Automatic welding device for the circumferential weld of a rotating cylinder

Abstract

The present invention discloses an automatic welding device for the circumferential weld of a rotary cylinder, and relates to the technical field of rotary cylinder production. The device comprises a base and a plurality of ball bearings arranged above the base for the sliding of a rotary cylinder body, the base is provided with two groups of positioning and clamping assemblies respectively used for positioning and clamping two rotary cylinder bodies, and the base is provided with a first rotating assembly for rotating after clamping the two rotary cylinder bodies. In the process of driving the double-headed screw to rotate, the automatic welding device for the circumferential weld of a rotary cylinder can, through transmission, enable the two positioning and clamping assemblies to respectively center the two placed rotary cylinder bodies, and keep the two center-clamped bodies on the same horizontal plane, and no longer need to perform repeated lifting and lowering adjustments, thereby improving the efficiency of the circumferential welding between the two rotary cylinder bodies and improving the quality of the annular welding of the two rotary cylinder bodies.

Description

Technical Field

[0001] The invention relates to the technical field of rotary cylinder production, in particular to an automatic welding device for annular welds of a rotary cylinder. Background Art

[0002] A rotary kiln refers to a rotating calcining kiln (commonly known as a rotary kiln), which belongs to the category of building materials equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the different materials they process. Cement kilns are mainly used to calcine cement clinker, and are divided into two categories: dry-process cement kilns and wet-process cement kilns. Metallurgical chemical kilns are mainly used in the metallurgical industry for magnetization roasting of lean iron ore in steel plants; oxidation roasting of chromium and nickel iron ores; roasting of high-alumina vanadium ore in refractory plants and roasting of clinker and aluminum hydroxide in aluminum plants; and roasting of chromium ore sand and chromium ore powder and other minerals in chemical plants. Lime kilns (i.e. active lime kilns) are used to roast active lime and light-burned dolomite for use in steel plants and ferroalloy plants.

[0003] In nonferrous and ferrous metallurgy, iron, aluminum, copper, zinc, tin, nickel, tungsten, chromium, and other metals use rotary kilns as smelting equipment to sinter and roast ores, concentrates, and intermediates. For example, it is used to roast aluminum hydroxide into alumina in aluminum production; it is used to produce pellets for blast furnace ironmaking in iron smelting; the "SL / RN method" and "Krupp method" abroad use it to directly reduce iron ore; the chlorination volatilization roasting method uses it to extract tin and lead. In the ore dressing process, the rotary kiln is used to magnetize and roast the lean iron ore, so that the original weak magnetism of the ore is changed to strong magnetism, which is conducive to magnetic separation. In the chemical industry, rotary kilns are used to produce soda, calcined phosphate fertilizers, barium sulfide, etc. In the 1960s, LapPle and others in the United States invented a new process for producing phosphoric acid using a rotary kiln. This method has the advantages of low energy consumption, less electricity consumption, no need for sulfuric acid and the use of medium and low-grade phosphate rock. It was quickly promoted. Ringing often occurs in the production of rotary kilns, and most of them are cleaned manually by stopping work, but this affects production and increases production costs. The rotary kiln ring cleaning machine that has just been developed avoids this phenomenon.

[0004] During the processing of the rotary kiln's rotary drum, it is necessary to perform circumferential welding between the two rotary drums through a welding device. However, during the circumferential welding of the two rotary drums, it is not convenient to accurately position and clamp the two rotary drums on the same plane with the existing welding device, and repeated adjustments are required, which reduces the quality of the circumferential welding between the two rotary drums and reduces the welding efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic welding device for the circumferential weld of a rotary cylinder to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotating cylinder annular weld automatic welding device, comprising a base and a plurality of balls arranged above the base for the rotating cylinder body to slide, the base is provided with two groups of positioning and clamping components respectively used for positioning and clamping two rotating cylinder bodies, and the base is provided with a first rotating component used for rotating after clamping the two rotating cylinder bodies;

[0007] The positioning and clamping assembly includes two symmetrically arranged strip plates, two first mounting frames are arranged on opposite sides of the two strip plates, the first mounting frames are rotatably connected with a first rotating shaft, a positioning roller is fixed on the first rotating shaft, the rotating drum body is located between the positioning rollers of the two opposite strip plates, and the two strip plates located on the same side of the two positioning and clamping assemblies are provided with a pushing assembly for pushing the rotating drum body closer to each other during welding and a second rotating assembly for frictionally rotating the two rotating drum bodies after one end of the welding is abutted against each other, and the base is provided with a sliding assembly for sliding the two opposite strip plates.

[0008] Preferably, the sliding assembly includes a sliding groove opened on the base, a sliding plate is slidably connected to the sliding groove, the sliding plate is connected to the strip plate by a connecting assembly, a connecting plate is fixed between the two sliding plates located on the same side, and the lower end of the base is provided with a driving assembly for relative driving of the two connecting plates and a guide assembly for guiding during the driving process.

[0009] Preferably, the connecting assembly includes a plurality of sleeves fixed to the lower end of the strip plate, each of the sleeves is slidably connected to a sliding rod, the other end of each sliding rod is fixed to the sliding plate, and a first spring is sleeved on the side wall of each sleeve, and the two ends of the first spring are respectively connected to the sliding plate and the strip plate.

[0010] Preferably, the driving assembly includes two first fixed plates fixed at the lower end of the base, and the two first fixed plates are rotatably connected to a double-headed screw, the threads at both ends of the double-headed screw are arranged in opposite directions, the two connecting plates are respectively engaged with the two ends of the double-headed screw, and a first motor for driving the double-headed screw is installed on the first fixed plate.

[0011] Preferably, the guide assembly includes two second fixing plates fixed to the lower end of the base, a guide rod is fixed between the two second fixing plates, and the connecting plate is slidably connected to the guide rod.

[0012] Preferably, the pushing assembly includes a U-shaped frame arranged on one side of the strip plate, the U-shaped frame and the strip plate are connected by an extrusion assembly, a second rotating shaft is rotatably connected to the U-shaped frame, a first rotating roller is fixed to the second rotating shaft, the first rotating roller is arranged to be against the outside of the rotating drum body under the extrusion and push of the extrusion assembly, and a third rotating assembly for rotating the second rotating shaft is arranged between the U-shaped frame and the strip plate.

[0013] Preferably, the extrusion assembly includes a rectangular plate fixed on one side of the strip plate, a plurality of T-shaped rods are slidably connected to the rectangular plate, one end of each of the T-shaped rods is fixed to the U-shaped frame, and a second spring is sleeved on the side wall of each of the T-shaped rods.

[0014] Preferably, the third rotating assembly includes a first gear fixed to one end of the second rotating shaft, a first L-shaped plate is fixed to the strip plate, a first rack is fixed to one side of the first L-shaped plate, and the first gear and the first rack are meshed with each other.

[0015] Preferably, the second rotating assembly includes a second gear fixed to one end of the first rotating shaft, a second rack is slidably connected to the first mounting frame, and a second L-shaped plate is fixed between the second rack and the U-shaped frame.

[0016] Preferably, the first rotating assembly includes two second mounting frames fixed to the upper end of the base, a third rotating shaft is rotatably connected between the two second mounting frames, a second rotating roller for clamping the rear rotating drum body for rotation is fixed on the third rotating shaft, the second rotating roller is arranged to abut against the lower end of the rotating drum body, and a second motor for driving the third rotating shaft is installed on the second mounting frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) In the process of driving the double-headed screw to rotate, the automatic welding device for the circumferential weld of the rotating cylinder can drive the two positioning and clamping assemblies to respectively center the two rotating cylinder bodies after placement through transmission, and keep the two center-clamped bodies on the same horizontal plane without the need for repeated lifting and lowering adjustments. This improves the circumferential welding efficiency between the two rotating cylinder bodies and improves the quality of the annular welding of the two rotating cylinder bodies.

[0019] (2) In the automatic welding device for the circumferential weld of a rotating cylinder, when the U-shaped frame is subjected to force and moves toward the rectangular plate, the second rotating component causes the two rotating cylinder bodies, whose one ends are abutted against each other, to rotate in different directions. During the rotation of the two rotating cylinder bodies in different directions, the opposite ends of the two rotating cylinder bodies rub against each other, and the circumferential welding parts of the two rotating cylinder bodies are frictionally cleaned to remove protrusions and debris on the welding end surfaces of the two rotating cylinder bodies, thereby further improving the quality of the circumferential welding of the two rotating cylinder bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the driving assembly and the guide assembly of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the first rotating assembly of the present invention;

[0023] Figure 4 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 5 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 6 for Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0026] Figure 7 for Figure 3 Schematic diagram of the enlarged structure at D in the middle;

[0027] Figure 8 for Figure 4 Schematic diagram of the enlarged structure at E in the middle.

[0028] In the figure: 1, base; 2, ball bearing; 3, rotating drum body; 4, positioning clamping assembly; 401, strip plate; 402, first mounting frame; 403, first rotating shaft; 404, positioning roller; 5, sliding assembly; 501, sliding groove; 502, sliding plate; 503, connecting plate; 6, connecting assembly; 601, sleeve; 602, sliding rod; 603, first spring; 7, driving assembly; 701, first fixing plate; 702, double-headed screw rod; 703, first motor; 8, guiding assembly; 801, second fixing plate; 802, guiding rod; 9, pushing assembly; 90 1. U-shaped frame; 902. second rotating shaft; 903. first rotating roller; 10. extrusion assembly; 1001. rectangular plate; 1002. T-shaped rod; 1003. second spring; 11. third rotating assembly; 1101. first gear; 1102. first L-shaped plate; 1103. first rack; 12. second rotating assembly; 1201. second gear; 1202. second L-shaped plate; 1203. second rack; 13. first rotating assembly; 1301. second mounting frame; 1302. third rotating shaft; 1303. second rotating roller; 1304. second motor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-8 The present invention provides a technical solution: a rotating cylinder annular weld automatic welding device, comprising a base 1 and a plurality of balls 2 arranged above the base 1 for sliding a rotating cylinder body 3, two groups of positioning and clamping components 4 respectively used for positioning and clamping two rotating cylinders are arranged on the base 1, and a first rotating component 13 used for clamping and rotating the two rotating cylinder bodies 3 is arranged on the base 1;

[0031] The positioning clamping assembly 4 includes two symmetrically arranged strip plates 401, two first mounting frames 402 are arranged on opposite sides of the two strip plates 401, a first rotating shaft 403 is rotatably connected to the first mounting frame 402, a positioning roller 404 is fixed to the first rotating shaft 403, the rotating drum body 3 is located between the positioning rollers 404 of the two opposite strip plates 401, and the two strip plates 401 located on the same side of the two positioning clamping assemblies 4 are provided with a pushing assembly 9 for pushing the rotating drum body 3 closer to each other during the welding process and the two rotating drum bodies 3 are welded. A second rotating component 12 is frictionally rotated after one end abuts against each other, and a sliding component 5 is provided on the base 1 for sliding two relative strip plates 401. In the process of driving the double-headed screw 702 to rotate, the two positioning and clamping components 4 can respectively center the two placed rotating cylinder bodies 3 through transmission, and the two center-clamped components can be kept on the same horizontal plane, and repeated lifting and lowering adjustments are no longer needed, which improves the circumferential welding efficiency between the two rotating cylinder bodies 3 and improves the quality of the annular welding of the two rotating cylinder bodies 3.

[0032] The sliding assembly 5 includes a sliding groove 501 opened on the base 1, and a sliding plate 502 is slidably connected to the sliding groove 501. The sliding plate 502 is connected to the strip plate 401 through a connecting assembly 6. A connecting plate 503 is fixed between the two sliding plates 502 located on the same side. The lower end of the base 1 is provided with a driving assembly 7 for relative driving of the two connecting plates 503 and a guiding assembly 8 for guiding during the driving process. The movement of the strip plate 401 is guided by the sliding action of the sliding groove 501 and the sliding plate 502 and the connecting action of the connecting assembly 6.

[0033] The connecting assembly 6 includes a plurality of sleeves 601 fixed at the lower end of the strip plate 401, each sleeve 601 is slidably connected with a slide rod 602, the other end of each slide rod 602 is fixed to the sliding plate 502, and a first spring 603 is sleeved on the side wall of each sleeve 601, and the two ends of the first spring 603 are respectively connected to the sliding plate 502 and the strip plate 401. Through the sleeve 601 and the slide rod 602, the strip plate 401 is subjected to force to move up and down autonomously during the positioning and clamping process, and the first spring 603 facilitates the resetting of the strip plate 401.

[0034] The driving assembly 7 includes two first fixed plates 701 fixed to the lower end of the base 1, and the two first fixed plates 701 are rotatably connected with a double-headed screw 702. The threads at both ends of the double-headed screw 702 are arranged in opposite directions, and the two connecting plates 503 are respectively arranged to mesh with the two ends of the double-headed screw 702. A first motor 703 for driving the double-headed screw 702 is installed on the first fixed plate 701. The first motor 703 is started and the double-headed screw 702 is driven to rotate by the first motor 703. Because the threads at both ends of the double-headed screw 702 are arranged in opposite directions, during the rotation of the double-headed screw 702, the two connecting plates 503 below the drive base 1 are forced to move closer to or away from each other through the mutual meshing transmission between the double-headed screw 702 and the two connecting plates 503 and the guiding effect of the guide assembly 8.

[0035] The guide assembly 8 includes two second fixed plates 801 fixed at the lower end of the base 1, a guide rod 802 is fixed between the two second fixed plates 801, and the connecting plate 503 is slidably connected to the guide rod 802. The connecting plate 503 is guided by the guide rod 802 on the two second fixed plates 801 after being subjected to force.

[0036] The pushing assembly 9 includes a U-shaped frame 901 disposed on one side of the strip plate 401, the U-shaped frame 901 and the strip plate 401 are connected by an extrusion assembly 10, a second rotating shaft 902 is rotatably connected to the U-shaped frame 901, a first rotating roller 903 is fixed to the second rotating shaft 902, the first rotating roller 903 is set against the outside of the rotating drum body 3 under the extrusion and pushing of the extrusion assembly 10, a third rotating assembly 11 for rotating the second rotating shaft 902 is arranged between the U-shaped frame 901 and the strip plate 401, and a third rotating assembly 11 for rotating the second rotating shaft 902 is arranged between the U-shaped frame 901 and the strip plate 401, and a third rotating assembly 11 for rotating the second rotating shaft 902 is arranged between the U-shaped frame 901 and the strip plate 401. During the process of the two strip plates 401 on the rotating drum body 3 moving respectively toward the two sides of the rotating drum body 3, the first rotating rollers 903 on the U-shaped frame 901 on the two strip plates 401 respectively abut against the two sides of the rotating drum body 3, and during the abutting process, through the interaction between the first rotating rollers 903 and the rotating drum body 3, each T-shaped rod 1002 is forced to slide on the rectangular plate 1001 and drive the second spring 1003 to deform and generate elastic force, and the U-shaped frame 901 is pushed through the elastic force of each second spring 1003.

[0037] The extrusion assembly 10 includes a rectangular plate 1001 fixed on one side of the strip plate 401, and a plurality of T-shaped rods 1002 are slidably connected to the rectangular plate 1001, one end of each T-shaped rod 1002 is fixed to the U-shaped frame 901, and a second spring 1003 is sleeved on the side wall of each T-shaped rod 1002. In the process that the two strip plates 401 on the positioning and clamping assembly 4 move toward the two sides of the rotating drum body 3 respectively, the first rotating rollers 903 on the U-shaped frames 901 on the two strip plates 401 respectively abut against the two sides of the rotating drum body 3, and in the process of abutting, through the interaction between the first rotating rollers 903 and the rotating drum body 3, each T-shaped rod 1002 is forced to slide on the rectangular plate 1001 and drive the second spring 1003 to deform and generate elastic force, and through the elastic force of each second spring 1003, the first rotating rollers 903 on the two U-shaped frames 901 are pushed to tightly abut against the rotating drum body 3.

[0038] The third rotating assembly 11 includes a first gear 1101 fixed to one end of the second rotating shaft 902, a first L-shaped plate 1102 is fixed on the strip plate 401, and a first rack 1103 is fixed to one side of the first L-shaped plate 1102. The first gear 1101 and the first rack 1103 are meshed with each other. In the process of the rotating drum body 3 and the first rotating roller 903 abutting against each other to make the U-shaped frame 901 move toward the rectangular plate 1001, the second rotating shaft 902 and the first rotating roller 903 are driven to rotate through the mutual meshing transmission between the first gear 1101 and the first rack 1103. At this time, the first rotating roller 903 abuts against the rotating drum body 3 under the elastic force of the second spring 1003. The rotation of the first rotating roller 903 pushes the two centrally positioned and clamped rotating drum bodies 3 to be forced to move closer to each other. The two rotating drum bodies 3 are forced to move closer, which facilitates the circumferential welding operation of the two rotating drum bodies 3.

[0039] The second rotating assembly 12 includes a second gear 1201 fixed to one end of the first rotating shaft 403, a second rack 1203 is slidably connected to the first mounting frame 402, a second L-shaped plate 1202 is fixed between the second rack 1203 and the U-shaped frame 901, and during the movement of the U-shaped frame 901 against the rectangular plate 1001, the second L-shaped plate 1202 is driven to move synchronously through the U-shaped frame 901. During the movement of the second L-shaped plate 1202, the first rotating shaft 403 on the first mounting frame 402 and the positioning roller 404 on the first rotating shaft 403 are driven to rotate through the interaction between the second gear 1201 and the second rack 1203, so that each positioning roller 404 is fixed to the first rotating shaft 403. The positioning roller 404 is used to position and clamp the rotating drum body 3 against each other. The rotation of the positioning roller 404 drives the rotating drum body 3 to rotate under force. Since the two positioning and clamping components 4 are symmetrically arranged, when the two rotating drum bodies 3 are driven to rotate through transmission, the two rotating drum bodies 3 with one end pressed against each other are rotated in different directions. In the process of the two rotating drum bodies 3 rotating in different directions, the opposite ends of the two rotating drum bodies 3 rub against each other, and the circumferential welding parts of the two rotating drum bodies 3 are frictionally cleaned to remove protrusions and debris on the welding end faces of the two rotating drum bodies 3, thereby further improving the quality of the circumferential welding of the two rotating drum bodies 3.

[0040] The first rotating assembly 13 includes two second mounting frames 1301 fixed on the upper end of the base 1, and a third rotating shaft 1302 is rotatably connected between the two second mounting frames 1301. A second rotating roller 1303 for clamping the rear rotating drum body 3 for rotation is fixed on the third rotating shaft 1302, and the second rotating roller 1303 is set to abut against the lower end of the rotating drum body 3. A second motor 1304 for driving the third rotating shaft 1302 is installed on the second mounting frame 1301. After the two rotating drum bodies 3 are positioned and clamped, the second motor 1304 is started to drive the second rotating roller 1303 on the second mounting frame 1301 to rotate. Through the rotation of the second rotating roller 1303, the two rotating drum bodies 3 after abutting each other rotate synchronously. Through the synchronous rotation of the two rotating drum bodies 3, the circumferential welding operation of the two rotating drum bodies 3 is convenient.

[0041] Working principle: in the process of performing circumferential welding operation on two rotating drum bodies 3 by means of welding device, the two rotating drum bodies 3 to be welded are placed on the base 1. After the placement is completed, the two rotating drum bodies 3 are pushed separately. In the process of the rotating drum bodies 3 being pushed, the two pushed rotating drum bodies 3 are moved to between the two positioning clamping components 4 respectively through the sliding action of each ball 2 on the base 1. After the two rotating drum bodies 3 are pushed on the base 1, the first motor 703 is started. Through the first motor 703, the double-headed screw rod 702 is driven to rotate. Because the threads at both ends of the double-headed screw rod 702 are arranged in opposite directions, in the process of the double-headed screw rod 702 rotating, the two connecting plates 503 below the driving base 1 are forced to move closer to each other through the mutual meshing transmission between the double-headed screw rod 702 and the two connecting plates 503. In the process of the two connecting plates 503 moving closer to each other, the two relative sliding plates 502 are driven to be subjected to force The two strip plates 401 on the positioning and clamping assembly 4 are forced to move toward each other synchronously through the connection between each sleeve 601 and the slide rod 602. The two strip plates 401 on the positioning and clamping assembly 4 move toward each other. The two positioning rollers 404 on the strip plates 401 on both sides of the rotating drum body 3 squeeze the rotating drum body 3, so that the placed rotating drum body 3 is positioned and clamped between the four positioning rollers 404. Therefore, in the process of driving the double-headed screw 702 to rotate, the two positioning and clamping assemblies 4 can respectively center the two placed rotating drum bodies 3 through transmission, and keep the two center-clamped rotating drum bodies 3 on the same horizontal plane, so that repeated lifting and lowering adjustments are no longer needed, thereby improving the circumferential welding efficiency between the two rotating drum bodies 3 and improving the quality of the annular welding of the two rotating drum bodies 3.

[0042] In the process that the two strip plates 401 on the positioning clamping assembly 4 move toward the two sides of the rotating drum body 3 respectively, the first rotating rollers 903 on the U-shaped frames 901 on the two strip plates 401 respectively abut against the two sides of the rotating drum body 3, and in the abutting process, through the interaction between the first rotating rollers 903 and the rotating drum body 3, each T-shaped rod 1002 is forced to slide on the rectangular plate 1001 and drive the second spring 1003 to deform and generate elastic force, and through the elastic force of each second spring 1003, the first rotating rollers 903 on the two U-shaped frames 901 are pushed to tightly abut against the rotating drum body 3, and In the process that the rotating drum body 3 and the first rotating roller 903 are against each other to make the U-shaped frame 901 move toward the rectangular plate 1001, the second rotating shaft 902 and the first rotating roller 903 are driven to rotate through the mutual meshing transmission between the first gear 1101 and the first rack 1103. At this time, the first rotating roller 903 is against the rotating drum body 3 under the elastic force of the second spring 1003. The first rotating roller 903 is driven to rotate and push the two centrally positioned and clamped rotating drum bodies 3 to be forced to move closer to each other. The two rotating drum bodies 3 are forced to move closer to each other, so that the two rotating drum bodies 3 are conveniently welded in an annular direction.

[0043] In the process of the U-shaped frame 901 being forced to move toward the rectangular plate 1001, the second L-shaped plate 1202 is driven to move synchronously through the U-shaped frame 901. In the process of the second L-shaped plate 1202 moving, the first rotating shaft 403 on the first mounting frame 402 and the positioning roller 404 on the first rotating shaft 403 are driven to rotate through the interaction between the second gear 1201 and the second rack 1203. At this time, each positioning roller 404 abuts against the rotating drum body 3 to position and clamp it. Through the rotation of the positioning roller 404, the rotating drum body 3 is driven to be forced to move. The two positioning and clamping components 4 are symmetrically arranged, and when the two rotating drum bodies 3 are driven to rotate by transmission, the two rotating drum bodies 3 with one end abutting against each other are rotated in different directions. In the process of the two rotating drum bodies 3 rotating in different directions, the opposite ends of the two rotating drum bodies 3 rub against each other, and the circumferential welding parts of the two rotating drum bodies 3 are friction-cleaned, and the protrusions and debris on the welding end faces of the two rotating drum bodies 3 are removed, thereby further improving the quality of the circumferential welding of the two rotating drum bodies 3.

Claims

1. A rotary drum annular weld automatic welding device, comprising a base (1) and a plurality of balls (2) arranged above the base (1) for sliding a rotary drum body (3), characterized in that: The base (1) is provided with two groups of positioning and clamping components (4) respectively used for positioning and clamping the two rotating cylinder bodies, and the base (1) is provided with a first rotating component (13) used for clamping and rotating the two rotating cylinder bodies (3); The positioning clamping assembly (4) comprises two symmetrically arranged strip plates (401), two first mounting frames (402) are arranged on opposite sides of the two strip plates (401), a first rotating shaft (403) is rotatably connected to the first mounting frame (402), a positioning roller (404) is fixed to the first rotating shaft (403), the rotating drum body (3) is located between the positioning rollers (404) of the two opposite strip plates (401), two strip plates (401) located on the same side of the two positioning clamping assemblies (4) are provided with a pushing assembly (9) for pushing the rotating drum body (3) closer to each other during welding, and a second rotating assembly (12) for frictionally rotating the two rotating drum bodies (3) after the welded ends are abutted against each other, and a sliding assembly (5) for sliding the two opposite strip plates (401) is provided on the base (1); The sliding assembly (5) comprises a sliding groove (501) formed on the base (1); a sliding plate (502) is slidably connected to the sliding groove (501); the sliding plate (502) is connected to the strip plate (401) via a connecting assembly (6); a connecting plate (503) is fixed between two sliding plates (502) located on the same side; a driving assembly (7) for relative driving of the two connecting plates (503) and a guiding assembly (8) for guiding during the driving process are provided at the lower end of the base (1); The connecting assembly (6) comprises a plurality of sleeves (601) fixed at the lower end of the strip plate (401), each of the sleeves (601) being slidably connected to a sliding rod (602), the other end of each of the sliding rods (602) being fixed to the sliding plate (502), and a first spring (603) being sleeved on the side wall of each of the sleeves (601), the two ends of the first spring (603) being respectively connected to the sliding plate (502) and the strip plate (401); The driving assembly (7) comprises two first fixing plates (701) fixed at the lower end of the base (1), the two first fixing plates (701) being rotatably connected to a double-headed screw (702), the threads at both ends of the double-headed screw (702) being arranged in opposite directions, the two connecting plates (503) being respectively arranged to mesh with the two ends of the double-headed screw (702), and a first motor (703) for driving the double-headed screw (702) being installed on the first fixing plates (701); The guide assembly (8) comprises two second fixing plates (801) fixed to the lower end of the base (1), a guide rod (802) is fixed between the two second fixing plates (801), and the connecting plate (503) is slidably connected to the guide rod (802); The pushing assembly (9) comprises a U-shaped frame (901) arranged on one side of the strip plate (401); the U-shaped frame (901) is connected to the strip plate (401) via an extrusion assembly (10); a second rotating shaft (902) is rotatably connected to the U-shaped frame (901); a first rotating roller (903) is fixed to the second rotating shaft (902); the first rotating roller (903) is arranged to abut against the outside of the rotary drum body (3) under the extrusion and pushing of the extrusion assembly (10); and a third rotating assembly (11) for rotating the second rotating shaft (902) is arranged between the U-shaped frame (901) and the strip plate (401); The extrusion assembly (10) comprises a rectangular plate (1001) fixed to one side of the strip plate (401), a plurality of T-shaped rods (1002) being slidably connected to the rectangular plate (1001), one end of each of the T-shaped rods (1002) being fixed to the U-shaped frame (901), and a second spring (1003) being sleeved on the side wall of each of the T-shaped rods (1002); The third rotating assembly (11) comprises a first gear (1101) fixed to one end of the second rotating shaft (902); a first L-shaped plate (1102) is fixed to the strip plate (401); a first rack (1103) is fixed to one side of the first L-shaped plate (1102); and the first gear (1101) and the first rack (1103) are meshed with each other; The second rotating assembly (12) comprises a second gear (1201) fixed to one end of the first rotating shaft (403); a second rack (1203) is slidably connected to the first mounting frame (402); and a second L-shaped plate (1202) is fixed between the second rack (1203) and the U-shaped frame (901).

2. The automatic welding device for the circumferential weld of a rotary cylinder according to claim 1 is characterized in that: The first rotating assembly (13) comprises two second mounting frames (1301) fixed at the upper end of the base (1); a third rotating shaft (1302) is rotatably connected between the two second mounting frames (1301); a second rotating roller (1303) for clamping the rear rotating drum body (3) for rotation is fixed on the third rotating shaft (1302); the second rotating roller (1303) is arranged to abut against the lower end of the rotating drum body (3); and a second motor (1304) for driving the third rotating shaft (1302) is installed on the second mounting frame (1301).

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