An annular workpiece welding robot

Abstract

This invention discloses a ring-shaped workpiece welding robot, belonging to the field of welding robot technology. It includes a reinforcing base, a multi-joint robot mounted on the reinforcing base, and a rotatable support assembly. One end of the multi-joint robot is rotatably connected to a welding component. This ring-shaped workpiece welding robot uses a clamping mechanism to position and assemble multiple arc-shaped workpieces into a single weldable assembly. During horizontal welding, the welding component of the multi-joint robot welds the upper and outer seams of the ring-shaped workpiece. Then, a rotation mechanism controls the support assembly to rotate 90°, positioning the ring-shaped workpiece upright on one side of the multi-joint robot. This allows the multi-joint robot to immediately weld the bottom and inner seams of the multiple arc-shaped workpieces after angle adjustment, ensuring that the welding robot can perform comprehensive welding of large-diameter and thick ring-shaped workpieces without needing to change the workpiece's orientation for multi-directional welding.

Description

Technical Field

[0001] This invention relates to the field of welding robot technology, specifically to a welding robot for ring-shaped workpieces. Background Technology

[0002] In the production and processing of large ring-shaped workpieces, it is generally necessary to splice multiple arc-shaped workpieces together and then weld the spliced ​​arc-shaped workpieces together. Since ring-shaped workpieces are widely used in various equipment, such as rails, flanges, and container heads, in order to improve the efficiency of ring-shaped workpiece welding processing, existing technologies often use welding robots to replace manual welding operations.

[0003] According to Chinese patent announcement number CN213224863U, a robotic welding equipment for ring plate workpieces is disclosed. The semi-circular tooling table of the equipment can stably and reliably clamp and position the arc plate to be welded, and then the robot can realize automatic welding. The deformation during the welding process can be controlled within the required range, and no correction is required after welding. Compared with manual welding, the efficiency is significantly improved.

[0004] The above technical solution requires a lifting tool to lift the workpiece from one side and flip it over before welding the other side. This operation requires loosening the clamped workpiece, which necessitates repeated disassembly and repositioning during welding. Furthermore, it requires repositioning the workpiece, making welding extremely troublesome for ring-shaped workpieces with large diameters and thick plates. Summary of the Invention

[0005] The purpose of this invention is to provide a welding robot for ring-shaped workpieces to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a ring-shaped workpiece welding robot, comprising a reinforcing base, a multi-joint robot mounted on the reinforcing base, and a rotatable support assembly, wherein a welding component is rotatably connected to one end of the multi-joint robot.

[0007] A column is fixed to the upper side of the reinforcement base, and a sliding rod is fixed between two adjacent columns. A horizontal frame is symmetrically slidably connected to the sliding rod. A support base welded to the bottom of the reinforcement base is provided on one side of the multi-joint robot. The support assembly includes a rotating shaft movably connected to the top of the support base. A bracket is installed on the outside of the rotating shaft, and a ring-shaped support beam is installed on one side of the bracket. A counterweight for balancing the ring-shaped workpiece and the support assembly is installed at the end of the bracket away from the rotating shaft.

[0008] The supporting beam is provided with a clamping mechanism at an equal angle on the side away from the support seat to drive the rotation of the ring workpiece. The outside of the multi-joint robot is provided with a rotary mechanism to control the lateral movement of the cross frame. The rotary mechanism includes a motor b mounted on the base of the multi-joint robot. The output end of the motor b is connected to a drive gear. The outside of the base of the multi-joint robot is fitted with a lower bevel gear plate and an upper bevel gear plate that are movably connected.

[0009] Preferably, limit pins are provided at both ends of the rotating shaft, and a slide is sleeved on the outer side of the rotating shaft.

[0010] Preferably, the inner wall of the slide cylinder is provided with a spiral-shaped adjusting groove, and the adjusting groove is slidably connected with the limiting pin, and the side of the slide cylinder away from the opening is fixed to one end of the horizontal frame.

[0011] Preferably, a guide slide is provided on the outer edge of the lower conical gear disk, and a support rail that slides with the guide slide is provided on the upper side of the reinforcing seat.

[0012] Preferably, a directional bevel gear is meshed between the lower bevel gear disk and the upper bevel gear disk, the directional bevel gear is movably connected to the limiting seat, and the bottom of the limiting seat is fixed to the reinforcing seat.

[0013] Preferably, a gear ring that meshes with the drive gear is provided at the center of the concave surface of the lower conical disk.

[0014] Preferably, the lower edge of the lower conical gear disk and the upper edge of the upper conical gear disk are symmetrically fixed with levers, and the inner sides of the two sets of cross frames are fixed with staggered pull-down plates and pull-up plates, and the surfaces of the pull-down plates and pull-up plates are provided with strip holes for connecting with the levers.

[0015] Preferably, the clamping mechanism includes an inner cavity formed on the upper surface of the support beam, and a first lead screw is movably connected in the inner cavity. One end of the first lead screw is connected to a motor a installed on the outer wall of the support beam, and an adjusting plate that is threadedly connected to the first lead screw is slidably connected to the surface of the support beam.

[0016] Preferably, a motor a is installed at one end of the adjusting plate, and the output end of the motor a is connected to a drive wheel for limiting the inner wall of the annular workpiece. A second lead screw is movably connected inside the adjusting plate, and one end of the second lead screw is connected to a motor b installed with the adjusting plate.

[0017] Preferably, the outer side of the second lead screw is threaded with a movable pin, and a square tube is detachably installed on the upper end of the movable pin. The two ends of the square tube are telescopically connected with brackets, and a guide wheel assembly for limiting the outer wall of the annular workpiece is rotatably connected to one side of the bracket.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This ring-shaped workpiece welding robot uses a clamping mechanism to position and splice multiple arc-shaped workpieces into a whole to be welded. During horizontal welding, the welding components of the multi-joint robot are used to weld the upper and outer splice seams of the ring-shaped workpiece. Then, the rotation mechanism controls the support component to rotate 90°, so that the ring-shaped workpiece stands on one side of the multi-joint robot. This allows the multi-joint robot to immediately weld the bottom and inner splice seams of the multiple arc-shaped workpieces after adjusting the angle. This ensures that the welding robot can perform comprehensive welding on large-diameter and thick ring-shaped workpieces, and achieve multi-directional welding without changing the workpiece orientation.

[0020] 2. When the supporting component is in a vertical position and all the joints are welded, the robot drives all the drive wheels to separate from the inner ring of the ring workpiece. Then, it drives the guide wheel components in non-bottom positions to separate from the outer ring of the ring workpiece. At this time, the lifting equipment is used to pull the lifting device to hook the ring workpiece, which can remove the welded ring workpiece from multiple clamping mechanisms and transport it. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a welding robot with its support components placed vertically according to the present invention;

[0022] Figure 2 This is a schematic diagram of the first three-dimensional structure of the welding robot with the support component placed horizontally according to the present invention;

[0023] Figure 3 This is a schematic diagram of the second three-dimensional structure of the welding robot with the support component placed horizontally according to the present invention;

[0024] Figure 4 This is a schematic diagram of the first three-dimensional structure of the linkage between the support component and the rotary mechanism of the present invention;

[0025] Figure 5 This is a schematic diagram of the second three-dimensional structure of the linkage between the support component and the rotation mechanism of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the clamping mechanism of the present invention releasing the annular workpiece;

[0027] Figure 7 This is a three-dimensional exploded cross-sectional view of the rotating shaft and sliding cylinder of the present invention;

[0028] Figure 8 This is a first three-dimensional exploded structural diagram of the rotary mechanism of the present invention;

[0029] Figure 9 This is a schematic diagram of the second three-dimensional exploded structure of the rotary mechanism of the present invention;

[0030] Figure 10 This is a three-dimensional exploded view of the clamping mechanism of the present invention.

[0031] In the diagram: 1. Reinforcing base; 101. Slide rod; 102. Horizontal frame; 2. Multi-joint robot; 3. Support base; 4. Support assembly; 401. Rotation axis; 402. Support base; 403. Support beam; 404. Limit pin; 405. Slide cylinder; 406. Orientation groove; 5. Clamping mechanism; 501. Lead screw; 502. Motor a; 503. Adjusting plate; 504. Motor a; 505. Drive wheel; 50 6. No. 2 lead screw; 507. Motor b; 508. Moving pin; 509. Square tube; 510. Bracket; 511. Guide wheel assembly; 6. Rotary mechanism; 601. Motor b; 602. Drive gear; 603. Lower bevel gear plate; 604. Gear ring; 605. Upper bevel gear plate; 606. Lever; 607. Directional bevel gear; 608. Limit seat; 609. Lower pull plate; 610. Upper pull plate; 7. Counterweight. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-6 The present invention provides a technical solution: a ring workpiece welding robot, including a reinforcing base 1, a multi-joint robot 2 mounted on the reinforcing base 1, and a rotatable support component 4, wherein one end of the multi-joint robot 2 is rotatably connected to a welding component.

[0034] A column is fixed to the upper side of the reinforcement base 1, and a slide bar 101 is fixed between two adjacent columns. A cross frame 102 is symmetrically slidably connected to the slide bar 101. A support base 3 is provided on one side of the multi-joint robot 2 and welded to the bottom of the reinforcement base 1. The support assembly 4 includes a rotating shaft 401 movably connected to the top of the support base 3. A bracket 402 is installed on the outside of the rotating shaft 401, and a ring-shaped support beam 403 is installed on one side of the bracket 402. A counterweight 7 for balancing the ring-shaped workpiece and the support assembly 4 is installed at the end of the bracket 402 away from the rotating shaft 401.

[0035] When welding a ring-shaped workpiece horizontally, the ring-shaped support beam 403 is placed horizontally on two sets of horizontal frames 102, so that the horizontal frames 102 can support the support beam 403 and the clamping mechanism 5 for clamping the workpiece. At the same time, the multi-joint robot 2 can drive the welding component to adjust the angle through multi-joint drive, thereby realizing the welding of the upper splice seam and the outer splice seam of adjacent arc-shaped workpieces. At this time, the welding component is driven to weld the upper splice seam and the outer splice seam of multiple arc-shaped workpieces by rotating the multi-joint robot 2 in a circular motion.

[0036] Please see Figures 1-6 and Figure 10 A clamping mechanism 5 for driving the annular workpiece to rotate is provided at an included angle on the side of the support beam 403 away from the support base 402. The clamping mechanism 5 includes an inner cavity opened on the upper surface of the support beam 403, and a first lead screw 501 is movably connected in the inner cavity. One end of the first lead screw 501 is connected to a motor a502 installed on the outer wall of the support beam 403. An adjusting plate 503 that is threadedly connected to the first lead screw 501 is slidably connected to the surface of the support beam 403.

[0037] After the two guide wheel assemblies 511 and the drive wheel 505 clamp and restrict a single arc-shaped workpiece, the robot uses the motor a502 to drive the first lead screw 501 to rotate forward. The forward thread transmission between the first lead screw 501 and the adjusting plate 503 will cause the adjusting plate 503 to move the single arc-shaped workpiece towards the center position of the support beam 403, which facilitates the control of multiple clamping mechanisms 5 to splice multiple arc-shaped workpieces into a whole ring-shaped workpiece.

[0038] Please see Figures 1-6 and Figure 10 A motor a504 is installed at one end of the adjusting plate 503. The output end of the motor a504 is connected to a drive wheel 505 for limiting the inner wall of the annular workpiece. A second lead screw 506 is movably connected inside the adjusting plate 503. A motor b507 installed with the adjusting plate 503 is connected at one end of the second lead screw 506.

[0039] The outer side of the No. 2 lead screw 506 is threaded with a movable pin 508. A square tube 509 is detachably installed on the upper end of the movable pin 508. The two ends of the square tube 509 are telescopically connected with brackets 510. A guide wheel assembly 511 for limiting the outer wall of the annular workpiece is rotatably connected to one side of the bracket 510. The guide wheel assembly 511 consists of a swing arm that rotates at one end of the bracket 510 and clamping wheels that are symmetrically connected in the swing arm.

[0040] This ring-shaped workpiece welding robot horizontally places multiple arc-shaped workpieces on a clamping mechanism 5 with equal included angles. The motor b507 drives the second lead screw 506 to rotate forward, so that the second lead screw 506 and the moving pin 508 are connected by a forward thread transmission. This allows the moving pin 508 to push the square tube 509 to move forward along the adjusting plate 503. This drives the square tube 509 to drive the supports 510 at both ends and the guide wheel assembly 511 to squeeze and push the workpiece. When the arc-shaped workpiece is clamped and restricted by the two guide wheel assemblies 511 and the drive wheel 505 in the same clamping mechanism 5, the guide wheel assembly 511 can achieve multi-point limiting and floating clamping of the outer wall of the arc-shaped workpiece through the rotation of the swing arm and the support 510, ensuring that the single arc-shaped workpiece is stably clamped and limited.

[0041] This ring-shaped workpiece welding robot connects the square tube 509 and the bracket 510 in a telescopic manner. It can adjust the two guide wheel assemblies 511 of the same clamping mechanism 5 to move closer or further apart, thereby adapting to the size of the ring-shaped workpiece according to the clamping requirements.

[0042] Please see Figures 1-5 , Figure 8 and Figure 9 The multi-joint robot 2 is provided with a rotary mechanism 6 for controlling the lateral movement of the cross frame 102 on its outer side. The rotary mechanism 6 includes a motor b601 mounted on the base of the multi-joint robot 2. The output end of the motor b601 is connected to a drive gear 602. The outer side of the base of the multi-joint robot 2 is fitted with a lower bevel gear 603 and an upper bevel gear 605 that are movably connected. The adjacent side surfaces of the lower bevel gear 603 and the upper bevel gear 605 are provided with annular flanges, and the two sets of annular flanges are concentrically distributed. Steel balls are embedded at equal angles between the two sets of annular flanges.

[0043] When the lower bevel gear disk 603 and the upper bevel gear disk 605 are used in coaxial reverse rotation, by setting steel balls between the two sets of annular flanges, the lower bevel gear disk 603 and the upper bevel gear disk 605 can be combined into a coaxial reverse rotation whole, which can prevent the lower bevel gear disk 603 and the upper bevel gear disk 605 from moving and separating during rotation. At the same time, lubricating oil is injected around the steel balls between the two sets of annular flanges, so that the steel balls can reduce the friction of the lower bevel gear disk 603 and the upper bevel gear disk 605 in coaxial reverse rotation.

[0044] A gear ring 604 that meshes with the drive gear 602 is provided at the center of the concave surface of the lower bevel gear disk 603; a directional bevel gear 607 is meshed between the lower bevel gear disk 603 and the upper bevel gear disk 605, the directional bevel gear 607 is movably connected to the limiting seat 608, and the bottom of the limiting seat 608 is fixed to the reinforcing seat 1.

[0045] After completing the welding of the upper and outer seams of the ring-shaped workpiece, the welding robot starts the motor b601 on the base of the multi-joint robot 2. This causes the motor b601 to drive the drive gear 602 to mesh forward with the tooth ring 604 in the concave part of the lower bevel gear disk 603. When the lower bevel gear disk 603 rotates, it can drive the upper bevel gear disk 605 to rotate synchronously by meshing with the directional bevel gear 607.

[0046] Please see Figure 4 , Figure 5 , Figure 8 and Figure 9 The lower edge of the lower bevel gear 603 and the upper edge of the upper bevel gear 605 are symmetrically fixed with levers 606. The inner sides of the two sets of horizontal frames 102 are fixed with staggered pull-down plates 609 and pull-up plates 610. The surfaces of the pull-down plates 609 and pull-up plates 610 are provided with strip holes that connect to the levers 606.

[0047] When the lower bevel gear disk 603 and the upper bevel gear disk 605 rotate in opposite directions on the same axis, they can drive the two sets of levers 606 on the surface to rotate and move in opposite directions. At this time, the lower bevel gear disk 603 and the upper bevel gear disk 605 can drive the levers 606 to slide along the strip holes of the lower pull plate 609 and the upper pull plate 610. Then, the lower bevel gear disk 603 and the upper bevel gear disk 605 can pull the lower pull plate 609 and the upper pull plate 610 in a synchronous manner to drive the two sets of cross frames 102 to move closer to each other.

[0048] Conversely, when the motor b601 drives the drive gear 602 to mesh in the opposite direction with the tooth ring 604 in the concave part of the lower bevel gear disk 603, the lower bevel gear disk 603 and the upper bevel gear disk 605 can simultaneously push the lower pull plate 609 and the upper pull plate 610 to drive the two sets of horizontal frames 102 away from each other.

[0049] Please see Figure 4 , Figure 5 , Figures 7-9 Both ends of the rotating shaft 401 are provided with limit pins 404, and a slide cylinder 405 is sleeved on the outer side of the rotating shaft 401. A spiral-shaped adjusting groove 406 is opened on the inner wall of the slide cylinder 405, and the adjusting groove 406 slides and engages with the limit pin 404. The side of the slide cylinder 405 away from the opening is fixed to one end of the horizontal frame 102.

[0050] When the two sets of horizontal frames 102 move closer to each other by the lower conical toothed plate 603 and the upper conical toothed plate 605 simultaneously pulling the lower pull plate 609 and the upper pull plate 610, the two sets of horizontal frames 102 will slide horizontally along the slide bar 101. The slide cylinder 405 at one end of the horizontal frame 102 will press the limiting pin 404 at the end of the rotating shaft 401 through the spiral-shaped adjustment groove 406 on the inner wall. When the two slide cylinders 405 move closer to each other, they will drive the rotating shaft 401 and the support 402 to flip from the horizontal state to the vertical state. Since a counterweight 7 for balancing the weight of the ring workpiece and the support component 4 is installed at the end of the support 402 away from the rotating shaft 401, the rotation mechanism 6 can stably drive the support component 4 to achieve a 90° flip.

[0051] When the rotating mechanism 6 controls the support component 4 to achieve vertical flipping, the motor b601 on the base of the multi-joint robot 2 will stop rotating, thus keeping the support component 4 vertically placed. Then, the multi-joint robot 2 drives the welding component to adjust the angle, so that the welding component can weld the bottom splice seam and the inner splice seam of the adjacent arc-shaped workpiece. At this time, the motor a504 controlling the multiple clamping mechanisms 5 drives the drive wheel 505 to rotate, so that the multiple drive wheels 505 drive the ring workpiece to rotate in a circle, which facilitates the welding of the bottom splice seam and the inner splice seam of the multi-segment arc-shaped workpiece.

[0052] Please see Figure 3 and Figure 8 The lower conical toothed disk 603 has a guide slide on its lower outer edge, and the upper side of the reinforcing seat 1 is provided with a support rail that slides with the guide slide. The support rail provides sliding support for the guide slide of the lower conical toothed disk 603, thereby providing stable support for the lower conical toothed disk 603 and preventing the lower conical toothed disk 603 from rotating or shifting.

[0053] When the support assembly 4 is in a vertical position and all joints are welded, the welding robot for the ring-shaped workpiece drives the motors a502 and the first lead screw 501 at all positions of the support beam 403 to rotate. This causes the adjusting plate 503 to drive the motor a504 and the drive wheel 505 to move towards the center of the inner ring of the ring workpiece. At this time, the drive wheel 505 at all positions will separate from the inner ring of the ring workpiece. Then, the robot drives the motor b507 and the second lead screw 506 at the non-bottom positions of the support beam 403 to rotate, causing the square tube 5 to... 09. The bracket 510 and guide wheel assembly 511 can move away from the outer ring of the annular workpiece, so that the guide wheel assembly 511 in the non-bottom position will separate from the outer ring of the annular workpiece. At this time, the lifting equipment is used to pull the lifting device to hook the annular workpiece, so that the welded annular workpiece can be removed from the multiple clamping mechanisms 5 and transported. Then, by controlling the two sets of horizontal frames 102 to move away from each other in the opposite direction, the supporting component 4 can be placed horizontally on the horizontal frame 102 again, which is convenient for the assembly and welding of the next workpiece.

[0054] In summary, the multi-segment arc-shaped workpiece is supported and clamped by the support beam 403 and the clamping mechanism 5. Then, the welding component of the multi-joint robot 2 is used to weld the upper and outer splice seams of the ring-shaped workpiece. Then, the rotation mechanism 6 is used to control the support component 4 to flip from horizontal to vertical. Thus, the multi-joint robot 2 can drive the welding component to weld the bottom and inner splice seams of adjacent arc-shaped workpieces, ensuring that the welding robot can perform comprehensive welding on large-diameter and thick ring-shaped workpieces. The contents not described in detail in this description are prior art known to those skilled in the art.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ring-shaped workpiece welding robot, comprising a reinforcing base (1), a multi-joint robot (2) mounted on the reinforcing base (1), and a rotatable support assembly (4), wherein one end of the multi-joint robot (2) is rotatably connected to a welding component; characterized in that: The upper side of the reinforcing base (1) is fixed with a column, and a slide rod (101) is fixed between two adjacent columns. A cross frame (102) is symmetrically slidably connected on the slide rod (101). A support base (3) is provided on one side of the multi-joint robot (2) and welded to the bottom of the reinforcing base (1). The support assembly (4) includes a rotating shaft (401) movably connected to the top of the support base (3). A bracket (402) is installed on the outside of the rotating shaft (401), and a ring-shaped support beam (403) is installed on one side of the bracket (402). A counterweight (7) for balancing the ring workpiece and the support assembly (4) is installed at the end of the bracket (402) away from the rotating shaft (401). The supporting beam (403) is provided with a clamping mechanism (5) for driving the ring workpiece to rotate at an equal angle on the side away from the support (402). The outside of the multi-joint robot (2) is provided with a rotary mechanism (6) for controlling the transverse movement of the cross frame (102). The rotary mechanism (6) includes a motor b (601) mounted on the base of the multi-joint robot (2). The output end of the motor b (601) is connected to a drive gear (602). The outside of the base of the multi-joint robot (2) is fitted with a lower bevel gear disk (603) and an upper bevel gear disk (605) that are movably connected. Both ends of the rotating shaft (401) are provided with limit pins (404), and a slide cylinder (405) is sleeved on the outside of the rotating shaft (401). The inner wall of the slide cylinder (405) is provided with a spiral-shaped adjustment groove (406), and the adjustment groove (406) is slidably connected with the limiting pin (404). The side of the slide cylinder (405) away from the opening is fixed to one end of the horizontal frame (102). A directional bevel gear (607) meshes between the lower bevel gear disk (603) and the upper bevel gear disk (605). The directional bevel gear (607) is movably connected to the limiting seat (608), and the bottom of the limiting seat (608) is fixed to the reinforcing seat (1). The lower conical disk (603) has a toothed ring (604) at the center of its concave surface that meshes with the drive gear (602). The lower edge of the lower bevel gear disk (603) and the upper edge of the upper bevel gear disk (605) are symmetrically fixed with levers (606). The inner sides of the two sets of horizontal frames (102) are fixed with staggered pull-down plates (609) and pull-up plates (610). The surfaces of the pull-down plates (609) and pull-up plates (610) are provided with strip holes that connect to the levers (606).

2. The ring-shaped workpiece welding robot according to claim 1, characterized in that: The lower conical disc (603) has a guide slide on its outer edge, and the upper side of the reinforcing seat (1) is provided with a support rail that slides with the guide slide.

3. The ring-shaped workpiece welding robot according to claim 1, characterized in that: The clamping mechanism (5) includes an inner cavity formed on the upper surface of the support beam (403), and a lead screw (501) is movably connected in the inner cavity. One end of the lead screw (501) is connected to a motor a (502) installed on the outer wall of the support beam (403). An adjusting plate (503) is slidably connected to the surface of the support beam (403) and threadedly connected to the lead screw (501).

4. The ring-shaped workpiece welding robot according to claim 3, characterized in that: One end of the adjusting plate (503) is equipped with a motor a (504), the output end of the motor a (504) is connected to a drive wheel (505) for limiting the inner wall of the annular workpiece, and a second lead screw (506) is movably connected inside the adjusting plate (503), and one end of the second lead screw (506) is connected to a motor b (507) installed with the adjusting plate (503).

5. A ring-shaped workpiece welding robot according to claim 4, characterized in that: The outer side of the second lead screw (506) is threaded with a movable pin (508), and a square tube (509) is detachably installed on the upper end of the movable pin (508). The two ends of the square tube (509) are telescopically connected with brackets (510), and a guide wheel assembly (511) for limiting the outer wall of the annular workpiece is rotatably connected to one side of the bracket (510).

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