Displacement adjusting mechanism for robot welding
By designing a dual-table repositioning structure and a welding displacement structure, the problems of low efficiency and poor precision of traditional robot welding displacement mechanisms are solved, enabling rapid loading and unloading of workpieces and multi-face welding, thereby improving production efficiency and welding quality.
Patent Information
- Application Number
- CN202511650695.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-12
- Publication Date
- 2025-12-12
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional robotic welding positioning mechanisms suffer from low efficiency at a single workstation, insufficient flexibility in angle adjustment, and poor coordination between workpiece fixation and repositioning, resulting in low production efficiency and low precision, making it difficult to meet the multi-face welding requirements of complex workpieces.
It adopts a dual-table switching structure and a welding displacement structure to achieve human-machine dual-station cooperation. It realizes rapid switching and precise flipping of workpieces through synchronous toothed belt and gear transmission. Combined with the design of fixed blocks and auxiliary plates, it ensures the stable fixation of workpieces during the displacement process.
It enables rapid loading and unloading of workpieces and multi-sided welding, reduces downtime, improves production efficiency and welding accuracy, adapts to workpieces of different shapes and sizes, and enhances the flexibility and quality stability of welding operations.
Smart Images
Figure CN121105091A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of welding equipment technology, and more specifically to a displacement adjustment mechanism for robotic welding. Background Technology
[0002] In robotic welding production scenarios, welding efficiency, workpiece welding accuracy, and the ease of human-machine collaboration directly impact production benefits. Traditional welding positioning mechanisms are mostly single-station designs, requiring workers to wait for welding to complete before loading and unloading workpieces, resulting in long downtime and low production efficiency. Some positioning mechanisms lack sufficient flexibility in angle adjustment, making it difficult to adapt to the multi-faceted welding needs of complex workpieces and prone to welding dead angles. At the same time, poor coordination between workpiece fixing and positioning may affect welding accuracy due to workpiece displacement during positioning, making it difficult to meet the core requirements of "high efficiency, precision, and collaboration" in mass production. The limitations of existing positioning mechanisms are: single-station design leads to human-machine collaboration conflicts and low production efficiency; limited angle adjustment range and insufficient flexibility make them unsuitable for welding complex workpieces; poor coordination between workpiece fixing and positioning makes them prone to displacement, affecting welding accuracy. Therefore, a positioning adjustment mechanism for robot welding is proposed. Summary of the Invention
[0003] To address the problems of low single-station efficiency, insufficient angle adjustment flexibility, and poor coordination between workpiece fixation and displacement in traditional robot welding positioning mechanisms, this invention provides a positioning adjustment mechanism for robot welding.
[0004] To achieve the above objectives, the present invention specifically adopts the following technical solution: A displacement adjustment mechanism for robotic welding includes a robotic arm mounted on a robotic arm mounting platform and a workpiece fixing plate for fixing the workpiece. The displacement adjustment mechanism further includes: The dual-stage repositioning structure is located below the robot arm and the workpiece fixing plate. The welding station facing the robot arm can be changed through the dual-stage repositioning structure, realizing the cooperation between human and machine in dual-stage operation. The welding displacement structure is set on both sides of the workpiece fixing plate and is rotatably connected to the workpiece fixing plate. The welding displacement structure is used to change the angle of the workpiece fixing plate to achieve displacement adjustment during welding.
[0005] Preferably, the dual-workbench transposition structure includes a first base, a first synchronous pulley, a first motor, a synchronous toothed belt, a second base, a second synchronous pulley, and an operating table. The first motor is fixedly mounted on the first base, the first synchronous pulley is fixedly mounted on the output shaft of the first motor, the second synchronous pulley is rotatably mounted on the second base, and the operating table is fixedly mounted above the second synchronous pulley. The synchronous toothed belt is sleeved on both the first and second synchronous pulleys.
[0006] Preferably, the first base is located directly below the robot arm fixing platform, and a support rod is fixedly installed between the first base and the robot arm fixing platform. The two ends of the support rod are fixedly connected to the upper surface of the first base and the lower surface of the robot arm fixing platform, respectively.
[0007] Preferably, the synchronous toothed belt is an interlocking transmission belt, with a rack on the inner ring of the synchronous toothed belt, and toothed grooves that mesh with the rack on the first and second synchronous pulleys.
[0008] Preferably, a partition is fixedly installed on the operating table, and a transparent observation window is provided on the partition. Workpiece fixing plates are respectively installed on both sides of the partition. Two machine boxes are fixedly installed on the operating table located on the same side of the partition, and the two machine boxes are respectively installed on both sides of the workpiece fixing plate.
[0009] Preferably, the welding displacement structure further includes a second motor, a first gear, a rotating shaft, a second gear, a first connecting plate, and a second connecting plate. The first gear is fixedly connected to the output shaft of the second motor, the second gear is fixedly connected to the rotating shaft located on the same side, the second gear is located directly above the first gear and meshes with the first gear, the first connecting plate is fixedly installed at one end of the rotating shaft, and the second connecting plate is fixedly connected to the first connecting plate by screws.
[0010] Preferably, the second motor, the first gear, the shaft, and the second gear are all installed inside the chassis. The second motor is fixedly installed inside the chassis on one side. The end of the shaft away from the first connecting plate is rotatably connected to the inner wall of the chassis. The end of the chassis with the first connecting plate installed passes through the chassis and extends to the outside of the chassis.
[0011] Preferably, a fixing block is fixedly installed on the second connecting plate, and the fixing block is fixedly connected to the workpiece fixing plate by bolts.
[0012] Preferably, the welding displacement structure further includes an auxiliary plate, which is fixedly mounted on the workpiece fixing plate by bolts, and the auxiliary plate has bolt holes for fixing the workpiece.
[0013] The beneficial effects of this invention are as follows: (i) The dual-station switching structure enables rapid switching between two workstations. Workers can simultaneously load and unload workpieces and perform pre-processing at non-welding workstations without waiting for the robot to finish welding. This completely solves the process conflict of "welding-waiting-loading and unloading" at a single workstation, significantly shortens downtime, and improves batch production efficiency.
[0014] (ii) The welding displacement structure drives the workpiece fixing plate to flip through gear transmission. The angle adjustment is precise and controllable. It can be used in conjunction with the movement trajectory of the robot to realize multi-face and multi-angle welding of the workpiece, effectively eliminating welding dead angles. It is suitable for workpieces of different shapes and sizes, without the need to change special fixtures, thus improving the flexibility and adaptability of welding operations.
[0015] (iii) The combination design of the fixed block and the auxiliary plate achieves the stable fixation of the workpiece, and there is no offset or shaking during the displacement process; the high precision characteristics of the synchronous toothed belt and gear transmission ensure the consistency of station switching and angle adjustment, reduce welding errors, and ensure the stability of workpiece welding quality in mass production. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the first base and the first synchronous belt pulley of the present invention; Figure 3 This is a three-dimensional structural diagram of the dual-stage repositioning structure and other structures of the present invention; Figure 4 This is a partial three-dimensional structural schematic diagram of the dual-stage repositioning structure and welding displacement structure of the present invention; Figure 5 This is a three-dimensional structural diagram of the second connecting plate and fixing block of the present invention; Figure 6 This is a schematic diagram of the internal cross-sectional structure of the chassis of the present invention; Figure 7 This is a three-dimensional structural diagram of the first gear and the second gear of the present invention.
[0017] Reference numerals: 1. Robotic arm fixed platform; 2. Double workbench repositioning structure; 3. Welding displacement structure; 4. Robotic arm; 5. Workpiece fixing plate; 200. First base platform; 201. First synchronous pulley; 202. First motor; 203. Support rod; 204. Synchronous toothed belt; 205. Second base platform; 206. Second synchronous pulley; 207. Operating platform; 300. Chassis; 301. Second motor; 302. First gear; 303. Rotating shaft; 304. Second gear; 305. First connecting plate; 306. Second connecting plate; 307. Fixing block; 308. Auxiliary plate; 309. Partition; 310. Transparent observation window. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0020] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0021] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.
[0022] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.
[0023] Example: Refer to Figures 1-7 A displacement adjustment mechanism for robot welding includes a robot arm 4 mounted on a robot arm mounting table 1 and a workpiece fixing plate 5 for fixing the workpiece. The displacement adjustment mechanism also includes: The dual-stage repositioning structure 2 is set below the robot arm 4 and the workpiece fixing plate 5. The welding station facing the robot arm 4 can be changed through the dual-stage repositioning structure 2, so as to realize the cooperation operation of the human and machine in dual stages. The welding displacement structure 3 is set on both sides of the workpiece fixing plate 5 and is rotatably connected to the workpiece fixing plate 5. The welding displacement structure 3 is used to change the angle of the workpiece fixing plate 5 so as to realize the displacement adjustment during welding.
[0024] The dual-workstation switching structure 2 includes a first base 200, a first synchronous pulley 201, a first motor 202, a synchronous toothed belt 204, a second base 205, a second synchronous pulley 206, and an operating table 207. The first motor 202 is fixedly mounted on the first base 200, the first synchronous pulley 201 is fixedly mounted on the output shaft of the first motor 202, the second synchronous pulley 206 is rotatably mounted on the second base 205, and the operating table 207 is fixedly mounted above the second synchronous pulley 206. The synchronous toothed belt 204 is sleeved on both the first synchronous pulley 201 and the second synchronous pulley 206. The first base 200 is located directly below the robot arm fixing table 1. A support rod 203 is fixedly installed between the first base 205 and the robot arm fixing table 1. 03 is fixedly connected at both ends to the upper surface of the first base 200 and the lower surface of the robot arm fixing table 1, respectively. The synchronous toothed belt 204 is a meshing transmission belt, and a rack is provided on the inner ring of the synchronous toothed belt 204. The first synchronous pulley 201 and the second synchronous pulley 206 are provided with toothed grooves that mesh with the rack of the synchronous toothed belt 204. A partition 309 is fixedly installed on the operating table 207. A transparent observation window 310 is provided on the partition 309. The workpiece fixing plates 5 are respectively installed on both sides of the partition 309. Two machine boxes 300 are fixedly installed on the operating table 207 on the same side of the partition 309. The two machine boxes 300 are respectively installed on both sides of the workpiece fixing plate 5. The welding displacement structure 3 also includes a second motor 301, a first gear 302, and a rotating shaft 303. The second gear 304, the first connecting plate 305, and the second connecting plate 306 are all present. The first gear 302 is fixedly connected to the output shaft of the second motor 301. The second gear 304 is fixedly connected to the rotating shaft 303 on the same side. The second gear 304 is located directly above the first gear 302 and meshes with it. The first connecting plate 305 is fixedly installed at one end of the rotating shaft 303. The second connecting plate 306 is fixedly connected to the first connecting plate 305 by screws. The second motor 301, the first gear 302, the rotating shaft 303, and the second gear 304 are all installed inside the housing 300. The second motor 301 is fixedly installed inside the housing 300 on one side. The end of the rotating shaft 303 away from the first connecting plate 305 is flush with the inner wall of the housing 300. The device is dynamically connected. One end of the first connecting plate 305 installed on the chassis 300 passes through the chassis 300 and extends to the outside of the chassis 300. A fixing block 307 is fixedly installed on the second connecting plate 306. The fixing block 307 is fixedly connected to the workpiece fixing plate 5 by bolts. The welding displacement structure 3 also includes an auxiliary plate 308. The auxiliary plate 308 is fixedly installed on the workpiece fixing plate 5 by bolts. The auxiliary plate 308 has bolt holes for fixing the workpiece. The robot arm 4 of this device is set on one side of the operating table 207. The operating table 207 is divided into two operating spaces by 209. The operating spaces on both sides of the partition 309 are equipped with the chassis 300, the second motor 301 and other adjustment devices for connecting the workpiece fixing plate 5 to change its position.
[0025] In use, the worker stands at the station away from the robot arm 4. Workpieces to be welded can be installed and removed at this station, or pre-processed before welding can be performed. Welding operations are performed at the station on the other side of the partition 309 using the robot arm 4. When fixing the workpiece fixing plate 5, both ends of the workpiece fixing plate 5 are secured in the fixing blocks 307 on the second connecting plates 306 on both sides, and then fixed with bolts. The workpiece can be fixed to the workpiece fixing plate 5 with bolts. If the workpiece is too small, the auxiliary plate 308 can be fixed to the workpiece fixing plate 5 first, and then the workpiece can be fixed to the auxiliary plate 308.
[0026] When repositioning is required during welding operations, the second motor 301 can be connected to the main controller. The main controller analyzes and processes the motion trajectory of the robot arm 4, allowing the second motor 301 to cooperate with the robot arm 4 to reposition and flip the workpiece. When the second motor 301 is working, it drives the first gear 302 to rotate through the output shaft. The first gear 302 meshes with the first connecting plate 305, causing the first connecting plate 305 to rotate. The first connecting plate 305 drives the rotating shaft 303 to rotate. When the rotating shaft 303 rotates, it drives the first connecting plate 305 and the second connecting plate 306 to rotate, thereby causing the workpiece fixing plate 5 to flip.
[0027] After the robotic arm 4 completes welding, the worker needs to leave the rotation range of the operating table 207 and perform a repositioning operation via the main controller. During the straight-line repositioning operation, the first motor 202 operates, driving the first synchronous pulley 201 to rotate. The first synchronous pulley 201 drives the second synchronous pulley 206 to rotate via the synchronous toothed belt 204. The rotation of the second synchronous pulley 206 drives the operating table 207 to rotate. By pre-setting motor parameters, the operating table 207 is ultimately rotated 180°, thereby achieving the flipping of the workstations on both sides of the partition 309. At this time, the worker can disassemble and clean the workpiece welded by the robotic arm 4 and install the new workpiece on the workpiece fixing plate 5. Simultaneously, the robotic arm 4 on the other side can perform welding operations. The dual-workstation setup greatly improves the efficiency of human-machine collaboration.
[0028] Working principle: The robot arm 4 of this device is set on one side of the operating table 207. The operating table 207 is divided into two operating spaces by 209. Both operating spaces on both sides of the partition 309 are equipped with a machine box 300, a second motor 301 and other adjustment devices for connecting the workpiece fixing plate 5 to change position.
[0029] In use, the worker stands at the station away from the robot arm 4. Workpieces to be welded can be installed and removed at this station, or pre-processed before welding can be performed. Welding operations are performed at the station on the other side of the partition 309 using the robot arm 4. When fixing the workpiece fixing plate 5, both ends of the workpiece fixing plate 5 are secured in the fixing blocks 307 on the second connecting plates 306 on both sides, and then fixed with bolts. The workpiece can be fixed to the workpiece fixing plate 5 with bolts. If the workpiece is too small, the auxiliary plate 308 can be fixed to the workpiece fixing plate 5 first, and then the workpiece can be fixed to the auxiliary plate 308.
[0030] When repositioning is required during welding operations, the second motor 301 can be connected to the main controller. The main controller analyzes and processes the motion trajectory of the robot arm 4, allowing the second motor 301 to cooperate with the robot arm 4 to reposition and flip the workpiece. When the second motor 301 is working, it drives the first gear 302 to rotate through the output shaft. The first gear 302 meshes with the first connecting plate 305, causing the first connecting plate 305 to rotate. The first connecting plate 305 drives the rotating shaft 303 to rotate. When the rotating shaft 303 rotates, it drives the first connecting plate 305 and the second connecting plate 306 to rotate, thereby causing the workpiece fixing plate 5 to flip.
[0031] After the robotic arm 4 completes welding, the worker needs to leave the rotation range of the operating table 207 and perform a repositioning operation via the main controller. During the straight-line repositioning operation, the first motor 202 operates, driving the first synchronous pulley 201 to rotate. The first synchronous pulley 201 drives the second synchronous pulley 206 to rotate via the synchronous toothed belt 204. The rotation of the second synchronous pulley 206 drives the operating table 207 to rotate. By pre-setting motor parameters, the operating table 207 is ultimately rotated 180°, thereby achieving the flipping of the workstations on both sides of the partition 309. At this time, the worker can disassemble and clean the workpiece welded by the robotic arm 4 and install the new workpiece on the workpiece fixing plate 5. Simultaneously, the robotic arm 4 on the other side can perform welding operations. The dual-workstation setup greatly improves the efficiency of human-machine collaboration.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.
Claims
1. A displacement adjustment mechanism for robot welding, comprising a robot arm (4) mounted on a robot arm mounting table (1) and a workpiece fixing plate (5) for fixing the workpiece, characterized in that: The displacement adjustment mechanism further includes: The dual-station switching structure (2) is set below the robot (4) and the workpiece fixing plate (5). The welding station facing the robot (4) can be changed through the dual-station switching structure (2) to realize the cooperation operation of the human and machine in dual stations. The welding displacement structure (3) is set on both sides of the workpiece fixing plate (5) and the welding displacement structure (3) is rotatably connected to the workpiece fixing plate (5). The welding displacement structure (3) is used to change the angle of the workpiece fixing plate (5) so as to realize the displacement adjustment during welding.
2. The displacement adjustment mechanism for robot welding according to claim 1, characterized in that, The dual-workbench transposition structure (2) includes a first base (200), a first synchronous pulley (201), a first motor (202), a synchronous toothed belt (204), a second base (205), a second synchronous pulley (206), and an operating table (207). The first motor (202) is fixedly installed on the first base (200), the first synchronous pulley (201) is fixedly installed on the output shaft of the first motor (202), the second synchronous pulley (206) is rotatably installed on the second base (205), and the operating table (207) is fixedly installed above the second synchronous pulley (206). The synchronous toothed belt (204) is sleeved on both the first synchronous pulley (201) and the second synchronous pulley (206).
3. The displacement adjustment mechanism for robot welding according to claim 2, characterized in that, The first base (200) is located directly below the robot arm fixing platform (1). A support rod (203) is fixedly installed between the first base (200) and the robot arm fixing platform (1). The two ends of the support rod (203) are fixedly connected to the upper surface of the first base (200) and the lower surface of the robot arm fixing platform (1), respectively.
4. The displacement adjustment mechanism for robot welding according to claim 3, characterized in that, The synchronous toothed belt (204) is a meshing type transmission belt. The inner ring of the synchronous toothed belt (204) is provided with a rack. The first synchronous pulley (201) and the second synchronous pulley (206) are provided with toothed grooves that mesh with the rack of the synchronous toothed belt (204).
5. The displacement adjustment mechanism for robot welding according to claim 4, characterized in that, A partition (309) is fixedly installed on the operating table (207). A transparent observation window (310) is provided on the partition (309). Workpiece fixing plates (5) are respectively installed on both sides of the partition (309). Two machine boxes (300) are fixedly installed on the operating table (207) located on the same side of the partition (309). The two machine boxes (300) are respectively installed on both sides of the workpiece fixing plate (5).
6. The displacement adjustment mechanism for robot welding according to claim 5, characterized in that, The welding displacement structure (3) further includes a second motor (301), a first gear (302), a rotating shaft (303), a second gear (304), a first connecting plate (305), and a second connecting plate (306). The first gear (302) is fixedly connected to the output shaft of the second motor (301), and the second gear (304) is fixedly connected to the rotating shaft (303) located on the same side. The second gear (304) is located directly above the first gear (302) and meshes with the first gear (302). The first connecting plate (305) is fixedly installed at one end of the rotating shaft (303), and the second connecting plate (306) is fixedly connected to the first connecting plate (305) by screws.
7. The displacement adjustment mechanism for robot welding according to claim 6, characterized in that, The second motor (301), the first gear (302), the rotating shaft (303) and the second gear (304) are all installed inside the chassis (300). The second motor (301) is fixedly installed inside the chassis (300) on one side. The end of the rotating shaft (303) away from the first connecting plate (305) is rotatably connected to the inner wall of the chassis (300). The end of the chassis (300) on which the first connecting plate (305) is installed passes through the chassis (300) and extends to the outside of the chassis (300).
8. The displacement adjustment mechanism for robot welding according to claim 7, characterized in that, A fixing block (307) is fixedly installed on the second connecting plate (306), and the fixing block (307) is fixedly connected to the workpiece fixing plate (5) by bolts.
9. The displacement adjustment mechanism for robot welding according to claim 8, characterized in that, The welding displacement structure (3) also includes an auxiliary plate (308), which is fixedly mounted on the workpiece fixing plate (5) by bolts. The auxiliary plate (308) has bolt holes for fixing the workpiece.