Sliding positioning welding device based on bearing

Abstract

The invention relates to the technical field of sliding positioning welding, in particular to a sliding positioning welding device based on a bearing, which comprises an operation platform and a support main body, a sliding connector is arranged at the top end in the support main body, a knob is arranged on one side of the support main body, and a positioning needle seat is arranged in the top end of the sliding connector. One side of the supporting main body is provided with an end catch, the other side of the supporting main body is provided with an end catch, the middle of the end catch is provided with a positioning bolt, one side of the supporting main body is provided with a rotating nut, the supporting main body is internally provided with a stabilizing spring, and the sliding welding positioning device is fixed on an operation platform. Accurate positioning of the workpiece in the sliding welding process is achieved by adjusting the sliding positioning device, the workpiece can smoothly achieve accurate positioning welding through the action point of laser energy in a bearing vertical installation mode, the surface of the workpiece is not prone to being scratched, operation is easy, and the working efficiency is higher.

Description

Technical Field

[0001] The invention relates to the technical field of sliding positioning welding, and more particularly to a sliding positioning welding device based on a bearing. Background Art

[0002] Laser welding machine, also often called laser welding machine, laser welding machine, is a machine used for laser welding of material processing; laser welding machine is also often called laser welding machine, energy negative feedback laser welding machine, laser welding machine, laser welding machine, laser cold welding machine, laser argon welding machine, laser welding equipment; according to its working mode, it can be divided into laser mold welding machine (manual laser welding equipment), automatic laser welding machine, jewelry laser welding machine, laser spot welding machine, fiber optic transmission laser welding machine, galvanometer welding machine, handheld welding machine, etc. Special laser welding equipment includes sensor welding machine, silicon steel sheet laser welding equipment, keyboard laser welding equipment.

[0003] Laser welding uses high-energy laser pulses to locally heat the material in a tiny area. The energy of the laser radiation diffuses into the interior of the material through heat conduction, melting the material to form a specific molten pool. It is a new type of welding method, mainly for the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, stack welding, sealing welding, etc. It has a high aspect ratio, small weld width, small heat-affected zone, small deformation, fast welding speed, smooth and beautiful weld, no post-welding treatment or only simple treatment, high weld quality, no pores, can be precisely controlled, small focused light spot, high positioning accuracy, and easy automation.

[0004] In the traditional process of welding workpieces, the workpiece needs to be translated on the operating platform. The workpiece is moved to the welding position before welding. The positioning accuracy of the workpiece is low, and welding deviation occurs, resulting in poor product quality. When positioning the workpiece, mobile positioning is adopted, and friction is generated between the workpiece and the operating platform, which can easily scratch the surface of the workpiece and make the workpiece defective. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a bearing-based sliding positioning welding device to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a bearing-based sliding positioning welding device, comprising an operating platform and a supporting body, a sliding connector is provided at the top of the supporting body, a knob is provided on one side of the supporting body, a positioning needle seat is provided inside the top of the sliding connector, an end stopper is provided on the other side of the supporting body, a positioning bolt is provided in the middle of the end stopper, a rotating nut is provided on one side of the supporting body, and a stabilizing spring is provided inside the supporting body; A connecting body is provided at the top of the supporting body, a sliding hole is provided at the top of the connecting body, a sliding groove is provided inside the supporting body, the sliding hole and the sliding groove are interconnected, a first fixing hole is provided on one side of the supporting body, a blocking hole is provided on the inner wall of the supporting body close to the first fixing hole, a first main moving hole is provided on the side of the supporting body away from the first fixing hole, first auxiliary moving holes are provided on both sides of the first main moving hole, and the first auxiliary moving hole is provided on the supporting body.

[0007] Furthermore, the first fixed hole is connected to the baffle hole, the baffle hole is opened in the shell wall of the supporting body, the sliding hole and the sliding groove are connected to form a convex shape, the first auxiliary shift hole is two left and right sides of the first main shift hole, the first auxiliary shift holes are mirrored to each other through the center of the first main shift hole, the rotating nut is fixed in the first main shift hole, the stabilizing springs are divided into two groups, each group has 4 and are mirrored to each other in pairs, arranged in a rectangular style, and the two groups of stabilizing springs are mirrored to each other through the center line of the supporting body.

[0008] In a preferred embodiment, a sliding support body is provided at the bottom end of the sliding connection body, the sliding connection body is arranged in the sliding hole, the sliding support body is arranged in the sliding groove, a fine-tuning hole is opened at the top of the sliding connection body, a second main shift hole is provided in the middle of the sliding support body, second auxiliary shift holes are provided on both sides of the second main shift hole, the second auxiliary shift holes are opened on the sliding support body, and the second auxiliary shift holes are mirrored to each other through the center of the second main shift hole.

[0009] Furthermore, the fine-tuning hole is in the sliding hole and has no contact on all four sides. The sliding support body is in the sliding groove, and the bottom end is in contact with the sliding groove and slides on the surface of the sliding groove. The second main shift hole and the first main shift hole have the same axis, and the second auxiliary shift hole and the first auxiliary shift hole have the same axis. The second main shift hole passes through the sliding support body, and the top of the sliding connecting body and the top of the connecting body are in the same plane. The upper and lower ends of both sides of the sliding support body are fixedly connected with stabilizing springs, and the other end of the stabilizing spring is fixed on the sliding groove.

[0010] In a preferred embodiment, a screw is provided inside the rotating nut, one end of the screw is fixedly connected to a knob, a rotating bearing is provided on the outer wall of the screw, a rotating slot is provided on the inner wall of the fixed ring, the outer wall of the rotating bearing is arranged in the rotating slot, connecting rods are provided at both ends of the fixed ring, a sleeve is provided at the end of the connecting rod away from the fixed ring, an optical axis is provided inside the sleeve, a linear bearing is movably connected on the outer wall of the optical axis, the optical axis is arranged in a first auxiliary shift hole, the screw is arranged in a first main shift hole, the linear bearing is arranged in a second auxiliary shift hole, the screw is arranged in the second main shift hole, and a limiting hole is provided at the end of the screw away from the knob.

[0011] Furthermore, the screw rod is respectively connected to the rotating nut, the first main shift hole and the second main shift hole, and the rotation of the screw rod drives the second main shift hole to move, so that the sliding support body and the sliding connecting body move in the sliding groove and the sliding hole. The sliding support body is supported by the stabilizing spring, so that the sliding support body is more stable when it is displaced, and the sliding effect is better. When the screw rod rotates, the rotating nut is fixed in the first main shift hole and will not rotate. The rotation of the screw rod does not affect the first main shift hole. The part of the rotating nut inserted into the first main shift hole is flush with the outer wall of the sliding groove, the linear bearing is fixed on the inner wall of the second auxiliary shift hole and both ends are flush with the end face of the sliding support body, and the outer wall of the optical axis is movably connected to the inner wall of the linear bearing, so that the sliding support body and the sliding connecting body are smoother when sliding, the effect of moving back and forth is better, and the positioning is more precise.

[0012] In a preferred embodiment, a positioning needle seat is provided inside the fine-tuning hole, a threaded hole is provided on one side of the top of the positioning needle seat, a fixing needle hole is provided on the other side of the top of the positioning needle seat, a fine-tuning column is provided at one end of the positioning needle seat, a fixing screw is provided inside the threaded hole, a positioning needle is provided inside the fixing needle hole, and a miniature bearing is sleeved on the outer wall of the fine-tuning column.

[0013] Furthermore, the outer wall of the positioning needle seat is at a distance from the inner wall of the fine-tuning hole. When the micro-bearing rotates, the fine-tuning column will be driven to produce a telescopic effect, thereby causing the positioning needle seat to be displaced and the positioning to be fine-tuned. The telescopic effect of the fine-tuning column is a prior art and is therefore not drawn in detail. When fine-tuning the positioning needle seat, first loosen the fixing screw, and then rotate the micro-bearing to cause the fine-tuning column to telescope, thereby driving the positioning needle seat to be fine-tuned. The micro-bearing is 2-3 mm higher than the top of the connecting body, and the positioning needle is a support point for the welding workpiece, so that the positioning effect of the device is better, more precise, and more stable.

[0014] In a preferred embodiment, a second fixing hole is opened in the middle of the end baffle, and a positioning bolt is threadedly connected to the second fixing hole. The outer wall of the positioning bolt is arranged in the first fixing hole, the bottom end of the positioning bolt is arranged in the limiting hole, and the end baffle is arranged in the baffle hole.

[0015] Furthermore, the positioning bolt, the second fixing hole, the second main shift hole, the first main shift hole and the screw rod are on the same axis, and the two ends of the end baffle block one end of the optical axis, so that the device is smoother during the sliding process, the positioning effect of the workpiece is better, the stability is higher, and the device positioning is more precise. The positioning bolt is arranged in the limit hole to fix the screw rod, so that the subsequent device positioning effect is better and the positioning is more precise and stable.

[0016] Technical effects and advantages of the present invention: The present invention fixes the sliding welding positioning device on the operating platform, and realizes the precise positioning of the workpiece during the sliding welding process by adjusting the sliding positioning device. Compared with the traditional welding process in which the workpiece rubs hard against the operating platform during movement, the present invention uses a bearing vertical installation method to enable the workpiece to smoothly pass through the action point of the laser energy to achieve precise positioning welding. It is not only not easy to scratch the surface of the workpiece, but also simple to operate and has higher work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure explosion of the present invention.

[0019] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the sliding support body of the present invention.

[0021] Figure 5 It is a schematic diagram of the overall structure of the silk of the present invention.

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of the screw rod of the present invention.

[0023] Figure 7 For the present invention Figure 2 Enlarged structural diagram at A in the middle.

[0024] Figure 8 For the present invention Figure 6 Enlarged structural diagram at B in the middle.

[0025] The accompanying drawings are marked as follows: 1. supporting body; 11. connecting body; 12. sliding hole; 13. first fixing hole; 14. sliding groove; 15. baffle hole; 16. first main shift hole; 17. first auxiliary shift hole; 2. sliding connecting body; 21. sliding supporting body; 22. fine-tuning hole; 23. second main shift hole; 24. second auxiliary shift hole; 3. knob; 31. screw rod; 32. fixing ring; 321. rotating slot; 322. rotating bearing; 33. connecting rod; 34. sleeve; 35. optical axis; 36. linear bearing; 37. limiting hole; 4. positioning needle seat; 41. threaded hole; 42. fixing needle hole; 43. fixing screw; 44. positioning needle; 45. fine-tuning column; 46. miniature bearing; 5. end baffle; 51. second fixing hole; 6. positioning bolt; 7. rotating nut; 8. stabilizing spring. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The bearing-based sliding positioning welding device involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0027] Reference Figure 1 and Figure 2 The present invention provides a bearing-based sliding positioning welding device, comprising an operating platform and a supporting body 1, a sliding connection body 2 is provided at the top of the supporting body 1, a knob 3 is provided on one side of the supporting body 1, a positioning needle seat 4 is provided inside the top of the sliding connection body 2, an end stopper 5 is provided on the other side of the supporting body 1, a positioning bolt 6 is provided in the middle of the end stopper 5, a rotating nut 7 is provided on one side of the supporting body 1, and a stabilizing spring 8 is provided inside the supporting body 1; A connecting body 11 is provided at the top of the supporting body 1, a sliding hole 12 is provided at the top of the connecting body 11, a sliding groove 14 is provided inside the supporting body 1, the sliding hole 12 and the sliding groove 14 are interconnected, a first fixing hole 13 is provided on one side of the supporting body 1, a blocking hole 15 is provided on the inner wall of the side of the supporting body 1 close to the first fixing hole 13, a first main moving hole 16 is provided on the side of the supporting body 1 away from the first fixing hole 13, first auxiliary moving holes 17 are provided on both sides of the first main moving hole 16, and the first auxiliary moving hole 17 is provided on the supporting body 1.

[0028] What needs to be specifically explained in this embodiment is: the first fixing hole 13 is connected with the baffle hole 15, the baffle hole 15 is opened in the shell wall of the supporting body 1, the sliding hole 12 is connected with the sliding groove 14 to form a convex shape, the first auxiliary shifting holes 17 are two and are respectively located on the left and right sides of the first main shifting hole 16, the first auxiliary shifting holes 17 are mirrored to each other through the center of the first main shifting hole 16, the rotating nut 7 is fixed in the first main shifting hole 16, the stabilizing springs 8 are divided into two groups, each group has 4 and are mirrored to each other in pairs, and are arranged in a rectangular style, and the two groups of stabilizing springs 8 are mirrored to each other through the center line of the supporting body 1.

[0029] Reference Figure 1-4 A sliding support body 21 is provided at the bottom end of the sliding connection body 2, the sliding connection body 2 is arranged in the sliding hole 12, the sliding support body 21 is arranged in the sliding groove 14, a fine-tuning hole 22 is opened at the top of the sliding connection body 2, a second main shift hole 23 is provided in the middle of the sliding support body 21, and second auxiliary shift holes 24 are provided on both sides of the second main shift hole 23. The second auxiliary shift holes 24 are opened on the sliding support body 21, and the second auxiliary shift holes 24 are mirrored to each other through the center of the second main shift hole 23.

[0030] What needs to be specifically explained in this embodiment is: the fine-tuning hole 22 is inside the sliding hole 12 and has no contact on all four sides, the sliding support body 21 is inside the sliding groove 14, the bottom end is in contact with the sliding groove 14, and slides on the surface of the sliding groove 14, the second main shift hole 23 and the first main shift hole 16 are on the same axis, the second auxiliary shift hole 24 and the first auxiliary shift hole 17 are on the same axis, the second main shift hole 23 passes through the sliding support body 21, the top of the sliding connecting body 2 is flush with the top of the connecting body 11, and the upper and lower ends on both sides of the sliding support body 21 are fixedly connected with a stabilizing spring 8, and the other end of the stabilizing spring 8 is fixed on the sliding groove 14.

[0031] Reference Figure 1-8 A screw rod 31 is provided inside the rotating nut 7, one end of the screw rod 31 is fixedly connected to the knob 3, a rotating bearing 322 is provided on the outer wall of the screw rod 31, a rotating groove 321 is provided on the inner wall of the fixed ring 32, the outer wall of the rotating bearing 322 is arranged in the rotating groove 321, connecting rods 33 are provided at both ends of the fixed ring 32, a sleeve 34 is provided at the end of the connecting rod 33 away from the fixed ring 32, an optical axis 35 is provided inside the sleeve 34, a linear bearing 36 is movably connected on the outer wall of the optical axis 35, the optical axis 35 is arranged in the first auxiliary shift hole 17, the screw rod 31 is arranged in the first main shift hole 16, the linear bearing 36 is arranged in the second auxiliary shift hole 24, the screw rod 31 is arranged in the second main shift hole 23, and a limiting hole 37 is provided at the end of the screw rod 31 away from the knob 3.

[0032] The screw rod 31 is connected to the rotating nut 7, the first main shift hole 16 and the second main shift hole 23 respectively, and the second main shift hole 23 is driven to move by the rotation of the screw rod 31, so that the sliding support body 21 and the sliding connection body 2 move in the sliding groove 14 and the sliding hole 12. The support of the sliding support body 21 by the stabilizing spring 8 makes the sliding support body 21 more stable and has a better sliding effect when it is displaced. When the screw rod 31 rotates, the rotating nut 7 is fixed in the first main shift hole 16 and will not rotate. The rotation of the screw rod 31 does not affect the first main shift hole 16. The part of the rotating nut 7 inserted into the first main shift hole 16 is flush with the outer wall of the sliding groove 14. The linear bearing 36 is fixed on the inner wall of the second auxiliary shift hole 24 and its two ends are flush with the end face of the sliding support body 21. The outer wall of the optical axis 35 is movably connected to the inner wall of the linear bearing 36, so that the sliding support body 21 and the sliding connection body 2 are smoother when sliding, the effect of moving back and forth is better, and the positioning is more accurate.

[0033] Reference Figure 2-3A positioning needle seat 4 is provided inside the fine-tuning hole 22, a threaded hole 41 is provided on one side of the top of the positioning needle seat 4, a fixing needle hole 42 is provided on the other side of the top of the positioning needle seat 4, a fine-tuning column 45 is provided at one end of the positioning needle seat 4, a fixing screw 43 is provided inside the threaded hole 41, a positioning needle 44 is provided inside the fixing needle hole 42, and a miniature bearing 46 is sleeved on the outer wall of the fine-tuning column 45.

[0034] What needs to be specifically explained in this embodiment is that: the outer wall of the positioning needle seat 4 is at a distance from the inner wall of the fine-tuning hole 22. When the micro-bearing 46 rotates, it will drive the fine-tuning column 45 to produce a telescopic effect, so that the positioning needle seat 4 produces a certain displacement, and the positioning is fine-tuned. The telescopic effect of the fine-tuning column 45 is a prior art, so it is not drawn in detail. When fine-tuning the positioning needle seat 4, first loosen the fixing screw 43, and then rotate the micro-bearing 46 to make the fine-tuning column 45 telescope, driving the positioning needle seat 4 to be fine-tuned. The micro-bearing 46 is 2-3mm higher than the top of the connecting body 11. The positioning needle 44 is a support point for the welding workpiece, so that the positioning effect of the device is better, more precise and stable.

[0035] Reference Figure 2-5 A second fixing hole 51 is opened in the middle of the end baffle 5, and a positioning bolt 6 is threadedly connected to the second fixing hole 51. The outer wall of the positioning bolt 6 is arranged in the first fixing hole 13, the bottom end of the positioning bolt 6 is arranged in the limiting hole 37, and the end baffle 5 is arranged in the baffle hole 15.

[0036] What needs to be specifically explained in this embodiment is that: the positioning bolt 6, the second fixing hole 51 and the second main shift hole 23, the first main shift hole 16 and the screw rod 31 are on the same axis, and the two ends of the end baffle 5 block one end of the optical axis 35, so that the device can slide more smoothly, the positioning effect of the workpiece is better, the stability is higher, and the device positioning is more accurate. The positioning bolt 6 is arranged in the limiting hole 37 to fix the screw rod 31, so that the subsequent device positioning effect is better and the positioning is more accurate and stable.

[0037] The working principle of the present invention is as follows: when the device is in use, the connecting body 11 is fixed at the welding position of the operating platform. After the position to be welded is determined, the screw rod 31 is driven to move forward and backward by rotating the knob 3. When the screw rod 31 rotates, the rotating bearing 322 is driven to rotate. When the rotating bearing 322 rotates, the fixed collar 32 will not be driven to rotate. The fixed collar 32 is fixed and stationary. Therefore, when the screw rod 31 moves, the optical axis 35 is driven to move. When the screw rod 31 and the optical axis 35 move, the sliding support body 21 is driven to move. When the sliding support body 21 moves, the sliding connection body 2 is driven to move. When the sliding support body 21 moves, the stabilizing spring 8 is squeezed and stretched, so that the sliding support body 21 slides. When moving, there will be no tilt or displacement caused by the sliding of the screw rod 31, so that the movement effect of the device is better and the positioning is more precise. After the positioning is completed, the first fixing hole 13 is installed on the limit hole 37 through the second fixing hole 51, and the optical axis 35 is blocked and fixed by the two ends of the end baffle 5, so that the positioning of the device is more precise and stable, and then the positioning needle seat 4 is fine-tuned by rotating the micro-bearing 46 to make the positioning of the positioning needle 44 more precise and stable. The position of the positioning needle 44 is the landing point for the welding workpiece to stop. The vertical installation of the bearing enables the workpiece to smoothly pass through the action point of the laser energy to achieve precise positioning welding. It is not easy to scratch the surface of the workpiece, and the operation is simple and the work efficiency is higher.

[0038] Finally: The above description is only a preferred embodiment of the present invention and is 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 in the protection scope of the present invention.

Claims

1. A bearing-based sliding positioning welding device, comprising an operating platform and a supporting body (1), characterized in that: A sliding connection body (2) is provided at the top end of the support body (1), a knob (3) is provided on one side of the support body (1), a positioning needle seat (4) is provided inside the top end of the sliding connection body (2), an end stopper (5) is provided on the other side of the support body (1), a positioning bolt (6) is provided in the middle of the end stopper (5), a rotating nut (7) is provided on one side of the support body (1), and a stabilizing spring (8) is provided inside the support body (1); A connecting body (11) is provided at the top of the supporting body (1), a sliding hole (12) is provided at the top of the connecting body (11), a sliding groove (14) is provided inside the supporting body (1), the sliding hole (12) and the sliding groove (14) are interconnected, a first fixing hole (13) is provided on one side of the supporting body (1), a blocking hole (15) is provided on the inner wall of a side of the supporting body (1) close to the first fixing hole (13), a first main moving hole (16) is provided on a side of the supporting body (1) away from the first fixing hole (13), first auxiliary moving holes (17) are provided on both sides of the first main moving hole (16), and the first auxiliary moving hole (17) is provided on the supporting body (1).

2. A bearing-based sliding positioning welding device according to claim 1, characterized in that: A sliding support body (21) is provided at the bottom end of the sliding connection body (2), the sliding connection body (2) is arranged in the sliding hole (12), the sliding support body (21) is arranged in the sliding groove (14), a fine adjustment hole (22) is provided at the top end of the sliding connection body (2), a second main shift hole (23) is provided in the middle of the sliding support body (21), second auxiliary shift holes (24) are provided on both sides of the second main shift hole (23), the second auxiliary shift holes (24) are provided on the sliding support body (21), and the second auxiliary shift holes (24) are arranged in a mirror image with respect to each other through the center of the second main shift hole (23).

3. A bearing-based sliding positioning welding device according to claim 2, characterized in that: A screw rod (31) is provided inside the rotating nut (7), one end of the screw rod (31) is fixedly connected to a knob (3), a fixed ring (32) is provided on the outer wall of the knob (3), a rotating bearing (322) is provided on the outer wall of the screw rod (31), a rotating groove (321) is provided on the inner wall of the fixed ring (32), the outer wall of the rotating bearing (322) is arranged in the rotating groove (321), and connecting rods (33) are provided at both ends of the fixed ring (32), the connecting rods (33) are away from the fixed ring. A sleeve (34) is provided at one end of the ring (32), an optical axis (35) is provided inside the sleeve (34), a linear bearing (36) is movably connected to the outer wall of the optical axis (35), the optical axis (35) is arranged in the first auxiliary shift hole (17), the screw rod (31) is arranged in the first main shift hole (16), the linear bearing (36) is arranged in the second auxiliary shift hole (24), the screw rod (31) is arranged in the second main shift hole (23), and a limiting hole (37) is provided at one end of the screw rod (31) away from the knob (3).

4. A bearing-based sliding positioning welding device according to claim 2, characterized in that: A positioning needle seat (4) is provided inside the fine-tuning hole (22), a threaded hole (41) is provided on one side of the top of the positioning needle seat (4), a positioning needle hole (42) is provided on the other side of the top of the positioning needle seat (4), a fine-tuning column (45) is provided at one end of the positioning needle seat (4), a fixing screw (43) is provided inside the threaded hole (41), a positioning needle (44) is provided inside the positioning needle hole (42), and a micro bearing (46) is sleeved on the outer wall of the fine-tuning column (45).

5. A bearing-based sliding positioning welding device according to claim 3, characterized in that: A second fixing hole (51) is formed in the middle of the end baffle (5), a positioning bolt (6) is threadedly connected to the second fixing hole (51), an outer wall of the positioning bolt (6) is arranged in the first fixing hole (13), a bottom end of the positioning bolt (6) is arranged in the limiting hole (37), and the end baffle (5) is arranged in the baffle hole (15).

6. A bearing-based sliding positioning welding device according to claim 5, characterized in that: The positioning bolt (6), the second fixing hole (51), the second main shift hole (23), the first main shift hole (16) and the screw rod (31) are coaxial, and the two ends of the end stopper (5) block one end of the optical axis (35).

7. A bearing-based sliding positioning welding device according to claim 4, characterized in that: The outer wall of the positioning needle seat (4) is 2-3 mm away from the inner wall of the fine-tuning hole (22), and the micro bearing (46) is 2-3 mm higher than the top of the connecting body (11).

8. A bearing-based sliding positioning welding device according to claim 3, characterized in that: The screw rod (31) is respectively connected to the rotating nut (7), the first main shift hole (16) and the second main shift hole (23); the portion of the rotating nut (7) inserted into the first main shift hole (16) is flush with the outer wall of the sliding groove (14); the linear bearing (36) is fixed on the inner wall of the second auxiliary shift hole (24) and both ends are flush with the end surface of the sliding support body (21).

9. A bearing-based sliding positioning welding device according to claim 1, characterized in that: The first fixing hole (13) and the baffle hole (15) are in a connected shape. The baffle hole (15) is formed in the shell wall of the supporting body (1). The sliding hole (12) and the sliding groove (14) are in a connected shape to form a convex shape. The first auxiliary shifting holes (17) are two holes located on the left and right sides of the first main shifting hole (16), respectively. The first auxiliary shifting holes (17) are arranged in a mirror image with each other through the center of the first main shifting hole (16).

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