Automatic advancing type groove welding device and machining method

Abstract

The invention discloses an automatic advancing type groove welding device which comprises a welding gun and a bearing box, the bearing box is mounted in a mounting cylinder, the bearing box is filled with welding flux, and the welding gun is mounted on the bearing box through a hose; a lifting plate is slidably connected to the upper portion of the supporting base, an inner limiting plate is installed in the supporting base, three outer limiting plates are installed on the outer side of the supporting base at equal angles, and the fixing cylinder and the supporting base are both placed on the ground. And the automatic advancing mechanism is arranged on the fixing cylinder, and the welding gun can advance automatically through the arrangement of the automatic advancing mechanism, and electricity control is not needed. According to the automatic advancing type groove welding device, gas enables the piston to move upwards in the fixing barrel, the piston upwards drives the fixing rod and the supporting plate to synchronously move upwards, the supporting plate drives the welding gun to ascend and descend in the moving process, then the welding gun automatically advances, electric equipment is not needed for enabling the welding gun to ascend and descend, and use of the electric equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of groove welding, in particular to an automatic advancing groove welding device and a processing method. Background Art

[0002] With the breakthrough in the development of unconventional natural resources in the world and the improvement of shale oil and shale gas mining technology in North America, it is possible to obtain long-term, stable and relatively low-cost propane resources. The propane dehydrogenation process has developed rapidly in China, with an amazing expansion rate of production capacity, and has gradually become one of the important sources of propane. With the popularization of propane dehydrogenation devices and the rapid development of the petrochemical industry, the wall thickness of the equipment in the petrochemical industry is getting thicker and thicker, and the diameter is getting larger and larger, which also puts higher requirements on the manufacturing capabilities of manufacturers. In the process of making the cylinder, a specific welding device needs to be used. In the welding process, the cylinder groove position is generally welded, which can increase the welding effect of the cylinder. The grooves processed in the welded part can be used. The grooves of the cylinder are mostly V-shaped grooves. A certain height of blunt edge will be set between the groove of the cylinder and its inner wall. The blunt edge is the end face part that is not grooved along the thickness direction of the cylinder when the cylinder is grooved. The function of the blunt edge is to prevent the root from burning through.

[0003] For example, a pipe welding device with a groove pretreatment function is disclosed with publication number CN116619172B, which includes a welding lower support, both ends of the upper side surface of the welding lower support are connected with an alignment ring sleeve through a support seat, each alignment ring sleeve is distributed with a locking ring sleeve on one side close to the middle of the welding lower support, the locking ring sleeve is installed on the support seat, and the alignment ring sleeve and the locking ring sleeve are arranged coaxially, and a rotating part is provided on the outer ring surface of the two locking ring sleeves and on one end close to each other, the working top plate is installed between the two rotating parts and is driven by the rotating part to rotate around the locking ring sleeve, and the rotating part can adopt an annular electric slider.

[0004] The above-mentioned pipe welding device uses an annular electric slider to make the rotating part and the welding head rotate synchronously. During the rotation process, the rotation angle of the welding head needs to be controlled. The entire welding device is realized by multiple electrical equipment, which requires a large amount of funds. The control of the operation between various electrical equipment needs to be automatic under a certain program. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic moving groove welding device and processing method to solve the problem raised in the above background technology that the entire welding device on the current market is realized by multiple electrical equipment, which requires a large amount of capital, and the control of the operation of each electrical equipment needs to be automatic under a certain program.

[0006] To achieve the above object, the present invention provides the following technical solutions: an automatic traveling groove welding device, comprising a welding gun and a carrying box, the carrying box is installed inside the installation tube, the inside of the carrying box is filled with solder, and the welding gun is installed on the carrying box through a hose; It also includes: a lifting plate is slidably connected above the support base, an inner limit plate is installed inside the support base, and three outer limit plates are installed at equal angles outside the support base, and the fixing cylinder and the support base are placed on the ground; An automatic moving mechanism is arranged on the fixed cylinder, and the welding gun can move automatically through the arrangement of the automatic moving mechanism without the need for electrical control.

[0007] Preferably, the spacing between the outer limit plate and the inner limit plate is equal to the thickness of the cylinder, the cylinder is located above the lifting plate, three push rods are installed at equal angles on the outside of the lifting plate, and a return spring is installed at the lower end of the lifting plate and the inside of the support base.

[0008] Preferably, the inner limit plate is installed with an inner core column, three threaded rods are connected to the inner core column for rotation at equal angles, and the other end of the top threaded rod is threadedly connected to a moving rod, a roller is fixed on the threaded rod, and the outer side of the roller fits with the inner side of the cylinder.

[0009] Preferably, an extrusion plate is installed at the end of the moving rod, three inner air bags are installed at equal angles at the inner upper end of the inner core column, and a connecting tube is installed at the lower end of the inner air bag.

[0010] Preferably, the automatic advancing mechanism includes a fixed cylinder, a piston, a fixed rod and a support plate, the end of the fixed cylinder is fixed to the fixed cylinder, the piston is fitted inside the fixed cylinder, the upper end of the piston is equipped with a fixed rod, the end of the fixed rod is fixed to the support plate, an air valve, an outer air bag and a pressure valve are installed on the connecting pipe, the pressure valve is located above the outer air bag, the air valve is electrically connected to the upper control switch, and the three upper control switches are arranged at equal angles on the inner core column.

[0011] Preferably, the connecting pipe is located below the piston, a mounting rod is fixed between the upper end of the fixing cylinder and the upper end of the inner limit plate, and the pressure valve is located directly below the push rod.

[0012] Preferably, a connecting rod is slidably connected inside the support plate, the connecting rod is connected at one end away from the inner limit plate, a mounting cylinder is fixed to the inner end of the connecting rod, and a bolt assembly is provided between the connecting rod and the support plate.

[0013] Preferably, a lower control switch is installed at one end of the mounting tube close to the inner limit plate, and the lower control switch is used to control the welding gun. The welding gun is electrically connected to the lower control switch. A hollow tube is slidably connected inside the mounting tube, and a connecting spring is arranged between one end of the hollow tube close to the mounting tube and the carrying box.

[0014] Preferably, the welding gun is installed through the inside of the hollow cylinder, and a pressing plate is installed on the outside of the hollow cylinder, and the pressing plate is fitted with the lower control switch.

[0015] The present invention also provides an automatic advancing groove processing method, the processing method comprising the steps of: S1: tooling design; The tooling pressing adopts the hot pressing method. The curvature of the cylinder after the tooling design is consistent with the requirements of the drawing to prevent the curvature of the cylinder from being too large or too small after the cylinder is led. S2: Choice of barrel leading method; The barrel can be headed by direct pressing of the plate rolling machine, reserving straight edge and using the plate rolling machine through tooling. Choose the appropriate pressing head according to the needs. Confirm the blanking length of the cylinder, and the width is determined according to the position of the annular seam in the cylinder layout diagram; S3: Melon slice cylinder rolling; Place the melon slices between the upper and lower rollers and just follow the normal rolling procedure; S4: cylinder pre-assembly; After the benchmark is determined, the single melon slice is erected and hoisted onto the platform to form a whole cylinder section. After confirming that the ovality and edge angle meet the requirements, it is disassembled and loaded onto a truck and sent to Qingdao Jinneng site; After arriving at Qingdao Jinneng site, the cylinder is pre-assembled again. After assembly, the cylinder is shaped and fixed by welding device.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a piston, a fixing rod and a support plate. The gas enters the inside of the fixing cylinder, and the gas causes the piston to move upward inside the fixing cylinder. The piston drives the fixing rod and the support plate to move upward synchronously. During the movement of the support plate, the welding gun is driven up and down, and then the welding gun moves automatically. No electrical equipment is needed to move the welding gun up and down, thereby reducing the use of electrical equipment. 2. The present invention is provided with a roller, an inner airbag and an extrusion plate. The outer side of the roller is fitted with the inner side of the cylinder. The cylinder moves to make the roller and the threaded rod rotate synchronously. The distance between the cylinder and the roller can reduce the friction between the cylinder and the inner limit plate, so as to better place the cylinder. The threaded rod rotates to make the extrusion plate move to squeeze the inner airbag, so that the gas inside the inner airbag enters the outer airbag to realize energy storage. The stored energy gas makes the welding gun move automatically. 3. The present invention is provided with a lower control switch, a hollow cylinder and a pressing plate. After the hollow cylinder and the cylinder body are squeezed against each other, the hollow cylinder moves toward the inside of the installation cylinder, and the squeezing plate moves synchronously to squeeze the lower control switch to stop the welding of the welding gun. When encountering the groove position, the squeezing plate will not squeeze the lower control switch, and the welding gun sprays out solder. Therefore, in the process of adjusting the angle of the welding gun, the welding gun can automatically identify the groove position to achieve welding. At the same time, in the welding process, the welding gun can automatically open and close according to the welding degree of the groove to avoid excessive or insufficient welding, so that the welding tail vertebra of the cylinder body can be beautiful and firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the main cross-sectional structure of the fixed tube of the present invention; Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 4 It is a schematic diagram of the main structure of the present invention; Figure 5 This is a schematic diagram of the top-sectional structure of the mounting tube of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the inner core column of the present invention; Figure 7 It is a schematic diagram of the main cross-sectional structure of the support base of the present invention.

[0018] In the figure: 1. support base; 2. lifting plate; 3. fixed cylinder; 4. connecting rod; 5. connecting pipe; 6. outer air bag; 7. pressure valve; 8. inner limit plate; 9. roller; 10. moving rod; 11. threaded rod; 12. extrusion plate; 13. upper control switch; 14. outer limit plate; 15. mounting rod; 16. fixing rod; 17. piston; 18. support plate; 19. bolt assembly; 20. hollow cylinder; 21. pressing plate; 22. lower control switch; 23. mounting cylinder; 24. air valve; 25. welding gun; 26. connecting spring; 27. bearing box; 28. push rod; 29. ​​reset spring; 30. inner air bag; 31. inner core column. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-Figure 7 , the present invention provides a technical solution: An automatic advancing groove welding device comprises a welding gun 25 and a carrying box 27. The carrying box 27 is installed inside a mounting tube 23. The interior of the carrying box 27 is filled with solder. The welding gun 25 is installed on the carrying box 27 through a hose. The welding gun 25 is installed inside a hollow tube 20. A pressing plate 21 is installed on the outer side of the hollow tube 20. The pressing plate 21 is fitted with a lower control switch 22. The lower control switch 22 is installed at one end of the mounting tube 23 close to the inner limit plate 8. The lower control switch 22 is used to control the welding gun 25. The welding gun 25 is electrically connected to the lower control switch 22. The interior of the mounting tube 23 is slidably connected with the hollow tube 20, and a connecting spring 26 is provided between one end of the hollow tube 20 close to the mounting tube 23 and the carrying box 27.

[0021] The hollow cylinder 20 is always resisted by the cylinder body during the revolution, and the pressing plate 21 is always squeezing the lower control switch 22. The lower control switch 22 controls the welding gun 25 not to operate. Therefore, the welding gun 25 is always not working during the revolution. When the welding gun 25 rotates to the groove position of the cylinder body, the distance between the groove and the hollow cylinder 20 becomes larger. At this time, the elastic force of the connecting spring 26 makes the hollow cylinder 20 and the pressing plate 21 move to the side close to the cylinder body. At this time, the pressing plate 21 will not squeeze the lower control switch 22. At this time, the welding gun 25 runs to spray solder, and the solder fills the groove position. When the groove position is filled, the filler will squeeze the hollow cylinder 20. At this time, the welding gun 25 will no longer operate. The welding gun 25 can be automatically closed and operated without personnel control, which can avoid excessive or insufficient solder spraying, make the welding at the groove position of the cylinder body beautiful, and also ensure that the welding strength between the cylinders is sufficient.

[0022] The support plate 18 is internally slidably connected with a connecting rod 4 , one end of the connecting rod 4 is connected away from the inner limit plate 8 , a mounting tube 23 is fixed to the inner end of the connecting rod 4 , and a bolt assembly 19 is provided between the connecting rod 4 and the support plate 18 .

[0023] Since the cylinder is relatively heavy, it is not convenient to adjust the position of the cylinder. The position of the welding device is adjusted according to the position of the cylinder groove. The bolt assembly 19 is operated by hand to disassemble the bolt assembly 19 and the support plate 18. Then, the connecting rod 4 is pulled by hand. The connecting rod 4 revolves around the center of the support base 1. During the revolution of the connecting rod 4, the installation cylinder 23 is driven to revolve synchronously. During the movement of the installation cylinder 23, the hollow cylinder 20 is driven to move synchronously.

[0024] A lifting plate 2 is slidably connected above the support base 1, an inner limit plate 8 is installed inside the support base 1, and three outer limit plates 14 are installed at equal angles on the outside of the support base 1. The fixed cylinder 3 and the support base 1 are both placed on the ground; an automatic travel mechanism is set on the fixed cylinder 3, and the welding gun 25 can be automatically moved by the setting of the automatic travel mechanism without the need for electrical control. The automatic travel mechanism includes a fixed cylinder 3, a piston 17, a fixed rod 16 and a support plate 18. The end of the fixed cylinder 3 is fixed to the fixed cylinder 3, and the fixed cylinder 3 is fixed to the fixed cylinder 3. A piston 17 is fitted inside, and a fixing rod 16 is installed on the upper end of the piston 17. The end of the fixing rod 16 is fixed to the support plate 18. An air valve 24, an outer air bag 6 and a pressure valve 7 are installed on the connecting pipe 5. The pressure valve 7 is located above the outer air bag 6. The air valve 24 is electrically connected to the upper control switch 13. The three upper control switches 13 are arranged at equal angles on the inner core column 31. The connecting pipe 5 is located below the piston 17. A mounting rod 15 is fixed between the upper end of the fixing cylinder 3 and the upper end of the inner limit plate 8. The pressure valve 7 is located directly below the push rod 28.

[0025] The cylinder is placed between the inner limit plate 8 and the outer limit plate 14. When the cylinder contacts the lifting plate 2, the weight of the cylinder causes the lifting plate 2 to move downward. The downward movement of the lifting plate 2 drives the push rod 28 to move downward synchronously. When the push rod 28 moves downward to push the pressure valve 7, the push rod 28 causes the pressure valve 7 to rotate. When the lifting plate 2 moves to the bottom, the pressure valve 7 makes the connecting pipe 5 just conductive. At this time, the internal gas of the outer airbag 6 passes through the air valve 24 to allow the gas to evenly enter the interior of the fixed cylinder 3. The gas causes the piston 17 to move upward. During the upward movement of the piston 17, the fixed rod 16 is driven to move upward synchronously. During the upward movement of the fixed rod 16, the support plate 18 is driven to move upward synchronously, thereby causing the welding gun 25 to move upward. The welding gun 25 realizes automatic traveling welding. The welding gun 25 is moved by the stored force, which does not require electrical equipment, thereby reducing the use of electrical equipment.

[0026] The distance between the outer limit plate 14 and the inner limit plate 8 is equal to the thickness of the cylinder. The cylinder is located above the lifting plate 2. Three push rods 28 are installed at equal angles on the outer side of the lifting plate 2. A return spring 29 is installed between the lower end of the lifting plate 2 and the inside of the support base 1. An inner core column 31 is installed inside the inner limit plate 8. Three threaded rods 11 are connected to the inner core column 31 for rotation at equal angles. The other end of the top threaded rod 11 is threadedly connected to the moving rod 10. A roller 9 is fixed on the threaded rod 11. The outer side of the roller 9 fits the inner side of the cylinder. An extrusion plate 12 is installed at the end of the moving rod 10. The extrusion plate 12 is slidably connected to the inner core column 31. Three inner air bags 30 are installed at equal angles on the upper end of the inner core column 31. A connecting pipe 5 is installed at the lower end of the inner air bag 30.

[0027] The cylinder is hoisted between the outer limit plate 14 and the inner limit plate 8. The roller 9 rotates during the downward drop of the cylinder. The rotation of the roller 9 drives the threaded rod 11 to rotate synchronously. During the rotation of the threaded rod 11, the extrusion plate 12 moves toward the side of the inner airbag 30. The extrusion plate 12 moves to squeeze the inner airbag 30. The inner airbag 30 squeezes the internal gas into the outer airbag 6 to achieve gas transfer, which can make the outer airbag 6 expand and carry more gas. When the welding is completed, the crane lifts the cylinder. During the upward movement of the cylinder, the roller 9 The roller 9 rotates in the opposite direction to move the extrusion plate 12 in the opposite direction. During the process of the extrusion plate 12 moving in the opposite direction, the inner air bag 30 is gradually no longer squeezed. At this time, the overall weight of the support plate 18 causes the piston 17 to move downward. The downward movement of the piston 17 causes the gas inside the fixed cylinder 3 to enter the inner air bag 30 through the connecting pipe 5 and the outer air bag 6. When the extrusion plate 12 moves to squeeze the upper control switch 13, the upper control switch 13 is squeezed to close the upper control switch 13. During the upward movement of the push rod 28, the pressure valve 7 will not be closed.

[0028] This embodiment provides an automatic advancing groove processing method, the processing method comprising the steps of: S1: tooling design; S11: The design of the tooling must ensure that the curvature of the cylinder after the head is consistent with the requirements of the drawing, to prevent the curvature of the cylinder from being too large or too small, which will cause the ovality and edge angle of the cylinder after the longitudinal seam is assembled to exceed the standard and fail to meet the requirements of the standard specification; S12: The plate thickness of the head tooling is 160mm, and the theoretical pressing thickness of the plate rolling machine is 160mm. The hot pressing method is adopted during the pressing process. The tooling material needs to be heated to 500-600℃ before pressing; S13: After the tooling is pressed, a rounded sample is used to check whether the curvature of the tooling is qualified; S2: Choice of barrel leading method; The barrel can be headed by direct pressing of the plate rolling machine, reserving straight edge and using the plate rolling machine through tooling. Choose the appropriate pressing head according to the needs. S21: Barrel blanking and groove processing: First, confirm the blanking length of the cylinder. The width is determined according to the position of the annular seam in the cylinder layout diagram. The confirmation of the annular seam position must meet the requirements that the pipe opening and the position of the internal parts shall not be on the annular seam, and the distance between the opening center and the annular seam shall not be less than 2 times the opening radius; S22: Tooling preparation: Weld lifting lugs to the tooling to facilitate its lifting; Secondly, insert the tooling between the upper and lower rollers of the plate rolling machine, and press down the upper roller until the tooling is fixed; Secondly, observe whether the length direction of the tooling is perpendicular to the plate rolling machine. If it is not perpendicular, the curvature on both sides of the barrel head section will be inconsistent when the head is brought. Finally, if the tooling is not vertical, slowly start the plate rolling machine and use a crowbar to adjust the verticality of the two; S23: Cylinder with head: First, hoist the end of one end of the cylinder between the upper roller of the plate rolling machine and the tooling, and adjust the width of the cylinder to be parallel to the width of the tooling through the tail of the cylinder; Secondly, press down the upper roller to make the plate rolling machine, tooling and cylinder plate fit tightly together. Then, start the plate rolling machine, roll back and forth, and constantly adjust the downward pressure of the upper roller during the rolling process to ensure the forming of the end of the cylinder. Finally: After pressing and forming, use the curvature sample to detect the curvature of the cylinder end; S3: Melon slice cylinder rolling; After the melon slices are headed at both ends, remove the tooling, put the melon slices between the upper and lower rollers, and just follow the normal rolling procedure; During the rolling process, the arc template is used to continuously measure the curvature of the cylinder. After the rolling is completed, the length of the melon slices at both ends is measured to ensure that the length meets the theoretical requirements. S4: cylinder pre-assembly; First, place a steel plate on the ground as the platform surface, and draw a circle of ∅11900mm on the steel plate as a reference; Secondly, weld the lifting ears and turning lifting ears on the melon segments, and lift the single melon segment upright onto the platform. To prevent the erected melon segments from being touched when assembling the remaining melon segments, thus causing the melon segments to tip over, the melon segments are connected and supported by the platform with a connecting plate when they are erected. Put the three melon slices and petals together to form a whole cylinder section again, and require the inner side of the cylinder to be consistent with the reference as much as possible. By measuring the maximum and minimum diameters of the cylinder, the difference between the two is required to be less than 25 mm. Use an arc template to measure the edge angle of the longitudinal seam between the two melon slices. The edge angle must not exceed 5 mm. After confirming that the ovality and edge angle meet the above requirements, disassemble and load them to Qingdao Jinneng site; Finally, the cylinder reaches the designated position and is pre-assembled again. After the assembly is completed, the cylinder is shaped and fixed by a welding device.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic traveling groove welding device, comprising a welding gun (25) and a carrying box (27), wherein the carrying box (27) is installed inside a mounting tube (23), the inside of the carrying box (27) is filled with solder, and the welding gun (25) is installed on the carrying box (27) via a hose; It is characterized in that Also includes: A lifting plate (2) is slidably connected above the support base (1), an inner limit plate (8) is installed inside the support base (1), and three outer limit plates (14) are installed at equal angles outside the support base (1), and the fixing cylinder (3) and the support base (1) are both placed on the ground; An automatic advancing mechanism is arranged on the fixed cylinder (3), and the welding gun (25) can be automatically advanced by the arrangement of the automatic advancing mechanism without the need for electrical control.

2. The automatic advancing groove welding device according to claim 1, characterized in that: The distance between the outer limit plate (14) and the inner limit plate (8) is equal to the thickness of the cylinder. The cylinder is located above the lifting plate (2). Three push rods (28) are installed at equal angles on the outer side of the lifting plate (2). A return spring (29) is installed between the lower end of the lifting plate (2) and the inside of the support base (1).

3. The automatic advancing groove welding device according to claim 1, characterized in that: An inner core column (31) is installed inside the inner limit plate (8), and three threaded rods (11) are rotatably connected at equal angles inside the inner core column (31), and the other end of the top threaded rod (11) is threadedly connected to a moving rod (10), and a roller (9) is fixed on the threaded rod (11), and the outer side of the roller (9) is in contact with the inner side of the cylinder.

4. The automatic advancing groove welding device according to claim 3, characterized in that: An extrusion plate (12) is installed at the end of the moving rod (10), three inner air bags (30) are installed at equal angles on the inner upper end of the inner core column (31), and a connecting pipe (5) is installed at the lower end of the inner air bag (30).

5. The automatic advancing groove welding device according to claim 1, characterized in that: The automatic advancing mechanism comprises a fixed cylinder (3), a piston (17), a fixed rod (16) and a support plate (18); the end of the fixed cylinder (3) is fixed to the fixed cylinder (3); the piston (17) is fitted inside the fixed cylinder (3); the upper end of the piston (17) is mounted with a fixed rod (16); the end of the fixed rod (16) is fixed to the support plate (18); an air valve (24), an outer air bag (6) and a pressure valve (7) are mounted on the connecting pipe (5); the pressure valve (7) is located above the outer air bag (6); the air valve (24) is electrically connected to an upper control switch (13); and the three upper control switches (13) are arranged at equal angles on the inner core column (31).

6. The automatic advancing groove welding device according to claim 5, characterized in that: The connecting pipe (5) is located below the piston (17), a mounting rod (15) is fixed between the upper end of the fixed cylinder (3) and the upper end of the inner limit plate (8), and the pressure valve (7) is located directly below the push rod (28).

7. The automatic advancing groove welding device according to claim 5, characterized in that: A connecting rod (4) is slidably connected inside the support plate (18), one end of the connecting rod (4) away from the inner limit plate (8) is connected, a mounting cylinder (23) is fixed to the inner end of the connecting rod (4), and a bolt assembly (19) is provided between the connecting rod (4) and the support plate (18).

8. The automatic advancing groove welding device according to claim 1, characterized in that: A lower control switch (22) is installed at one end of the mounting tube (23) close to the inner limit plate (8), and the lower control switch (22) is used to control the welding gun (25). The welding gun (25) is electrically connected to the lower control switch (22). The interior of the mounting tube (23) is slidably connected to a hollow tube (20), and a connecting spring (26) is provided between one end of the hollow tube (20) close to the mounting tube (23) and the bearing box (27).

9. The automatic advancing groove welding device according to claim 1, characterized in that: The welding gun (25) is installed through the inside of the hollow cylinder (20), and a pressing plate (21) is installed on the outside of the hollow cylinder (20), and the pressing plate (21) is fitted with the lower control switch (22).

10. An automatic advancing groove processing method, characterized in that: The processing method comprises the steps of: S1: tooling design; The tooling pressing adopts the hot pressing method. The curvature of the cylinder after the tooling design is consistent with the requirements of the drawing to prevent the curvature of the cylinder from being too large or too small after the cylinder is led. S2: Choice of barrel leading method; The barrel can be headed by direct pressing of the plate rolling machine, reserving straight edge and using the plate rolling machine through tooling. Choose the appropriate pressing head according to the needs. Confirm the blanking length of the cylinder, and the width is determined according to the position of the annular seam in the cylinder layout diagram; S3: Melon slice cylinder rolling; Place the melon slices between the upper and lower rollers and just follow the normal rolling procedure; S4: cylinder pre-assembly; After the benchmark is determined, the single melon slice is erected and hoisted onto the platform to form a whole cylinder section. After confirming that the ovality and edge angle meet the requirements, it is disassembled and loaded onto a truck and sent to Qingdao Jinneng site; After arriving at Qingdao Jinneng site, the cylinder is pre-assembled again. After assembly, the cylinder is shaped and fixed by welding device.

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