High-precision welding equipment for thin-walled structure

Abstract

The present application relates to the field of high-precision welding, and particularly relates to a high-precision welding device for thin-walled structures, comprising a supporting table, a main cylinder, a side cylinder, a three-clamp unit, a double-clamp unit and a welding unit; the three-clamp unit drives the radial synchronous movement of the clamping plate through a threaded disc one, so as to realize the coaxial clamping of the cylindrical workpiece; the double-clamp unit drives the clamping frame and the arc-shaped frame to limit a plurality of thin-walled rings through a threaded disc two, and cooperates with the driving assembly and the clamping block to complete the step-by-step transfer of the rings; the welding unit adjusts the position of the welding gun through horizontal and vertical lead screws, and the swing motor realizes the adjustable welding angle; the device can be adapted to the butt welding of thin-walled ring seams and special-shaped components, solves the problems of single clamping mode, insufficient continuous welding capacity and fixed welding angle of traditional devices, improves the welding precision and efficiency through combined clamping and automatic step-by-step welding, and meets the high-precision welding requirements in high-end manufacturing fields such as aerospace.

Description

Technical Field

[0001] This invention relates to the field of high-precision welding, and in particular to a high-precision welding device for thin-walled structures. Background Technology

[0002] In the fields of aerospace and high-precision rotating machinery, there are two typical precision welding requirements: one is that multiple thin-walled rings need to be spaced around the outer circumference of a cylindrical workpiece, and high-precision circumferential welding needs to be completed; the other is that one side of a cylindrical workpiece needs to be precisely butt-welded to a slender cylindrical shaft or a main shaft or other irregularly shaped component. However, the clamping methods of existing argon arc welding equipment are relatively simple, only suitable for clamping two independent workpieces separately. When butt-welding two cylindrical workpieces, although positioning can be achieved through clamping devices at both ends, for the thin-walled rings that are wrapped around the outer side of the main cylindrical workpiece, the lack of external clamping structures makes it impossible for traditional clamping mechanisms to provide stable and reliable positioning. Even if positioning is possible, it will obstruct the welding area, thus making it impossible to quickly weld multiple outer rings sequentially. As a result, existing technology is unable to meet the high-precision welding requirements of such thin-walled structures.

[0003] In the prior art, patent CN117359057A discloses an automatic argon arc welding device. This device includes a turntable structure for fixing a first weldment and an adsorption mechanism located at the front end of the welding head, which can pick up a second weldment by vacuum adsorption. The second weldment, in sheet form, is picked up by vacuum adsorption and placed at a designated position on the first weldment, where it is then welded by a welding torch, thus achieving automated positioning and connection of the first and second workpieces. However, although this technology improves some of the original problems, there are still aspects that need further optimization to better meet actual welding requirements.

[0004] First, this device can only pick up and position film-shaped or sheet-shaped second workpieces through vacuum adsorption, lacking the ability to clamp ring-shaped, cylindrical, or other solid structure workpieces, thus significantly limiting its applicability. Second, this equipment can only place single film workpieces one by one on the first workpiece for welding, failing to achieve continuous clamping or combined welding of multiple parts to be welded, resulting in low overall welding efficiency. Furthermore, the welding torch in the prior art only moves its position via a sliding table mechanism; its welding angle is not adjustable, making angle optimization impossible based on different weld shapes, workpiece shapes, or welding posture requirements, resulting in poor welding adaptability.

[0005] Therefore, based on the above-stated viewpoints, there is still room for improvement in existing high-precision welding equipment. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a thin-walled high-precision welding device, comprising a support platform, a U-shaped plate mounted on one side of the support platform, a main cylinder mounted between the U-shaped plates, a side cylinder rotatably mounted at one end of the main cylinder, and a three-clamp unit for clamping cylindrical workpieces mounted inside the side cylinder.

[0007] The main cylinder is also equipped with a double clamping unit for holding the ring workpiece.

[0008] A welding unit for welding the ring onto the cylinder is also installed on one side of the support platform.

[0009] Preferably, the three-clamp unit includes a threaded disc rotatably installed inside the side cylinder. Several sliding grooves are provided on one side of the side cylinder, distributed around its axis. A clamping plate is slidably installed in the sliding groove, and one end of the clamping plate is threadedly connected to one end of the threaded disc.

[0010] Preferably, the double-clamp unit includes a threaded disc 2 rotatably installed inside the main cylinder, a sliding frame slidably passing through the outside of the main cylinder, one side of the sliding frame being threadedly connected to one side of the threaded disc 2, and the other end of the sliding frame extending out of the outside of the main cylinder and being fitted with a clamping frame, one end of the clamping frame corresponding to the clamping plate.

[0011] Preferably, an arc-shaped frame is installed on one side of each of the two clamping frames, and a blocking block is installed on one side of the arc-shaped frame.

[0012] A structural block is slidably installed inside the clamping frame. A structural groove is opened inside the structural block, which is connected to the outside of the structural block on one side. A clamping block is slidably installed inside the structural groove. An electric push rod is installed between the clamping block and the structural groove.

[0013] Preferably, a drive assembly for moving the structural block is installed inside the main cylinder. The drive assembly includes a driven plate installed on one side of the structural block, a support plate installed on one side of the clamping frame, a drive screw rotatably installed on the support plate, and one end of the drive screw is threadedly connected to the driven plate.

[0014] Preferably, a support cone is installed on the inner wall of the main cylinder, a driven shaft is rotatably installed on one side of the support cone, a driven gear is fixedly sleeved on the outside of the driven shaft, a transmission shaft is rotatably passed through one side of the sliding frame, and a transmission belt is sleeved between one side of the transmission shaft and the side of the sliding frame and the driven shaft.

[0015] Furthermore, the drive shaft is connected to one end of the drive screw via belt drive.

[0016] Preferably, a drive unit for rotating threaded disc one, threaded disc two and driven gear is installed between the main cylinder and the side cylinder. The drive unit includes a drive motor slidably installed on one side of the main cylinder. A push plate is installed at one end of the drive motor outside the main cylinder. A drive cylinder is installed on one side of the main cylinder. The extension and retraction end of the drive cylinder is connected to the push plate.

[0017] The main shaft of the drive motor is equipped with a drive shaft. One end of the drive shaft is slidably connected to the threaded disc 2 and the inside of the side cylinder, and corresponds to one side of the threaded disc 1.

[0018] Preferably, a hexagonal groove is provided on one side of the threaded disc, and a hexagonal block located in the hexagonal groove is installed at the end of the drive shaft.

[0019] One side of the side cylinder is equipped with an internal gear ring 1 located inside the main cylinder and having a U-shaped cross section, and one side of the threaded disc 2 is provided with an internal gear ring 2 having a U-shaped cross section. The outer side of the drive shaft is fixedly fitted with a drive gear 1 corresponding to the internal gear ring 1 and the internal gear ring 2.

[0020] Preferably, a second drive gear corresponding to the driven gear is also fixedly sleeved on the outer side of the drive shaft.

[0021] Preferably, the welding unit includes a strip frame installed on one side of the support platform, a vertical plate slidably installed inside the strip frame, and a transverse lead screw threadedly connected to the vertical plate rotatably installed inside the strip frame.

[0022] A horizontal plate is slidably installed inside the vertical plate. A vertical lead screw, which is threadedly connected to the horizontal plate, is rotatably installed inside the vertical plate. A swing motor is installed on one side of the horizontal plate. An installation ring is installed on the main shaft of the swing motor. The installation ring is used to install the welding gun.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] I. This invention solves the problem of the single clamping method of existing equipment by combining a three-clamp unit and a double-clamp unit: the three-clamp unit achieves coaxial fixation of cylindrical workpieces through radial synchronous clamping, and the double-clamp unit forms a stable limit for thin-walled rings through the coordinated action of the arc frame and the clamping block. With the addition of a bending plate, it can be adapted to the docking clamping of small cylindrical components, which can meet the needs of two typical precision welding methods and solve the problems of thin-walled rings lacking clamping points and difficulty in docking and positioning of irregularly shaped components.

[0025] Second, the present invention solves the defect of existing equipment that cannot continuously weld multiple parts to be welded by means of the linkage design of the drive component and the double clamping unit: the drive component can drive the structural block to accurately move a single ring to the preset welding position, while the blocking block keeps the other rings in a limited position, so as to realize the sequential step welding of multiple thin-walled rings without repeated clamping and adjustment, reducing the working gap and improving the overall welding efficiency.

[0026] Third, this invention overcomes the shortcomings of existing equipment, such as non-adjustable welding angle and poor adaptability, by using a swing motor and multi-dimensional adjustment mechanism configured in the welding unit: the horizontal and vertical lead screws realize multi-dimensional precise positioning of the welding torch, and the swing motor can flexibly adjust the welding angle, which can adapt to different weld shapes and welding posture requirements such as circumferential seams and butt seams. Combined with automated positioning and rotation welding, it ensures high-precision welding quality. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the structure of the main body of the present invention.

[0029] Figure 2 This is a planar sectional view of the main body of the present invention.

[0030] Figure 3 This is an axial sectional view of the main body of the present invention.

[0031] Figure 4 This is the present invention. Figure 3 Enlarged view of part of the structure at point A in the middle.

[0032] Figure 5 This is a schematic diagram of the structure of the double-clamp unit of the present invention.

[0033] Figure 6 This is the present invention. Figure 5 Enlarged view of part of the structure at point B.

[0034] Figure 7 This is a schematic diagram of the structure of the driving component of the present invention.

[0035] Figure 8 This is a schematic diagram of the welding unit of the present invention.

[0036] Figure 9 This is a schematic diagram of the structure of the bending plate of the present invention.

[0037] Figure 10 This is a schematic diagram showing the completed welding of the cylinder, ring, and second workpiece of the present invention.

[0038] In the diagram, 1. Support platform; 10. U-shaped plate; 11. Main cylinder; 12. Side cylinder; 2. Three-clamp unit; 20. Threaded disc one; 21. Sliding groove; 22. Clamping plate; 3. Double-clamp unit; 30. Threaded disc two; 31. Sliding frame; 32. Clamping frame; 33. Arc frame; 34. Barrier block; 35. Structural block; 36. Structural groove; 37. Clamping block; 38. Electric actuator; 4. Drive assembly; 40. Driven plate; 41. Support plate; 42. Drive screw; 43. Support cone; 44. Driven shaft; 45. Driven gear 46. ​​Wheel; 47. Drive shaft; 48. Drive belt; 49. Telescopic plate; 50. Limiting shaft; 61. Drive unit; 52. Drive motor; 53. Push plate; 54. Drive cylinder; 55. Drive shaft; 66. Hexagonal slot; 57. Hexagonal block; 58. Internal gear ring one; 59. Internal gear ring two; 60. Drive gear one; 61. Drive gear two; 62. Welding unit; 63. Strip frame; 64. Vertical plate; 65. Horizontal lead screw; 66. Horizontal plate; 67. Vertical lead screw; 68. Swing motor; 69. Mounting ring; 70. Bending plate. Detailed Implementation

[0039] The following combination Figures 1 to 10 The embodiments of the present invention will be described in detail below.

[0040] This application discloses a high-precision welding equipment for thin-walled structures, which is used in the circumferential welding of thin-walled ring and cylindrical workpieces in the aerospace field, and the butt welding of small cylindrical components and main cylindrical workpieces. It can realize the automated and precise clamping, positioning and step-by-step welding of workpieces; furthermore, it can also adapt to different weld seam requirements through angle-adjustable welding operations, ensuring welding accuracy and efficiency.

[0041] Example 1: Refer to Figure 1 , Figure 2 , Figure 3 and Figure 10 As shown, it includes a support platform 1, a U-shaped plate 10, a main cylinder 11, a side cylinder 12, a three-clamp unit 2, a double-clamp unit 3, and a welding unit 6. A U-shaped plate 10 is installed on one side of the support platform 1, and a main cylinder 11 is installed between the U-shaped plates 10. A side cylinder 12 is rotatably installed at one end of the main cylinder 11. A three-clamp unit 2 for clamping cylindrical workpieces (hereinafter referred to as cylinders) is installed inside the side cylinder 12.

[0042] The main cylinder 11 is also equipped with a double clamping unit 3 for clamping the annular workpiece (hereinafter referred to as the annular).

[0043] A welding unit 6 for welding the ring onto the cylinder is also installed on one side of the support platform 1.

[0044] First, the cylinder is clamped by the three-clamp unit 2. Then, several rings are placed on the outside of the cylinder. The rings are further limited by the double-clamp unit 3. The rings can be welded to the outside of the cylinder in sequence by the cooperation of the double-clamp unit 3 and the welding unit 6.

[0045] Reference Figures 1 to 2 As shown, the three-clamp unit 2 is used to clamp the cylinder. Specifically, the three-clamp unit 2 includes a threaded disc 20, a sliding groove 21, and a clamping plate 22. The threaded disc 20 is rotatably mounted on the inner wall of the side cylinder 12. Several sliding grooves 21 are provided on one side of the side cylinder 12, which are distributed around its axis. The clamping plate 22 is slidably installed in the sliding groove 21, and one end of the clamping plate 22 is threadedly connected to one end of the threaded disc 20.

[0046] Driven by an external force, the threaded disc 20 can move several clamping plates 22 in the corresponding sliding grooves 21 toward the axis of the side cylinder 12, so that the clamping plates 22 can clamp or release the clamping limit on the outer side of the cylinder.

[0047] Reference Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the double clamping unit 3 is used to clamp the ring. Specifically, the double clamping unit 3 includes a threaded disc 30, a sliding frame 31, a clamping frame 32, an arc-shaped frame 33, a blocking block 34, a structural block 35, a structural groove 36, a clamping block 37, and an electric push rod 38. The threaded disc 30 is rotatably mounted on the inner wall of the main cylinder 11. The sliding frame 31 slides through the outer side of the main cylinder 11. One side of the sliding frame 31 is threadedly connected to one side of the threaded disc 30. The other end of the sliding frame 31 extends out of the outside of the main cylinder 11 and is fitted with a clamping frame 32. One end of the clamping frame 32 corresponds to the clamping plate 22.

[0048] That is, when the threaded disc 30 is driven by an external force to rotate inside the main cylinder 11, it can drive the sliding frames 31 on both sides to reciprocate on the outside of the main cylinder 11, and simultaneously drive the corresponding clamping frame 32 to move synchronously during the movement.

[0049] An arc-shaped frame 33 is installed on one side of each of the two clamping frames 32. A blocking block 34 is installed on one side of the arc-shaped frame 33. When several rings are placed on the outside of the cylinder, the clamping frame 32 drives the arc-shaped frame 33 to clamp the outside of the several rings. The blocking block 34 is used to prevent the several rings from falling off to the outside of the arc-shaped frame 33.

[0050] A structural block 35 is slidably installed inside the clamping frame 32. A structural groove 36 is opened inside the structural block 35, which is connected to the outside of the structural block 36 on one side. A clamping block 37 is slidably installed inside the structural groove 36. An electric push rod 38 is installed between the clamping block 37 and the structural groove 36.

[0051] Under the drive of external force, the structural block 35 can reciprocate along the extension of the clamping frame 32. The electric actuator 38 can drive the clamping block 37 to reciprocate within the structural groove 36. When several rings need to be clamped and moved to the designated position of the cylinder for welding, the structural block 35 moves to correspond to one side of the ring. At this time, the electric actuator 38 pushes the clamping block 37 to move into the arc frame 33 and correspond to the outer side of the designated ring. That is, the clamping blocks 37 on both sides play the role of clamping the outer side of the ring. Then the clamping frame 32 moves a distance away from the ring, and the several rings are no longer limited by the arc frame 33. The blocking block 34 can continue to correspond to one side of other rings and play the role of limiting and blocking the remaining rings.

[0052] At this time, the construction block 35 drives the ring on one side to move along the outside of the cylinder through the clamping plate 22 until it moves to the specified distance and disengages from the corresponding arc frame 33. At this time, the clamping frame 32 can drive the arc frame 33 to clamp and limit the outside of the remaining rings.

[0053] Then, the designated ring and the outer side of the cylinder are welded by the welding unit 6. The side cylinder 12 drives the cylinder to rotate, and the clamping block 37 is driven by the electric push rod 38 to no longer clamp the designated ring. At this time, the cylinder can drive the outer ring to rotate through the weld point formed by the initial welding, so that the welding unit 6 can evenly weld all the gaps between the ring and the cylinder, and weld the designated ring to the outer side of the cylinder. During welding, since the center of the remaining rings limited between the arc frame 33 is rotatedly connected to the outer side of the cylinder, it will not interfere with the rotation of the cylinder.

[0054] Furthermore, if several rings accidentally slide on the outside of the cylinder, or if the distance between the rings becomes loose, the clamping block 37 can be moved out of the construction groove 36 in advance. Then the construction block 35 moves through the clamping block 37 to contact the outermost ring, pushing all the rings together to the other side to avoid occupying too much space.

[0055] Reference Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, a drive assembly 4 for moving the structural block 35 is installed inside the main cylinder 11. Specifically, the drive assembly 4 includes a driven plate 40, a support plate 41, a drive screw 42, a support cone 43, a driven shaft 44, a driven gear 45, a transmission shaft 46, a transmission belt 47, a telescopic plate 48, and a limiting shaft 49. The driven plate 40 is installed on one side of the structural block 35, and the support plate 41 is installed on one side of the clamping frame 32. The drive screw 42 is rotatably mounted on the support plate 41, and one end of the drive screw 42 is threadedly connected to the driven plate 40. That is, when the drive screw 42 is driven by an external force, it can rotate under the limitation of the support plate 41, and drive the structural block 35 to reciprocate within the clamping frame 32 through the driven plate 40.

[0056] A support cone 43 is installed on the inner wall of the main cylinder 11. A driven shaft 44 is rotatably installed on one side of the support cone 43. A driven gear 45 is fixedly sleeved on the outside of the driven shaft 44. A transmission shaft 46 is rotatably passed through one side of the sliding frame 31. A transmission belt 47 is sleeved between the transmission shaft 46 and the driven shaft 44 on one side of the sliding frame 31. The transmission shaft 46 is connected to one end of the drive screw 42 by belt drive.

[0057] Driven by an external force, the driven gear 45 can drive the driven shaft 44 to rotate on the support cone 43. The driven shaft 44 can drive the transmission shaft 46 to rotate on the sliding frame 31 through the transmission belt 47. The transmission shaft 46 can then drive the drive screw 42 on one side to rotate through the belt drive.

[0058] Two telescopic plates 48, corresponding one-to-one with the sliding frame 31, are symmetrically installed on the inner wall of the main cylinder 11. A limiting shaft 49, which abuts against the inner side of the adjacent transmission belt 47, is installed on the telescopic end of the telescopic plate 48.

[0059] Since the threaded disc 30 can drive the sliding frame 31 to move outside the main cylinder 11, the sliding frame 31 can drive the transmission shaft 46 to move with it. At this time, the telescopic end of the telescopic plate 48 can pull the inner side of the corresponding transmission belt 47 through the limiting shaft 49, so that the transmission belt 47 is always in a taut state, and the driven shaft 44 can drive the transmission shaft 46 to rotate through the transmission belt 47.

[0060] Reference Figure 2 , Figure 3 and Figure 4As shown, a drive unit 5 is installed between the main cylinder 11 and the side cylinder 12 to drive the threaded disc 20, the threaded disc 30 and the driven gear 45 to rotate. Specifically, the drive unit 5 includes a drive motor 50, a push plate 51, a drive cylinder 52, a drive shaft 53, a hexagonal slot 54, a hexagonal block 55, an internal gear ring 1 56, an internal gear ring 2 57, a drive gear 1 58 and a drive gear 2 59. The drive motor 50 is slidably installed on one side of the main cylinder 11. The push plate 51 is installed at one end of the drive motor 50 outside the main cylinder 11. The drive cylinder 52 is installed on one side of the main cylinder 11. The telescopic end of the drive cylinder 52 is connected to the push plate 51. The drive cylinder 52 can drive the drive motor 50 to reciprocate on one side of the main cylinder 11 through the push plate 51.

[0061] The main shaft of the drive motor 50 is equipped with a drive shaft 53. One end of the drive shaft 53 is slidably connected to the threaded disc 20 and the side cylinder 12 and corresponds to one side of the threaded disc 20. A hexagonal groove 54 is provided on one side of the threaded disc 20, and a hexagonal block 55 located in the hexagonal groove 54 is installed at the end of the drive shaft 53. The drive cylinder 52 can drive the drive motor 50 and the drive shaft 53 to reciprocate within the main cylinder 11. The drive motor 50 can also drive the hexagonal block 55 to rotate through the drive shaft 53, so that the drive shaft 53 can drive the threaded disc 20 to rotate within the side cylinder 12 through the cooperation of the hexagonal block 55 and the hexagonal groove 54, thereby driving the clamping plate 22 to move.

[0062] An internal gear ring 56 with a U-shaped cross-section is installed on one side of the side cylinder 12, and an internal gear ring 57 with a U-shaped cross-section is provided on one side of the threaded disc 30. A drive gear 58 corresponding to the internal gear ring 56 and the internal gear ring 57 is fixedly sleeved on the outer side of the drive shaft 53.

[0063] When it is necessary to rotate the side cylinder 12 or the threaded disc 30, the drive cylinder 52 drives the drive motor 50 to move on one side of the main cylinder 11, so that the drive shaft 53 drives the outer drive gear 58 to mesh with the inner gear ring 56 or the inner gear ring 57. The drive gear 58 can then drive the side cylinder 12 or the threaded disc 30 to rotate through the inner gear ring 56 or the inner gear ring 57. At this time, the hexagonal block 55 is not inserted in the hexagonal slot 54.

[0064] A second drive gear 59 corresponding to the driven gear 45 is also fixedly sleeved on the outer side of the drive shaft 53. When it is necessary to drive the driven gear 45 to rotate so that the sliding frame 31 can move, the second drive gear 59 on the outer side of the drive shaft 53 can be driven by the drive cylinder 52 to mesh with the outer side of the driven gear 45, so that the drive shaft 53 can drive the driven gear 45 to rotate through the second drive gear 59. At this time, the first drive gear 58 does not mesh with the first internal gear ring 56 and the second internal gear ring 57, and the hexagonal block 55 is not inserted into the corresponding hexagonal slot 54.

[0065] Furthermore, in actual use, when the drive shaft 53 drives the threaded disc 20 to rotate inside the side cylinder 12 through the cooperation of the hexagonal block 55 and the hexagonal slot 54, a spring rod (not shown in the figure) can be embedded inside one end of the main cylinder 11. The extension end of the spring rod abuts against one end of the side cylinder 12, which plays a limiting role in the side cylinder 12, so that the threaded disc 20 will not accidentally drive the side cylinder 12 to rotate synchronously. When it is necessary to drive the side cylinder 12 to rotate, the drive gear 58 meshes with the internal gear ring 56, so that the driving force on the side cylinder 12 is greater than the abutting force of the spring rod, and the side cylinder 12 can rotate. The above-mentioned damping and limiting means of the spring rod for the side cylinder 12 is a conventional technical means in this field, so the implementation process will not be described in detail here.

[0066] In summary, this device can drive the three-clamp unit 2, the double-clamp unit 3, and the drive assembly 4 to work together using only two devices: the drive motor 50 and the drive cylinder 52. This enables precise clamping, positioning, and transfer of cylinders and thin-walled rings, simplifying the overall structural layout and reducing the difficulty of equipment control.

[0067] Reference Figure 1 and Figure 8 As shown, this is the welding unit 6 used to weld the ring onto the cylinder. Specifically, the welding unit 6 includes a strip frame 60, a vertical plate 61, a horizontal lead screw 62, a horizontal plate 63, a vertical lead screw 64, a swing motor 65, and a mounting ring 66. The strip frame 60 is installed on one side of the support platform 1. The vertical plate 61 is slidably installed inside the strip frame 60, and the horizontal lead screw 62, which is threadedly connected to the vertical plate 61, is rotatably installed inside the strip frame 60. The horizontal plate 63 is slidably installed inside the vertical plate 61, and the vertical lead screw 64, which is threadedly connected to the horizontal plate 63, is rotatably installed inside the vertical plate 61. The swing motor 65 is installed on one side of the horizontal plate 63, and the mounting ring 66 is installed on the main shaft of the swing motor 65. The mounting ring 66 is used to install the welding torch.

[0068] One side of the horizontal lead screw 62 and the vertical lead screw 64 can pass through the outer wall of the corresponding strip frame 60 and the vertical plate 61 and connect to the main shaft of the external motor, driving them to rotate. This allows the horizontal lead screw 62 and the vertical lead screw 64 to drive the vertical plate 61 to move laterally within the strip frame 60, and the horizontal plate 63 to move vertically along the extension of the vertical plate 61. During welding, the welding torch is installed in the mounting ring 66. The mounting ring 66 can be moved to the outside of cylinders of different diameters and lengths by the lateral and vertical movement of the corresponding vertical plate 61 and the horizontal plate 63, welding the ring to the outside of the cylinder. During the welding process, the oscillating motor 65 can change the welding angle of the welding torch through the mounting ring 66 to achieve welding at different angles.

[0069] After the ring is moved to the designated position outside the cylinder by the clamping block 37, the welding torch can be lowered to perform preliminary positioning welding on one side of the ring and the cylinder, so that the ring can be initially limited on the cylinder. Then the welding torch is moved to the other side of the ring to perform electric welding, further ensuring that the ring is initially welded to the outside of the cylinder and will not move accidentally. After that, the clamping block 37 no longer clamps the designated ring, so that the cylinder can be rotated by the three-clamp unit 2. The welding torch can evenly weld the gap between the ring and the cylinder. After one side is welded, the other side of the ring is welded again.

[0070] Example 2: Refer to Figure 9 and Figure 10 As shown, based on Embodiment 1, in order to clamp the second cylindrical workpiece with a smaller diameter (hereinafter referred to as the second workpiece), a bending plate 7 is installed at the end of the clamping frame 32.

[0071] First, the cylinder is clamped by the clamping plate 22. Then, one end of the second workpiece is brought into contact with one end of the cylinder. The end of the bending plate 7 is arc-shaped and can be adapted to the outer side of the second workpiece. The clamping frame 32 drives the bending plate 7 to clamp the outer side of the second workpiece. Then, the welding gun is started to weld the second workpiece to one side of the cylinder.

[0072] The welding process still involves first performing preliminary welding between the second workpiece and the cylinder using a welding torch, and then using the bending plate 7 to remove the clamping of the second workpiece, while the welding torch performs uniform welding on the gap between the second workpiece and the cylinder.

[0073] In summary, the preliminary welding in this device is suitable for thin-walled ring structures and small cylindrical components commonly used in the aerospace field. After preliminary welding using this device, the ring and the second workpiece can be initially positioned, and the outer clamping frame 32 and bending plate 7 can be released, so that the welding of the ring and the second workpiece will not be obstructed, thus speeding up the welding efficiency and accuracy.

[0074] During operation: First, the cylinder is placed inside the side cylinder 12. The clamping plate 22 of the three-clamp unit 2 is moved radially by the drive unit 5 to coaxially clamp and position the cylinder.

[0075] In the second step, if welding thin-walled rings, several rings are sequentially placed on the outside of the cylinder. The driving unit 5 drives the arc frame 33 of the double clamping unit 3 to close, and the arc frame 33 and the blocking block 34 limit the overall position of the rings. If welding a second workpiece, one end of the second workpiece is attached to the end face of the cylinder, and the clamping frame 32 drives the bending plate 7 to clamp and position the outside of the second workpiece.

[0076] Third, start the drive component 4 to move the construction block 35 to the designated ring, the electric push rod 38 pushes the clamping block 37 to clamp the ring, then the arc frame 33 is released, the construction block 35 moves the designated ring along the cylinder to the preset welding position; when welding the second workpiece, keep the bent plate 7 in the clamping state until the initial welding is completed.

[0077] The fourth step involves adjusting the welding gun position using the horizontal lead screw 62 and vertical lead screw 64 of the welding unit 6, and adjusting the welding angle using the oscillating motor 65, to perform preliminary positioning welding on both sides of the ring and cylinder or at the joint between the second workpiece and the cylinder.

[0078] Fifth step: After the initial welding is completed, the clamping block 37 or the bending plate 7 releases the clamp on the cylinder or the second workpiece, and the driving unit 5 drives the side cylinder 12 to rotate synchronously with the cylindrical workpiece. The welding gun performs uniform welding on the circumferential seam or the butt joint.

[0079] Step 6: After the welding of a single ring is completed, repeat steps 3 to 5 to complete the welding of the remaining rings in sequence; after all welding is completed, the three-clamp unit 2 and the double-clamp unit 3 are reset and the welded product is taken out.

[0080] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0081] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-precision welding equipment for thin-walled structures, comprising a support platform (1), characterized in that: A U-shaped plate (10) is installed on one side of the support platform (1), a main cylinder (11) is installed between the U-shaped plates (10), a side cylinder (12) is rotatably installed at one side port of the main cylinder (11), and a three-clamp unit (2) for clamping the cylindrical workpiece is installed inside the side cylinder (12). The main cylinder (11) is also equipped with a double clamping unit (3) for clamping the ring workpiece. A welding unit (6) for welding the ring onto the cylinder is also installed on one side of the support platform (1). The three-clamp unit (2) includes a threaded disc (20) rotatably installed in the side cylinder (12). Several sliding grooves (21) are provided on one side of the side cylinder (12) and distributed around its axis. A clamping plate (22) is slidably installed in the sliding groove (21), and one end of the clamping plate (22) is threadedly connected to one end of the threaded disc (20). The double clamping unit (3) includes a threaded disk two (30) rotatably installed inside the main cylinder (11), a sliding frame (31) slidably passing through the outside of the main cylinder (11), one side of the sliding frame (31) being threadedly connected to one side of the threaded disk two (30), and the other end of the sliding frame (31) extending out of the outside of the main cylinder (11) and being fitted with a clamping frame (32), one end of the clamping frame (32) corresponding to the clamping plate (22); An arc frame (33) is installed on one side of the two clamping frames (32), and a blocking block (34) is installed on one side of the arc frame (33). A structural block (35) is slidably installed inside the clamping frame (32). A structural groove (36) with one side communicating with its outer side is opened inside the structural block (35). A clamping block (37) is slidably installed inside the structural groove (36). An electric push rod (38) is installed between the clamping block (37) and the structural groove (36). The main cylinder (11) is equipped with a drive assembly (4) for moving the structural block (35). The drive assembly (4) includes a driven plate (40) installed on one side of the structural block (35), a support plate (41) installed on one side of the clamping frame (32), a drive screw (42) rotatably installed on the support plate (41), and one end of the drive screw (42) is threadedly connected to the driven plate (40).

2. The high-precision welding equipment for thin-walled structures according to claim 1, characterized in that: A support cone (43) is installed on the inner wall of the main cylinder (11). A driven shaft (44) is rotatably installed on one side of the support cone (43). A driven gear (45) is fixedly sleeved on the outside of the driven shaft (44). A transmission shaft (46) is rotatably passed through one side of the sliding frame (31). A transmission belt (47) is sleeved between one side of the transmission shaft (46) and the side of the sliding frame (31) and the driven shaft (44). Furthermore, the drive shaft (46) is connected to one end of the drive screw (42) via belt drive.

3. The high-precision welding equipment for thin-walled structures according to claim 2, characterized in that: A drive unit (5) for rotating threaded disc one (20), threaded disc two (30) and driven gear (45) is installed between the main cylinder (11) and the side cylinder (12). The drive unit (5) includes a drive motor (50) slidably mounted on one side of the main cylinder (11). A push plate (51) is installed at one end of the drive motor (50) outside the main cylinder (11). A drive cylinder (52) is installed on one side of the main cylinder (11). The telescopic end of the drive cylinder (52) is connected to the push plate (51). The main shaft of the drive motor (50) is equipped with a drive shaft (53). One end of the drive shaft (53) is slidably connected to the threaded disc two (30) and the side cylinder (12) and corresponds to one side of the threaded disc one (20).

4. The high-precision welding equipment for thin-walled structures according to claim 3, characterized in that: A hexagonal slot (54) is provided on one side of the threaded disc (20), and a hexagonal block (55) located in the hexagonal slot (54) is installed at the end of the drive shaft (53). A U-shaped internal gear ring 1 (56) is installed on one side of the side cylinder (12) and is located inside the main cylinder (11). A U-shaped internal gear ring 2 (57) is provided on one side of the threaded disc 2 (30). A drive gear 1 (58) corresponding to the internal gear ring 1 (56) and the internal gear ring 2 (57) is fixedly sleeved on the outside of the drive shaft (53).

5. The high-precision welding equipment for thin-walled structures according to claim 3, characterized in that: A second drive gear (59) corresponding to the driven gear (45) is also fixedly sleeved on the outside of the drive shaft (53).

6. The high-precision welding equipment for thin-walled structures according to claim 1, characterized in that: The welding unit (6) includes a strip frame (60) installed on one side of the support platform (1), a vertical plate (61) is slidably installed inside the strip frame (60), and a transverse screw (62) that is threadedly connected to the vertical plate (61) is rotatably installed inside the strip frame (60). A horizontal plate (63) is slidably installed inside the vertical plate (61). A vertical screw (64) that is threadedly connected to the horizontal plate (63) is rotatably installed inside the vertical plate (61). A swing motor (65) is installed on one side of the horizontal plate (63). An installation ring (66) is installed on the main shaft of the swing motor (65). The installation ring (66) is used to install the welding gun.

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