Steel cylinder automatic welding machine

Abstract

The present application relates to the field of steel cylinder manufacturing equipment, and in particular to an automatic steel cylinder welding machine, including an automatic bottle body feeder, an automatic bottle bottom end cap feeder, an automatic bottle mouth end cap feeder, a welding station, a conveying mechanism, a positioning tool and a grasping mechanism. The positioning tool is used to position the bottle bottom end cap and the bottle mouth end cap at both ends of the bottle body to form a temporary assembly. The grasping mechanism is used to grasp the temporary assembly on the positioning tool and send it to the welding station for welding. The present application provides an automatic steel cylinder welding machine, the welding process is fully automated, the waiting time between two weldings is the action time of the grasping mechanism, and the rapid action of the grasping mechanism can make this time negligible, which greatly improves the efficiency of steel cylinder welding.

Description

Technical Field

[0001] The present application relates to the field of steel cylinder manufacturing equipment, and in particular to an automatic steel cylinder welding machine. Background Art

[0002] Steel cylinders are steel cylinders used to store high-pressure oxygen, coal gas, liquefied petroleum gas, etc. The manufacturing of steel cylinders is usually to first curl the steel plate and then weld it to form a cylindrical structure, and then weld the end caps at both ends of the cylindrical structure to form the bottle bottom and bottle mouth.

[0003] Since steel cylinders are usually used to store high-pressure gases, the welding quality requirements during the processing of steel cylinders are very high. For some relatively small steel cylinders (less than 1 meter in length), some companies still use manual welding of small steel cylinders because they are light and have short welds, which is easy to weld manually. However, manual welding is inefficient because the two end caps need to be positioned at both ends of the cylindrical structure with a tool before welding. Manual positioning of the end caps is slow, and it takes time to loosen the tool and remove the cylinder from the tool after welding. Summary of the invention

[0004] In order to solve the problem of low efficiency of manual welding of steel cylinders, the present application provides an automatic welding machine for steel cylinders.

[0005] The present application provides a steel cylinder automatic welding machine, which adopts the following technical solution:

[0006] An automatic welding machine for steel cylinders, comprising an automatic feeder for a bottle body, an automatic feeder for a bottom end cap, an automatic feeder for a bottle mouth end cap, a welding station, a conveying mechanism, a positioning tool and a grabbing mechanism, wherein the positioning tool is used to position the bottom end cap and the bottle mouth end cap at both ends of the bottle body to form a temporary assembly, and the grabbing mechanism is used to grab the temporary assembly on the positioning tool and send it to the welding station for welding;

[0007] The conveying mechanism is used to convey the positioning tool to the first station to receive the feeding from the bottle body automatic feeder, and the conveying mechanism is also used to convey the positioning tool to the second station to receive the feeding from the bottle bottom end cover automatic feeder and the bottle mouth end cover automatic feeder, and the conveying mechanism is also used to convey the positioning tool to the third station for the grasping mechanism to grasp the temporary assembly;

[0008] Clamping mechanisms are arranged on both sides of the welding station, and the clamping mechanisms are used to clamp the temporary assembly body along the axial direction of the temporary assembly body.

[0009] By adopting the above technical solution, when the positioning tool is located at the first station, the bottle body falls from the discharge port of the automatic bottle feeder, and the bottle body falls into the positioning tool, and then the positioning tool moves to the second station;

[0010] When the positioning tool is located at the second station, the discharging port of the bottle bottom end cap automatic feeder drops the bottle bottom end cap into the positioning tool, and the discharging port of the bottle mouth end cap automatic feeder drops the bottle mouth end cap into the positioning tool, and then the positioning tool positions the bottle bottom end cap and the bottle mouth end cap at both ends of the bottle body to form a temporary assembly, and then the positioning tool moves to the third station;

[0011] When the positioning tool is located at the third station, the grabbing mechanism grabs the joint of the temporary assembly body, the third station releases the temporary assembly body, the grabbing mechanism sends the temporary assembly body to the welding station, and then the clamping mechanism clamps the temporary assembly body, then the grabbing mechanism releases the temporary assembly body and resets it, and then starts welding. After welding is completed, the clamping mechanism releases the cylinder.

[0012] During the welding process, the positioning tooling moves to the first and second stations successively to receive the bottle body, bottle bottom end cover, and bottle mouth end cover, and then moves to the third station. When the welding of the previous cylinder is completed, the grabbing mechanism immediately grabs the temporary assembly at the third station for the next welding.

[0013] The above welding process is fully automated, and the waiting time between two weldings is the action time of the grabbing mechanism. The fast action of the grabbing mechanism can make this time negligible, thus greatly improving the welding efficiency of the cylinder.

[0014] Optionally, the positioning tooling includes a pair of jaws driven by a cylinder, and the jaws are provided with a first arc groove and a second arc groove; when the positioning tooling is located at the first station, the first arc groove is located directly below the discharge port of the automatic bottle feeder, and the inner wall of the first arc groove can fit with the bottle body; when the positioning tooling is located at the second station, the second arc groove is opposite to the end of the bottle body, and the inner wall of the second arc groove can fit with the bottle bottom end cover or the bottle mouth end cover.

[0015] By adopting the above technical solution, it is achieved that the positioning tooling receives and positions the bottle body, the bottle bottom end cap and the bottle mouth end cap.

[0016] Optionally, the gripping mechanism includes a motor mounted above the conveying mechanism, the motor drives a connected rotating plate, a telescopic cylinder is fixed on the rotating plate, two clamping cylinders are fixed on the piston rod of the telescopic cylinder, and the two clamping cylinders are respectively used to clamp the joint between the bottle body and the bottom end cover, and the joint between the bottle body and the bottle mouth end cover.

[0017] By adopting the above technical solution, the motor drives the rotating plate to rotate, so that when the piston rod of the telescopic cylinder is vertically downward, the piston rod is extended, and then the clamping cylinder clamps the temporary assembly in the positioning tool, and then the positioning tool releases the temporary assembly, and then the piston rod of the telescopic cylinder is retracted;

[0018] Then the motor drives the rotating plate to rotate, so that the piston rod of the telescopic cylinder points horizontally to the welding station, the piston rod extends, and then the clamping mechanisms on both sides of the welding station clamp the temporary assembly, and then the clamping cylinder releases the temporary assembly, and then the piston rod of the telescopic cylinder is retracted to start welding.

[0019] Optionally, the clamping mechanism includes a driving mechanism, a guide rail, and a pair of sliders, the driving mechanism is used to drive the pair of sliders to move along the length direction of the guide rail, and the facing surfaces of the pair of sliders are provided with rotatable clamping blocks, the clamping blocks are used to press the temporary assembly body along the axial direction of the temporary assembly body, and the clamping blocks are provided with a third arc groove, and the inner wall of the third arc groove can fit with the bottle bottom end cover or the bottle mouth end cover.

[0020] By adopting the above technical solution, the function of clamping the temporary assembly when a pair of clamping blocks move toward each other and releasing the temporary assembly when moving away from each other is achieved, and the active rotation of the clamping blocks can keep the welding gun stationary and complete welding around the temporary assembly.

[0021] Optionally, the automatic bottle feeder includes a storage box, the bottom of which is provided with a slope, the outer wall of which is connected to a discharge chute, the lowest point of the slope is communicated with the discharge chute, the discharge chute is provided with two second cylinders for intercepting bottle bodies, and only one bottle body can be accommodated between the piston rods of the two second cylinders.

[0022] By adopting the above technical solution, the bottle body can automatically roll down on the slope, and the second cylinder close to the storage box blocks the bottle body on the slope. When the piston rod of the second cylinder moves upward, all the bottle bodies roll downward until they are stopped by the piston rod of another second cylinder. At this time, the piston rod of the previous second cylinder moves downward to intercept all the bottle bodies except the bottle body at the very end. When unloading is required, the second cylinder releases the bottle body at the very end.

[0023] Optionally, the automatic feeder for bottom end caps and the automatic feeder for bottle mouth end caps both include an automatic feeding vibration plate and a second discharge chute, the second discharge chute is connected to the discharge port of the automatic feeding vibration plate, and the discharge port of the second discharge chute is located directly above the second workstation.

[0024] By adopting the above technical solution, the bottle bottom end cap and the bottle mouth end cap are automatically supplied to the positioning tooling.

[0025] Optionally, the conveying mechanism includes a linear guide rail, a moving seat is provided on the linear guide rail, and a positioning tool is provided on the upper surface of the moving seat.

[0026] By adopting the above technical solution, the linear guide rail can quickly move the positioning tooling to the first station, the second station and the third station.

[0027] Optionally, a liftable light shielding plate is provided between the welding station and the grabbing mechanism, and the light shielding plate is raised to allow the grabbing mechanism to pass through.

[0028] By adopting the above technical solution, the light shielding plate is lowered during welding to shield the arc light and reduce the degree of light pollution.

[0029] Optionally, the light blocking plate includes an upper plate and a lower plate which are hinged, and the upper plate is connected to a lifting mechanism.

[0030] By adopting the above technical solution, after long-term welding, foreign matter will stick to the welding head. Since the upper plate and the lower plate are hinged, it is convenient to open the lower plate to clean the welding head.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. The welding process is fully automated, greatly improving the efficiency of cylinder welding;

[0033] 2. The waiting time between two weldings is the action time of the grabbing mechanism. The fast action of the grabbing mechanism can make this time negligible, greatly improving the welding efficiency of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the automatic welding machine for steel cylinders in the embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of the structure of the positioning tool and the temporary assembly in the embodiment of the present application;

[0036] Figure 3 It is a structural schematic diagram of the automatic bottle feeder in the embodiment of the present application;

[0037] Figure 4 It is a schematic diagram of the internal structure of the welding cabinet in the embodiment of the present application.

[0038] Explanation of the accompanying reference numerals: 1. Automatic feeder for bottle body; 2. Automatic feeder for bottle bottom end cap; 3. Automatic feeder for bottle mouth end cap; 4. Welding station; 5. Conveying mechanism; 6. Positioning tooling; 7. Grasping mechanism; 8. Bottle bottom end cap; 9. Bottle mouth end cap; 10. Bottle body; 11. Temporary assembly; 12. First station; 13. Second station; 14. Third station; 15. Cylinder; 16. Clamp; 17. First arc groove; 18. Second arc groove; 19. Motor; 20. Rotating plate; 21. Telescopic cylinder; 22. Gripping jaw cylinder; 23. Clamping mechanism; 24. Guide rail; 25. Sliding block; 26. Clamping block; 27. Third arc groove; 28. Second guide rail; 29. ​​Storage box; 30. Slope; 31. Discharging chute; 32. Second cylinder; 33. Second discharging chute; 34. Linear guide rail; 35. Moving seat; 36. Light baffle; 37. Upper plate; 38. Lower plate; 39. Lifting mechanism; 40. Welding cabinet; 41. Gantry; 42. Plate; 43. Connecting rod; 44. Chute; 45. Passage. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-4 This application is described in further detail.

[0040] The present application embodiment discloses an automatic welding machine for steel cylinders. Figure 1 The automatic steel cylinder welding machine comprises an automatic bottle body feeder 1, an automatic bottle bottom end cap feeder 2, an automatic bottle mouth end cap feeder 3, a conveying mechanism 5, a grabbing mechanism 7, a positioning tool 6, and a welding cabinet 40. The conveying mechanism 5 is a moving seat 35 moving on a linear guide rail 34, and the moving seat 35 is driven by a telescopic rod or a nut seat on a lead screw. The automatic bottle body feeder 1 and the welding cabinet 40 are respectively located at the two ends of the linear guide rail 34, while the automatic bottle bottom end cap feeder 2 and the automatic bottle mouth end cap feeder 3 are respectively located on both sides of the linear guide rail 34.

[0041] Reference Figure 1 A positioning fixture 6 is provided on the upper surface of the movable seat 35 , and the positioning fixture 6 is composed of a cylinder 15 and two clamping jaws 16 . The two clamping jaws 16 are respectively fixed on piston rods which are independent of each other at two ends of the cylinder 15 , and the two clamping jaws 16 are symmetrical about the cylinder 15 .

[0042] Reference Figure 2 The clamping jaw 16 is L-shaped, and has a connected horizontal surface and a vertical surface. The horizontal surface is provided with a first arc groove 17, and the vertical surface is provided with a second arc groove 18.

[0043] Reference Figure 1 and Figure 2When the first arc groove 17 is located directly below the discharge port of the automatic bottle feeder 1, the positioning tool 6 is located at the first station 12 of the linear guide rail 34. At this time, the falling bottle body 10 just falls into the first arc groove 17, and the inner wall of the first arc groove 17 fits with the bottle body 10. At this time, the second arc groove 18 is opposite to the end of the bottle body 10.

[0044] Reference Figure 3 The automatic bottle feeder 1 is composed of a storage box 29, a discharge chute 31 and two second cylinders 32. The discharge chute 31 is fixed on the outer wall of the storage box 29, and the discharge chute 31 is connected to the inside of the storage box 29. A slope 30 is provided at the bottom of the storage box 29, and the lowest point of the slope 30 is connected to the discharge chute 31. The two second cylinders 32 are fixed on the outer wall of the discharge chute 31, and the piston rods of the second cylinders 32 extend into the discharge chute 31 to intercept the bottle 10. Only one bottle 10 can be accommodated between the piston rods of the two second cylinders 32.

[0045] Reference Figure 3 The bottle bodies 10 can automatically roll down on the slope 30, and the second cylinder 32 close to the storage box 29 blocks the bottle bodies 10 on the slope 30. When the piston rod of the second cylinder 32 moves upward, all the bottle bodies 10 roll downward until they are stopped by the piston rod of another second cylinder 32. At this time, the piston rod of the previous second cylinder 32 moves downward to intercept all the bottle bodies 10 except the bottle body 10 at the very end. When unloading is required, the second cylinder 32 releases the bottle body 10 at the very end.

[0046] Reference Figure 1 After the positioning tool 6 receives the bottle body 10 at the first station 12, the next step is to move between the bottle bottom end cap automatic feeder 2 and the bottle mouth end cap automatic feeder 3 to simultaneously receive the bottle bottom end cap 8 and the bottle mouth end cap 9. The bottle bottom end cap automatic feeder 2 and the bottle mouth end cap automatic feeder 3 are both built-in automatic feeding vibration plates in a cabinet, and the discharge port of the automatic feeding vibration plate is connected to the extended second discharge chute 33, and a hole is opened on the cabinet for the second discharge chute 33 to extend.

[0047] Reference Figure 1 The position between the discharge ports of the two second discharge chutes 33 on the linear guide 34 is the second station 13. When the positioning fixture 6 moves to the second station 13 and the piston rod of the cylinder 15 is in an extended state, the discharge ports of the two second discharge chutes 33 are respectively located directly above the first arc grooves 17 on the two clamping jaws 16. The method of controlling the bottle bottom end caps 8 and the bottle mouth end caps 9 to drop one by one on the second discharge chute 33 is the same as the method of controlling the bottle bodies 10 to drop one by one on the discharge chute 31, which is also intercepted by the two second cylinders 32.

[0048] Reference Figure 2The function of the positioning tooling 6 is to receive the bottle body 10, the bottle bottom end cover 8, and the bottle mouth end cover 9, and then control the two clamping jaws 16 to move toward each other through the cylinder 15, so that the inner wall of the second arc groove 18 fits with the bottle bottom end cover 8 or the bottle mouth end cover 9, and positions the bottle bottom end cover 8 and the bottle mouth end cover 9 at the two ends of the bottle body 10 to form a temporary assembled body 11.

[0049] Reference Figure 1 A grabbing mechanism 7 driven by a motor 19, a telescopic cylinder 21 and a clamping cylinder 22 is set up through a gantry 41 just above one end of the linear guide 34 close to the welding cabinet 40. The grabbing mechanism 7 is used to grab the temporary assembly 11 on the positioning tooling 6 and send it to the welding station 4 in the welding cabinet 40 for welding.

[0050] Reference Figure 1 The motor 19 is fixed on the gantry 41, and the rotating plate 20 is fixed on the rotating shaft of the motor 19, and the rotating axis of the rotating plate 20 is horizontal. The telescopic cylinder 21 is fixed on the rotating plate 20, and as the rotating plate 20 rotates, the piston rod of the telescopic cylinder 21 can rotate vertically and horizontally. A flat plate 42 is vertically fixed on the piston rod of the telescopic cylinder 21, and a clamping cylinder 22 is fixed at each end of the flat plate 42. The two clamping cylinders 22 are used to clamp the joints of the bottle body 10 and the bottle bottom end cover 8, and the joints of the bottle body 10 and the bottle mouth end cover 9.

[0051] Reference Figure 1 The position on the linear guide 34 directly below the gantry 41 is the third workstation 14. When the conveying mechanism 5 conveys the positioning tooling 6 to the third workstation 14, the motor 19 drives the telescopic cylinder 21 to rotate to a vertically downward state. After the piston rod of the telescopic cylinder 21 is extended, the clamping cylinder 22 can be used to clamp the temporary assembly 11.

[0052] Reference Figure 4 In addition to the welding station 4 for placing the welding gun for welding, the welding cabinet 40 also has a clamping mechanism 23 on both sides of the welding station 4. The clamping mechanism 23 is used to clamp the temporary assembly body 11 along the axial direction of the temporary assembly body 11. The clamping mechanism 23 is composed of a driving mechanism, a guide rail 24 and a pair of sliders 25. The driving mechanism is a nut seat on a telescopic rod or a lead screw. The driving mechanism is used to drive a pair of sliders 25 to move synchronously toward each other or synchronously away from each other along the length direction of the guide rail 24. A rotatable clamping block 26 is provided on the facing surfaces of the pair of sliders 25. The mechanism for driving the clamping block 26 to rotate can be built into the slider 25. The clamping block 26 is used to press the temporary assembly body 11 along the axial direction of the temporary assembly body 11. The facing ends of the two clamping blocks 26 are each provided with a third arc groove 27, and the inner wall of the third arc groove 27 can fit with the bottle bottom end cover 8 or the bottle mouth end cover 9.

[0053] Reference Figure 4The welding cabinet 40 is also provided with a lifting mechanism 39, which is composed of a third cylinder 15, a second guide rail 28, a second slider 25, and a connecting rod 43. The piston rod of the third cylinder 15 is vertically downward, the second slider 25 is fixed on the piston rod of the third cylinder 15, and the connecting rod 43 is horizontally fixed on the second slider 25. The connecting rod 43 is fixed with an upper plate 37, and a lower plate 38 is hinged at the bottom end of the upper plate 37, and the upper plate 37 can be flipped upward. The upper plate 37 and the lower plate 38 form a light shielding plate 36, which is located between the welding station 4 and the gripping mechanism 7, and is used to block the arc light emitted during welding. When the telescopic cylinder 21 horizontally delivers the temporary assembly 11 into the welding station 4, the light shielding plate 36 is in a raised state; during welding, the light shielding plate 36 is lowered to block the arc light.

[0054] Reference Figure 4 A channel 45 is opened on the wall of the welding cabinet 40, and an inclined chute 44 is fixed in the channel 45. The higher part of the chute 44 remains in the welding cabinet 40, and the lower part extends above the conveyor belt outside the welding cabinet 40. The steel cylinder released from the welding station 4 can fall on the chute 44, and then roll along the chute 44 to the conveyor belt, and the conveyor belt transports the steel cylinder to the designated location for collection.

[0055] The implementation method of the automatic cylinder welding machine proposed in the embodiment of the present application is:

[0056] When the positioning tool 6 is located at the first station 12, the bottle body 10 falls from the discharge port of the bottle body automatic feeder 1, and the bottle body 10 falls into the positioning tool 6, and then the positioning tool 6 moves to the second station 13;

[0057] When the positioning tool 6 is located at the second station 13, the discharging port of the bottle bottom end cap automatic feeder 2 drops the bottle bottom end cap 8 into the positioning tool 6, and the discharging port of the bottle mouth end cap automatic feeder 3 drops the bottle mouth end cap 9 into the positioning tool 6, and then the positioning tool 6 positions the bottle bottom end cap 8 and the bottle mouth end cap 9 at both ends of the bottle body 10 to form a temporary assembly 11, and then the positioning tool 6 moves to the third station 14;

[0058] When the positioning tool 6 is located at the third station 14, the grasping mechanism 7 grasps the joint seam of the temporary assembly body 11, the third station 14 releases the temporary assembly body 11, the grasping mechanism 7 sends the temporary assembly body 11 to the welding station 4, and then the clamping mechanism 23 clamps the temporary assembly body 11, then the grasping mechanism 7 releases the temporary assembly body 11 and resets it, and then starts welding. After welding is completed, the clamping mechanism 23 releases the cylinder.

[0059] During the welding process, the positioning tool 6 moves to the first station 12 and the second station 13 successively to receive the bottle body 10, the bottle bottom end cover 8 and the bottle mouth end cover 9, and then moves to the third station 14. When the welding of the previous cylinder is completed, the grasping mechanism 7 immediately grasps the temporary assembly 11 of the third station 14 for the next welding.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic steel cylinder welding machine, comprising an automatic bottle body feeder (1), an automatic bottle bottom end cap feeder (2), an automatic bottle mouth end cap feeder (3), and a welding station (4), characterized in that: It also includes a conveying mechanism (5), a positioning tool (6) and a grasping mechanism (7), wherein the positioning tool (6) is used to position the bottle bottom end cover (8) and the bottle mouth end cover (9) at the two ends of the bottle body (10) to form a temporary assembly (11), and the grasping mechanism (7) is used to grasp the temporary assembly (11) on the positioning tool (6) and convey it to the welding station (4) for welding; The conveying mechanism (5) is used to convey the positioning tool (6) to the first station (12) to receive the material supplied by the bottle body automatic feeder (1); the conveying mechanism (5) is also used to convey the positioning tool (6) to the second station (13) to receive the material supplied by the bottle bottom end cover automatic feeder (2) and the bottle mouth end cover automatic feeder (3); the conveying mechanism (5) is also used to convey the positioning tool (6) to the third station (14) for the grasping mechanism (7) to grasp the temporary assembly (11); Clamping mechanisms (23) are provided on both sides of the welding station (4), and the clamping mechanisms (23) are used to clamp the temporary assembly (11) along the axial direction of the temporary assembly (11). The positioning tool (6) includes a pair of clamping jaws (16) driven by a cylinder (15), and the clamping jaws (16) are provided with a first arc groove (17) and a second arc groove (18); when the positioning tool (6) is located at the first station (12), the first arc groove (17) is located directly below the discharge port of the bottle body automatic feeder (1), and the inner wall of the first arc groove (17) can be in contact with the bottle body (10); when the positioning tool (6) is located at the second station (13 ), the second arc groove (18) faces the end of the bottle body (10), and the inner wall of the second arc groove (18) can fit with the bottle bottom end cover (8) or the bottle mouth end cover (9), and the grasping mechanism (7) includes a motor (19) mounted above the conveying mechanism (5), the motor (19) drives the connected rotating plate (20), a telescopic cylinder (21) is fixed on the rotating plate (20), and two clamping claw cylinders (22) are fixed on the piston rod of the telescopic cylinder (21), and the two clamping claw cylinders (22) are respectively used to clamp the splicing part of the bottle body (10) and the bottle bottom end cover (8), and the splicing part of the bottle body (10) and the bottle mouth end cover (9).

2. The automatic steel cylinder welding machine according to claim 1 is characterized in that: The clamping mechanism (23) comprises a driving mechanism, a guide rail (24), and a pair of sliders (25). The driving mechanism is used to drive the pair of sliders (25) to move along the length direction of the guide rail (24). The facing surfaces of the pair of sliders (25) are each provided with a rotatable clamping block (26). The clamping block (26) is used to press the temporary assembly body (11) along the axial direction of the temporary assembly body (11). The clamping block (26) is provided with a third arc groove (27). The inner wall of the third arc groove (27) can fit with the bottle bottom end cover (8) or the bottle mouth end cover (9).

3. The automatic steel cylinder welding machine according to claim 1 is characterized in that: The automatic bottle body feeder (1) comprises a material storage box (29), a slope (30) is provided at the bottom of the material storage box (29), an outer wall of the material storage box (29) is connected to a discharge chute (31), the lowest point of the slope (30) is communicated with the discharge chute (31), and two second cylinders (32) for intercepting the bottle bodies (10) are provided on the discharge chute (31), and only one bottle body (10) can be accommodated between the piston rods of the two second cylinders (32).

4. The automatic steel cylinder welding machine according to claim 1 is characterized in that: The bottle bottom end cap automatic feeder (2) and the bottle mouth end cap automatic feeder (3) both comprise an automatic feeding vibration plate and a second discharge chute (33), the second discharge chute (33) being connected to a discharge port of the automatic feeding vibration plate, the discharge port of the second discharge chute (33) being located directly above the second workstation (13).

5. The automatic steel cylinder welding machine according to claim 1 is characterized in that: The conveying mechanism (5) comprises a linear guide rail (34), a movable seat (35) is provided on the linear guide rail (34), and a positioning tool (6) is provided on the upper surface of the movable seat (35).

6. The automatic steel cylinder welding machine according to claim 1 is characterized in that: A liftable light shielding plate (36) is provided between the welding station (4) and the grabbing mechanism (7); the light shielding plate (36) is lifted up to allow the grabbing mechanism (7) to pass through.

7. The automatic steel cylinder welding machine according to claim 6 is characterized in that: The light blocking plate (36) comprises an upper plate (37) and a lower plate (38) which are hingedly connected, and the upper plate (37) is connected to a lifting mechanism (39).

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