. An automatic welding and forming device for butt-jointing processing of special gas cylinder heads, comprising a head assembly platform and a tank body assembly platform, the head assembly platform is provided with a head, the tank body assembly platform is provided with a tank body, the head and the tank body are butt-jointed to form a weld; a welding machine moving platform is provided on one side of the tank body assembly platform, the welding machine moving platform is provided with a welding machine assembly platform, characterized in that: A plasma arc welding head is arranged on the welding machine assembly table, and a support frame group is arranged on the front side of the plasma arc welding head to support the portion of the weld before being welded by the plasma arc welding head; The support frame group includes a main crossbeam, a shaft rod is arranged at the bottom of the middle part of the main crossbeam, a side platform body is arranged at one end of the main crossbeam, a sleeve body is arranged in the side platform body, and the plasma arc welding head passes through the sleeve body; A polished rod is fixed on the top of the main crossbeam, and sliders are slidably connected on both sides of the polished rod. The two sliders are driven by a bidirectional hydraulic cylinder to slide on the polished rod; vertical beams are arranged at the bottom of the two sliders, and plug plates are arranged at the bottom of the vertical beams; A bidirectional support frame is arranged at the bottom of the main crossbeam, and the bidirectional support frame includes a first support frame and a second support frame arranged in an X shape, and the middle parts of the first support frame and the second support frame are rotatably connected to the shaft rod; the ends of the first support frame and the second support frame are rotatably connected to the first support plate and the second support plate, respectively, and the inner sides of the first support plate and the second support plate are formed with slots for inserting the plug plate, and the bottoms of the first support plate and the second support plate are both provided with support feet, and the support feet are provided with ball bearings, and the ball bearings abut against the wall surface of the weld; wherein, when the two sliding blocks move relative to each other, the plug plate moves in the slot, presses against the first support plate and the second support plate to stretch them to both sides, so that the ball bearings on the two relatively described support feet support the weld.

2. The automatic welding and forming device for butt-jointing processing of special gas cylinder heads according to claim 1 is characterized in that: The inner wall surfaces of the first supporting plate and the second supporting plate are both inclined surfaces, and the two side surfaces of the inserting plate are cut surfaces adapted to the inclined surfaces.

3. The automatic welding and forming device for butt-jointing processing of special gas cylinder heads according to claim 2 is characterized in that: The inclined surface is provided with an inner groove in the length direction of the first supporting plate and the second supporting plate, and guide balls embedded in the inner groove are arranged at both ends of the inserting plate.

4. The automatic welding and forming device for butt-jointing processing of special gas cylinder heads according to claim 1 is characterized in that: A distance measuring device is provided at the bottom of the shaft, and the distance measuring device comprises: A shell body is fixed at the bottom of the shaft rod, the two sides of the shell body are open cavities, and the upper and lower ends of the shell body are provided with guide rods; A distance measuring sensor is fixed at the inner center of the housing; Inner panels are arranged on both sides of the shell, and the guide rods penetrate the inner panels at both ends; the outer side of the inner panels is connected to the outer panels via connecting columns; A spring, which is sleeved on the guide rod, and has two ends respectively abutting against the shell and the inner panel; The transverse roller is rotatably connected to the bottom of the outer plate, and the outer edge of the transverse roller extends out of the openings on both sides of the shell.

5. The automatic welding and forming device for butt-jointing processing of special gas cylinder heads according to claim 1 is characterized in that: The end of the main beam away from the side platform body is rotatably connected with a paddle, and a contact sensor is arranged on the wall surface of the main beam; wherein, when the paddle collides with an obstacle, it rotates around the main beam transfer point as the axis and contacts the contact sensor.

6. The automatic welding and forming device for butt-jointing processing of special gas cylinder heads according to claim 1 is characterized in that: The upper width of the inclined surface of the inner wall of the first supporting plate and the second supporting plate is a, and the lower width is b, wherein a>b.

7. The automatic welding and forming device for butt-jointing of special gas cylinder heads according to claim 1 is characterized in that: Open slots are formed on both sides of the main cross beam, and the vertical beams pass through the open slots.

8. The automatic welding and forming device for butt-jointing processing of special gas cylinder heads according to claim 1 is characterized in that: A frame is fixed on the top of the main cross beam, an electric telescopic rod is fixed on the top of the frame, the electric telescopic rod is fixed on a base, and the base is arranged on the welding machine assembly table.

9. The automatic welding and forming device for butt-jointing of special gas cylinder heads according to claim 8, characterized in that: A ball screw slide is fixed on the welding machine assembly table, and the base is fixed on the slide of the ball screw slide.

10. The automatic welding and forming device for butt-jointing of special gas cylinder heads according to claim 8, characterized in that: A guide shaft is vertically fixed in the frame, a connecting platform is slidably connected to the guide shaft, one end of a retaining frame is hinged at both ends of the connecting platform, and the other end of the retaining frame is hinged on the slider.

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