Non-standard equipment machining center
By introducing visual inspection probes and feeding robots into non-standard equipment processing centers, and combining them with a database, the automated identification and processing of non-standard equipment is achieved, solving the problem of non-standard equipment being unable to be processed in batches, and improving processing efficiency and accuracy.
Patent Information
- Application Number
- CN202311366302.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-20
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2043-10-20
AI Technical Summary
Non-standard equipment cannot be mass-produced and processed due to the different shapes of its components, and traditional on-site processing technology is inefficient.
Using non-standard equipment machining centers, equipped with vision inspection probes and feeding robots, combined with a processing database, we can achieve automatic identification, gripping and welding of different materials.
It improves the processing efficiency and precision of non-standard equipment, enables centralized processing and welding of various parts, and reduces manual intervention.
Smart Images

Figure CN117428547B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of welding processing technology, specifically to a non-standard equipment processing center. Background Technology
[0002] The electromechanical equipment in industrial plant and mining production systems mainly includes standard and non-standard equipment. Standard equipment is generally manufactured in factories by specialized equipment manufacturers using mass production lines. Non-standard equipment, however, varies from factory to factory, leading to the prevalence of on-site processing. Traditional on-site processing typically involves setting up a non-standard processing area on the construction site, laying out steel platforms, manually laying out the layout, and using flame cutting, semi-automatic cutting machines, or CNC cutting machines for cutting and blanking. Cranes and manual labor are then used for on-site fabrication, assembly, and joining, followed by welding. Finally, manual rust removal and painting are performed. With the widespread application of various robots, such as CNC cutting and welding robots, in industrial enterprises, a non-standard equipment processing center is needed to enable intelligent, factory-style on-site fabrication and processing of non-standard equipment. Summary of the Invention
[0003] This invention proposes a non-standard equipment processing center, which solves the problem in related technologies that non-standard equipment cannot be mass-produced and processed due to the different shapes of its components.
[0004] The technical solution of the present invention is as follows:
[0005] A non-standard equipment processing center includes a processing table and a feeding assembly located on one side of the processing table. The feeding assembly includes a feeding platform and a feeding robot, which is located between the feeding platform and the processing table. The feeding assembly also includes a vision detection probe, which is disposed on the feeding platform and is used to detect materials passing through the feeding platform.
[0006] As a further technical solution, the feeding robot includes,
[0007] The first base body is rotatably mounted on the processing table.
[0008] An arm body, one end of which is mounted on the first base body, rotates with the processing table.
[0009] The gripper assembly includes,
[0010] A connecting seat is rotatably mounted at the other end of the arm body.
[0011] The gripping components, one end of each of the two gripping components, are hinged to the connecting seat.
[0012] An adjusting component, one end of which is slidably mounted on the machining table.
[0013] A first wheel is rotatably disposed at the other end of the adjusting member. The rotation direction of the first wheel is parallel to the swing direction of the gripping member. The first wheel contacts the material to drive the connecting seat to rotate.
[0014] As a further technical solution, the gripper includes,
[0015] A swing arm, one end of which is hinged to the bottom of the connecting seat.
[0016] A rotating component is hinged at the middle to the other end of the swing rod. One end of the rotating component has a rotatable second wheel, and the other end of the rotating component has a hook for hooking up materials.
[0017] As a further technical solution, the connecting seat has a strip-shaped hole, the adjusting member passes through the strip-shaped hole, and the adjusting member has strip-shaped grooves on both sides; it also includes,
[0018] A drive shaft is rotatably mounted on the connecting seat, with one end of the drive shaft slidably disposed within the strip groove. Rotation of the drive shaft drives the adjusting member to swing.
[0019] An elastic element, one end of which is disposed in the strip groove, and the other end of which is connected to the drive shaft.
[0020] As a further technical solution, the processing table includes,
[0021] Base
[0022] The system includes two swing seats, each swinging on the base and forming a feeding space. The two swing seats swing in opposite directions.
[0023] A drive roller is rotatably mounted on the base and located between the two swing seats. The drive roller is lower than the two swing seats in the vertical direction.
[0024] As a further technical solution, the processing table also includes,
[0025] The first sliding seat, both of which are slidably disposed on the base, slides closer to or further away from each other, and the two swing seats are respectively disposed on the two first sliding seats, and the swing seats slide with the first sliding seats.
[0026] As a further technical solution, it also includes a welding assembly and a receiving bin, wherein the receiving bin, the feeding platform, and the feeding robot are distributed in a straight line, and the feeding robot is located between the feeding platform and the receiving bin; the welding assembly includes...
[0027] Welding robot,
[0028] A slide rail is provided, parallel to the processing table, and also parallel to the receiving bin, the feeding platform, and the feeding robot. The slide rail is located between the processing table and the feeding robot.
[0029] The second sliding seat is slidably mounted on the slide rail, and the welding robot is mounted on the second sliding seat. The slide rail follows the second sliding seat.
[0030] As a further technical solution, the arm body includes,
[0031] The first telescopic rod has one end hinged to the first base.
[0032] A connecting frame, one end of which is hinged to the other end of the first telescopic rod, and the other end of which is connected to the connecting seat.
[0033] As a further technical solution, the welding robot includes,
[0034] The second seat is rotatably mounted on the second sliding seat.
[0035] The first connecting rod, one end of which is hinged to the second base body.
[0036] The second link has one end hinged to the other end of the first link.
[0037] A welding head, which is hinged to the other end of the second connecting rod.
[0038] The working principle and beneficial effects of this invention are as follows:
[0039] In this invention, to solve the aforementioned technical problems, a vision inspection probe is installed on the feeding platform. During operation, the vision inspection probe is used to detect the shape and size of different materials. Because a database is set up in advance, the shape and size of different parts are recorded and the data of different materials are stored. When the material passes through the feeding platform, the vision inspection probe will feed back the size data of the material to the control center. The control center controls the feeding robot to grab the material. The feeding robot grabs the material to the processing table and places it according to the setting position of the processing drawing. Finally, the welding robot will weld the set material. The processing center includes a feeding area, a processing area and a finished product area. The feeding area is used to feed materials onto the feeding platform, the processing area is used to process the materials, and the finished product area and the processing bin are connected through the receiving bin.
[0040] Beneficial effects: By setting up visual inspection probes in conjunction with a processing database, different materials can be identified, and after identification, they can be directly grasped and placed for final welding, making processing more convenient, efficient, and effective. It also allows for the centralized processing of various different parts. Attached Figure Description
[0041] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0042] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0043] Figure 2 For the present invention Figure 1 Enlarged view of a portion of point A in the middle;
[0044] Figure 3 This is a schematic diagram of the feeding assembly structure of the present invention;
[0045] Figure 4 This is a schematic diagram of the rotating component structure of the present invention;
[0046] Figure 5 This is a schematic diagram of the connector structure of the present invention;
[0047] Figure 6 This is a schematic diagram of the processing table structure of the present invention;
[0048] In the diagram: 1. Processing table, 2. Feeding table, 3. Feeding robot, 4. Vision inspection probe, 5. First base, 6. Arm, 7. Connecting seat, 8. Gripper, 9. Adjusting component, 10. First wheel, 11. Swing rod, 12. Rotating component, 13. Hook, 14. Strip hole, 15. Strip groove, 16. Drive shaft, 18. Elastic component, 19. Base, 20. Swinging seat, 21. Drive roller, 22. First sliding seat, 23. Receiving bin, 24. Welding robot, 25. Slide rail, 26. Second sliding seat, 27. First telescopic rod, 28. Connecting frame, 29. Second base, 30. First connecting rod, 31. Second connecting rod, 32. Welding head, 33. Second wheel. Detailed Implementation
[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0050] like Figures 1-6 As shown, this embodiment proposes...
[0051] A non-standard equipment processing center includes a processing table 1 and a feeding assembly located on one side of the processing table 1. The feeding assembly includes a feeding platform 2 and a feeding robot 3. The feeding robot 3 is located between the feeding platform 2 and the processing table 1. The feeding assembly also includes a vision detection probe 4, which is disposed on the feeding platform 2 and is used to detect the material passing through the feeding platform 2.
[0052] In this embodiment, to solve the aforementioned technical problems, a vision inspection probe 4 is installed on the feeding table 2. During operation, the vision inspection probe 4 is used to detect the shape and size of different materials. Because a database is set up in advance to record the shape and size of different parts and store the data of different materials, when the material passes through the feeding table 2, the vision inspection probe 4 will feed back the size data of the material to the control center. The control center controls the feeding robot 3 to grasp the material. The feeding robot 3 grasps the material and places it at the processing table 1, according to the setting position on the processing drawing. Finally, the welding robot 24 will weld the set material.
[0053] By setting up a visual inspection probe 4 in conjunction with a processing database, different materials can be identified. After identification, they can be directly grasped and placed for final welding, making processing more convenient, efficient, and effective. It also allows for the centralized processing of various different parts.
[0054] Furthermore, the feeding robot 3 includes,
[0055] The first base 5 is rotatably mounted on the processing table 1.
[0056] Arm 6, one end of which is mounted on the first base 5, rotates with the processing table 1.
[0057] The gripper assembly includes,
[0058] Connecting seat 7, which is rotatably mounted at the other end of the arm body 6.
[0059] Gripping member 8, one end of each of the two gripping members 8 is hinged to the connecting seat 7.
[0060] Adjustment component 9, one end of which is slidably mounted on the processing table 1.
[0061] The first wheel 10 is rotatably disposed at the other end of the adjusting member 9. The rotation direction of the first wheel 10 is parallel to the swing direction of the gripping member 8. The first wheel 10 contacts the material to drive the connecting seat 7 to rotate.
[0062] In this embodiment, the feeding robot 3 includes a first base 5, an arm 6, and a gripper assembly. The first base 5 is rotatably mounted on the processing table 1. One end of the arm 6 is mounted on the first base 5 and rotates with the processing table 1. The gripper assembly includes a connecting seat 7, a gripping member 8, an adjusting member 9, and a first wheel 10. The connecting seat 7 is rotatably mounted on the other end of the arm 6. One end of the gripping member 8 is hinged to the connecting seat 7. One end of the adjusting member 9 is slidably mounted on the processing table 1. The first wheel 10 is rotatably mounted on the other end of the adjusting member 9. The rotation direction of the first wheel 10 is parallel to the swing direction of the gripping member 8. The first wheel 10 contacts the material to drive the connecting seat 7 to rotate. During operation, when the material is transported to the feeding table 2, the control center controls the first base 5 to rotate, causing the arm 6 and the gripper assembly to move towards zero. The arm 6 moves the gripper assembly downwards towards the component. Since the components are primarily plates or tubes, and their placement varies (taking a tube as an example): when the gripper assembly moves downwards, the first wheel 10 on the adjusting member 9 first contacts the top of the tube. When the material is placed at an angle, the first wheel 10 of the adjusting member 9 rotates along the outer wall of the tube, thereby rotating the first seat 5. Finally, the bottom of the adjusting member 9 moves downwards from both sides of the tube. Because the line connecting the two gripping members 8 is perpendicular to the line connecting the two adjusting members 9, when the adjusting member 9 moves downwards along both sides of the tube, the two gripping members 8 move along the top of the tube. Ultimately, the bottom of the gripping members 8 contacts both ends of the tube, and the gripping members 8 pick up the material from both ends of the tube. For tube components, the adjusting member can automatically adjust the position of the gripping members 8, thereby achieving gripping...
[0063] For the plate parts, the function of the adjusting part 9 is to determine the edge of the plate parts. When it reaches the edge of the plate, the first wheel 10 will abut against the edges of the two plates until the gripping part 8 moves to the two ends of the plate parts to grip them and realize the conveying of different materials.
[0064] Furthermore, the gripper 8 includes,
[0065] The swing rod 11 has one end hinged to the bottom of the connecting seat 7.
[0066] A rotating component 12 is hinged at the middle to the other end of the swing rod 11. One end of the rotating component 12 has a rotatable second wheel 33, and the other end of the rotating component 12 has a hook 13, which is used to hook up materials.
[0067] In this embodiment, the gripping component 8 includes a swing rod 11 and a rotating component 12. One end of the swing rod 11 is hinged to the bottom of the connecting seat 7, and the middle of the rotating component 12 is hinged to the other end of the swing rod 11. One end of the rotating component 12 has a rotatable second wheel 33, and the other end of the rotating component 12 has a hook 13. The hook 13 is used to hook up materials. During operation, before the gripping component 8 moves to both ends of the part, the gripping component 8 contacts the part through the second wheel 33. After moving to both ends of the part, the rotating component 12 rotates, switching the second wheel 33 to the hook 13. The hook 13 extends into the inside of the tube, thereby hooking up the part.
[0068] Furthermore, the connecting seat 7 has a strip-shaped hole 14, the adjusting member 9 passes through the strip-shaped hole 14, and the adjusting member 9 has strip-shaped grooves 15 on both sides; it also includes,
[0069] Drive shaft 16 is rotatably mounted on the connecting seat 7, and one end of drive shaft 16 is slidably mounted in the strip groove 15. Rotation of drive shaft 16 is used to drive the adjusting member 9 to swing.
[0070] An elastic element 18 is provided at one end in the strip groove 15 and at the other end is connected to the drive shaft 16.
[0071] In this embodiment, the connecting seat 7 has a strip-shaped hole 14, through which the adjusting member 9 passes. The adjusting member 9 has strip-shaped grooves 15 on both sides. It also includes a drive shaft 16 and an elastic member 18. The drive shaft 16 is rotatably mounted on the connecting seat 7. One end of the drive shaft 16 is slidably mounted in the strip-shaped groove 15. The rotation of the drive shaft 16 is used to drive the adjusting member 9 to swing. One end of the elastic member 18 is mounted in the strip-shaped groove 15, and the other end of the elastic member 18 is connected to the drive shaft 16. During operation, when the adjusting member 9 moves along both sides of the material, and when the adjusting member 9 contacts the surface of the processing table 1, it will slide along the strip-shaped hole 14, thereby compressing the elastic member 18. Because different parts have different sizes, the drive shaft 16 is set to rotate the adjusting member, so that the distance between the two adjusting members increases or decreases, thereby adapting to the gripping of different parts. The strip-shaped groove 15 and one end of the drive shaft 16 sliding in the strip-shaped groove 15 need to have shape limitations to prevent one end of the drive shaft 16 from sliding along the strip-shaped groove 15 but not being able to drive the adjusting member to rotate.
[0072] Furthermore, the processing table 1 includes,
[0073] Base 19,
[0074] There are two swing seats 20, each swinging on the base 19. The two swing seats 20 form a feeding space, and they swing in opposite directions.
[0075] A drive roller 21 is rotatably mounted on the base 19. The drive roller 21 is located between the two swing seats 20, and the height of the drive roller 21 in the vertical direction is lower than that of the two swing seats 20.
[0076] In this embodiment, the processing table 1 includes a swing seat 20 and a drive roller 21. There are two swing seats 20, both of which are swing-mounted on the base 19. The two swing seats 20 form a feeding space. The two swing seats 20 swing in opposite directions. The drive roller 21 is rotatably mounted on the base 19 and is located between the two swing seats 20. The height of the drive roller 21 in the vertical direction is lower than that of the two swing seats 20. When processing tube parts, the swing seats 20 swing and form a recessed space with the drive roller 21, which allows the tube to weld two complete welds during the welding process, thereby improving the welding effect.
[0077] Furthermore, the processing table 1 also includes,
[0078] The first sliding seat 22 is slidably disposed on the base 19. The two first sliding seats 22 slide closer to each other or further away from each other. The two swing seats 20 are respectively disposed on the two first sliding seats 22. The swing seats 20 slide with the first sliding seats 22.
[0079] In this embodiment, the processing table 1 also includes a first sliding seat 22. Both first sliding seats 22 are slidably disposed on the base 19. The two first sliding seats are close to or far from each other. Two swing seats 20 are respectively disposed on the two first sliding seats 22. The swing seats 20 slide with the first sliding seats 22. During operation, since the pipe diameters of different pipe parts are different, the distance between the two swing seats 20 can be adjusted to adjust the materials of different pipe diameters and improve the welding effect.
[0080] Furthermore, it also includes a welding assembly and a receiving bin 23. The receiving bin 23, the feeding platform 2, and the feeding robot 3 are distributed in a straight line. The feeding robot 3 is located between the feeding platform 2 and the receiving bin 23. The welding assembly includes...
[0081] Welding robot 24,
[0082] The slide rail 25 is arranged parallel to the processing table 1, and is also arranged parallel to the receiving bin 23, the feeding table 2, and the feeding robot 3. The slide rail 25 is located between the processing table 1 and the feeding robot 3.
[0083] The second sliding seat 26 is slidably disposed on the slide rail 25, and the welding robot 24 is disposed on the second sliding seat 26. The slide rail 25 follows the second sliding seat 26.
[0084] In this embodiment, a welding assembly and a receiving bin 23 are also included. The receiving bin 23, the feeding platform 2, and the feeding robot 3 are distributed in a straight line. The feeding robot 3 is located between the feeding platform 2 and the receiving bin 23. The welding assembly includes a welding robot 24, a slide rail 25, and a second sliding seat 26. The slide rail 25 is arranged parallel to the processing table 1 and parallel to the receiving bin 23, the feeding platform 2, and the feeding robot 3. The slide rail 25 is located between the processing table 1 and the feeding robot 3. The second sliding seat 26 is slidably mounted on the slide rail 25. The welding machine... The robotic arm 24 is mounted on the second sliding seat 26, and the slide rail 25 slides along the second sliding seat 26. During operation, the receiving bin 23, the feeding table 2, and the feeding robotic arm 3 are arranged in a straight line, which facilitates the feeding robotic arm 3 to transport materials to the worktable and also facilitates the feeding robotic arm 3 to remove materials from the worktable after the parts are processed. The welding robotic arm 24 is mounted between the processing table 1 and the feeding robotic arm 3 via the slide rail 25, which facilitates the welding robotic arm 24 to process the parts, thereby realizing the welding of the whole parts and improving processing efficiency.
[0085] Furthermore, the arm body 6 includes,
[0086] The first telescopic rod 27 is hinged at one end to the first base 5.
[0087] A connecting frame 28 is provided, with one end of the connecting frame 28 hinged to the other end of the first telescopic rod 27, and the other end of the connecting frame 28 connected to the connecting seat 7.
[0088] In this embodiment, the arm 6 includes a first telescopic rod 27 and a connecting frame 28. One end of the first telescopic rod 27 is mounted on the first base 5, and one end of the connecting frame 28 is hinged to the other end of the first telescopic rod 27. The other end of the connecting frame 28 is connected to the connecting seat 7. During operation, the first telescopic rod 27 is used to adjust the horizontal position of the gripper assembly. The first base 5 drives the arm 6 to rotate to adjust the orientation of the telescopic rod. The connecting frame 28 is used to adjust the orientation of the gripper assembly in the vertical direction. Through the structure of the gripper assembly, the arm 6 can achieve overall gripping by adjusting only three directions.
[0089] Furthermore, the welding robot 24 includes,
[0090] The second seat 29 is rotatably mounted on the second sliding seat 26.
[0091] The first connecting rod 30 has one end hinged to the second base 29.
[0092] The second link 31 has one end hinged to the other end of the first link 30.
[0093] Welding head 32, which is hinged to the other end of the second connecting rod 31.
[0094] In this embodiment, the welding robot 24 includes a second base, a first connecting rod 30, a second connecting rod 31, and a welding head 32. The second base 29 is rotatably mounted on the second base 29. One end of the first connecting rod 30 is hinged to the second base 29, and one end of the second connecting rod 31 is hinged to the other end of the first connecting rod 30. The welding head 32 is hinged to the other end of the second connecting rod 31. During operation, the second base 29 is used to adjust the horizontal orientation, and the first connecting rod 30 and the second connecting rod 31 are used to adjust the specific position of the welding head 32, thereby achieving precise machining of the parts.
[0095] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 non-standard machine tool processing center, characterized in that, The device comprises a processing table (1) and a feeding assembly located on one side of the processing table (1), the feeding assembly comprises a feeding table (2) and a feeding manipulator (3), the feeding manipulator (3) is located between the feeding table (2) and the processing table (1), and the feeding assembly further comprises a visual detection probe (4) arranged on the feeding table (2), the visual detection probe (4) is used for detecting materials passing through the feeding table (2); The feeding manipulator (3) comprises, a first seat body (5) rotatably arranged on the processing table (1), an arm body (6) arranged at one end of the first seat body (5), the arm body (6) rotates with the processing table (1), a gripper assembly comprising, a connecting seat (7) rotatably arranged at the other end of the arm body (6), two gripping pieces (8) hingedly connected at one end to the connecting seat (7), an adjusting piece (9) slidably arranged at one end on the processing table (1), and the connecting lines of the two gripping pieces (8) are perpendicular to the connecting lines of the two adjusting pieces (9), a first wheel body (10) rotatably arranged at the other end of the adjusting piece (9), the rotating direction of the first wheel body (10) is parallel to the swinging direction of the gripping piece (8), and the first wheel body (10) is in contact with the material to drive the connecting seat (7) to rotate; The connecting seat (7) has a strip-shaped hole (14), the adjusting piece (9) passes through the strip-shaped hole (14), and the two sides of the adjusting piece (9) have strip-shaped grooves (15); and comprises, a drive shaft (16) rotatably arranged on the connecting seat (7), one end of the drive shaft (16) is slidably arranged in the strip-shaped groove (15), and the drive shaft (16) rotates to drive the adjusting piece (9) to swing a resilient piece (18) arranged at one end in the strip-shaped groove (15), and the other end of the resilient piece (18) is connected with the drive shaft (16); Further comprising a welding assembly and a material collecting bin (23), the material collecting bin (23), the feeding table (2) and the feeding manipulator (3) are arranged in a straight line, the feeding manipulator (3) is located between the feeding table (2) and the material collecting bin (23), and the welding assembly comprises, a welding manipulator (24), a slide rail (25) arranged in parallel with the processing table (1), the slide rail (25) is arranged in parallel with the material collecting bin (23), the feeding table (2) and the feeding manipulator (3), and the slide rail (25) is located between the processing table (1) and the feeding manipulator (3), a second sliding seat (26) slidably arranged on the slide rail (25), and the welding manipulator (24) is arranged on the second sliding seat (26).
2. The non-standard machine tool processing center according to claim 1, characterized in that, The gripping piece (8) comprises, A swing rod (11) is hingedly connected at one end to the bottom of the connecting seat (7), A rotating member (12) is hingedly connected at the middle to the other end of the swing rod (11), the rotating member (12) has a rotatable second wheel body (33) at one end, and a hook body (13) at the other end, which is used to hook materials.
3. The non-standard machine tool processing center according to claim 1, characterized in that, The processing table (1) comprises, A base (19), Two swing seats (20) are swingingly arranged on the base (19), and the two swing seats (20) constitute a material feeding space, and the swing directions of the two swing seats (20) are opposite, A drive roller (21) is rotatably arranged on the base (19), and the drive roller (21) is located between the two swing seats (20), and the height of the drive roller (21) in the vertical direction is lower than that of the two swing seats (20).
4. The non-standard machine tool processing center according to claim 3, characterized in that, The processing table (1) further comprises, Two first sliding seats (22) are slidingly arranged on the base (19), and the two first sliding seats (22) slidingly approach or move away from each other, and the two swing seats (20) are arranged on the two first sliding seats (22) respectively, and the swing seats (20) slide with the first sliding seats (22).
5. The non-standard machine tool processing center according to claim 1, characterized in that, The arm body (6) comprises, A first telescopic rod (27) is hingedly arranged at one end on the first seat body (5), A connecting frame (28) is hingedly connected at one end to the other end of the first telescopic rod (27), and the other end of the connecting frame (28) is connected to the connecting seat (7).
6. The non-standard machine tool processing center according to claim 1, characterized in that, The welding manipulator (24) comprises, A second seat body (29) is rotatably arranged on the second sliding seat (26), A first connecting rod (30) is hingedly connected at one end to the second seat body (29), A second connecting rod (31) is hingedly connected at one end to the other end of the first connecting rod (30), A welding head (32) is hingedly connected to the other end of the second connecting rod (31).
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