Welding tool for machining automobile door panel

Abstract

The invention relates to the technical field of automobile door panel welding, and discloses a welding tool for automobile door panel machining, which comprises a welding table, and further comprises a bracket fixedly connected to the bottom of the welding table and used for supporting the welding table. The supporting face matched with the curved face of the back of the door plank is formed through the supporting mechanism capable of being independently adjusted, the pressing column capable of independently acting in the clamping mechanism is combined, all-directional, deformation-free and self-adaptive clamping of the door plank with the complex three-dimensional modeling is achieved, a stable reference is provided for high-precision welding, and the welding quality is improved. The core attaching mechanism always rolls close to the surface of the door plate under the action of a spring I and a spring II of a spring system through a roller, so that a welding gun can dynamically track the change of a curved surface contour in real time, the optimal welding distance is automatically maintained, and a laser beam is always perpendicular to a welding seam in combination with a shifting assembly with a fine-adjustable angle; welding defects caused by distance and angle deviation are fundamentally overcome, and welding quality and consistency are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile door panel welding, in particular to a welding tool for automobile door panel processing. BACKGROUND

[0002] The automobile door panel is an important part of the automobile interior, which is usually composed of metal skeleton, plastic panel, decorative parts and other material components. The connection of these components requires high-precision and high-efficiency welding process. Laser welding, as a modern welding technology with high energy density and high precision, has been increasingly widely used in automobile door panel processing due to its small heat-affected zone, small deformation and fast welding speed.

[0003] However, in actual production, when applying laser welding technology to large and complex three-dimensional curved workpieces such as automobile door panels, there are still many challenges. First, the door panel components are large in size and poor in rigidity, and the back often has complex reinforcing ribs and concave-convex structures. The traditional fixed clamps are difficult to achieve overall and stable support, and under the combined action of clamping force and welding thermal stress, the workpiece is prone to deformation, affecting the welding precision and even causing product scrap. Second, the surface of the door panel is not flat, but has complex curvature, which makes it difficult to maintain the optimal distance between the laser welding gun and the weld during the welding process. If the distance is too far, it will result in insufficient energy density and form a virtual weld. If the distance is too close, there is a risk of collision. Therefore, a welding tool for automobile door panel processing is proposed to solve the above problems. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a welding tool for automobile door panel processing to overcome the shortcomings of the prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present application is as follows: a welding tool for automobile door panel processing, comprising a welding table, further comprising: a support fixedly connected to the bottom of the welding table for supporting the welding table; a plurality of support mechanisms arranged above the support for supporting the door panel assembly; a clamping mechanism arranged on the welding table for clamping the door panel assembly; a moving mechanism arranged on the welding table for moving the laser welding gun installed on the moving mechanism for welding the door panel assembly; a fitting mechanism arranged on the moving mechanism for fitting on the outer side of the door panel assembly; The moving mechanism comprises: a plurality of rectangular holes respectively arranged on the top of the welding table, one rectangular hole is arranged on the left and right sides, and two rectangular holes are arranged on the front and rear sides; The inner wall of each rectangular hole is fixedly connected with two sliding rods, and the outer wall of the sliding rod is slidably connected with a sliding block; The top of the outermost sliding block is fixedly connected with a fixed column, and the front and rear fixed columns and the left and right fixed columns are fixedly connected with sliding columns; The outer wall of the two sliding columns is slidably connected with a moving block.

[0006] Preferably, each of the support mechanisms comprises: A support column movably penetrates the welding table and extends upward to support the door plate assembly; A threaded groove is formed in the outer wall of the support column, and a threaded sleeve is threadedly connected to the outer wall of the threaded groove to adjust the height of the support column; A tension spring I is sleeved on the outer wall of the support column, and the two ends of the tension spring I are respectively connected with the bottom of the welding table and the threaded sleeve.

[0007] Preferably, the moving mechanism further comprises: Two rodless cylinders are fixedly connected to the outer wall of the welding table and are respectively connected with two sliding blocks on the welding table in the transverse and longitudinal directions to drive the sliding blocks to move on the outer wall of the sliding rod.

[0008] Preferably, the clamping mechanism comprises: Two fixed rods are respectively fixedly connected to the top of the two sliding blocks on the inner side of the front and rear; Two sliding sleeves are respectively sleeved on the outer wall of the two fixed rods, and a tension spring II is sleeved on the outer wall of the fixed rod to pull the sliding sleeve downward; A pressing rod is fixedly connected to the outer wall of the two sliding sleeves and abuts against the door plate assembly to fix the door plate assembly; A pressing column movably penetrates the middle part of the pressing rod, and a tension spring III is sleeved on the outer wall of the pressing column to pull the pressing column downward to abut against the recess of the door plate assembly.

[0009] Preferably, the abutting mechanism comprises: A cylinder is rotatably connected to the bottom of the moving block to drive the laser welding gun to approach the door plate assembly; An activity rod is movably inserted into the output end of the cylinder, and a spring I is sleeved on the outer wall of the activity rod to push the activity rod downward; A sliding shaft movably penetrates one end of the activity rod away from the cylinder, and two rollers are rotatably connected to the outer wall of the sliding shaft at both ends; Two spring II are sleeved on the outer wall of the sliding shaft and located on both sides of the activity rod to push one end of the sliding shaft to abut against the side wall of the door plate assembly.

[0010] Preferably, the outer wall of the cylinder is provided with a poking assembly to change the angle of the laser welding gun, and the poking assembly comprises: Connecting rod, fixedly connected to the outer wall of the cylinder output end; Adjusting rod, fixedly connected to the outer wall of the cylinder and located above the connecting rod, and corresponding through holes are formed in the connecting rod and the adjusting rod; Swing rod, rotatably connected to the through hole of the connecting rod through a pin shaft, and the swing rod is located in the through hole of the adjusting rod and swings; The laser welding gun is mounted at the bottom of the swing rod.

[0011] Preferably, the adjusting assembly further comprises: Push rod, movably connected in the sliding hole of the adjusting rod and abutting against the outer wall of the swing rod; Spring three, arranged in the sliding hole and pushing the push rod to abut against the outer wall of the swing rod; Adjusting nut, threadedly connected to the adjusting rod and threadedly penetrating into the through hole, and one end of the adjusting nut is spherically arranged and abuts against the outer wall of the swing rod.

[0012] Preferably, one end of the connecting rod is hingedly connected with a negative pressure fan for sucking the welding generated smoke; The negative pressure fan is connected with a conduit, and the laser welding gun is connected with a wire; The outer wall of the slide column of the front and rear two sliding blocks is sleeved with a plurality of movable rings, the outer wall of the wire and the conduit is sleeved with a protective sleeve, and the outer wall of the wire and the conduit is arranged in the annular ring at the bottom of the movable ring, a pull spring four is connected between each movable ring and the moving block, and the pull spring four is used for pulling the movable ring to move.

[0013] The above technical scheme can bring the following beneficial effects: 1. The welding tool for automobile door panel machining, through the independently adjustable supporting mechanism, a supporting surface that matches the back surface of the door panel is formed, combined with the single-acting pressing column in the clamping mechanism, the door panel with a complex three-dimensional shape is clamped in all directions without deformation and self-adaptation, a stable reference for high-precision welding is provided, and the core matching mechanism is always in close contact with the surface of the door panel and rolls under the action of the spring system spring one and spring two, so that the welding gun can dynamically track the change of the curved surface profile in real time, the optimal welding distance is automatically maintained, combined with the angle-adjustable adjusting assembly, the laser beam is always perpendicular to the weld, the welding defects caused by distance and angle deviation are fundamentally solved, and the welding quality and consistency are significantly improved.

[0014] 2. The welding tool for automobile door panel machining, through the clamping mechanism, the clamping force is provided by the pull spring two and the pull spring three, and the clamping force is not rigidly driven. This "flexible" clamping method can effectively fix the door panel and prevent it from moving or warping during welding, and can also avoid damaging the surface of the door panel, especially the plastic interior part, due to excessive or concentrated clamping force, and perfectly adapts to the characteristics of soft material and delicate shape of the automobile door panel.

[0015] 3. The welding tool for automobile door panel processing integrates a negative pressure fan smoke treatment system, can timely absorb harmful smoke at a welding source, guarantees the health of operating personnel, improves the working environment, and simultaneously can orderly pull and store welding gun wires and dust suction pipes through the movable ring and the four tension springs, is synchronously retracted and extended with the movement of the welding gun, effectively prevents cable entanglement, dragging and wear, and guarantees the reliability and safety of long-term operation of the equipment.

[0016] 4. The welding tool for automobile door panel processing can quickly adapt to door panel products of different vehicle models and different shapes through the height of the support column, has high universality, and is convenient to adjust during production change. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the present application; Figure 2 It is a back structure schematic view of the present application; Figure 3 It is a front structure schematic view of the present application; Figure 4 It is a moving mechanism structure schematic view of the present application; Figure 5 It is a moving mechanism explosion structure schematic view of the present application; Figure 6 It is a clamping mechanism structure schematic view of the present application; Figure 7 It is a fitting mechanism structure schematic view of the present application; Figure 8 It is a fitting mechanism cross section structure schematic view of the present application; Figure 9 It is a Figure 8 enlarged structure schematic view of A in the present application.

[0018] In the figure: 1, welding table; 2, support; 3, support mechanism; 31, support column; 32, tension spring one; 33, threaded sleeve; 4, clamping mechanism; 41, fixed rod; 42, sliding sleeve; 43, tension spring two; 44, pressing rod; 45, pressing column; 46, tension spring three; 5, moving mechanism; 51, sliding rod; 52, sliding block; 53, fixed column; 54, sliding column; 55, moving block; 56, rodless cylinder; 6, fitting mechanism; 61, cylinder; 62, movable rod; 63, spring one; 64, sliding shaft; 65, roller; 66, spring two; 67, actuating assembly; 671, connecting rod; 672, swing rod; 673, adjusting rod; 674, spring three; 675, push rod; 676, adjusting nut; 677, negative pressure fan; 678, guide pipe; 679, movable ring; 6710, tension spring four; 7, door panel assembly; 8, laser welding gun. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Please refer to Figures 1-9 An embodiment of the present application is a welding tool for automobile door panel processing, comprising a welding table 1, further comprising: a support 2 fixedly connected to the bottom of the welding table 1, used for supporting the welding table 1; a plurality of support mechanisms 3 arranged above the support 2, used for supporting the door panel assembly 7; a clamping mechanism 4 arranged on the welding table 1, used for clamping the door panel assembly 7; a moving mechanism 5 arranged on the welding table 1, used for moving the laser welding gun 8 installed on the moving mechanism 5, and used for welding the door panel assembly 7; a fitting mechanism 6 arranged on the moving mechanism 5, used for fitting on the outer side of the door panel assembly 7; The moving mechanism 5 comprises: a plurality of rectangular holes respectively arranged on the top of the welding table 1, one rectangular hole arranged on the left and right sides, and two rectangular holes arranged on the front and back sides; two sliding rods 51 fixedly connected to the inner wall of each rectangular hole, and a sliding block 52 slidingly connected to the outer wall of the sliding rod 51; a fixed column 53 fixedly connected to the top of the outermost sliding block 52, and a sliding column 54 fixedly connected between the front and back two fixed columns 53 and the left and right two fixed columns 53; two moving blocks 55 respectively slidingly connected to the outer walls of the two sliding columns 54.

[0021] Each support mechanism 3 comprises: a support column 31 movably penetrating through the welding table 1 and extending upward, used for supporting the door panel assembly 7; a threaded groove arranged on the outer wall of the support column 31, and a threaded sleeve 33 threadedly connected to the outer wall of the threaded groove, used for adjusting the height of the support column 31; a tension spring I 32 sleeved on the outer wall of the support column 31, and the two ends of the tension spring I 32 respectively connected to the bottom of the welding table 1 and the threaded sleeve 33.

[0022] The moving mechanism 5 further comprises: Two leverless cylinders 56 are fixedly connected to the outer wall of the welding table 1 respectively and connected with the two sliding blocks 52 on the welding table 1 transversely and longitudinally respectively, for driving the sliding blocks 52 to move on the outer wall of the slide rod 51.

[0023] The clamping mechanism 4 comprises: Two fixed rods 41 are fixedly connected to the top of the two sliding blocks 52 on the inner side respectively; Two sliding sleeves 42 are sleeved on the outer wall of the two fixed rods 41 respectively, and the outer wall of the fixed rod 41 is sleeved with a tension spring 43 for pulling the sliding sleeve 42 to move downward; A pressing rod 44 is fixedly connected to the outer wall of the two sliding sleeves 42 and abuts against the door plate assembly 7, for fixing the door plate assembly 7; A pressing column 45 is movably penetrated through the middle part of the pressing rod 44, and the outer wall of the pressing column 45 is sleeved with a tension spring 46 for pulling the pressing column 45 to move downward and abutting against the recess of the door plate assembly 7.

[0024] The abutting mechanism 6 comprises: A cylinder 61 is rotatably connected to the bottom of the moving block 55, for driving the laser welding gun 8 to approach the door plate assembly 7; An active rod 62 is movably inserted into the output end of the cylinder 61, and the outer wall of the active rod 62 is sleeved with a spring 63 for pushing the active rod 62 to move downward; A slide shaft 64 is movably penetrated through one end of the active rod 62 away from the cylinder 61, and the outer wall of the slide shaft 64 is rotatably connected with two rollers 65 at both ends respectively; Two springs 66 are sleeved on the outer wall of the slide shaft 64 and located on both sides of the active rod 62, for pushing one end of the slide shaft 64 to abut against the side wall of the door plate assembly 7.

[0025] The outer wall of the cylinder 61 is provided with a rotating assembly 67 for rotating the angle of the laser welding gun 8, and the rotating assembly 67 comprises: A connecting rod 671 is fixedly connected to the outer wall of the output end of the cylinder 61; An adjusting rod 673 is fixedly connected to the outer wall of the cylinder 61 and located above the connecting rod 671, and corresponding through holes are formed in the connecting rod 671 and the adjusting rod 673 respectively; A swing rod 672 is rotatably connected in the through hole of the connecting rod 671 by a pin shaft, and the swing rod 672 swings in the through hole of the adjusting rod 673; The laser welding gun 8 is installed at the bottom of the swing rod 672.

[0026] The rotating assembly 67 further comprises: A push rod 675 is movably connected in the sliding hole of the adjusting rod 673 and abuts against the outer wall of the swing rod 672; A spring three 674 is arranged in the sliding hole and pushes the push rod 675 against the outer wall of the swing rod 672; An adjusting nut 676 is threadedly connected to the adjusting rod 673 and threadedly penetrates into the through hole, and one end of the adjusting nut 676 is provided in a spherical shape and abuts against the outer wall of the swing rod 672.

[0027] One end of the connecting rod 671 is hingedly connected with a negative pressure fan 677 for sucking the welding generated smoke; The negative pressure fan 677 is connected with a conduit 678, and the laser welding gun 8 is connected with a wire; The outer wall of the slide post 54 on the front and rear sliding blocks 52 is sleeved with a plurality of movable rings 679, the outer wall of the wire and the conduit 678 is sleeved with a protective sleeve, and the movable rings 679 are arranged in the circular rings at the bottom of the movable rings 679, a pull spring four 6710 is connected between each movable ring 679 and the moving block 55, and the pull spring four 6710 is used for pulling the movable ring 679 to move.

[0028] Working principle: the door plate assembly 7 to be welded is placed on the top of the plurality of supporting mechanisms 3, the door plate assembly 7 includes a door plate interior plastic part, is overlapped and combined, and is placed on the supporting column 31, at this time, the height of the supporting column 31 can be accurately adjusted by rotating the threaded sleeve 33, the pull spring one 32 provides upward pre-tightening force, and the supporting column is ensured to be stably arranged at the set height, then the height of each supporting point is adjusted, the supporting surface can be perfectly abutted against the complex curved surface at the back of the door plate, a stable and non-deformation reference for welding is provided, then the sliding block 52 at the inner side is pulled to move, the fixed rod 41 and the sliding sleeve 42 thereon are driven to move to the position above the door plate to be pressed, under the action of the pull spring two 43, the sliding sleeve 42 drives the pressing rod 44 to move downward, and the door plate surface is gently pressed, for the recessed position on the door plate, the pressing column 45 can be individually extended downward under the action of the pull spring three 46, and is deeply extended into the recessed position to effectively press, and omnibearing self-adaptive clamping is realized, and the door plate is prevented from being displaced or deformed in the welding process; The moving mechanism 5 constitutes a precise planar motion system, the longitudinal and transverse rodless cylinders 56 respectively drive the corresponding sliding blocks 52 to move on the slide rods 51, so that the slide post 54 connected with all the sliding blocks 52 moves in the X-Y plane, the moving block 55 mounted on the slide post 54 can freely slide along the slide post, and by controlling the movement of the two rodless cylinders 56, the moving block 55, that is, the laser welding gun 8, can be accurately positioned at any position on the door plate plane, and complex welding path programming is realized; Subsequently through the fitting mechanism 6 ensure that the welding torch end always with the door plate weld keep the best distance and angle, first cylinder 61 drive laser welding torch 8 down close to the door plate assembly 7, when laser welding torch 8 approach door plate assembly 7, the two rollers 65 at the end of the movable rod 62 will first contact the door plate curved surface, at this time in the buffer effect of spring one 63, movable rod 62 can be relative to the cylinder 61 telescopic, avoid rigid collision, because the door plate exists arc, when the welding torch moves, one side of the roller 65 will be compressed by the lateral pressure and the spring two 66 on the side through the slide shaft 64, so that the roller 65 inside the laser welding torch 8 can be closely attached to the surface of the door plate assembly 7 roll, so that the laser welding torch 8 can real-time "follow" the contour of the door plate changes and moves welding; Further, the adjusting knob assembly 67 is used for fine adjustment of the irradiation angle of the laser welding torch 8, the ball head end of the rotating adjusting nut 676 pushes the swing rod 672 to rotate around the pin shaft by a small angle, so that the pitch angle of the laser welding torch 8 installed at the bottom of the swing rod is changed, the laser beam is perpendicular to the weld, and the best welding effect is obtained, and the spring three 674 pushes the push rod 675 to play the role of gap elimination and stabilization, when welding, the negative pressure fan 677 is started, negative pressure is generated near the welding torch through the conduit 678, harmful smoke generated during welding is effectively absorbed, the wire of the laser welding torch 8 and the conduit 678 of the negative pressure fan are received in the protective sleeve and fixed in the plurality of movable rings 679 on the slide column 54, when the moving block 55 moves, the movable rings 679 will orderly slide through the traction of the pull spring four 6710, so that the cable is prevented from being entangled, dragged or abraded, and stable operation of the equipment for a long time is ensured.

[0029] The present application provides a kind of welding tool for automobile door plate processing, the method and approach of many specific implementation this technical scheme, above-mentioned only it is preferred embodiment of the present application, it should be pointed out, for the ordinary skill in the art of this technical field, without departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be considered as the protection scope of the present application. The components not explicitly described in the embodiment can be realized by prior art.

Claims

1. A welding tool for processing of an automobile door panel, comprising a welding table (1), characterized in that, Also include: Support (2), fixedly connected to the bottom of the welding table (1), for supporting the welding table (1); A plurality of support mechanisms (3) are arranged above the support (2), for supporting the door plate assembly (7); Clamping mechanism (4) is arranged on the welding table (1), for clamping the door plate assembly (7); Moving mechanism (5) is arranged on the welding table (1), for moving the laser welding gun (8) installed on the moving mechanism (5), for welding the door plate assembly (7); The fitting mechanism (6) is arranged on the moving mechanism (5), for fitting on the outside of the door plate assembly (7) moving; Wherein, the moving mechanism (5) comprises: A plurality of rectangular holes are respectively arranged on the top of the welding table (1), and one rectangular hole is arranged on the left and right sides, and two rectangular holes are arranged on the front and back sides; The inner wall of each rectangular hole is fixedly connected with two sliding rods (51), and the outer wall of the sliding rod (51) is slidably connected with a sliding block (52); The top of the outermost sliding block (52) is fixedly connected with a fixed column (53), and the front and back two fixed columns (53) and the left and right two fixed columns (53) are fixedly connected with a sliding column (54); The outer wall of the two sliding columns (54) is respectively slidably connected with a moving block (55).

2. The welding fixture for processing of an automobile door panel according to claim 1, wherein: Each of the support mechanisms (3) comprises: Support column (31), movably penetrating through the welding table (1) and extending upward, for supporting the door plate assembly (7); The outer wall of the support column (31) is provided with a threaded groove, and the outer wall of the threaded groove is threadedly connected with a threaded sleeve (33), for adjusting the height of the support column (31); The outer wall of the support column (31) is sleeved with a tension spring (32), and the two ends of the tension spring (32) are respectively connected with the bottom of the welding table (1) and the threaded sleeve (33).

3. The welding fixture for processing of an automobile door panel according to claim 2, wherein: The moving mechanism (5) further comprises: Two rodless cylinders (56) are respectively fixedly connected to the outer wall of the welding table (1) and are respectively connected with the two sliding blocks (52) on the welding table (1) in transverse and longitudinal directions, for driving the sliding block (52) to move on the outer wall of the sliding rod (51).

4. The welding fixture for processing of an automobile door panel according to claim 3, wherein: The clamping mechanism (4) comprises: Two fixed rods (41) are respectively fixedly connected to the top of the two sliding blocks (52) on the inner side; Two sliding sleeves (42) are respectively sleeved on the outer wall of the two fixed rods (41), and the outer wall of the fixed rod (41) is sleeved with a tension spring (43), for pulling the sliding sleeve (42) to move downward; The pressure rod (44) is fixedly connected to the outer wall of the front and back two sliding sleeves (42) and is fitted on the door plate assembly (7), for fixing the door plate assembly (7); The pressure column (45) movably penetrates through the middle part of the pressure rod (44), and the outer wall of the pressure column (45) is sleeved with a tension spring (46), for pulling the pressure column (45) to move downward and fitting in the recess of the door plate assembly (7).

5. The welding fixture for processing of an automobile door panel according to claim 4, wherein: The fitting mechanism (6) comprises: Cylinder (61), rotatably connected to the bottom of the moving block (55), for driving the laser welding gun (8) to approach the door plate assembly (7); The movable rod (62) is movably inserted into the output end of the cylinder (61), and the outer wall of the movable rod (62) is sleeved with a spring I (63) for pushing the movable rod (62) to move downward; The sliding shaft (64) is movably penetrated into one end of the movable rod (62) away from the cylinder (61), and the outer wall of the sliding shaft (64) is rotatably connected with two rollers (65) at both ends thereof; Two spring IIs (66) are sleeved on the outer wall of the sliding shaft (64) and located at both sides of the movable rod (62), for pushing one end of the sliding shaft (64) to adhere to the side wall of the door plate assembly (7).

6. The welding fixture for processing of an automobile door panel according to claim 5, wherein: The outer wall of the cylinder (61) is provided with a dialing assembly (67) for dialing the angle of the laser welding gun (8), and the dialing assembly (67) comprises: A connecting rod (671) is fixedly connected to the outer wall of the output end of the cylinder (61); An adjusting rod (673) is fixedly connected to the outer wall of the cylinder (61) and located above the connecting rod (671), and corresponding through holes are formed in the connecting rod (671) and the adjusting rod (673); A swing rod (672) is rotatably connected in the through hole of the connecting rod (671) by a pin shaft, and the swing rod (672) is located in the through hole of the adjusting rod (673) and swings; The laser welding gun (8) is installed at the bottom of the swing rod (672).

7. The welding fixture for processing of an automotive door panel according to claim 6, wherein: The dialing assembly (67) further comprises: A push rod (675) is movably connected in the sliding hole of the adjusting rod (673) and abuts against the outer wall of the swing rod (672); A spring III (674) is arranged in the sliding hole and pushes the push rod (675) to abut against the outer wall of the swing rod (672); An adjusting nut (676) is threadedly connected to the adjusting rod (673) and threadedly penetrates into the through hole, and one end of the adjusting nut (676) is spherically arranged and adheres to the outer wall of the swing rod (672).

8. The welding fixture for processing of an automobile door panel according to claim 7, wherein: One end of the connecting rod (671) is hingedly connected with a negative pressure fan (677) for sucking the smoke generated during welding; The negative pressure fan (677) is connected with a conduit (678), and the laser welding gun (8) is connected with a wire; The outer wall of the slide column (54) on the front and rear two sliding blocks (52) is sleeved with a plurality of movable rings (679), the outer wall of the wire and the conduit (678) is sleeved with a protective sleeve, and the protective sleeve is arranged in the annular ring at the bottom of the movable ring (679), a pull spring IV (6710) is connected between each movable ring (679) and the moving block (55), and the pull spring IV (6710) is used for pulling the movable ring (679) to move.

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