Spot welding machining device for elevator door plate

Abstract

The invention relates to the technical field of welding machining, and particularly discloses an elevator door plate spot welding machining device which comprises a bottom frame, a straight plate is fixedly connected to the right side of the top of the bottom frame, a sliding plate is slidably connected to the top of the straight plate, and a welding assembly is arranged on the left side of the sliding plate and comprises a connecting frame fixedly connected to the left side of the sliding plate. Sliding grooves are formed in the top and bottom ends of the left portion of the connecting frame, sliding plates are slidably connected into the sliding grooves, bent frames are arranged on the left sides of the sliding plates, rotating rods are rotatably connected to the left sides of the interiors of the bent frames, mounting frames are fixedly connected to the outer walls of the rotating rods, laser heads are fixedly connected into the mounting frames, and racks are fixedly connected to the right sides of the two sliding plates. Through cooperation of the structure, the two laser heads can conduct spot welding in a symmetrical welding mode, deformation caused by welding seams can be offset through symmetrical welding, and therefore structural deformation and residual stress are reduced to the maximum extent, and the welding quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding processing, and in particular to a spot welding processing device for an elevator door panel. Background Art

[0002] The elevator door panel is one of the important components of the elevator. It is not only beautiful and decorative, but more importantly, it ensures the safety of passengers. When the elevator door panel is produced, it is necessary to spot weld the reinforcement ribs and slider brackets on the elevator door panel.

[0003] The slider bracket of the elevator door panel has many functions. It plays a vital role in the smooth operation, safety and durability of the elevator door. When the elevator door panel is produced, the slider bracket needs to be welded and fixed to the elevator door panel by a spot welding device. When the slider bracket is welded and fixed to the elevator door panel, the slider bracket is usually glued to the elevator door panel with glue, and then the laser head is used to emit a laser to spot weld the slider bracket around the contact with the elevator door panel. However, during the laser welding process, the slider bracket is usually spot welded around the circle in sequence. In this way, under the action of the highly concentrated heat source of the laser beam, residual stress is often generated during the welding process due to uneven heat input, thereby affecting the quality of welding. Summary of the invention

[0004] The purpose of the present invention is to provide a spot welding processing device for elevator door panels, which can enable two laser heads to perform spot welding in a relatively symmetrical welding manner. Such symmetrical welding can offset the deformations caused by each weld, thereby minimizing structural deformation and residual stress, thereby improving the quality of welding, and solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spot welding processing device for elevator door panels, comprising a base frame, a straight plate is fixedly connected to the top right side of the base frame, a slide plate is slidably connected to the top of the straight plate, a welding assembly is arranged on the left side of the slide plate, the welding assembly comprises a connecting frame fixedly connected to the left side of the slide plate, slide grooves are provided at both ends of the top and bottom of the left part of the connecting frame, a sliding plate is slidably connected to the inside of the slide groove, a bent frame is arranged on the left side of the sliding plate, a rotating rod is rotatably connected to the inside left side of the bent frame, a mounting frame is fixedly connected to the outer wall of the rotating rod, a laser head is fixedly connected to the inside of the mounting frame, racks are fixedly connected to the right sides of the two sliding plates, a motor is fixedly connected to the middle part of the right side of the connecting frame, the output shaft of the motor extends into the internal fixed connection gear of the connecting frame, the outer side of the gear is meshed with the rack, a first electric telescopic rod is fixedly connected to the right side of the straight plate, and the output shaft of the first electric telescopic rod passes through the straight plate and is fixedly connected to the right side of the connecting frame.

[0006] Preferably, a bending assembly is provided on the left side of the connecting frame, and the bending assembly includes a small shaft fixedly connected to the left side of the sliding plate, the left side of the small shaft is rotatably connected to the bending frame, a first torsion spring is fixedly connected between the bending frame and the small shaft, the bending assembly also includes two extrusion frames respectively fixedly connected to the top of the rear end of the left side of the connecting frame and the bottom of the front end of the rear side, and the bending assembly also includes a limit frame fixedly connected to the outer wall of the bending frame.

[0007] Preferably, the bottom of the limit frame is arc-shaped, the center of the arc of the bottom of the limit frame is consistent with the center of the small shaft, the arc of the bottom of the limit frame is greater than 90 degrees, and the extrusion frame is rotatably connected to a rotating shaft on one side close to the limit frame.

[0008] Preferably, a swing assembly is provided on the left side of the connecting frame, and the swing assembly includes fixed blocks fixedly connected to the upper and lower ends of the left side of the connecting frame in a linear array, the swing assembly also includes a sliding rod slidably connected to the top of the bending frame, and the swing assembly also includes a second torsion spring fixedly connected between the rotating rod and the bending frame.

[0009] Preferably, the right side of the slide bar is tilted, the left side of the slide bar is rotatably connected with a ball, and the front end of the fixing block at the upper end and the rear end of the fixing block at the lower end are both tilted.

[0010] Preferably, a long plate is fixedly connected to a side of the sliding plate away from the extrusion frame, and a left end of the long plate is in contact with the bending frame at a side close to the bending frame.

[0011] Preferably, a second electric telescopic rod is fixedly connected to the inner side of the vertical portion of the bending frame, a pulling block is fixedly connected to the output shaft of the second electric telescopic rod, and a blocking block is fixedly connected to the side of the sliding rod close to the second electric telescopic rod.

[0012] Preferably, a preheating assembly is provided on one side of the mounting frame close to the extrusion frame, and the preheating assembly includes a movable frame fixedly connected to one end of the sliding plate close to the extrusion frame, and the left end of the movable frame is fixedly connected to the preheating frame, and the preheating frame is made of copper material.

[0013] Preferably, a small plate is fixedly connected to one end of the left side of the connecting frame close to the extrusion frame, a corrugated bag is fixedly connected between the movable frame and the small plate, an outlet pipe is fixedly inserted into one end of the corrugated bag close to the movable frame, an end of the outlet pipe close to the movable frame is inserted into the interior of the movable frame and a first check valve is fixedly installed, an inlet pipe is fixedly inserted into one end of the corrugated bag away from the movable frame, a second check valve is fixedly installed inside the inlet pipe, and a spray hole is opened inside the preheating frame.

[0014] Preferably, a support plate is fixedly connected to one side of the movable frame close to the small plate, the support plate is located below the corrugated bag, and the outer wall of the support plate is slidably connected to the small plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the action of the welding assembly, the two laser heads are spot welded in a relatively symmetrical welding manner. Such symmetrical welding can offset the deformation caused by each weld, thereby minimizing structural deformation and residual stress, thereby improving the quality of welding; 2. Through the action of the bending assembly, the side of the slider bracket can also be welded, which is beneficial to improve the quality of welding; 3. Through the action of the swing component, laser swing welding can be performed, which can make the weld more uniform, because its power output is relatively uniform, which helps to form a uniform molten pool. This uniformity makes the weld surface smooth after welding and improves the overall welding quality; 4. Through the role of preheating components, preheating can reduce the temperature difference between the welding area and the surrounding materials, thereby reducing the thermal stress generated during welding, thereby further improving the quality of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is the overall structural view of the present invention; Figure 2 It is a schematic diagram of the overall side view structure of the present invention; Figure 3 It is a partial structural schematic diagram of the connecting frame of the present invention; Figure 4 For the present invention Figure 3 A magnified image of point A; Figure 5 It is a schematic diagram of the right side half-section structure of the connecting frame of the present invention; Figure 6 It is a schematic diagram of a half-section structure of the sliding plate located at the top of the present invention; Figure 7 It is a schematic diagram of the local structure of the laser head at the bottom of the present invention; Figure 8 It is a partial half-section structural schematic diagram of the movable frame at the bottom of the present invention; Fig. 9 It is a right side structural schematic diagram of the connecting frame of the present invention.

[0018] Description of reference numerals: 1. Base frame; 2. Straight board; 3. Slide board; 4. Welding assembly; 41. Connecting frame; 42. Slide slot; 43. Sliding board; 44. Bending frame; 45. Rotating rod; 46. Mounting frame; 47. Laser head; 48. Rack; 49. Motor; 410. Gear; 5. Bending assembly; 51. Small shaft; 52. First torsion spring; 53. Extrusion frame; 54. Limiting frame; 55. Rotating shaft; 6. Swinging assembly; 6 1. Fixed block; 62. Sliding rod; 63. Second torsion spring; 64. Long board; 65. Second electric telescopic rod; 66. Pulling block; 67. Obstruction block; 7. Preheating assembly; 71. Moving rack; 72. Preheating rack; 73. Bellows; 74. Outlet pipe; 75. First check valve; 76. Inlet pipe; 77. Second check valve; 78. Spray hole; 79. Support plate; 8. Small board; 9. First electric telescopic rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figures 1 to 7 The present invention provides a technical solution: a spot welding processing device for elevator door panels, comprising a base frame 1, a straight plate 2 is fixedly connected to the top right side of the base frame 1, a slide plate 3 is slidably connected to the top of the straight plate 2, a welding assembly 4 is arranged on the left side of the slide plate 3, the welding assembly 4 comprises a connecting frame 41 fixedly connected to the left side of the slide plate 3, a slide groove 42 is provided at both ends of the top and bottom of the left part of the connecting frame 41, a sliding plate 43 is slidably connected to the inside of the slide groove 42, a bent frame 44 is arranged on the left side of the sliding plate 43, and a rotating rod 4 is rotatably connected to the inside of the bent frame 44 on the left side 5. The outer wall of the rotating rod 45 is fixedly connected with a mounting frame 46, the interior of the mounting frame 46 is fixedly connected with a laser head 47, the right sides of the two sliding plates 43 are fixedly connected with racks 48, the middle part of the right side of the connecting frame 41 is fixedly connected with a motor 49, the output shaft of the motor 49 extends into the interior of the connecting frame 41 and is fixedly connected with a gear 410, the outer side of the gear 410 is meshed with the rack 48, the right side of the straight plate 2 is fixedly connected with a first electric telescopic rod 9, the output shaft of the first electric telescopic rod 9 passes through the straight plate 2 and is fixedly connected to the right side of the connecting frame 41.

[0021] By adopting the above technical solution, a blocking protrusion for limiting the elevator door panel is provided on the top of the base frame 1. When welding the slider bracket on the elevator door panel, the slider bracket is first bonded to the side of the elevator door panel, and then the elevator door panel is placed on the top of the base frame 1. The blocking protrusion can limit and fix the elevator door panel. Then, the output shaft of the first electric telescopic rod 9 is extended, and the slide plate 3 is moved at the position of the straight plate 2, so that the connecting frame 41 can be moved to the left direction, so that the sliding plate 43, the bending frame 44, the mounting frame 46 and the laser head 47 on the connecting frame 41 can be moved to the position of the elevator door panel and the slider bracket, so that the laser head 47 can weld the contact area between the elevator door panel and the slider bracket.

[0022] In the initial state, the upper laser head 47 is aligned with the top front end position of the slider bracket, and the lower laser head 47 is aligned with the bottom rear end position of the slider bracket. When welding is performed, the two laser heads 47 simultaneously emit lasers for spot welding. When the first welding point is spot welded, the output shaft of the motor 49 is rotated to rotate the gear 410. This design allows the upper rack 48 to move the sliding plate 43, the bent frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 to the rear end, and the lower rack 48 to move the sliding plate 43, the bent frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 to the front end, thereby moving the position aligned with the laser head 47, and then emitting lasers again for spot welding, and repeating the above operations in sequence to complete the welding of the top and bottom of the slider bracket. This design allows the two laser heads 47 to perform spot welding in a relatively symmetrical welding manner. Such symmetrical welding can offset the deformation caused by each weld, thereby minimizing structural deformation and residual stress, thereby improving the quality of welding.

[0023] Specifically, Figures 2 to 7 and Fig. 9 As shown, a bending assembly 5 is provided on the left side of the connecting frame 41, and the bending assembly 5 includes a small shaft 51 fixedly connected to the left side of the sliding plate 43, and the left side of the small shaft 51 is rotatably connected to the bending frame 44, and a first torsion spring 52 is fixedly connected between the bending frame 44 and the small shaft 51, and the bending assembly 5 also includes two extrusion frames 53 respectively fixedly connected to the top of the left rear end and the bottom of the rear front end of the connecting frame 41, and the bending assembly 5 also includes a limiting frame 54 fixedly connected to the outer wall of the bending frame 44, and the bottom of the limiting frame 54 is arc-shaped, and the arc center of the arc of the bottom of the limiting frame 54 is consistent with the center of the small shaft 51, and the arc angle of the bottom of the limiting frame 54 is greater than 90 degrees, and the side of the extrusion frame 53 close to the limiting frame 54 is rotatably connected with a rotating shaft 55.

[0024] By adopting the above technical solution, in the initial state, under the elastic force of the first torsion spring 52, the top surface of the horizontal part of the bent frame 44 and the top surface of the sliding plate 43 are kept on the same plane. During the welding process, when the rack 48 at the bottom brings the laser head 47 to the front position of the slider bracket and the rack 48 at the top brings the laser head 47 to the rear position of the slider bracket, the extrusion frame 53 is close to the limit frame 54 to extrude the bottom arc of the limit frame 54. At this time, under the extrusion and limiting action of the extrusion frame 53, the limit frame 54 brings the bent frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 to rotate around the axis of the small shaft 51. During this process, the first torsion spring 52 is twisted. When the mounting frame 46 and the laser head 47 are just rotated 90 degrees, the laser head 47 is aligned with the side of the slider bracket at the contact point with the elevator door panel. At this time, the laser head 47 is controlled to weld the side of the slider bracket with the elevator door panel, so that the side of the slider bracket can also be welded, which is beneficial to improve the welding quality.

[0025] The design of the rotating shaft 55 is helpful to improve and reduce the friction force when the extrusion frame 53 extrudes the limiting frame 54.

[0026] Specifically, Figures 2 to 7 and Fig. 9 As shown, a swing assembly 6 is provided on the left side of the connecting frame 41, and the swing assembly 6 includes a fixed block 61 fixedly connected to the upper and lower ends of the left side of the connecting frame 41 in a linear array, the swing assembly 6 also includes a slide bar 62 slidably connected to the top of the bent frame 44, and the swing assembly 6 also includes a second torsion spring 63 fixedly connected between the rotating rod 45 and the bent frame 44, the right side of the slide bar 62 is tilted, and the left side of the slide bar 62 is rotatably connected with a ball, the front end of the fixed block 61 at the upper end and the rear end of the fixed block 61 at the lower end are both tilted, the side of the sliding plate 43 away from the extrusion frame 53 is fixedly connected to a long plate 64, and the left end of the long plate 64 is close to the side of the bent frame 44 and fits with the bent frame 44, and the inner side of the vertical part of the bent frame 44 is fixedly connected to a second electric telescopic rod 65, the output shaft of the second electric telescopic rod 65 is fixedly connected to a pulling block 66, and the side of the slide bar 62 close to the second electric telescopic rod 65 is fixedly connected to an obstruction block 67.

[0027] By adopting the above technical solution, the design of the blocking block 67 can prevent the limiting frame 54 from rotating with the bending frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 to approach the blocking block 67. As the output shaft of the motor 49 rotates with the gear 410, the rack 48 can move with the sliding plate 43, the bending frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47. When the right side of the slide bar 62 is located near the fixed block 61, the left end of the fixed block 61 is inclined away from the side of the extrusion frame 53 and the right side of the slide bar 62 is inclined. The slide bar 62 is limited by the fixed block 61, so that the slide bar 62 moves to the left direction, so that the left side of the slide bar 62 squeezes the mounting frame 46, so that the mounting frame 46 and The laser head 47 rotates around the axis of the rotating rod 45. During this process, the second torsion spring 63 is deformed. As the rack 48 continues to move, when the right side of the slide bar 62 passes through the fixed block 61 there, the elastic force of the second torsion spring 63 can make the mounting frame 46 and the laser head 47 rotate. Due to the elastic force characteristics of the second torsion spring 63 itself, the mounting frame 46 and the laser head 47 can rotate with a small vibration. At the same time, the laser head 47 emits a laser to weld the slider bracket. The design of small vibration makes the laser oscillation welding make the weld more uniform during welding, because its power output is relatively uniform, which helps to form a uniform molten pool. This uniformity makes the weld surface smooth after welding, thereby improving the overall welding quality.

[0028] In the initial state, the blocking block 67 is not in contact with the pulling block 66. When a slider bracket is welded, the output shaft of the second electric telescopic rod 65 contracts, causing the pulling block 66 to move toward the blocking block 67 and squeeze the blocking block 67, causing the slide bar 62 to move to the left. At this time, the output shaft of the motor 49 can rotate in the opposite direction to the previous direction, facilitating the rotation of the gear 410, thereby causing the gear 410 to move and reset.

[0029] Specifically, Figures 2 to 9 As shown, a preheating assembly 7 is provided on one side of the mounting frame 46 close to the extrusion frame 53, and the preheating assembly 7 includes a movable frame 71 fixedly connected to one end of the sliding plate 43 close to the extrusion frame 53, and a preheating frame 72 is fixedly connected to the left end of the movable frame 71, and the preheating frame 72 is made of copper material.

[0030] By adopting the above technical solution, a heating component for heating is arranged inside the preheating frame 72, and the heating component includes but is not limited to an electric heating rod. By energizing the electric heating rod, the preheating frame 72 can be heated, and the movable frame 71 is made of a heat-insulating material. Since the preheating frame 72 and the movable frame 71 are located on one side of the moving direction of the rack 48 during welding, such a design can preheat the areas of the slider bracket and the elevator door panel that are about to be welded. Preheating can reduce the temperature difference between the welding area and the surrounding materials, thereby reducing the thermal stress generated during the welding process. The reduction of such stress is crucial to maintaining the stability of the welding structure and extending the service life, thereby further improving the quality of welding.

[0031] Specifically, Figures 2 to 9 As shown, a small plate 8 is fixedly connected to one end of the left side of the connecting frame 41 close to the extrusion frame 53, a corrugated bag 73 is fixedly connected between the movable frame 71 and the small plate 8, an outlet pipe 74 is fixedly inserted at one end of the corrugated bag 73 close to the movable frame 71, and a first check valve 75 is fixedly installed inside the movable frame 71 at one end of the outlet pipe 74 close to the movable frame 71, an inlet pipe 76 is fixedly inserted at one end of the corrugated bag 73 away from the movable frame 71, and a second check valve 77 is fixedly installed inside the inlet pipe 76, a spray hole 78 is opened inside the preheating frame 72, and a support plate 79 is fixedly connected to one side of the movable frame 71 close to the small plate 8, and the support plate 79 is located below the corrugated bag 73, and the outer wall of the support plate 79 is slidably connected to the small plate 8.

[0032] By adopting the above technical solution, the check valve is a mature existing technology, so it will not be elaborated on. Under the action of the first check valve 75 and the coordinated action of the second check valve 77, when the bellows 73 is compressed, the gas inside the bellows 73 can only be discharged from the outlet pipe 74, and when the bellows 73 is stretched, the external gas can only enter the bellows 73 from the inlet pipe 76.

[0033] The electric heating rod is the air inside the preheating rack 72. When the rack 48 moves with the sliding plate 43 and the movable rack 71, the bellows 73 can be squeezed under the action of the small plate 8. In this way, during welding, the gas inside the bellows 73 is discharged from the outlet pipe 74 and enters the interior of the movable rack 71 and the interior of the preheating rack 72. Since the interior of the preheating rack 72 is heated by the electric heating rod, the high-temperature gas is ejected from the ejection hole 78 to improve the preheating effect of the slider bracket, thereby further improving the quality of welding. The outer wall of the preheating rack 72 is close to the welding area and does not contact the welding area.

[0034] The design of the support plate 79 helps prevent the middle portion of the bellows 73 from falling.

[0035] Working principle: first glue the slider bracket to the side of the elevator door panel, then place the elevator door panel on the top of the base frame 1, the blocking convex block can limit and fix the elevator door panel, then extend the output shaft of the first electric telescopic rod 9, and move the slide plate 3 at the position of the straight plate 2, so that the connecting frame 41 can move to the left, so that the sliding plate 43, the bending frame 44, the mounting frame 46 and the laser head 47 on the connecting frame 41 can be moved to the position of the elevator door panel and the slider bracket, so that the laser head 47 can weld the contact area between the elevator door panel and the slider bracket, and rotate the output shaft of the motor 49 to rotate the gear 410. This design makes the rack at the top 48 carries the sliding plate 43, the bent frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 below toward the rear end, and the rack 48 below carries the sliding plate 43, the bent frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 below to move toward the front end, thereby moving the position to which the laser head 47 is aligned, and then emitting the laser again for spot welding, and repeating the above operations in sequence to complete the welding of the top and bottom of the slider bracket. This design allows the two laser heads 47 to perform spot welding in a relatively symmetrical manner, so that the symmetrical welding can offset the deformation caused by each weld, thereby minimizing structural deformation and residual stress, thereby improving the quality of welding.

[0036] When the rack 48 at the bottom brings the laser head 47 to the front position of the slider bracket and the rack 48 at the top brings the laser head 47 to the rear position of the slider bracket, the extrusion frame 53 approaches the limit frame 54 to extrude the bottom arc of the limit frame 54. At this time, under the extrusion and limiting action of the extrusion frame 53, the limit frame 54 brings the bending frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 to rotate around the axis of the small shaft 51. During this process, the first torsion spring 52 is twisted. When the mounting frame 46 and the laser head 47 are rotated just 90 degrees, the laser head 47 is aligned with the side of the slider bracket contacting the elevator door panel. At this time, the laser head 47 is controlled to weld the side of the slider bracket to the elevator door panel, so that the side of the slider bracket can also be welded, which is beneficial to improve the welding quality.

[0037] When the right side of the slide bar 62 is located near the fixed block 61, the left end of the fixed block 61 is inclined away from the side of the extrusion frame 53 and the right side of the slide bar 62 is inclined, so that the slide bar 62 is limited by the fixed block 61, so that the slide bar 62 moves to the left direction, so that the left side of the slide bar 62 squeezes the mounting frame 46, so that the mounting frame 46 and the laser head 47 rotate around the axis of the rotating rod 45. In this process, the second torsion spring 63 is deformed, and as the rack 48 continues to move, when the right side of the slide bar 62 passes through the fixed block 61, the second torsion spring 63 is deformed. When block 61 is in motion, the mounting bracket 46 and the laser head 47 can be rotated under the elastic force of the second torsion spring 63. The elastic force of the second torsion spring 63 itself can cause the mounting bracket 46 and the laser head 47 to rotate with a small vibration. During this process, the laser head 47 emits a laser to weld the slider bracket. The design of small vibration makes the laser oscillation welding make the weld more uniform during welding, because its power output is relatively uniform, which helps to form a uniform molten pool. This uniformity makes the weld surface smooth after welding, thereby improving the overall welding quality.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spot welding processing device for an elevator door panel, comprising a base frame (1), characterized in that: A straight plate (2) is fixedly connected to the right side of the top of the base frame (1), a slide plate (3) is slidably connected to the top of the straight plate (2), and a welding assembly (4) is provided on the left side of the slide plate (3); The welding assembly (4) comprises a connecting frame (41) fixedly connected to the left side of the slide plate (3), a slide groove (42) is provided at both ends of the top and bottom of the left part of the connecting frame (41), a sliding plate (43) is slidably connected inside the slide groove (42), a bending frame (44) is provided on the left side of the sliding plate (43), a rotating rod (45) is rotatably connected to the left side of the bending frame (44), a mounting frame (46) is fixedly connected to the outer wall of the rotating rod (45), and a laser head (47) is fixedly connected inside the mounting frame (46). ), the right sides of the two sliding plates (43) are fixedly connected to racks (48), the middle part of the right side of the connecting frame (41) is fixedly connected to a motor (49), the output shaft of the motor (49) extends into the interior of the connecting frame (41) and is fixedly connected to a gear (410), the outer side of the gear (410) is meshed with the rack (48), the right side of the straight plate (2) is fixedly connected to a first electric telescopic rod (9), the output shaft of the first electric telescopic rod (9) passes through the straight plate (2) and is fixedly connected to the right side of the connecting frame (41).

2. The spot welding processing device for elevator door panels according to claim 1, characterized in that: A bending assembly (5) is provided on the left side of the connecting frame (41), the bending assembly (5) comprising a small shaft (51) fixedly connected to the left side of the sliding plate (43), the left side of the small shaft (51) being rotatably connected to the bending frame (44), a first torsion spring (52) being fixedly connected between the bending frame (44) and the small shaft (51), the bending assembly (5) further comprising two extrusion frames (53) respectively fixedly connected to the top of the rear end of the left side of the connecting frame (41) and the bottom of the rear front end, and the bending assembly (5) further comprising a limit frame (54) fixedly connected to the outer wall of the bending frame (44).

3. The spot welding processing device for elevator door panels according to claim 2 is characterized in that: The bottom of the limiting frame (54) is in an arc shape, the arc center of the bottom of the limiting frame (54) is consistent with the center of the small shaft (51), the arc angle of the bottom of the limiting frame (54) is greater than 90 degrees, and the side of the extrusion frame (53) close to the limiting frame (54) is rotatably connected to a rotating shaft (55).

4. The spot welding processing device for elevator door panels according to claim 1, characterized in that: A swing assembly (6) is provided on the left side of the connecting frame (41), the swing assembly (6) comprising fixed blocks (61) fixedly connected in a linear array to the upper and lower ends of the left side of the connecting frame (41), the swing assembly (6) further comprising a sliding rod (62) slidably connected to the top of the bending frame (44), and the swing assembly (6) further comprising a second torsion spring (63) fixedly connected between the rotating rod (45) and the bending frame (44).

5. The spot welding processing device for elevator door panels according to claim 4, characterized in that: The right side of the slide bar (62) is arranged obliquely, the left side of the slide bar (62) is rotatably connected with a ball bearing, and the front end of the fixing block (61) at the upper end and the rear end of the fixing block (61) at the lower end are both arranged obliquely.

6. The spot welding processing device for elevator door panels according to claim 4, characterized in that: A long plate (64) is fixedly connected to a side of the sliding plate (43) away from the extrusion frame (53), and a left end of the long plate (64) close to a side of the curved frame (44) is in contact with the curved frame (44).

7. The spot welding processing device for elevator door panels according to claim 6, characterized in that: A second electric telescopic rod (65) is fixedly connected to the inner side of the vertical portion of the bent frame (44), a pulling block (66) is fixedly connected to the output shaft of the second electric telescopic rod (65), and a blocking block (67) is fixedly connected to the side of the sliding rod (62) close to the second electric telescopic rod (65).

8. The spot welding processing device for elevator door panels according to claim 1, characterized in that: A preheating assembly (7) is provided on one side of the mounting frame (46) close to the extrusion frame (53), and the preheating assembly (7) comprises a movable frame (71) fixedly connected to one end of the sliding plate (43) close to the extrusion frame (53), and a preheating frame (72) is fixedly connected to the left end of the movable frame (71), and the preheating frame (72) is made of copper material.

9. The spot welding processing device for elevator door panels according to claim 8, characterized in that: A small plate (8) is fixedly connected to one end of the left side of the connecting frame (41) close to the extrusion frame (53); a bellows (73) is fixedly connected between the movable frame (71) and the small plate (8); an outlet pipe (74) is fixedly plugged into one end of the bellows (73) close to the movable frame (71); an end of the outlet pipe (74) close to the movable frame (71) is inserted into the interior of the movable frame (71) and a first check valve (75) is fixedly installed therein; an inlet pipe (76) is fixedly plugged into one end of the bellows (73) away from the movable frame (71); a second check valve (77) is fixedly installed therein; and a spray hole (78) is provided inside the preheating frame (72).

10. The spot welding processing device for elevator door panels according to claim 9, characterized in that: A support plate (79) is fixedly connected to one side of the movable frame (71) close to the small plate (8); the support plate (79) is located below the corrugated bag (73); and an outer wall of the support plate (79) is slidably connected to the small plate (8).

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