A laser welding device for large thin-walled cylinders

Abstract

The present invention relates to the technical field of welding processing, and specifically to a laser welding device for large thin-walled cylinders, comprising a base, wherein two sliding seats are slidably provided on the base, wherein a first rotating frame is rotatably provided on one of the sliding seats, and a second rotating frame is rotatably provided on the other sliding seat, the second rotating frame has the same structure as the first rotating frame, an inner ring groove and an outer ring groove are coaxially provided on the first rotating frame, and a plurality of supporting members are provided in the inner ring groove and the outer ring groove, the supporting members comprising a sliding block and a supporting roller, the sliding block can slide along the inner ring groove and the outer ring groove, and the supporting roller can slide radially along the first rotating frame relative to the sliding block, so that the supporting roller braces the inner wall of the cylinder, and a supplementing mechanism is also provided on the first rotating frame, the supplementing mechanism can drive the supporting member of the inner ring groove to slide toward the outer ring groove, so that the number of supporting members in the outer ring groove increases with the increase of the diameter of the cylinder, thereby ensuring the shape of the cylinder and improving the welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of welding processing, in particular to a laser welding device for a large thin-walled cylinder. Background Art

[0002] The wall thickness of large thin-walled cylinders is relatively thin, usually about 0.2mm to 6mm. This type of cylinder is easily deformed by its own gravity, making the cylinder elliptical, which makes it impossible to fully align the two cylinders during butt welding, resulting in poor welding quality.

[0003] Patent document CN216912753U discloses a rounding device for butt welding of large thin-walled cylinders, which includes a plurality of extendable and retractable fan-shaped panels, and the cylinder is supported by the fan-shaped panels. However, when this support structure supports a cylinder larger than the radius of the fan-shaped panels, since the arc length of the fan-shaped panels is fixed, there will be a large distance between two adjacent fan-shaped panels, and the fan-shaped panels cannot support the cylinder into a circle. The cylinder will still have a certain degree of deformation, which makes it impossible to align the welding end faces of the cylinder, resulting in poor welding quality. Summary of the invention

[0004] Based on this, it is necessary to provide a laser welding device for large thin-walled cylinders to address the technical problems of the current cylinder support structure affecting the welding quality.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A laser welding device for a large thin-walled cylinder comprises a base, wherein two sliding seats are slidably provided on the base, and the two sliding seats can approach or move away from each other in the front-to-back direction, wherein a first rotating frame is rotatably provided on one of the sliding seats, and a second rotating frame is rotatably provided on the other sliding seat, wherein the first rotating frame and the second rotating frame are respectively used to support a cylinder, and the first rotating frame and the second rotating frame are close to each other so that the two cylinders can be butted together, wherein a welding assembly is further provided on the base, and the welding assembly is used to weld the two butted cylinders, and the second rotating frame has the same structure as the first rotating frame, and the first rotating frame is an annular frame, and the axis of the first rotating frame extends in the front-to-back direction, The first rotating frame is provided with an inner ring groove and an outer ring groove coaxial with the first rotating frame, the inner ring groove is communicated with the outer ring groove, and a plurality of support members are provided in the inner ring groove and the outer ring groove, and the support members include a slider and a support roller, and the support roller extends in the front-rear direction, and the slider can slide along the inner ring groove and the outer ring groove, and the support roller can slide relative to the slider along the radial direction of the first rotating frame, so that the support roller supports the inner wall of the cylinder body, and the first rotating frame and the second rotating frame are both provided with a supplementary mechanism, and the supplementary mechanism can drive the support members of the inner ring groove to slide toward the outer ring groove, so that the number of support members in the outer ring groove increases with the increase of the diameter of the cylinder body, and is evenly distributed around the inner wall of the cylinder body.

[0007] Furthermore, the first rotating frame and the second rotating frame are symmetrically arranged front to back, and the second rotating frame is rotated by a set angle relative to the first rotating frame, and the multiple support members in the outer ring groove are distributed around the circumference of the first rotating frame, and the set angle makes the support member on the second rotating frame correspond to the middle position between two adjacent support members on the first rotating frame.

[0008] Furthermore, a slide groove is provided inside the slider, and the slide groove includes an oblique groove extending in the front-to-back direction and gradually away from the axis of the first rotating frame and a vertical groove extending in the radial direction of the first rotating frame. A support plate is provided at the bottom of the support roller, and a protrusion is provided on the support plate. The protrusion can slide along the slide groove, and a first magnet is provided at the bottom of the support plate. A permanent magnet ring is provided on the inner side wall of the outer ring groove, and the permanent magnet ring repels the first magnet.

[0009] Furthermore, a second magnet is provided on the side of the slider, and the second magnet attracts two adjacent sliders to each other. The support roller is provided with a conical head extending in the front-to-back direction, and the conical head can be inserted between two contacting support rollers to separate them.

[0010] Furthermore, the slider is provided with a double sliding rod, the inner ring groove and the outer ring groove are both double-layer rings, the double sliding rod can slide along the inner ring groove and the outer ring groove, the inner ring groove is connected with the outer ring groove through a connecting groove, and the connecting groove extends along the radial direction of the first rotating frame.

[0011] Furthermore, the supplementary mechanism includes a circumferential pusher and a radial pusher, the circumferential pusher is used to drive the support member of the inner ring groove to the connecting groove, and the radial pusher is used to push the support member in the connecting groove from one end close to the inner ring groove to one end close to the outer ring groove.

[0012] Furthermore, the circumferential pushing member includes an air pipe and a telescopic tube, both of which are arc-shaped. The telescopic tube can slide along the air pipe, and the circle where the air pipe and the telescopic tube are located is concentric with the circle where the inner annular groove is located. The end of the telescopic tube away from the air pipe can push the support member to slide along the inner annular groove.

[0013] Furthermore, a rotating rod is fixed at the center of the first rotating frame and the second rotating frame, and the rotating rod is rotatably set on the corresponding sliding seat. The radial pushing member is an electromagnet set on the outer surface of the rotating rod, and a third magnet is set at the bottom of the sliding block, and the electromagnet repels the third magnet.

[0014] Furthermore, a motor is fixedly provided on one of the sliding seats, and the motor is used to drive the first rotating frame or the second rotating frame to rotate.

[0015] Furthermore, a screw is provided on the base, and two sliding seats are rotatably arranged on the screw.

[0016] The beneficial effects of the present invention are:

[0017] The laser welding equipment for large thin-walled cylinders provided by the present invention has a support roller that slides relative to a slider along the radial direction of a first rotating frame, thereby being able to adapt to cylinders of different sizes. At the same time, a supplementary mechanism can enable the support member to slide from an inner ring groove to an outer ring groove, and the supplementary mechanism enables the number of support members in the outer ring groove to increase as the diameter of the cylinder increases. In this way, when the diameter of the cylinder increases, the number of support points can be increased, the uniformity of support for the cylinder is improved, the shape of the cylinder is guaranteed, and the welding quality is improved.

[0018] Secondly, the support members on the first rotating frame and the support members on the second rotating frame can be clamped with each other. Compared with the rotation of the transmission gear, they can not only form stable support for the cylinder, but also form stable engagement, thereby ensuring the transmission accuracy of the first rotating frame and the second rotating frame, avoiding misalignment of the two docked cylinders, and thus ensuring the welding quality of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention;

[0020] Figure 2 A side view of a laser welding device for a large thin-walled cylinder provided by one embodiment of the present invention;

[0021] Figure 3 for Figure 2 Middle AA section view;

[0022] Figure 4 A partial structural schematic diagram of a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention;

[0023] Figure 5 A schematic structural diagram of a second rotating frame in a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention;

[0024] Figure 6 A partial structural schematic diagram of a first rotating frame in a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention;

[0025] Figure 7 A schematic structural diagram of a support member in a laser welding device for a large thin-walled cylinder provided by an embodiment of the present invention;

[0026] Figure 8 A cross-sectional view of a support member in a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention (without showing the protrusion);

[0027] Fig. 9 A side view of a second rotating frame in a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention;

[0028] Fig.10 A side view of a first rotating frame in a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention;

[0029] Fig.11 A partial structural side view of a first rotating frame in a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention;

[0030] Fig.12 A side view of a support member in a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention;

[0031] Fig.13 A cross-sectional view of a first rotating frame in a laser welding device for a large thin-walled cylinder provided in one embodiment of the present invention.

[0032] in:

[0033] 100, base; 101, lead screw; 102, welding assembly; 200, sliding seat; 300, motor; 400, cylinder; 500, first rotating frame; 501, inner ring groove; 5011, connecting groove; 5012, annular groove; 502, permanent magnet ring; 503, air pipe; 504, air cylinder; 505, partition; 506, telescopic tube; 507, mounting groove; 508, electromagnet; 510, second rotating frame; 509, outer ring groove; 600, support member; 610, slider; 6101, second magnet; 6102, third magnet; 611, double slide bar; 6111, protrusion; 612, slide groove; 613, wedge block; 620, support roller; 621, support plate; 6211, first magnet; 622, protrusion; 623, conical head. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] like Figures 1 to 13As shown, a laser welding device for a large thin-walled cylinder provided by an embodiment of the present invention comprises a base 100, on which two sliding seats 200 are slidably provided, and the two sliding seats 200 can approach or move away from each other in the front-to-back direction, a first rotating frame 500 is rotatably provided on one of the sliding seats 200, and a second rotating frame 510 is rotatably provided on the other sliding seat 200, the first rotating frame 500 and the second rotating frame 510 are respectively used to support a cylinder 400, and the first rotating frame 500 and the second rotating frame 510 are close to each other so that the two cylinders 400 can be butted together, and a welding assembly 102 is also provided on the base 100, and the welding assembly 102 is used to weld the two butted cylinders 400, and the second rotating frame 510 has the same structure as the first rotating frame 500, and the first rotating frame 500 is an annular frame, and the axis of the first rotating frame 500 extends in the front-to-back direction. The rotating frame 500 is provided with an inner ring groove 501 and an outer ring groove 509 coaxial with the first rotating frame 500, the inner ring groove 501 is connected with the outer ring groove 509, and a plurality of supporting members 600 are provided in the inner ring groove 501 and the outer ring groove 509, and the supporting members 600 include a slider 610 and a supporting roller 620, and the supporting roller 620 extends in the front-rear direction, and the slider 610 can slide along the inner ring groove 501 and the outer ring groove 509, and the supporting roller 620 extends in the front-rear direction. 20 can slide relative to the slider 610 along the radial direction of the first rotating frame 500, so that the support roller 620 can hold the inner wall of the cylinder 400 tightly. The first rotating frame 500 and the second rotating frame 510 are both provided with a supplementary mechanism, which can drive the support member 600 of the inner ring groove 501 to slide toward the outer ring groove 509, so that the number of the support members 600 in the outer ring groove 509 increases with the increase of the diameter of the cylinder 400, and is evenly distributed around the inner wall of the cylinder 400. In the initial state, at least three support members 600 are provided in the outer ring groove 509. The welding assembly 102 is a laser welding head in the prior art.

[0038] In one embodiment, the first rotating frame 500 and the second rotating frame 510 are arranged symmetrically front and back, and the second rotating frame 510 rotates at a set angle relative to the first rotating frame 500, and the plurality of support members 600 in the outer ring groove 509 are distributed around the circumference of the first rotating frame 500, and the set angle makes the support member 600 on the second rotating frame 510 correspond to the middle position between two adjacent support members 600 on the first rotating frame 500. A partition plate 505 is fixedly provided at one end of the outer ring groove 509 away from the connecting groove 5011, and the partition plate 505 is used to prevent the support member 600 from being separated from the outer ring groove 509.

[0039] In one embodiment, a slide groove 612 is provided inside the slider 610. The slide groove 612 is two parallel grooves. The slide groove 612 includes an oblique groove extending in the front-back direction and gradually away from the axis of the first rotating frame 500 and a vertical groove extending in the radial direction of the first rotating frame 500. A support plate 621 is provided at the bottom of the support roller 620. The support plate 621 is provided with two protrusions 622 arranged in parallel. The protrusions 622 can slide along the slide groove 612. A first magnet 6211 is provided at the bottom of the support plate 621. A permanent magnet ring 502 is provided on the inner side wall of the outer ring groove 509. The permanent magnet ring 502 repels the first magnet 6211. The permanent magnet ring 502 can push the support plate 621 to slide along the slide groove 612, so that the support roller 620 gradually moves in the direction away from the axis of the first rotating frame 500, so as to achieve the tightening of cylinders 400 of different sizes.

[0040] In one embodiment, a second magnet 6101 is provided on the side of the slider 610, and the second magnet 6101 attracts two adjacent sliders 610 to each other. The support roller 620 is provided with a conical head 623 extending in the front-to-back direction, and the conical head 623 can be inserted between two contacting support rollers 620 to separate them. The slider 610 is provided with a wedge block 613, and the conical head 623 and the wedge block 613 are slidably matched to reduce friction.

[0041] In one embodiment, the slider 610 is provided with a double slide bar 611, the inner ring groove 501 and the outer ring groove 509 are both double-layer rings, and the double slide bar 611 can slide along the inner ring groove 501 and the outer ring groove 509, and the inner ring groove 501 is connected with the outer ring groove 509 through a connecting groove 5011, and the connecting groove 5011 extends along the radial direction of the first rotating frame 500. An anti-falling structure can be provided on the double slide bar 611. Specifically, a protrusion 6111 extending along the radial direction of the first rotating frame 500 can be provided on the double slide bar 611, and an annular groove 5012 is provided on the side walls of the inner ring groove 501 and the outer ring groove 509, and the protrusion 6111 slides along the annular groove 5012, thereby preventing the double slide bar 611 from being separated from the inner ring groove 501 and the outer ring groove 509.

[0042] In one embodiment, the supplementary mechanism includes a circumferential pushing member and a radial pushing member, wherein the circumferential pushing member is used to drive the support member 600 of the inner ring groove 501 to the connecting groove 5011, and the radial pushing member is used to push the support member 600 in the connecting groove 5011 from one end close to the inner ring groove 501 to one end close to the outer ring groove 509.

[0043] In one embodiment, the circumferential pusher includes an air pipe 503 and a telescopic tube 506, both of which are arc-shaped, and the telescopic tube 506 can slide along the air pipe 503. The circle where the air pipe 503 and the telescopic tube 506 are located is concentric with the circle where the inner annular groove 501 is located, and the end of the telescopic tube 506 away from the air pipe 503 can push the support member 600 to slide along the inner annular groove 501. The air pipe 503 is connected to an air cylinder 504, and air can be injected into the air pipe 503 by the air cylinder 504 to realize the sliding of the telescopic tube 506 along the air pipe 503. The air cylinder 504 can be connected to an air pump.

[0044] In one embodiment, a rotating rod is fixed at the center of the first rotating frame 500 and the second rotating frame 510, and the rotating rod is rotatably arranged on the sliding seat 200. The radial pusher is an electromagnet 508 arranged on the outer surface of the rotating rod, and a third magnet 6102 is arranged at the bottom of the sliding block 610, and the electromagnet 508 repels the third magnet 6102. The outer surface of the rotating rod is provided with a mounting groove 507, and the mounting groove 507 is arranged corresponding to the connecting groove 5011, and the electromagnet 508 is arranged in the mounting groove 507.

[0045] In one embodiment, a motor 300 is fixedly disposed on one of the sliding seats 200, and the motor 300 is used to drive the first rotating frame 500 or the second rotating frame 510 to rotate. In this embodiment, the motor 300 drives the first rotating frame 500 to rotate, and the output shaft of the motor 300 is in transmission connection with the rotating rod of the first rotating frame 500.

[0046] In one embodiment, a screw 101 is disposed on the base 100 , two sliding seats 200 are rotatably disposed on the screw 101 , and a rotating mechanism is disposed at one end of the screw 101 .

[0047] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows:

[0048] The two sliding seats 200 are moved away from each other by rotating the lead screw 101, so that the first rotating frame 500 and the second rotating frame 510 on the two sliding seats 200 are moved away from each other, and the support members 600 on the outer ring grooves 509 of the first rotating frame 500 and the second rotating frame 510 are pressed to radially shrink, and then one cylinder 400 is sleeved on the first rotating frame 500, and the other cylinder 400 is sleeved on the second rotating frame 510, and the support member 600 in the outer ring groove 509 on the first rotating frame 500, and its support roller 620 extends out under the magnetic force of the permanent magnet ring 502, so that it can be pressed against the inner wall of the cylinder 400, and the support member 600 in the outer ring groove 509 on the second rotating frame 510, and its support roller 620 can also be pressed against the inner wall of the other cylinder 400 under the action of the magnetic force.

[0049] Then the lead screw 101 is controlled to drive the two sliding seats 200 to approach each other, so that the first rotating frame 500 and the second rotating frame 510 are approached to each other, so that the two cylinders 400 are docked. Since the conical head 623 of the support roller 620 on the first rotating frame 500 corresponds to the middle position between the two support rollers 620 on the second rotating frame 510, the conical head 623 of the support roller 620 on the second rotating frame 510 corresponds to the middle position between the two support rollers 620 on the first rotating frame 500. In the initial state, the support members 600 on the first rotating frame 500 and the support members 600 on the second rotating frame 510 are attracted to each other through the slider 610, so that the two adjacent support members 600 are in contact. When the first rotating frame 500 and the second rotating frame 510 are approaching each other, the conical head 623 of the support roller 620 on the first rotating frame 500 separates two adjacent support members 600 on the second rotating frame 510, and the conical head 623 of the support roller 620 on the second rotating frame 510 separates two adjacent support members 600 on the first rotating frame 500, so that the support members 600 on the second rotating frame 510 and the support members 600 on the first rotating frame 500 are alternately distributed around the circumference of the first rotating frame 500, thereby realizing the snap-fitting of the first rotating frame 500 and the second rotating frame 510.

[0050] Then, the air cylinders 504 on the first rotating frame 500 and the second rotating frame 510 are used to inflate the respective air pipes 503, so that the telescopic tube 506 slides along the air pipe 503, and the telescopic tube 506 drives the support member 600 on the inner ring groove 501 to slide to a position close to the connecting groove 5011. Then, the electromagnets 508 on the first rotating frame 500 and the second rotating frame 510 are alternately controlled to repel the third magnets 6102 at the bottom of the slider 610 of the support member 600, so that the support member 600 on the first rotating frame 500 and the support member 600 on the second rotating frame 510 alternately enter the end of the outer ring groove 509 along their corresponding connecting grooves 5011. The supporting member 600 that enters the outer ring groove 509 later will push the supporting member 600 that enters the outer ring groove 509 earlier to slide along the outer ring groove 509, so that the supporting members 600 on the first rotating frame 500 and the supporting members 600 on the second rotating frame 510 are alternately distributed and pressed against each other until the supporting member 600 in the inner ring groove 501 cannot enter the outer ring groove 509. At this time, the supporting member 600 in the inner ring groove 501 can provide supporting force for the supporting member 600 in the outer ring groove 509. In this way, the number of supporting members 600 in the outer ring groove 509 increases as the diameter of the cylinder 400 increases. In this way, when the diameter of the cylinder 400 is large, the number of supporting points can be increased, the shape of the cylinder 400 is guaranteed, and the uniformity of supporting the cylinder 400 is improved. In this way, the supporting member 600 on the first rotating frame 500 and the supporting member 600 on the second rotating frame 510 can be clamped with each other, and compared with the traditional gear rotation, it can form a stable support and a stable meshing effect, thereby ensuring the transmission accuracy of the first rotating frame 500 and the second rotating frame 510. At this time, it is only necessary to control the motor 300 to drive the first rotating frame 500 to rotate, and then the second rotating frame 510 can be driven to rotate synchronously, so that the two butted cylinders 400 will not be misaligned, and finally the two butted cylinders 400 are welded for one circle by the welding assembly 102 to ensure the welding quality.

[0051] When the motor 300 rotates, Fig.10 As shown, the first rotating frame 500 can be rotated counterclockwise, so that the plurality of supporting members 600 on the first rotating frame 500 and the second rotating frame 510 can be more tightly connected.

[0052] After welding is completed, it is only necessary to alternately control the electromagnet 508 on the first rotating frame 500 and the second rotating frame 510 so that the electromagnet 508 attracts the support member 600 in the connecting groove 5011, so that the support member 600 in the connecting groove 5011 can slide to the inner ring groove 501, and the air pipe 503 is evacuated through the air cylinder 504 to make the support member 600 of the inner ring groove 501 slide to the end away from the connecting groove 5011, so that the support member 600 of the outer ring groove 509 can continue to enter the connecting groove 5011 until the number of support members 600 in the outer ring groove 509 is reduced to the point where the first rotating frame 500 and the second rotating frame 510 are no longer stuck, and then the support roller 620 of the support member 600 is pressed to shrink it, so that the welded cylinder 400 can be removed from the first rotating frame 500 and the second rotating frame 510.

[0053] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A laser welding device for large thin-walled cylinders, characterized in that: The cam is a unit of arrangement comprising two sliding seats, each of which is capable of moving toward or away from the other sliding seat, wherein a first rotating frame is rotatably provided on one of the sliding seats, and a second rotating frame is rotatably provided on the other sliding seat, wherein the first rotating frame and the second rotating frame are respectively used to support a cylinder body, and the first rotating frame and the second rotating frame are capable of moving toward or away from the other sliding seat, wherein the first rotating frame and the second rotating frame are respectively used to support a cylinder body, and the first rotating frame and the second rotating frame are capable of moving toward or away from the other sliding seat, wherein the first rotating frame and the second rotating frame are respectively used to support a cylinder body, and the first rotating frame and the second rotating frame are capable of moving toward or away from the other sliding seat, wherein the first rotating frame and the second rotating frame are respectively used to support a cylinder body, and the first rotating frame and the second rotating frame are capable of moving toward or away from the other cylinder body, wherein the first rotating frame and the second rotating frame are respectively used to support a cylinder body, and the first rotating frame and the second rotating frame are capable of moving toward or away from the other cylinder body, wherein the first rotating frame and the second rotating frame are respectively used to support , a plurality of support members are provided in the inner ring groove and the outer ring groove, and the support members include a slider and a support roller, and the support roller extends in the front-rear direction, and the slider can slide along the inner ring groove and the outer ring groove, and the support roller can slide relative to the slider along the radial direction of the first rotating frame, so that the support roller supports the inner wall of the cylinder body, and the first rotating frame and the second rotating frame are both provided with a supplementary mechanism, and the supplementary mechanism can drive the support members of the inner ring groove to slide toward the outer ring groove, so that the number of support members in the outer ring groove increases with the increase of the diameter of the cylinder body, and is evenly distributed around the inner wall of the cylinder body, the first rotating frame and the second rotating frame are symmetrically arranged front and back, and the second rotating frame rotates a set angle relative to the first rotating frame, and the plurality of support members in the outer ring groove are distributed around the circumferential direction of the first rotating frame The cam is configured to move the first and second support members relative to each other, and the cam is configured to move the first and second support members relative to each other, wherein the cam is configured to move the first and second support members relative to each other, and the cam is configured to move the first and second support members relative to each other. The two supporting rollers in contact with each other and separate them, the slider is provided with a double sliding bar, the inner ring groove and the outer ring groove are both double-layer rings, the double sliding bar can slide along the inner ring groove and the outer ring groove, the inner ring groove is connected with the outer ring groove through a connecting groove, and the connecting groove extends along the radial direction of the first rotating frame, the supplementary mechanism includes a circumferential pushing member and a radial pushing member, the circumferential pushing member is used to drive the supporting member of the inner ring groove to the connecting groove, and the radial pushing member is used to push the supporting member in the connecting groove from one end close to the inner ring groove to one end close to the outer ring groove, the circumferential pushing member includes an air pipe and a telescopic tube, the air pipe and the telescopic tube are both arc-shaped, the telescopic tube can slide along the air pipe, the circle where the air pipe and the telescopic tube are located is concentric with the circle where the inner ring groove is located,The end of the telescopic tube away from the air pipe can push the support member to slide along the inner ring groove, and the centers of the first rotating frame and the second rotating frame are fixed with a rotating rod, and the rotating rod is rotatably set on the corresponding sliding seat, and the radial pushing member is an electromagnet set on the outer surface of the rotating rod, and a third magnet is provided at the bottom of the sliding block, and the electromagnet repels the third magnet. A lead screw is provided on the base, and the two sliding seats are rotatably set on the lead screw. The two sliding seats are moved away from each other by rotating the lead screw, so that the first rotating frame and the second rotating frame on the two sliding seats move away from each other, and the first rotating frame and the second rotating frame on the two sliding seats are pressed by pressing The support member on the outer ring groove of the rotating frame is radially contracted, and then one cylinder is sleeved on the first rotating frame, and the other cylinder is sleeved on the second rotating frame. The support member in the outer ring groove of the first rotating frame, its support roller extends out under the magnetic force of the permanent magnet ring, so that it can be pressed tightly against the inner wall of the cylinder. The support member in the outer ring groove of the second rotating frame, its support roller can also be pressed tightly against the inner wall of the other cylinder under the magnetic force. Then the lead screw is controlled to drive the two sliding seats to approach each other, so that the first rotating frame and the second rotating frame are close to each other, so that the two cylinders are docked; on the first rotating frame and the second rotating frame, When the racks are close to each other, the conical head of the supporting roller on the first rotating rack separates the two adjacent supporting members on the second rotating rack, and the conical head of the supporting roller on the second rotating rack separates the two adjacent supporting members on the first rotating rack, so that the supporting members on the second rotating rack and the supporting members on the first rotating rack are alternately distributed around the circumference of the first rotating rack, thereby realizing the snap-fitting of the first rotating rack and the second rotating rack; then, the air cylinders on the first rotating rack and the second rotating rack are used to inflate the respective air pipes, so that the telescopic tube slides along the air pipe, and the telescopic tube drives the supporting member on the inner ring groove to slide to a position close to the connecting groove, Then, the electromagnets on the first rotating frame and the second rotating frame are alternately controlled to repel each other with the third magnet at the bottom of the slider of the support member, so that the support members on the first rotating frame and the support members on the second rotating frame will alternately enter the end of the outer ring groove along their corresponding connecting grooves, and the support members that enter the outer ring groove later will push the support members that enter the outer ring groove earlier to slide along the outer ring groove, so that the support members on the first rotating frame and the support members on the second rotating frame are alternately distributed and pressed against each other until the support members of the inner ring groove cannot enter the outer ring groove, at which time the support members of the inner ring groove can provide supporting force to the support members of the outer ring groove.

2. The laser welding equipment for large thin-walled cylinders according to claim 1 is characterized in that: A motor is fixedly arranged on one of the sliding seats, and the motor is used to drive the first rotating frame or the second rotating frame to rotate.

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