A multi-station welding station

Abstract

The application discloses a kind of multi-station welding workstations, belong to welding tooling technical field, including annular inner rail, welding mechanical arm being installed in the center of annular inner rail, multiple groups of workstations are arranged on annular inner rail along the circumference interval, the spacing between adjacent two workstations is same, the section of annular inner rail is H-shaped, at least one group of workstations is installed with positioning structure;One side of workbench is installed with telescopic arc-shaped rod, the other side is installed with corresponding butt joint structure of telescopic arc-shaped rod;Butt joint structure includes limit ring, triangular cylinder, support rod, arc-shaped support block, elastic tension spring, limit ring is installed in the first arc-shaped groove opened in the inner side of workbench, the through hole for support rod is opened in the side wall of limit ring, the outer end of support rod is fixedly connected to arc-shaped support block.The workstation of the application can reduce the disassembly time of tooling, realize the collinear welding processing of multiple models of products, adapt to the production of multiple categories of small batches, and stably improve overall capacity.

Description

Technical Field

[0001] This invention belongs to the field of welding tooling technology, specifically relating to a multi-station welding workstation. Background Technology

[0002] As the manufacturing industry continues to upgrade towards automation and intelligence, welding, as a key process in metal processing, directly affects the production capacity and product reliability of the entire production line through its operational efficiency and quality stability. Currently, multi-axis articulated welding robotic arms are widely used as the core execution unit in industrial settings. In actual production, after the welding robotic arm completes all the welds on the workpiece on the current worktable, it must immediately stop and wait in place for operators or auxiliary equipment to disassemble the welded workpiece. At the same time, the blank to be welded must be re-clamped and positioned, and the air circuit, electrical circuit, and tooling fixtures must be locked and confirmed. This loading and unloading stage usually takes several minutes or even longer. For flexible production lines with small batches and frequent product changes, the proportion of loading and unloading auxiliary time in the total operation cycle further increases, reducing the production efficiency of the workshop. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a multi-station welding workstation that can reduce the time for tooling assembly and disassembly, realize the co-line welding processing of multiple product models, adapt to the production of multiple categories of small batches, and steadily improve the overall production capacity.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This invention discloses a multi-station welding workstation, comprising an annular inner guide rail and a welding robotic arm mounted at the center of the annular inner guide rail. Multiple sets of worktables are spaced circumferentially along the annular inner guide rail, with equal spacing between adjacent worktables. The annular inner guide rail has an I-shaped cross-section. At least one set of worktables is equipped with a positioning structure. A telescopic arc-shaped rod is mounted on one side of each worktable, and a corresponding docking structure is mounted on the other side. The docking structure includes a limiting ring, a triangular cylinder, a support rod, an arc-shaped support block, and an elastic tension spring. The positioning ring is installed in the first arc-shaped groove on the inner side of the workbench. The side wall of the positioning ring has a through hole for the support rod to pass through. The outer end of the support rod is fixedly connected to the arc-shaped support block. An elastic tension spring is installed between the arc-shaped support block and the positioning ring. The inner end of the support rod has a slot. The triangular tube is concentrically installed in the positioning ring. The tube wall of the triangular tube and the slot of the support rod are matched one by one. The outer end of the telescopic arc-shaped rod is evenly provided with multiple sets of first inclined surfaces along the circumference. The support rod has a second inclined surface corresponding to the first inclined surface on the side facing the telescopic arc-shaped rod.

[0006] Furthermore, a limiting disc is threadedly connected to the center of the limiting ring on the side away from the telescopic arc rod. The limiting disc is used to limit the triangular cylinder. An arc-shaped piston rod is connected to the center of the limiting disc. The arc-shaped piston rod is slidably sealed in a second arc-shaped groove on the inner side of the worktable. A hydraulic chamber is formed between the arc-shaped piston rod and the second arc-shaped groove. A hydraulic channel communicating with the hydraulic chamber is opened on the inner side of the worktable. A hydraulic pump is connected to the outer interface of the hydraulic channel.

[0007] Furthermore, the telescopic arc rod includes an outer arc rod and an inner arc rod. One end of the inner arc rod is fixedly connected to the worktable, and the other end of the inner arc rod is slidably disposed at one end of the outer arc rod. A first inclined surface is formed on the outer arc rod of the telescopic arc rod. The inner arc rod and the outer arc rod are fixed together by a locking device. A third arc groove communicating with the first arc groove is provided in the worktable, and the outer arc rod is fitted into the third arc groove.

[0008] Furthermore, the outer side of the arc-shaped support block is provided with a rubber surface.

[0009] Furthermore, the positioning structure includes a first hydraulic cylinder and a support leg. The first hydraulic cylinder is arranged at each of the four corners of the worktable. The first hydraulic cylinder is fixed vertically to the side of the worktable, and the output end of the first hydraulic cylinder extends downward and connects to the support leg.

[0010] Furthermore, an outer annular guide rail is concentrically arranged on the outer side of the inner annular guide rail. An annular guardrail is fixed on the upper side of the outer annular guide rail. A support platform is slidably arranged on the outer annular guide rail. A clamp for fixing the support platform is installed on the annular guardrail. The support platform corresponds to the worktable one by one. A slide is slidably arranged on the upper side of the support platform along the radial direction. A radial support is connected between the slide and the worktable. A shock absorber is arranged between the slide and the support platform.

[0011] Furthermore, a radial guide rail is fixed on the upper side of the support platform, and the radial guide rail extends radially along the outer annular guide rail. A radial groove that mates with the radial guide rail is provided on the lower side of the slide table. The two ends of the shock absorber are connected to the slide table and the support platform, respectively.

[0012] Furthermore, the radial support includes an outer slide rail, a first hinge shaft, a first sliding shaft, a first connecting rod, a second connecting rod, a second hinge shaft, a third hinge shaft, a second sliding shaft, a second hydraulic cylinder, and an inner slide rail. The outer slide rail and the inner slide rail are respectively fixed to the sides of the slide table and the worktable. The first hinge shaft is installed at one end of the outer slide rail, and the first sliding shaft is slidably disposed at the other end of the outer slide rail. The second hinge shaft is slidably installed at one end of the inner slide rail, and the second sliding shaft is slidably disposed at the other end of the inner slide rail. The first connecting rod and the second connecting rod are intersected between the outer slide rail and the inner slide rail, and their middle parts are hinged by the third hinge shaft. One end of the first connecting rod is hinged to the first hinge shaft, and the other end of the first connecting rod is hinged to the second sliding shaft. One end of the second connecting rod is hinged to the first sliding shaft, and the other end of the second connecting rod is hinged to the second hinge shaft. The second hydraulic cylinder is fixed to the outer slide rail, and the output end of the second hydraulic cylinder is connected to the first sliding shaft.

[0013] The beneficial effects of this invention are as follows:

[0014] This invention discloses a multi-station welding workstation. By designing multiple sets of worktables around the welding robotic arm, the operating radii of these worktables are adapted to the rotation radius of the welding robotic arm. With the robotic arm's own rotational action, multiple products can be simultaneously installed and put on the line, reducing tooling disassembly and assembly, and enabling co-line welding of multiple product models. Simultaneously, the circular multi-station cyclic layout allows for simultaneous workpiece loading / unloading and welding operations, eliminating robot idle time. The standardized tooling positioning structure of this invention significantly shortens product changeover and machine adjustment time, flexibly adapts to multi-category, small-batch production, and steadily improves overall production capacity.

[0015] In this invention, adjacent sets of workbenches can be connected via a telescopic arc-shaped rod and a docking structure. Therefore, the number of workbenches can be increased or decreased as needed, making it convenient to use. Furthermore, once the annular position of the workbenches is determined, their position can be fixed using a positioning structure, facilitating subsequent welding work. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the docking structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the docking structure;

[0020] Figure 4 This is a schematic diagram of the triangular cylinder structure;

[0021] Figure 5 This is a schematic diagram of the radial support component.

[0022] The following are labeled in the attached diagram: 1. Annular inner guide rail; 2. Welding robotic arm; 3. Worktable; 4. Positioning structure; 5. Telescopic arc-shaped rod; 6. Docking structure; 7. Limiting ring; 8. Triangular cylinder; 9. Support rod; 10. Arc-shaped support block; 11. Elastic tension spring; 12. First arc-shaped groove; 13. Through hole; 14. Slot; 15. First inclined surface; 16. Second inclined surface; 17. Limiting plate; 18. Arc-shaped piston rod; 19. Second arc-shaped groove; 20. Hydraulic chamber; 21. Hydraulic channel; 22. Outer arc-shaped rod; 23. Inner arc-shaped rod. 23. Locking component; 24. Third arc groove; 25. Rubber surface; 26. First hydraulic cylinder; 27. Support leg; 28. Annular outer guide rail; 29. ​​Annular guardrail; 30. Support platform; 31. Clamp; 32. Slide table; 33. Shock absorber; 34. Radial guide rail; 35. Outer slide rail; 36. First hinge shaft; 37. First sliding shaft; 38. First connecting rod; 39. Second connecting rod; 40. Second hinge shaft; 41. Third hinge shaft; 42. Second sliding shaft; 43. Second hydraulic cylinder; 44. Inner slide rail; 45. Detailed Implementation

[0023] like Figures 1-5 As shown, this invention discloses a multi-station welding workstation, including an annular inner guide rail 1 and a welding robotic arm 2 installed at the center of the annular inner guide rail 1. The annular inner guide rail 1 can be fixed on the foundation of the factory. Multiple sets of worktables 3 are arranged circumferentially on the annular inner guide rail 1, with the same spacing between adjacent worktables 3. The cross-section of the annular inner guide rail 1 is I-shaped, and at least one set of worktables 3 is equipped with a positioning structure 4. A telescopic arc rod 5 is installed on one side of the worktable 3, and a docking structure 6 corresponding to the telescopic arc rod 5 is installed on the other side. By designing multiple sets of worktables 3 around the welding robotic arm 2, the operating radius of the multiple sets of worktables 3 is adapted to the rotation radius of the welding robotic arm 2. Under the rotational cooperation of the welding robotic arm 2 itself, multiple products can be installed and put on the line at the same time, reducing the disassembly and assembly of tooling, realizing the co-line welding processing of multiple models of products. At the same time, the annular multi-station cyclic layout can simultaneously complete the loading and unloading of workpieces and welding operations, eliminating robot standby time. The standardized tooling positioning structure 4 of this invention can significantly shorten the time spent on product changeover and machine adjustment, flexibly adapt to the production of multiple categories of small batches, and steadily improve overall production capacity.

[0024] Specifically, the docking structure 6 disclosed in this invention includes a limiting ring 7, a triangular tube 8, a support rod 9, an arc-shaped support block 10, and an elastic tension spring 11. The limiting ring 7 is installed in the first arc-shaped groove 12 opened on the inner side of the workbench 3. A through hole 13 is opened on the side wall of the limiting ring 7 for the support rod 9 to pass through. The outer end of the support rod 9 is fixedly connected to the arc-shaped support block 10. An elastic tension spring 11 is installed between the arc-shaped support block 10 and the limiting ring 7. A slot 14 is opened on the inner end of the support rod 9. The triangular tube 8 is concentrically installed in the limiting ring 7. The tube wall of the triangular tube 8 and the slot 14 of the support rod 9 are matched one-to-one. Multiple sets of first inclined surfaces 15 are evenly arranged along the circumference of the outer end of the telescopic arc-shaped rod 5. A second inclined surface 16 corresponding to the first inclined surface 15 is formed on the side of the support rod 9 facing the telescopic arc-shaped rod 5. When the telescopic arc rod 5 is inserted into the limiting ring 7, the first inclined surface 15 and the second inclined surface 16 cooperate to drive the support rod 9 to move radially outward. Under the guidance of the through hole 13, the arc support block 10 can be driven to tightly fit against the inner wall of the first arc groove 12, realizing rapid docking of the device. The worktable 3 designed along the annular inner guide rail 1 can be added or removed as needed, making it convenient to use. At the same time, after the annular position of the worktable 3 is determined, the position of the worktable 3 can be fixed by the positioning structure 4, which facilitates subsequent welding work.

[0025] This invention achieves rigid or semi-rigid mechanical locking between worktables 3 through the guiding action of the second inclined surface 16 of the support rod 9 and the first inclined surface 15 of the telescopic arc rod 5. This enables rapid connection while significantly resisting tangential impact forces caused by high-speed movement of the robotic arm or eccentric load of the workpiece during welding. This ensures that even when some worktables 3 are in a non-fixed state, the geometric coaxiality and positional accuracy of the entire ring chain can still be maintained within the tolerance range allowed by the welding process.

[0026] In this embodiment, a limiting ring 7 is threadedly connected to a limiting disc 17 on the side away from the telescopic arc-shaped rod 5. The limiting disc 17 is used to limit the triangular cylinder 8, providing a convenient axial positioning and disassembly / maintenance channel for the triangular cylinder 8. An arc-shaped piston rod 18 is connected to the center of the limiting disc 17. The arc-shaped piston rod 18 is slidably sealed within a second arc-shaped groove 19 opened on the inner side of the worktable 3. A hydraulic chamber 20 is formed between the arc-shaped piston rod 18 and the second arc-shaped groove 19. A hydraulic channel 21 communicating with the hydraulic chamber 20 is opened on the inner side of the worktable 3. A hydraulic pump is connected to the outer interface of the hydraulic channel 21. When the hydraulic pump injects pressurized oil into the sealed chamber through the hydraulic channel 21, the arc-shaped piston rod 18 will drive the limiting disc 17 and the triangular cylinder 8 to generate axial displacement, which can adjust the limiting position to meet actual needs.

[0027] In this embodiment, the telescopic arc rod 5 includes an outer arc rod 22 and an inner arc rod 23. One end of the inner arc rod 23 is fixedly connected to the worktable 3, and the other end of the inner arc rod 23 is slidably disposed at one end of the outer arc rod 22. A first inclined surface 15 is formed on the outer arc rod 22 of the telescopic arc rod 5. The inner arc rod 23 and the outer arc rod 22 are fixed together by a locking member 24. The worktable 3 is provided with a third arc groove 25 communicating with the first arc groove 12. The outer arc rod 22 is fitted into the third arc groove 25. The circumferential distance between adjacent worktables 3 can be easily adjusted by the locking member 24, thereby optimizing the station layout density. When it is necessary to clamp large workpieces across worktables, by releasing the locking member 24 and driving the outer arc rod 22 to slide in the third arc groove 25, the limited adjustment of the distance between worktables 3 can be quickly realized, which not only ensures the convenience of connection, but also maintains the high structural rigidity of the system.

[0028] In this embodiment, the outer side of the arc-shaped support block 10 is provided with a rubber surface 26, which can play a damping and buffering role, and at the same time greatly increases the static friction coefficient, making it less likely for relative creep and slippage to occur between the worktables 3 when subjected to alternating loads.

[0029] In this embodiment, the positioning structure 4 includes a first hydraulic cylinder 27 and a support leg 28. A first hydraulic cylinder 27 is arranged at each of the four corners of the workbench 3. The first hydraulic cylinder 27 is fixed vertically to the side of the workbench 3, and its output end extends downwards to connect to the support leg 28. When the workbench 3 is connected via the telescopic arc rod 5 and slides along the annular inner guide rail 1 to the preset welding position, the first hydraulic cylinder 27 extends simultaneously, firmly pressing the support leg 28 onto the workshop floor or a dedicated base. This changes the load-bearing method of the workbench 3 from guide rail rolling contact to static pressure support contact, facilitating the fixation of its position.

[0030] In this embodiment, an outer annular guide rail 29 is concentrically arranged on the outer side of the inner annular guide rail 1. An annular guardrail 30 is fixed on the upper side of the outer annular guide rail 29. A support platform 31 is slidably arranged on the outer annular guide rail 29. A clamp 32 for fixing the support platform 31 is installed on the guardrail 30. The support platform 31 corresponds one-to-one with the worktable 3. A slide table 33 is slidably arranged radially on the upper side of the support platform 31. A radial support member is connected between the slide table 33 and the worktable 3. A shock absorber 34 is arranged between the slide table 33 and the support platform 31. When the welding robot arm 2 performs a rapid start-stop or sharp turn at a certain workstation, the reaction force generated will first drive the slide table 33 to slide slightly along the radial guide rail 35. This sliding kinetic energy is then absorbed by the shock absorber 34 and converted into heat energy, rather than directly impacting the inner guide rail. This significantly reduces the cumulative vibration level of the entire annular base and ensures that the calibration origin of each worktable 3 relative to the coordinate system of the welding robot arm 2 base does not drift during long-term operation.

[0031] This embodiment of the invention only shows one set of support platforms 31 to facilitate the expression of their position and structural relationship. In actual implementation, the number of support platforms 31 corresponds one-to-one with the number of worktables.

[0032] In this embodiment, a radial guide rail 35 is fixed on the upper side of the support platform 31. The radial guide rail 35 extends radially along the annular outer guide rail 29. A radial groove that mates with the radial guide rail 35 is provided on the lower side of the slide table 33. The two ends of the shock absorber 34 are connected to the slide table 33 and the support platform 31, respectively.

[0033] In this embodiment, the radial support includes an outer slide rail 36, a first hinge shaft 37, a first sliding shaft 38, a first connecting rod 39, a second connecting rod 40, a second hinge shaft 41, a third hinge shaft 42, a second sliding shaft 43, a second hydraulic cylinder 44, and an inner slide rail 45. The outer slide rail 36 and the inner slide rail 45 are respectively fixed to the sides of the slide table 33 and the worktable 3. The first hinge shaft 37 is installed at one end of the outer slide rail 36, and the first sliding shaft 38 is slidably disposed at the other end of the outer slide rail 36. The second hinge shaft 41 is slidably installed at one end of the inner slide rail 45, and the second sliding shaft... The slide 33 is slidably mounted at the other end of the inner slide rail 45. The first connecting rod 39 and the second connecting rod 40 are cross-mounted between the outer slide rail 36 and the inner slide rail 45, and their middle parts are hinged by the third hinge shaft 42. One end of the first connecting rod 39 is hinged to the first hinge shaft 37, and the other end of the first connecting rod 39 is hinged to the second sliding shaft 43. One end of the second connecting rod 40 is hinged to the first sliding shaft 38, and the other end of the second connecting rod 40 is hinged to the second hinge shaft 41. The second hydraulic cylinder 44 is fixed to the outer slide rail 36, and the output end of the second hydraulic cylinder 44 is connected to the first sliding shaft 38. When the second hydraulic cylinder 44 drives the first sliding shaft 38 to slide along the outer slide rail 36, it will simultaneously change the opening and closing angle of the scissor mechanism, thereby precisely and linearly adjusting the radial distance between the slide 33 and the worktable 3, providing a certain preload to the worktable 3. This preload allows the shock absorber 34 to achieve a better working state and meet actual needs.

Claims

1. A multi-station welding workstation, characterized in that: The system includes an inner annular guide rail and a welding robotic arm installed at the center of the inner annular guide rail. Multiple sets of worktables are spaced circumferentially along the inner annular guide rail, with equal spacing between adjacent worktables. The inner annular guide rail has an I-shaped cross-section, and at least one set of worktables is equipped with a positioning structure. A telescopic arc-shaped rod is installed on one side of each worktable, and a corresponding docking structure is installed on the other side. The docking structure includes a limiting ring, a triangular tube, a support rod, an arc-shaped support block, and an elastic spring. The limiting ring is installed in a first arc-shaped groove on the inner side of the worktable. A through hole for the support rod to pass through is opened on the side wall of the limiting ring. The outer end of the support rod is fixedly connected to the arc-shaped support block. An elastic spring is installed between the arc-shaped support block and the limiting ring. A slot is opened at the inner end of the support rod. The triangular tube is concentrically installed within the limiting ring, and the tube wall of the triangular tube corresponds to the slot of the support rod. Multiple sets of first inclined surfaces are evenly arranged circumferentially on the outer end of the telescopic arc-shaped rod, and a second inclined surface corresponding to the first inclined surface is formed on the side of the support rod facing the telescopic arc-shaped rod.

2. The multi-station welding workstation according to claim 1, characterized in that: The center thread of the limiting ring on the side away from the telescopic arc rod is connected to a limiting plate. The limiting plate is used to limit the triangular cylinder. The center of the limiting plate is connected to an arc-shaped piston rod. The arc-shaped piston rod is slidably sealed in the second arc-shaped groove opened on the inner side of the worktable. A hydraulic chamber is formed between the arc-shaped piston rod and the second arc-shaped groove. A hydraulic channel communicating with the hydraulic chamber is opened on the inner side of the worktable. A hydraulic pump is connected to the outer interface of the hydraulic channel.

3. A multi-station welding workstation according to claim 2, characterized in that: The telescopic arc rod includes an outer arc rod and an inner arc rod. One end of the inner arc rod is fixedly connected to the worktable, and the other end of the inner arc rod is slidably disposed at one end of the outer arc rod. A first inclined surface is formed on the outer arc rod of the telescopic arc rod. The inner arc rod and the outer arc rod are fixed together by a locking device. A third arc groove communicating with the first arc groove is provided in the worktable, and the outer arc rod is fitted into the third arc groove.

4. A multi-station welding workstation according to claim 3, characterized in that: The outer side of the arc-shaped support block is provided with a rubber surface.

5. A multi-station welding workstation according to claim 4, characterized in that: The positioning structure includes a first hydraulic cylinder and a support leg. The first hydraulic cylinder is arranged at each of the four corners of the worktable. The first hydraulic cylinder is fixed vertically to the side of the worktable, and the output end of the first hydraulic cylinder extends downward and connects to the support leg.

6. A multi-station welding workstation according to any one of claims 1-5, characterized in that: An annular outer guide rail is concentrically arranged on the outer side of the annular inner guide rail. An annular guardrail is fixed on the upper side of the annular outer guide rail. A support platform is slidably arranged on the annular outer guide rail. A clamp for fixing the support platform is installed on the annular guardrail. The support platform corresponds to the worktable one by one. A slide is slidably arranged on the upper side of the support platform along the radial direction. A radial support is connected between the slide and the worktable. A shock-absorbing component is arranged between the slide and the support platform.

7. A multi-station welding workstation according to claim 6, characterized in that: A radial guide rail is fixed on the upper side of the support platform. The radial guide rail extends radially along the outer annular guide rail. A radial groove that mates with the radial guide rail is provided on the lower side of the slide table. The two ends of the shock absorber are connected to the slide table and the support platform, respectively.

8. A multi-station welding workstation according to claim 7, characterized in that: The radial support includes an outer slide rail, a first hinge shaft, a first sliding shaft, a first connecting rod, a second connecting rod, a second hinge shaft, a third hinge shaft, a second sliding shaft, a second hydraulic cylinder, and an inner slide rail. The outer and inner slide rails are fixed to the sides of the slide table and the worktable, respectively. The first hinge shaft is installed at one end of the outer slide rail, and the first sliding shaft is slidably disposed at the other end of the outer slide rail. The second hinge shaft is slidably installed at one end of the inner slide rail, and the second sliding shaft is slidably disposed at the other end of the inner slide rail. The first and second connecting rods are intersecting between the outer and inner slide rails, and their middle parts are hinged together by the third hinge shaft. One end of the first connecting rod is hinged to the first hinge shaft, and the other end of the first connecting rod is hinged to the second sliding shaft. One end of the second connecting rod is hinged to the first sliding shaft, and the other end of the second connecting rod is hinged to the second hinge shaft. The second hydraulic cylinder is fixed to the outer slide rail, and the output end of the second hydraulic cylinder is connected to the first sliding shaft.

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