A steel bottle welding production line

Abstract

The application relates to the technical field of metal welding, in particular to a steel cylinder welding production line, which comprises a first conveying device, a blanking device is arranged on the first conveying device, a second conveying device is arranged on one side of the first conveying device, a transfer part is arranged between the first conveying device and the second conveying device, a first carrying mechanical hand is arranged at one end of the second conveying device, a third conveying device and a hot spinning device are arranged on one side of the first carrying mechanical hand, a second carrying mechanical hand and a third carrying mechanical hand are arranged on one side of the third conveying device, an opening device and a gas tightness detection device are arranged between the second carrying mechanical hand and the third carrying mechanical hand, a welding device is arranged on one side of the second carrying mechanical hand, a fourth conveying device is arranged between the gas tightness detection device and the welding device, a fifth conveying device is arranged on one side of the third carrying mechanical hand, and a constraint part for constraining a steel pipe is arranged on the first conveying device. The application has the effect of improving the quality of steel cylinder finished products.

Description

Technical Field

[0001] This application relates to the field of metal welding technology, and in particular to a steel cylinder welding production line. Background Technology

[0002] A steel cylinder is a tank made of steel. A steel cylinder generally consists of a cylinder blank, with a protective cover welded to the top and a bottom ring welded to the bottom. One end of the protective cover is the valve seat end, which has a valve seat port. They are widely used in daily life, such as the gas cylinders, oxygen cylinders and other gas cylinders we use in our lives, which provide us with a variety of conveniences.

[0003] Chinese patent CN109623214A discloses a fully automated welding production line for steel cylinders, including a first discharge hopper, a feeding robot, a welding machine, a second discharge hopper, a discharge robot, a circulating conveyor line, and steel cylinder-specific tooling plates. The production line is arranged sequentially from upstream to downstream as follows: discharge hopper, feeding robot, welding machine, second discharge hopper, discharge robot, and circulating conveyor line. Multiple sets of steel cylinder-specific tooling plates are installed on the circulating conveyor line, which maintain relative movement with the circulating conveyor line.

[0004] During the use of the above technology, the cylinder assembly process, welding process, and cylinder posture during transportation cannot be effectively guaranteed, resulting in a large number of defective products in the subsequent welding process and subsequent airtightness testing, which greatly reduces the production yield of cylinders. Summary of the Invention

[0005] In order to improve the production quality of steel cylinders, this application provides a steel cylinder welding production line.

[0006] The steel cylinder welding production line provided in this application adopts the following technical solution: A steel cylinder welding production line includes a first conveying device on which steel pipes are conveyed. The first conveying device is equipped with a cutting device for the steel pipes. A second conveying device is located beside the first conveying device. A transfer component is provided between the first and second conveying devices. A first handling robot is located at one end of the second conveying device for handling the cut steel pipes. A third conveying device and a hot spinning device are located beside the first handling robot. The hot spinning device is used to spin the heated steel pipes into steel cylinder blanks. A second and third handling robots are located beside the third conveying device. An opening device and an airtightness detection device are provided between the two hands. The opening device is used to open the valve seat of the cylinder blank, and the airtightness detection device is used to detect the airtightness of the cylinder blank after the valve seat is opened. A welding device is provided next to the second handling robot. A fourth conveying device is provided between the airtightness detection device and the welding device. The welding device is used to weld the protective cover and bottom ring to the opened cylinder blank. A fifth conveying device is provided next to the third handling robot. The fifth conveying device is used to convey cylinder blanks that fail the airtightness test. The first, second, third, fourth and fifth conveying devices are all the same. The first conveying device is provided with a constraint member for constraining the steel pipe.

[0007] By adopting the above technical solution, during the transportation process from steel pipe to steel pipe blank, then to steel cylinder blank, and finally to steel cylinder, the first, second, third, fourth, and fifth conveying devices are all equipped with constraint components. Under the constraint of these components, the cylinder is transported in a stable state, reducing the possibility of it detaching from the conveying device and thus improving the qualification rate of the finished product.

[0008] Optionally, the first conveying device includes a conveying frame, on which a plurality of conveying rollers are rotatably mounted. The plurality of conveying rollers are arranged along the conveying direction of the steel pipe. Synchronous pulleys are mounted on the conveying rollers, and a synchronous belt is mounted on the plurality of synchronous pulleys for common rotation. A conveying motor electrically connected to the control system is mounted on the conveying frame. The output shaft of the conveying motor is coaxially mounted on one of the conveying rollers. The constraint member includes constraint cones mounted at both ends of the conveying rollers. The diameter of the constraint cones gradually increases from the center of the conveying roller axis towards both ends.

[0009] By adopting the above technical solution, the steel pipe blank is always kept between the constraint cones at both ends of the conveyor roller under the constraint of the constraint cones on the conveyor roller. The control system starts the conveyor motor, and the conveyor motor drives all the conveyor rollers on the conveyor frame to rotate through the combined action of the synchronous belt and synchronous pulley, so that the steel pipe is stably conveyed on the conveyor frame, which helps to reduce the possibility of the steel pipe blank leaving the conveyor frame during the conveying process.

[0010] Optionally, the feeding device includes a cutting frame mounted on the first conveying device, a baffle cylinder electrically connected to the control system mounted on the cutting frame, a baffle plate mounted on the piston rod of the baffle cylinder for blocking the steel pipe, a cutting nozzle mounted on the cutting frame for cutting the steel pipe, and a rotating assembly mounted on the cutting frame for rotating the steel pipe.

[0011] By adopting the above technical solution, the control system starts the baffle cylinder, which drives the baffle plate to extend and block the steel pipe raw material through its piston rod. The rotating component drives the steel pipe to rotate, and at the same time the cutting nozzle cuts the steel pipe, cutting the steel pipe blanks from the baffle plate to the cutting nozzle in length, so that the cut steel pipe blanks are of the same length, which helps to improve the product quality of the same batch of steel cylinders.

[0012] Optionally, the rotating assembly includes a bidirectional screw rotatably mounted on a cutting frame, a clamping motor electrically connected to a control system on the cutting frame, the bidirectional screw coaxially mounted on the output shaft of the clamping motor, clamping rods on both sides of the steel pipe conveying direction, the clamping rods being threadedly connected to both ends of the bidirectional screw, a guide rod parallel to the axis of the bidirectional screw on the cutting frame, the clamping rods being slidably sleeved on the guide rods, a drive wheel rotatably mounted on the clamping rods, the drive wheel being used to abut against the outer wall of the steel pipe, and a rotating motor electrically connected to a control system on the clamping rods, the drive wheel being coaxially mounted on the output shaft of the rotating motor.

[0013] By adopting the above technical solution, the control system starts the clamping motor to rotate, which drives the bidirectional screw to rotate. The bidirectional screw drives the clamping rod on it to approach the steel pipe until the drive wheel on the clamping rod abuts against the outer wall of the steel pipe. Then the control system starts the rotating motor, which drives the drive wheel to rotate. The friction between the drive wheel and the outer wall of the steel pipe drives the steel pipe to rotate. Then, the steel pipe is cut to a fixed length by passing through the cutting nozzle on the cutting frame.

[0014] Optionally, the transfer component includes a transfer rack rotatably mounted on the conveyor frame of the second conveying device, with one end of the transfer rack away from its rotation center placed on the conveyor frame of the first conveying device, and a tilting cylinder electrically connected to the control system rotatably mounted on the conveyor frame of the second conveying device, the piston rod of the tilting cylinder being hinged to the transfer rack.

[0015] By adopting the above technical solution, when the cut steel pipe blank is transported to the transfer rack, the control system starts the tilting cylinder. The tilting cylinder drives the transfer rack to rotate around its rotation center through its piston rod, so that the steel pipe blank on the first conveying device's conveying rack rolls to the second conveying device's conveying rack. This process reduces the difficulty for workers to handle the steel pipe blank and helps to reduce the labor intensity of workers.

[0016] Optionally, the second conveying device is equipped with a heating box. The hot spinning device includes a mounting base, on which a spinning three-jaw chuck is rotatably mounted. A mounting motor, electrically connected to a control system, is mounted on the mounting base to drive the spinning three-jaw chuck. A spinning plate is laterally slidably mounted on the mounting base. A transverse cylinder, electrically connected to the control system, is mounted on the mounting base. The spinning plate is mounted on the piston rod of the transverse cylinder. A spinning seat is slidably mounted on the spinning plate. A longitudinal cylinder, electrically connected to the control system, is mounted on the spinning plate. The spinning seat is mounted on the piston rod of the longitudinal cylinder. A spinning motor, electrically connected to the control system, is mounted on the spinning seat. A spinning disc is mounted on the output shaft of the spinning motor. A spinning blade is mounted on the spinning disc. A spinning spray gun is mounted on the spinning seat. The spinning spray gun is used for heating the cylinder preform.

[0017] By adopting the above technical solution, the control system starts the conveyor motor on the conveyor frame of the second conveying device to rotate in the reverse direction. The synchronous belt and synchronous pulley drive the conveyor roller to rotate in the reverse direction, so that the steel pipe blank is conveyed to the heating box for heating. After a period of time, the control system starts the conveyor motor to rotate in the forward direction, so that the heated steel pipe blank is conveyed to the vicinity of the first handling robot. The first handling robot moves the heated steel pipe blank to the spinning three-jaw chuck on the mounting base for clamping. Then the mounting motor drives the spinning three-jaw chuck on the mounting base to rotate. At the same time, the control system starts the transverse cylinder to push the spinning plate to move, the longitudinal cylinder to push the spinning seat to move, and the spinning motor to rotate. Thus, the spinning knife on the spinning plate spins the steel pipe blank. At the same time, during the spinning process, the spinning spray gun continuously heats the steel pipe blank, so that one end of the steel pipe blank has a valve seat end for opening the valve seat port. Then the first handling robot flips the steel pipe blank and clamps it again by the spinning three-jaw chuck. Then the other end of the steel cylinder blank is spun out without the valve seat end. After this, the first handling robot moves the processed steel cylinder blank to the third conveying device.

[0018] Optionally, the opening device includes an opening seat, an opening three-jaw chuck rotatably mounted on the opening seat, an opening motor electrically connected to the control system for driving the opening three-jaw chuck to rotate on the opening seat, an opening plate slidably mounted on the opening seat, an opening cylinder electrically connected to the control system on the opening seat, an opening plate mounted on the piston rod of the opening cylinder, an opening disc rotatably mounted on the opening plate, a conversion motor electrically connected to the control system on the opening plate, an opening disc coaxially mounted on the output shaft of the conversion motor, and a milling cutter, a drill bit, and a tap bit mounted on the opening disc.

[0019] By adopting the above technical solution, the second handling robot moves the cylinder blank from the third conveying device to the open-end three-jaw chuck on the open-end seat, and makes the valve seat end of the cylinder blank face away from the open-end three-jaw chuck. Then, the control system starts the open-end motor, which drives the cylinder blank to rotate through the open-end three-jaw chuck. At the same time, the control system starts the conversion motor to rotate, so that the milling cutter, drill bit and tap on the open-end plate are aligned with the valve seat end of the cylinder blank in sequence. At the same time, the control system starts the open-end cylinder to push the open-end plate to repeatedly approach the cylinder blank, thereby opening the cylinder blank. The processing is convenient and reduces the processing difficulty for workers.

[0020] Optionally, the airtightness testing device includes a pressurizing tube disposed on an open plate, the pressurizing tube being inserted into a valve seat port and pressurizing the gas cylinder blank, an air pump electrically connected to the control system being disposed next to the open plate, a flexible tube being connected between the air pump and the pressurizing tube, a pressure valve being connected to the flexible tube, and the pressure valve being electrically connected to the control system.

[0021] By adopting the above technical solution, after the cylinder blank is tapped, the control system controls the conversion motor to continue rotating, so that the pressure tube on the open plate points to the valve seat port of the cylinder blank. At the same time, the open cylinder pushes the open plate to insert the pressure tube into the valve seat port of the cylinder blank. Then, the control system starts the air pump to fill the cylinder blank with a certain amount of high-pressure gas. Then, the control system controls the air pump to stop filling the gas. The control system monitors the pressure value transmitted on the pressure valve. When the pressure value on the pressure valve does not change for a period of time, the open cylinder drives the pressure tube to detach from the cylinder blank through the open plate. The second handling robot moves the cylinder blank to the welding device. Conversely, the third handling robot moves the cylinder blank to the conveyor frame of the fifth conveying device.

[0022] Optionally, the welding device includes a fourth handling robot arm disposed next to the fourth conveying device, a welding seat disposed next to the fourth handling robot arm, a placement rack disposed on the welding seat, the placement rack being used to place gas cylinder preforms with qualified airtightness, welding plates being slidably disposed on the welding seat at both ends of the gas cylinder preform, welding three-jaw chucks being rotatably disposed on the welding plates, welding motors being disposed on the welding plates for driving the rotation of the welding three-jaw chucks and electrically connected to the control system, the welding three-jaw chucks on the welding plates at both ends of the gas cylinder preform being used to clamp the protective cover and the bottom ring respectively, and welding components for welding the protective cover and the bottom ring being disposed on the welding seat.

[0023] By adopting the above technical solution, after the second handling robot moves the cylinder blank to the fourth conveying device, the fourth handling robot moves the cylinder blank to the placement rack, and then the welding assembly welds the protective cover and bottom ring to the cylinder blank.

[0024] Optionally, the welding assembly includes a welding cylinder disposed on a welding seat and electrically connected to a control system, a welding plate disposed on the piston rod of the welding cylinder, a welding frame slidably disposed on the welding seat, a welding gun head disposed on the welding frame, the welding gun head being used for welding the protective cover and the bottom ring, a welding screw rotatably disposed on the welding seat, the welding frame being threadedly connected to the welding screw, a guide rod disposed on the welding seat, the welding frame being slidably sleeved on the guide rod, a sliding motor electrically connected to the control system disposed on the welding seat, and the welding screw being coaxially disposed on the output shaft of the sliding motor.

[0025] By adopting the above technical solution, the control system starts the welding cylinder. The welding cylinder drives the protective cover and bottom ring on the welding three-jaw chuck to gradually approach the steel pipe blank through the welding plate. After the protective cover and bottom ring are both in contact with the steel pipe blank, the control system starts the sliding motor. The sliding motor drives the welding frame to slide through the welding screw, so that the welding gun head on the welding frame points to the position to be welded. Then, the control system starts the welding motor to work, so that the protective cover, the steel cylinder blank and the bottom ring rotate synchronously to obtain the steel cylinder. Finally, the fourth handling robot arm transports the finished steel cylinder to the fourth conveying device.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. During the transportation process from steel pipe to steel pipe blank, then to steel cylinder blank, and finally to steel cylinder, the first, second, third, fourth and fifth conveying devices are all equipped with restraints. Under the restraint of the restraints, the cylinder is transported in a stable state, reducing the possibility of it leaving the conveying device and helping to improve the qualification rate of the finished product. 2. Under the constraint of the constraint cones on the conveying rollers, the steel pipe blank is always between the constraint cones at both ends of the conveying rollers. The control system starts the conveying motor, and the conveying motor drives all the conveying rollers on the conveying frame to rotate through the combined action of the synchronous belt and synchronous pulley, so that the steel pipe is stably conveyed on the conveying frame, which helps to reduce the possibility of the steel pipe blank leaving the conveying frame during the conveying process. 3. The second handling robot moves the cylinder blank from the third conveying device to the open-end three-jaw chuck on the open-end seat, and makes the valve seat end of the cylinder blank face away from the open-end three-jaw chuck. Then, the control system starts the open-end motor, which drives the cylinder blank to rotate through the open-end three-jaw chuck. At the same time, the control system starts the conversion motor to rotate, so that the milling cutter, drill bit and tap on the open-end plate are aligned with the valve seat end of the cylinder blank in sequence. At the same time, the control system starts the open-end cylinder to push the open-end plate repeatedly close to the cylinder blank, thereby opening the cylinder blank. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0028] Figure 2 This is a structural diagram showing the positional relationship between the cutting frame, the conveyor frame, and the heating box in an embodiment of this application.

[0029] Figure 3 This is a structural schematic diagram showing the positional relationship between the clamping motor, the clamping rod, and the rotating motor in an embodiment of this application.

[0030] Figure 4 This is a structural schematic diagram showing the positional relationship between the transverse cylinder, the spinning disc, and the longitudinal cylinder in an embodiment of this application.

[0031] Figure 5 This is a structural schematic diagram showing the positional relationship between the opening plate, air pump, and opening motor in an embodiment of this application.

[0032] Figure 6 This is a structural schematic diagram showing the positional relationship between the welding frame, the sliding motor, and the welding motor in an embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 01. Cylinder preform; 02. Protective cover; 03. Bottom ring; 04. Valve seat; 1. First conveying device; 101. Conveying frame; 102. Conveying roller; 103. Synchronous pulley; 104. Synchronous belt; 105. Conveying motor; 2. Steel pipe; 3. Unloading device; 31. Cutting frame; 32. Material blocking cylinder; 33. Material blocking plate; 34. Cutting nozzle; 35. Rotating assembly; 351. Bidirectional screw; 352. Clamping motor; 353. Clamping rod; 354. Guide rod; 35 5. Drive wheel; 356. Rotary motor; 4. Second conveying device; 5. Transfer component; 51. Transfer rack; 52. Tilting cylinder; 6. First handling robot; 7. Third conveying device; 8. Hot spinning device; 800. Mounting base; 801. Spinning three-jaw chuck; 802. Mounting motor; 803. Spinning plate; 804. Horizontal cylinder; 805. Spinning seat; 806. Longitudinal cylinder; 807. Spinning motor; 808. Spinning disc; 809. Spinning knife; 810. Spinning spray gun; 9 10. Second handling robot; 11. Third handling robot; 12. Opening device; 13. Opening seat; 14. Opening three-jaw chuck; 15. Opening motor; 16. Opening plate; 17. Opening cylinder; 18. Opening disc; 19. Conversion motor; 10. Milling cutter; 10. Drill bit; 10. Tap; 111. Air tightness testing device; 122. Pressurization pipe; 13. Air pump; 14. Hose; 15. Pressure valve; 16. Welding device; 17. Fourth handling robot; 18. Opening seat; 19. Opening three-jaw chuck; 10. Opening motor; 10. Third handling robot; 11. Opening device; 12. Third handling robot; 13. Fourth handling robot; 14. Opening device; 15. Opening seat; 16. Opening three-jaw chuck; 17. Opening motor; 18. Opening plate; 19. Third handling cylinder; 10. Opening plate; 10. Third handling cylinder; 11. Fourth handling robot; 12. Third handling robot; 13. Fourth handling robot; 14. Third handling robot; 15. Fourth handling robot; 16. Third handling robot; 17. Fourth handling robot; 18. Third handling robot; 19. Fourth handling robot; 10. Third handling robot; 10. Fourth handling robot; 12. Third handling robot; 13. Fourth handling robot; 14. Third handling robot; 15. Third handling robot; 16. Fourth handling robot; 17. Third handling robot; 18. Fourth handling robot; 19. Third handling robot; 10. Fourth handling robot; 12. Third handling robot; 11. Fourth handling robot; 12. Third handling robot; 13. Fourth handling robot; 14. Third handling robot; 15. Third handling robot; 16 132. Robotic arm; 133. Welding seat; 134. Placement rack; 135. Welding plate; 136. Welding three-jaw chuck; 137. Welding motor; 138. Welding assembly; 139. Welding cylinder; 100. Welding frame; 110. Welding gun head; 120. Welding screw; 131. Guide rod; 122. Sliding motor; 133. Fourth conveying device; 14. Fifth conveying device; 15. Constraint component; 161. Constraint cone; 17. Heating box; 18. Anti-detachment plate; 19. Bearing wheel. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a steel cylinder welding production line.

[0036] Reference Figure 1 A steel cylinder welding production line includes a first conveying device 1, a second conveying device 4, a third conveying device 7, a fourth conveying device 14, a fifth conveying device 15, a feeding device 3, a hot spinning device 8, an opening device 11, an airtightness testing device 12, and a welding device 13. The first conveying device 1, the second conveying device 4, the third conveying device 7, the fourth conveying device 14, and the fifth conveying device 15 are all the same.

[0037] Reference Figure 1 and Figure 2 The first conveying device 1 includes a conveying frame 101, on which a plurality of conveying rollers 102 are rotatably arranged. The plurality of conveying rollers 102 are arranged along the conveying direction of the steel pipe 2. The steel pipe 2 is conveyed on the plurality of conveying rollers 102. Synchronous pulleys 103 are coaxially welded on the conveying rollers 102. The synchronous pulleys 103 are made of heat-resistant metal in the prior art. A synchronous belt 104 is rotatably mounted on the plurality of synchronous pulleys 103. The synchronous belt 104 is a heat-resistant metal track type in the prior art.

[0038] Reference Figure 1 , Figure 2 and Figure 3 A conveyor motor 105, which is electrically connected to the control system, is bolted to the conveyor frame 101. The conveyor motor 105 is a forward and reverse motor in the prior art. The output shaft of the conveyor motor 105 is coaxially welded to one of the conveyor rollers 102. A constraint member 16 of a constraint steel pipe 2 is arranged on the first conveying device 1. The constraint member 16 includes constraint cones 161 welded to both ends of the conveyor roller 102. The diameter of the constraint cones 161 gradually increases from the center of the axis of the conveyor roller 102 towards both ends.

[0039] Under the constraint of the constraint cones 161 at both ends of the conveyor roller 102, the steel pipe 2 is always in the middle position of the conveyor roller 102. Then the control system starts the conveyor motor 105 to rotate in the forward direction. The conveyor motor 105 drives all the conveyor rollers 102 on the same conveyor frame 101 to rotate in the same direction through the combined action of the synchronous belt 104 and the synchronous pulley 103, so that the steel pipe 2 is stably conveyed on multiple conveyor rollers 102.

[0040] Reference Figure 1 , Figure 2 and Figure 3 The first conveying device 1 is equipped with a feeding device 3 for cutting steel pipes 2. The feeding device 3 includes a cutting frame 31 mounted on the first conveying device 1. A baffle cylinder 32 electrically connected to the control system is bolted to the cutting frame 31. A baffle plate 33 is welded to the piston rod of the baffle cylinder 32. The baffle plate 33 is used to block the steel pipes 2. A cutting nozzle 34 is bolted to the cutting frame 31. The cutting nozzle 34 is used to cut the steel pipes 2. A rotating assembly 35 for rotating the steel pipes 2 is arranged on the cutting frame 31.

[0041] Reference Figure 1 , Figure 2 and Figure 3The rotating assembly 35 includes a bidirectional screw 351 rotatably arranged on the cutting frame 31. A clamping motor 352 electrically connected to the control system is bolted to the cutting frame 31. The bidirectional screw 351 is coaxially welded to the output shaft of the clamping motor 352. Clamping rods 353 are arranged on both sides of the steel pipe 2 in the conveying direction. The clamping rods 353 are threaded to both ends of the bidirectional screw 351.

[0042] Reference Figure 1 , Figure 2 and Figure 3 A guide rod 354 parallel to the axis of the bidirectional screw 351 is welded onto the cutting frame 31. A clamping rod 353 is slidably sleeved on the guide rod 354. A drive wheel 355 is rotatably arranged on the clamping rod 353. The drive wheel 355 is used to abut against the outer wall of the steel pipe 2. A rotary motor 356 electrically connected to the control system is bolted onto the clamping rod 353. The drive wheel 355 is coaxially welded to the output shaft of the rotary motor 356.

[0043] When the steel pipe 2 on the first conveying device 1 is conveyed to a certain position, the control system starts the blocking cylinder 32 to work. The blocking cylinder 32 extends its piston rod to drive the blocking plate 33 to block the steel pipe 2 from continuing to move. At the same time, the control system controls the conveying motor 105 to stop working. Simultaneously, the control system starts the clamping motor 352 to rotate. The clamping motor 352 drives the bidirectional screw 351 to rotate in the forward direction. The bidirectional screw 351 drives the two clamping rods 353 on it to move closer to the steel pipe 2 at the same time.

[0044] The drive wheel 355 on the clamping rod 353 abuts against the outer wall of the steel pipe 2. Then the control system starts the rotating motor 356 on the clamping rod 353, so that the rotating motors 356 on the two clamping rods 353 rotate in the same direction. Then, the friction between the drive wheel 355 and the outer wall of the steel pipe 2 drives the steel pipe 2 to rotate. At this time, the cutting nozzle 34 cuts the rotating steel pipe 2, and the cutting length is the distance between the baffle plate 33 and the cutting nozzle 34.

[0045] Reference Figure 1 and Figure 2 A second conveying device 4 is arranged next to the first conveying device 1. A transfer component 5 is arranged between the first conveying device 1 and the second conveying device 4. The transfer component 5 includes a transfer rack 51 rotatably arranged on the conveying frame 101 of the second conveying device 4. One end of the transfer rack 51 away from its rotation center is placed on the conveying frame 101 of the first conveying device 1.

[0046] Reference Figure 1 and Figure 2An anti-detachment plate 18 is welded to the conveyor frame 101 of the second conveying device 4 on the side opposite to the first conveying device 1. A tilting cylinder 52 electrically connected to the control system is rotatably connected to the conveyor frame 101 of the second conveying device 4. The piston rod of the tilting cylinder 52 is hinged to the material transfer frame 51.

[0047] When the cut steel pipe blank 2 is conveyed to the transfer rack 51, the control system activates the tilting cylinder 52. The tilting cylinder 52 drives the transfer rack 51 to rotate around its rotation center through its piston rod, so that the steel pipe blank 2 on the first conveying device 1's conveying rack 101 rolls to the second conveying device 4's conveying rack 101, and falls onto the second conveying device 4's conveying rack 101 under the obstruction of the anti-detachment plate 18 on the second conveying device 4's conveying rack 101.

[0048] Reference Figure 1 and Figure 4 The second conveying device 4 has a first handling robot 6 at one end, which is used to handle the cut steel pipe 2. The first handling robot 6 is arranged next to the first handling robot 6, and a third conveying device 7 and a hot spinning device 8 are arranged next to it. The hot spinning device 8 is used to spin the heated steel pipe 2 into a steel cylinder blank 01. A heating box 17 is arranged on the second conveying device 4.

[0049] Reference Figure 1 , Figure 2 and Figure 4 The hot spinning device 8 includes a mounting base 800, a spinning three-jaw chuck 801 rotatably arranged on the mounting base 800, a mounting motor 802 for driving the spinning three-jaw chuck 801 to rotate and electrically connected to the control system, a spinning plate 803 laterally slidably arranged on the mounting base 800, and a transverse cylinder 804 electrically connected to the control system arranged on the mounting base 800. The spinning plate 803 is arranged on the piston rod of the transverse cylinder 804.

[0050] Reference Figure 1 and Figure 4 A spinning base 805 is slidably arranged on the spinning plate 803. A longitudinal cylinder 806 electrically connected to the control system is arranged on the spinning plate 803. The spinning base 805 is arranged on the piston rod of the longitudinal cylinder 806. A spinning motor 807 electrically connected to the control system is arranged on the spinning base 805. A spinning disc 808 is arranged on the output shaft of the spinning motor 807. A spinning knife 809 is arranged on the spinning disc 808. A spinning spray gun 810 is arranged on the spinning base 805.

[0051] Reference Figure 1 and Figure 4The spinning spray gun 810 is used to heat the cylinder blank 01. The third conveying device 7 is arranged with a second handling robot 9 and a third handling robot 10. An opening device 11 and an airtightness detection device 12 are arranged between the second handling robot 9 and the third handling robot 10. The fifth conveying device 15 is arranged with the third handling robot 10. The fifth conveying device 15 is used to convey the cylinder blank 01 that does not meet the airtightness requirements.

[0052] The control system controls the conveyor motor 105 on the conveyor frame 101 of the second conveying device 4 to rotate in the reverse direction, so that the steel pipe blank 2 on it is conveyed into the heating box 17. After a period of time, the control system starts the conveyor motor 105 to rotate in the forward direction, so that the heated steel pipe blank 2 is conveyed to the first handling robot 6. Then the first handling robot 6 carries the heated steel pipe blank 2 to the spinning three-jaw chuck 801 on the mounting base 800 for clamping.

[0053] Then, the control system starts the installation motor 802, which drives the spinning three-jaw chuck 801 on the installation base 800 to rotate. At the same time, the control system starts the horizontal cylinder 804 to push the spinning plate 803 to move, the vertical cylinder 806 to push the spinning seat 805 to move, and the spinning motor 807 to rotate, so that the spinning knife 809 on the spinning plate 808 spins the end of the steel pipe blank 2. At the same time, during the spinning process, the spinning spray gun 810 continuously heats the steel pipe blank 2.

[0054] One end of the steel pipe blank 2 is left with a valve seat port 04 for opening the valve seat port 04. Then, the control system controls the installation motor 802 to stop rotating. The first handling robot 6 flips the steel pipe blank 2 and clamps it again with the spinning three-jaw chuck 801. The control system controls the installation motor 802 to start rotating again. Finally, the other end of the cylinder blank 01 is spun out without leaving the valve seat port 04. The control system controls the installation motor 802 to stop rotating again. After this, the first handling robot 6 transports the processed cylinder blank 01 to the third conveying device 7.

[0055] Reference Figure 1 and Figure 5 The opening device 11 is used to open the valve seat port 04 of the cylinder blank 01. The opening device 11 includes an opening seat 110, an opening three-jaw chuck 111 rotatably arranged on the opening seat 110, an opening motor 112 for driving the opening three-jaw chuck 111 to rotate and electrically connected to the control system is bolted to the opening seat 110, an opening plate 113 is slidably arranged on the opening seat 110, and an opening cylinder 114 electrically connected to the control system is bolted to the opening seat 110.

[0056] Reference Figure 1 and Figure 5An opening plate 113 is bolted to the piston rod of an opening cylinder 114. An opening disc 115 is rotatably arranged on the opening plate 113. A conversion motor 116 electrically connected to the control system is bolted to the opening plate 113. The opening disc 115 is coaxially welded to the output shaft of the conversion motor 116. A milling cutter 117, a drill bit 118, and a tap 119 are bolted to the opening disc 115.

[0057] Reference Figure 1 and Figure 5 The air tightness testing device 12 is used to test the air tightness of the cylinder blank 01 after the valve seat port 04 is opened. The air tightness testing device 12 includes a pressurizing pipe 121 bolted to the opening plate 115. The pressurizing pipe 121 is used to insert into the valve seat port 04 and pressurize the cylinder blank 01. An air pump 122 electrically connected to the control system is arranged next to the opening plate 110. A hose 123 is connected between the air pump 122 and the pressurizing pipe 121. The hose 123 passes through the opening plate 115 and a pressure valve 124 is connected to the hose 123. The pressure valve 124 is electrically connected to the control system.

[0058] The second handling robot 9 moves the cylinder blank 01 on the third conveying device 7 to the open three-jaw chuck 111 on the open seat 110 for clamping. At the same time, the valve seat end of the cylinder blank 01 faces away from the open three-jaw chuck 111. Then the control system starts the open motor 112, which drives the cylinder blank 01 to rotate through the open three-jaw chuck 111. At the same time, the control system starts the conversion motor 116 to rotate.

[0059] The milling cutter 117, drill bit 118, tap 119 and pressurizing tube 121 on the open plate 115 are aligned sequentially with the valve seat end of the cylinder blank 01. After each alignment with the valve seat end of the cylinder blank 01, the control system starts the open cylinder 114 to push the open plate 113 to repeatedly approach and move away from the cylinder blank 01. When the pressurizing tube 121 is inserted into the valve seat port 04 of the cylinder blank 01, the control system starts the air pump 122 to fill the cylinder blank 01 with a certain amount of high-pressure gas.

[0060] Then the control system controls the air pump 122 to stop filling. The control system monitors the pressure value transmitted on the pressure valve 124. After a period of time, the open cylinder 114 drives the pressurizing pipe 121 to detach from the cylinder blank 01 through the open plate 113. When the control system monitors that the pressure value on the pressure valve 124 has no change, the second handling robot 9 will transport the cylinder blank 01 to the welding device 13. Otherwise, the third handling robot 10 will transport the cylinder blank 01 to the conveyor frame 101 of the fifth conveying device 15.

[0061] Reference Figure 1 and Figure 6A welding device 13 is arranged next to the second handling robot 9. A fourth conveying device 14 is arranged between the airtightness testing device 12 and the welding device 13. The welding device 13 includes a fourth handling robot 131 arranged next to the fourth conveying device 14. A welding seat 132 is arranged next to the fourth handling robot 131. A placement rack 133 is arranged on the welding seat 132. The placement rack 133 is used to place the gas cylinder blank 01 that has passed the airtightness test.

[0062] Reference Figure 1 and Figure 6 Welding plates 134 are slidably arranged on the welding seat 132 at both ends of the cylinder blank 01. Welding three-jaw chucks 135 are rotatably arranged on the welding plate 134. Welding motors 136 are arranged on the welding plate 134 to drive the welding three-jaw chucks 135 to rotate and are electrically connected to the control system. The welding three-jaw chucks 135 on the welding plates 134 at both ends of the cylinder blank 01 are used to clamp the protective cover 02 and the bottom ring 03, respectively. Welding components 137 for welding the protective cover 02 and the bottom ring 03 are arranged on the welding seat 132.

[0063] Reference Figure 1 and Figure 6 The welding assembly 137 includes a welding cylinder 1371 disposed on a welding seat 132 and electrically connected to a control system, a welding plate 134 disposed on the piston rod of the welding cylinder 1371, a welding frame 1372 slidably disposed on the welding seat 132, a bearing wheel 19 rotatably connected to the welding frame 1372, and a welding gun head 1373 disposed on the welding frame 1372. The welding gun head 1373 is used for welding the protective cover 02 and the bottom ring 03.

[0064] Reference Figure 1 and Figure 6 A welding screw 1374 is rotatably arranged on the welding seat 132. The welding frame 1372 is threadedly connected to the welding screw 1374. A guide rod 1375 is arranged on the welding seat 132. The welding frame 1372 is slidably sleeved on the guide rod 1375. A sliding motor 1376 electrically connected to the control system is arranged on the welding seat 132. The welding screw 1374 is coaxially arranged on the output shaft of the sliding motor 1376.

[0065] After the second handling robot 9 moves the cylinder blank 01 to the fourth conveying device 14, the fourth handling robot 131 moves the cylinder blank 01 to the placement rack 133. The control system starts the welding cylinder 1371. The welding cylinder 1371 drives the protective cover 02 and the bottom ring 03 on the welding three-jaw chuck 135 located at both ends of the cylinder blank 01 to gradually approach the steel pipe blank 2 until the protective cover 02 and the bottom ring 03 are both in contact with the steel pipe blank 2.

[0066] The control system controls the sliding motor 1376 to work. The sliding motor 1376 rotates in the forward direction and drives the welding frame 1372 to approach the steel pipe blank 2 through the welding screw 1374. After the welding gun head 1373 on the welding frame 1372 points to the position to be welded, the control system starts the welding motor 136 to work, so that the protective cover 02, the steel cylinder blank 01 and the bottom ring 03 rotate synchronously. After a period of time.

[0067] The control system controls the welding motor 136 to stop rotating. At the same time, the control system controls the sliding motor 1376 to rotate in the opposite direction to reset the welding frame 1372. The control system controls the welding three-jaw chuck 135 to release the protective cover 02 and the bottom ring 03. At the same time, the control system starts the welding cylinder 1371 to reset. Finally, the fourth handling robot 131 transports the finished steel cylinder to the fourth conveying device 14 and transports it away.

[0068] The implementation principle of a steel cylinder welding production line according to an embodiment of this application is as follows: Under the constraint of the constraint cones 161 at both ends of the conveyor roller 102, the steel pipe 2 is always in the middle position of the conveyor roller 102. Then, the control system starts the conveyor motor 105 to rotate in the forward direction. Under the combined action of the synchronous belt 104 and the synchronous pulley 103, the conveyor motor 105 drives all the conveyor rollers 102 on the same conveyor frame 101 to rotate in the same direction, so that the steel pipe 2 is stably conveyed on multiple conveyor rollers 102.

[0069] When the steel pipe 2 on the first conveying device 1 is conveyed to a certain position, the control system starts the blocking cylinder 32 to work. The blocking cylinder 32 extends its piston rod to drive the blocking plate 33 to block the steel pipe 2 from continuing to move. At the same time, the control system controls the conveying motor 105 to stop working. Simultaneously, the control system starts the clamping motor 352 to rotate. The clamping motor 352 drives the bidirectional screw 351 to rotate in the forward direction. The bidirectional screw 351 drives the two clamping rods 353 on it to move closer to the steel pipe 2 at the same time.

[0070] The drive wheel 355 on the clamping rod 353 abuts against the outer wall of the steel pipe 2. Then the control system starts the rotating motor 356 on the clamping rod 353, so that the rotating motors 356 on the two clamping rods 353 rotate in the same direction. Then, the friction between the drive wheel 355 and the outer wall of the steel pipe 2 drives the steel pipe 2 to rotate. At this time, the cutting nozzle 34 cuts the rotating steel pipe 2, and the cutting length is the distance between the baffle plate 33 and the cutting nozzle 34.

[0071] When the cut steel pipe blank 2 is conveyed to the transfer rack 51, the control system activates the tilting cylinder 52. The tilting cylinder 52 drives the transfer rack 51 to rotate around its rotation center through its piston rod, so that the steel pipe blank 2 on the first conveying device 1's conveying rack 101 rolls to the second conveying device 4's conveying rack 101, and falls onto the second conveying device 4's conveying rack 101 under the obstruction of the anti-detachment plate 18 on the second conveying device 4's conveying rack 101.

[0072] The control system controls the conveyor motor 105 on the conveyor frame 101 of the second conveying device 4 to rotate in the reverse direction, so that the steel pipe blank 2 on it is conveyed into the heating box 17. After a period of time, the control system starts the conveyor motor 105 to rotate in the forward direction, so that the heated steel pipe blank 2 is conveyed to the first handling robot 6. Then the first handling robot 6 carries the heated steel pipe blank 2 to the spinning three-jaw chuck 801 on the mounting base 800 for clamping.

[0073] Then, the control system starts the installation motor 802, which drives the spinning three-jaw chuck 801 on the installation base 800 to rotate. At the same time, the control system starts the horizontal cylinder 804 to push the spinning plate 803 to move, the vertical cylinder 806 to push the spinning seat 805 to move, and the spinning motor 807 to rotate, so that the spinning knife 809 on the spinning plate 808 spins the end of the steel pipe blank 2. At the same time, during the spinning process, the spinning spray gun 810 continuously heats the steel pipe blank 2.

[0074] One end of the steel pipe blank 2 is left with a valve seat port 04 for opening the valve seat port 04. Then, the control system controls the installation motor 802 to stop rotating. The first handling robot 6 flips the steel pipe blank 2 and clamps it again with the spinning three-jaw chuck 801. The control system controls the installation motor 802 to start rotating again. Finally, the other end of the cylinder blank 01 is spun out without leaving the valve seat port 04. The control system controls the installation motor 802 to stop rotating again. After this, the first handling robot 6 transports the processed cylinder blank 01 to the third conveying device 7.

[0075] The second handling robot 9 moves the cylinder blank 01 on the third conveying device 7 to the open three-jaw chuck 111 on the open seat 110 for clamping. At the same time, the valve seat end of the cylinder blank 01 faces away from the open three-jaw chuck 111. Then the control system starts the open motor 112, which drives the cylinder blank 01 to rotate through the open three-jaw chuck 111. At the same time, the control system starts the conversion motor 116 to rotate.

[0076] The milling cutter 117, drill bit 118, tap 119 and pressurizing tube 121 on the open plate 115 are aligned sequentially with the valve seat end of the cylinder blank 01. After each alignment with the valve seat end of the cylinder blank 01, the control system starts the open cylinder 114 to push the open plate 113 to repeatedly approach and move away from the cylinder blank 01. When the pressurizing tube 121 is inserted into the valve seat port 04 of the cylinder blank 01, the control system starts the air pump 122 to fill the cylinder blank 01 with a certain amount of high-pressure gas.

[0077] Then the control system controls the air pump 122 to stop filling. The control system monitors the pressure value transmitted on the pressure valve 124. After a period of time, the open cylinder 114 drives the pressurizing pipe 121 to detach from the cylinder blank 01 through the open plate 113. When the control system monitors that the pressure value on the pressure valve 124 has no change, the second handling robot 9 will transport the cylinder blank 01 to the welding device 13. Otherwise, the third handling robot 10 will transport the cylinder blank 01 to the conveyor frame 101 of the fifth conveying device 15.

[0078] After the second handling robot 9 moves the cylinder blank 01 to the fourth conveying device 14, the fourth handling robot 131 moves the cylinder blank 01 to the placement rack 133. The control system starts the welding cylinder 1371. The welding cylinder 1371 drives the protective cover 02 and the bottom ring 03 on the welding three-jaw chuck 135 located at both ends of the cylinder blank 01 to gradually approach the steel pipe blank 2 until the protective cover 02 and the bottom ring 03 are both in contact with the steel pipe blank 2.

[0079] The control system controls the sliding motor 1376 to work. The sliding motor 1376 rotates in the forward direction and drives the welding frame 1372 to approach the steel pipe blank 2 through the welding screw 1374. After the welding gun head 1373 on the welding frame 1372 points to the position to be welded, the control system starts the welding motor 136 to work, so that the protective cover 02, the steel cylinder blank 01 and the bottom ring 03 rotate synchronously. After a period of time.

[0080] The control system controls the welding motor 136 to stop rotating. At the same time, the control system controls the sliding motor 1376 to rotate in the opposite direction to reset the welding frame 1372. The control system controls the welding three-jaw chuck 135 to release the protective cover 02 and the bottom ring 03. At the same time, the control system starts the welding cylinder 1371 to reset. Finally, the fourth handling robot 131 transports the finished steel cylinder to the fourth conveying device 14 and transports it away.

[0081] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel cylinder welding production line, characterized in that: The system includes a first conveying device (1) on which a steel pipe (2) is conveyed. A cutting device (3) for cutting the steel pipe (2) is installed on the first conveying device (1). A second conveying device (4) is installed beside the first conveying device (1). A transfer component (5) is installed between the first conveying device (1) and the second conveying device (4). A first handling robot (6) is installed at one end of the second conveying device (4) for handling the cut steel pipe (2). A third conveying device (7) and a hot spinning device (8) are installed beside the first handling robot (6) for spinning the heated steel pipe (2) into a steel cylinder blank (01). A second handling robot (9) and a third handling robot (10) are installed beside the third conveying device (7). An opening device (11) and an airtightness testing device are installed between the second handling robot (9) and the third handling robot (10). The device (12) includes an opening device (11) for opening the valve seat port (04) of the cylinder blank (01), an airtightness testing device (12) for testing the airtightness of the cylinder blank (01) after the valve seat port (04) is opened, a welding device (13) is provided next to the second handling robot (9), and a fourth conveying device (14) is provided between the airtightness testing device (12) and the welding device (13). The welding device (13) is used to weld the cylinder blank (01) after it has been opened. Welding cover (02) and bottom ring (03), a fifth conveying device (15) is provided on the side of the third handling robot (10), the fifth conveying device (15) is used to convey the gas cylinder blank (01) with unqualified air tightness, the first conveying device (1), the second conveying device (4), the third conveying device (7), the fourth conveying device (14) and the fifth conveying device (15) are all the same, the first conveying device (1) is provided with a constraint member (16) for constraining the steel pipe (2); The second conveying device (4) is equipped with a heating box (17). The hot spinning device (8) includes a mounting base (800), on which a spinning three-jaw chuck (801) is rotatably mounted. A mounting motor (802) for driving the spinning three-jaw chuck (801) to rotate and electrically connected to the control system is mounted on the mounting base (800). A spinning plate (803) is laterally slidably mounted on the mounting base (800). A transverse cylinder (804) electrically connected to the control system is mounted on the mounting base (800). The spinning plate (803) is mounted on the piston rod of the transverse cylinder (804). A spinning seat (805) is slidably disposed on the spinning plate (803). A longitudinal cylinder (806) electrically connected to the control system is disposed on the spinning plate (803). The spinning seat (805) is disposed on the piston rod of the longitudinal cylinder (806). A spinning motor (807) electrically connected to the control system is disposed on the spinning seat (805). A spinning disc (808) is disposed on the output shaft of the spinning motor (807). A spinning knife (809) is disposed on the spinning disc (808). A spinning spray gun (810) is disposed on the spinning seat (805). The spinning spray gun (810) is used for heating the cylinder preform (01). The opening device (11) includes an opening seat (110), on which an opening three-jaw chuck (111) is rotatably mounted. An opening motor (112) for driving the opening three-jaw chuck (111) to rotate and electrically connected to the control system is also mounted on the opening seat (110). An opening plate (113) is slidably mounted on the opening seat (110), and an opening cylinder (114) electrically connected to the control system is also mounted on the opening seat (110). The opening plate (113) is disposed on the piston rod of the opening cylinder (114). An opening disk (115) is rotatably disposed on the opening plate (113). The opening plate (113) is provided with a conversion motor (116) electrically connected to the control system. The opening disk (115) is coaxially disposed on the output shaft of the conversion motor (116). A milling cutter (117), a drill bit (118), and a tap (119) are disposed on the opening disk (115).

2. The steel cylinder welding production line according to claim 1, characterized in that: The first conveying device (1) includes a conveying frame (101), on which a plurality of conveying rollers (102) are rotatably arranged. The plurality of conveying rollers (102) are arranged along the conveying direction of the steel pipe (2). A synchronous pulley (103) is provided on the conveying roller (102). A synchronous belt (104) is rotatably sleeved on the plurality of synchronous pulleys (103). A conveying motor (105) electrically connected to the control system is provided on the conveying frame (101). The output shaft of the conveying motor (105) is coaxially arranged on one of the conveying rollers (102). The constraint member (16) includes constraint cones (161) provided at both ends of the conveying roller (102). The diameter of the constraint cones (161) gradually increases from the center of the axis of the conveying roller (102) towards both ends.

3. The steel cylinder welding production line according to claim 1, characterized in that: The feeding device (3) includes a cutting frame (31) mounted on the first conveying device (1), a baffle cylinder (32) electrically connected to the control system mounted on the cutting frame (31), a baffle plate (33) mounted on the piston rod of the baffle cylinder (32), the baffle plate (33) being used to block the steel pipe (2), a cutting nozzle (34) mounted on the cutting frame (31), the cutting nozzle (34) being used to cut the steel pipe (2), and a rotating assembly (35) mounted on the cutting frame (31) for rotating the steel pipe (2).

4. The steel cylinder welding production line according to claim 3, characterized in that: The rotating assembly (35) includes a bidirectional screw (351) rotatably mounted on a cutting frame (31). A clamping motor (352) electrically connected to a control system is mounted on the cutting frame (31). The bidirectional screw (351) is coaxially mounted on the output shaft of the clamping motor (352). Clamping rods (353) are provided on both sides of the steel pipe (2) in the conveying direction. The clamping rods (353) are threaded to both ends of the bidirectional screw (351). The cutting frame (31)... A guide rod (354) parallel to the axis of the bidirectional screw (351) is provided. The clamping rod (353) is slidably sleeved on the guide rod (354). A drive wheel (355) is rotatably provided on the clamping rod (353). The drive wheel (355) is used to abut against the outer wall of the steel pipe (2). A rotary motor (356) electrically connected to the control system is provided on the clamping rod (353). The drive wheel (355) is coaxially provided on the output shaft of the rotary motor (356).

5. A steel cylinder welding production line according to claim 2, characterized in that: The transfer component (5) includes a transfer rack (51) rotatably mounted on the conveyor frame (101) of the second conveying device (4). One end of the transfer rack (51) away from its rotation center is placed on the conveyor frame (101) of the first conveying device (1). A tilting cylinder (52) electrically connected to the control system is rotatably mounted on the conveyor frame (101) of the second conveying device (4). The piston rod of the tilting cylinder (52) is hinged to the transfer rack (51).

6. A steel cylinder welding production line according to claim 1, characterized in that: The airtightness testing device (12) includes a pressurizing tube (121) disposed on an open plate (115). The pressurizing tube (121) is used to insert into the valve seat port (04) and pressurize the gas cylinder blank (01). An air pump (122) electrically connected to the control system is disposed on one side of the open plate (110). A hose (123) is connected between the air pump (122) and the pressurizing tube (121). A pressure valve (124) is connected to the hose (123). The pressure valve (124) is electrically connected to the control system.

7. A steel cylinder welding production line according to claim 1, characterized in that: The welding device (13) includes a fourth handling robot (131) disposed next to a fourth conveying device (14). A welding seat (132) is disposed next to the fourth handling robot (131). A placement rack (133) is disposed on the welding seat (132). The placement rack (133) is used to place a gas cylinder blank (01) with qualified airtightness. Welding plates (134) are slidably disposed on the welding seat (132) at both ends of the gas cylinder blank (01). 34) A welding three-jaw chuck (135) is rotatably mounted on the welding plate (134). A welding motor (136) is mounted on the welding plate (134) for driving the welding three-jaw chuck (135) to rotate and is electrically connected to the control system. The welding three-jaw chucks (135) on the welding plates (134) at both ends of the cylinder blank (01) are used to clamp the protective cover (02) and the bottom ring (03) respectively. A welding assembly (137) for welding the protective cover (02) and the bottom ring (03) is mounted on the welding seat (132).

8. A steel cylinder welding production line according to claim 7, characterized in that: The welding assembly (137) includes a welding cylinder (1371) disposed on a welding seat (132) and electrically connected to a control system. A welding plate (134) is disposed on the piston rod of the welding cylinder (1371). A welding frame (1372) is slidably disposed on the welding seat (132). A welding gun head (1373) is disposed on the welding frame (1372). The welding gun head (1373) is used for welding the protective cover (02) and the bottom ring (03). A welding screw (1374) is rotatably mounted on the welding seat (132). The welding frame (1372) is threadedly connected to the welding screw (1374). A guide rod (1375) is mounted on the welding seat (132). The welding frame (1372) is slidably sleeved on the guide rod (1375). A sliding motor (1376) electrically connected to the control system is mounted on the welding seat (132). The welding screw (1374) is coaxially mounted on the output shaft of the sliding motor (1376).

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