A spot welding processing device for elevator door panels

Abstract

The present invention relates to the technical field of welding processing, and specifically discloses a spot welding processing device for elevator door panels, which includes a chassis. A straight plate is fixedly connected to the right side of the top of the chassis. A sliding plate is slidably connected to the top of the straight plate. A welding assembly is arranged on the left side of the sliding plate. The welding assembly includes a connecting frame fixedly connected to the left side of the sliding plate. Chutes are respectively arranged at the top and bottom ends of the left part of the connecting frame. A sliding plate is slidably connected inside the chute. A bent frame is arranged on the left side of the sliding plate. A rotating rod is rotatably connected to the left side inside the bent frame. An installation frame is fixedly connected to the outer wall of the rotating rod. A laser head is fixedly connected inside the installation frame. Rack bars are fixedly connected to the right sides of the two sliding plates. Through the cooperation of the above structures, the two laser heads can perform spot welding in a relatively symmetrical welding manner. Such symmetrical welding can make the deformations caused by each weld seam cancel each other out, thereby minimizing structural deformation and residual stress to the greatest extent, and thus improving the welding quality.

Description

Technical Field

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

[0002] The elevator door panel is one of the important components of an elevator. It not only has an aesthetic and decorative function, but more importantly, it ensures the safety of passengers. When producing elevator door panels, it is necessary to spot weld reinforcing ribs and slider brackets on the elevator door panels.

[0003] The function of the slider bracket of the elevator door panel is multi-faceted. It plays a crucial role in the smooth operation, safety and durability of the elevator door. When producing elevator door panels, it is necessary to use a spot welding device to weld and fix the slider bracket on the elevator door panel. When welding and fixing the slider bracket on the elevator door panel, the slider bracket is usually adhesively bonded to the elevator door panel with glue, and then a laser head emits laser to perform spot welding around the contact area between the slider bracket and the elevator door panel. However, during the laser welding process, the spot welding is usually carried out in sequence around the circumference of the slider bracket. Under the action of the heat source with highly concentrated laser beam, it will cause uneven heat input during the welding process, often generating residual stress, thus affecting the welding quality. 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 make the deformations caused by each weld offset each other, thereby minimizing structural deformation and residual stress to the greatest extent, and improving the welding quality, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A spot welding processing device for elevator door panels, including a chassis. A straight plate is fixedly connected to the right side of the top of the chassis. A sliding plate is slidably connected to the top of the straight plate. A welding assembly is arranged on the left side of the sliding plate. The welding assembly includes a connecting frame fixedly connected to the left side of the sliding plate. Chute grooves are respectively opened at the top and bottom ends of the left part of the connecting frame. A sliding plate is slidably connected inside the chute grooves. A bent frame is arranged on the left side of the sliding plate. A rotating rod is rotatably connected to the left side inside the bent frame. An installation frame is fixedly connected to the outer wall of the rotating rod. A laser head is fixedly connected inside the installation frame. Rack bars are respectively fixedly connected to the right sides of the two sliding plates. A motor is fixedly connected to the middle part on the right side of the connecting frame. The output shaft of the motor extends into the inside of the connecting frame and is fixedly connected with a gear. The outer side of the gear meshes with the rack bar. A first electric telescopic rod is fixedly connected to the right side of the straight plate. The output shaft of the first electric telescopic rod penetrates through the straight plate and is fixedly connected with the right side of the connecting frame.

[0006] Preferably, a bending component is provided on the left side of the connecting frame. The bending component includes a small shaft fixedly connected to the left side of the sliding plate. The left side of the small shaft is rotationally connected to a bending frame. A first torsion spring is fixedly connected between the bending frame and the small shaft. The bending component further includes two pressing frames respectively fixedly connected to the top of the rear end and the bottom of the front side of the rear side of the left side of the connecting frame. The bending component further includes a limiting frame fixedly connected to the outer wall of the bending frame.

[0007] Preferably, the bottom of the limiting frame is arc-shaped. The center of the arc of the arc-shaped bottom of the limiting frame coincides with the center of the small shaft. The radian of the arc-shaped bottom of the limiting frame is greater than 90 degrees. A rotating shaft is rotationally connected to the side of the pressing frame close to the limiting frame.

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

[0009] Preferably, the right side of the sliding rod is inclined. A rolling ball is rotationally connected to the left side of the sliding rod. 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 inclined.

[0010] Preferably, a long plate is fixedly connected to the side of the sliding plate away from the pressing frame. The left end of the long plate is in contact with the bending frame near the bending frame.

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

[0012] Preferably, a preheating component is provided on the side of the mounting frame close to the pressing frame. The preheating component includes a moving frame fixedly connected to one end of the sliding plate close to the pressing frame. A preheating frame is fixedly connected to the left end of the moving frame. 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 pressing frame. A corrugated bladder is fixedly connected between the moving frame and the small plate. An outlet pipe is fixedly inserted into one end of the corrugated bladder close to the moving frame. A first check valve is fixedly installed inside the moving frame at one end of the outlet pipe close to the moving frame. An inlet pipe is fixedly inserted into the other end of the corrugated bladder away from the moving frame. A second check valve is fixedly installed inside the inlet pipe. Spray holes are formed inside the preheating frame.

[0014] Preferably, a supporting plate is fixedly connected to the side of the moving frame close to the small plate. The supporting plate is located below the corrugated bladder. The outer wall of the supporting plate is slidably connected to the small plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. Through the action of the welding assembly, the two laser heads perform spot welding in a relatively symmetric welding manner. Such symmetric welding can make the deformations caused by each weld seam cancel each other out, thereby minimizing structural deformation and residual stress to the greatest extent, and thus improving the welding quality;

[0017] 2. Under the action of the bending assembly, the side surface of the slider bracket can also be welded, which is conducive to improving the welding quality;

[0018] 3. Through the action of the swinging assembly, laser swing welding can be performed, which can make the weld seam more uniform. Because its power output is relatively uniform, it helps to form a symmetrical molten pool. This uniformity makes the surface of the weld seam after welding smooth and improves the overall welding quality;

[0019] 4. Through the action of the preheating assembly, preheating can reduce the temperature difference between the welding area and the surrounding materials, thereby reducing the thermal stress generated during the welding process, and further improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is the overall structure view of the present invention;

[0022] Figure 2 It is the schematic diagram of the overall side view structure of the present invention;

[0023] Figure 3 It is the partial structure view of the connecting frame of the present invention;

[0024] Figure 4 For the present invention Figure 3 The enlarged view at A;

[0025] Figure 5 It is the schematic diagram of the half-section structure of the right side of the connecting frame of the present invention;

[0026] Figure 6 It is the schematic diagram of the half-section structure of the sliding plate at the upper part of the present invention;

[0027] Figure 7 It is the partial structure view of the laser head at the lower part of the present invention;

[0028] Figure 8 Schematic diagram of a partial half-section structure of the lower moving frame of the present invention;

[0029] Figure 9 Right view structure diagram of the connecting frame of the present invention.

[0030] Description of reference numerals:

[0031] 1. Chassis; 2. Straight plate; 3. Slide plate; 4. Welding assembly; 41. Connecting frame; 42. Chute; 43. Sliding plate; 44. Bent 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. Oscillating assembly; 61. Fixed block; 62. Slide bar; 63. Second torsion spring; 64. Long plate; 65. Second electric telescopic rod; 66. Pulling block; 67. Blocking block; 7. Preheating assembly; 71. Moving frame; 72. Preheating frame; 73. Corrugated bladder; 74. Outlet pipe; 75. First check valve; 76. Inlet pipe; 77. Second check valve; 78. Spray hole; 79. Support plate; 8. Small plate; 9. First electric telescopic rod. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 7, the present invention provides a technical solution: a spot welding processing device for elevator door panels, including a chassis 1. A straight plate 2 is fixedly connected to the right side of the top of the chassis 1. A sliding 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 sliding plate 3. The welding assembly 4 includes a connecting frame 41 fixedly connected to the left side of the sliding plate 3. Slide grooves 42 are formed at both the top and bottom ends of the left part of the connecting frame 41. A sliding plate 43 is slidably connected inside the slide grooves 42. A bent frame 44 is arranged on the left side of the sliding plate 43. A rotating rod 45 is rotatably connected to the left side inside the bent frame 44. A mounting frame 46 is fixedly connected to the outer wall of the rotating rod 45. A laser head 47 is fixedly connected inside the mounting frame 46. Rack bars 48 are fixedly connected to the right sides of both the sliding plates 43. A motor 49 is fixedly connected to the middle part on the right side of the connecting frame 41. The output shaft of the motor 49 extends into the inside of the connecting frame 41 and is fixedly connected with a gear 410. The outer side of the gear 410 meshes with the rack bar 48. A first electric telescopic rod 9 is fixedly connected to the right side of the straight plate 2. The output shaft of the first electric telescopic rod 9 penetrates through the straight plate 2 and is fixedly connected to the right side of the connecting frame 41.

[0034] By adopting the above technical solution, a blocking convex block for limiting the elevator door panel is arranged on the top of the chassis 1. When welding the slider bracket on the elevator door panel, first bond the slider bracket to the side of the elevator door panel, and then place the elevator door panel on the top of the chassis 1. The blocking convex block can limit and fix the elevator door panel. Subsequently, the output shaft of the first electric telescopic rod 9 extends out, and the sliding plate 3 moves at the position of the straight plate 2, which can make the connecting frame 41 move towards the left side. In this way, the sliding plate 43, the bent frame 44, the mounting frame 46 and the laser head 47 on the connecting frame 41 can move towards the positions of the elevator door panel and the slider bracket, which is convenient for the laser head 47 to weld the contact area between the elevator door panel and the slider bracket.

[0035] 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, the two laser heads 47 emit laser simultaneously for spot welding. When the first welding point is completed by spot welding, the output shaft of the motor 49 rotates, causing the gear 410 to rotate. With such a design, the upper rack 48 drives the lower sliding plate 43, the bent frame 44, the rotating rod 45, the mounting bracket 46, and the laser head 47 towards the rear end direction, and the lower rack 48 drives the lower sliding plate 43, the bent frame 44, the rotating rod 45, the mounting bracket 46, and the laser head 47 towards the front end direction, so that the position aligned by the laser head 47 moves. Subsequently, laser is emitted again for spot welding, and the above operations are repeated in sequence to complete the welding at the top and bottom of the slider bracket. With such a design, the two laser heads 47 perform spot welding in a relatively symmetric welding manner. Such symmetric welding can make the deformations caused by each weld seam cancel each other out, thereby minimizing structural deformation and residual stress to improve the welding quality.

[0036] Specifically, as Figures 2 to 7 and Figure 9 shown, a bending component 5 is provided on the left side of the connecting frame 41. The bending component 5 includes a small shaft 51 fixedly connected to the left side of the sliding plate 43. The left side of the small shaft 51 is rotationally connected to the bent frame 44. A first torsion spring 52 is fixedly connected between the bent frame 44 and the small shaft 51. The bending component 5 further includes two pressing frames 53 respectively fixedly connected to the top of the rear end and the bottom of the front side of the left side of the connecting frame 41. The bending component 5 further includes a limiting frame 54 fixedly connected to the outer wall of the bent frame 44. The bottom of the limiting frame 54 is arc-shaped, and the center of the arc of the arc-shaped bottom of the limiting frame 54 coincides with the center of the small shaft 51. The radian of the arc-shaped bottom of the limiting frame 54 is greater than 90 degrees. A rotating shaft 55 is rotationally connected to the side of the pressing frame 53 close to the limiting frame 54.

[0037] 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 bending frame 44 and the top surface of the sliding plate 43 are on the same plane. During the welding process, when the lower rack 48 drives the laser head 47 to reach the front position of the slider bracket and the upper rack 48 drives the laser head 47 to reach the rear position of the slider bracket, at this time, the extrusion frame 53 approaches the limiting frame 54 and extrudes the bottom arc of the limiting frame 54. At this time, under the extrusion and limiting action of the extrusion frame 53, the limiting frame 54 drives 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 twists. When the mounting frame 46 and the laser head 47 just rotate 90 degrees, the laser head 47 is aligned with the side surface of the contact between the slider bracket and the elevator door panel. At this time, by controlling the laser head 47, welding is performed between the side surface of the slider bracket and the elevator door panel, so that the side surface of the slider bracket can also be welded, which is beneficial to improving the welding quality.

[0038] The design of the rotating shaft 55 is beneficial to reducing the friction force when the extrusion frame 53 extrudes the limiting frame 54.

[0039] Specifically, as Figures 2 to 7 and Figure 9 shown, a swing assembly 6 is arranged on the left side of the connecting frame 41. The swing assembly 6 includes fixing blocks 61 fixedly connected in a linear array at the upper and lower ends on the left side of the connecting frame 41. The swing assembly 6 further includes a sliding rod 62 slidably connected to the top of the bending frame 44. The swing assembly 6 further includes a second torsion spring 63 fixedly connected between the rotating rod 45 and the bending frame 44. The right side of the sliding rod 62 is inclined. A ball is rotatably connected to the left side of the sliding rod 62. The front end of the upper fixing block 61 and the rear end of the lower fixing block 61 are both inclined. A long plate 64 is fixedly connected to the side of the sliding plate 43 away from the extrusion frame 53. The left end of the long plate 64 is attached to the bending frame 44 near the bending frame 44. A second electric telescopic rod 65 is fixedly connected to the inner side of the vertical part of the bending frame 44. The output shaft of the second electric telescopic rod 65 is fixedly connected with a pulling block 66. An obstructive block 67 is fixedly connected to the side of the sliding rod 62 close to the second electric telescopic rod 65.

[0040] By adopting the above technical solution, the design of the blocking block 67 can prevent the limiting frame 54 from driving the bent frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 to rotate towards the blocking block 67. As the output shaft of the motor 49 drives the gear 410 to rotate, the rack 48 can drive the sliding plate 43, the bent frame 44, the rotating rod 45, the mounting frame 46 and the laser head 47 to move. When the right side of the sliding rod 62 is close to the fixed block 61, under the action of the inclined setting on the left end of the fixed block 61 away from the extrusion frame 53 and the inclined setting on the right side of the sliding rod 62, the sliding rod 62 is limited by the fixed block 61, causing the sliding rod 62 to move to the left, so that the left side of the sliding rod 62 squeezes the mounting frame 46, causing the mounting frame 46 and the laser head 47 to rotate around the axis of the rotating rod 45. During this process, the second torsion spring 63 deforms. As the rack 48 continues to move, when the right side of the sliding rod 62 passes through the fixed block 61 at this position, under the elastic force of the second torsion spring 63, the mounting frame 46 and the laser head 47 can 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 amplitude of jitter. During this process, the laser head 47 emits laser to weld the slider bracket. The design of the small amplitude of jitter enables the laser to swing and weld during welding, making the weld seam more uniform. Because its power output is relatively uniform, it helps to form a symmetrical molten pool. This uniformity makes the surface of the weld seam smooth after welding, improving the overall welding quality.

[0041] In the initial state, the blocking block 67 is not in contact with the pulling block 66. When welding one slider bracket is completed, the output shaft of the second electric telescopic rod 65 contracts, causing the pulling block 66 to move towards the blocking block 67 and squeeze the blocking block 67, making the sliding rod 62 move to the left. At this time, the output shaft of the motor 49 can rotate in the opposite direction to the previous one, facilitating the rotation of the gear 410, so that the gear 410 moves back to its original position.

[0042] Specifically, as Figures 2 to 9 shown, a preheating component 7 is arranged on the side of the mounting frame 46 close to the extrusion frame 53. The preheating component 7 includes a moving frame 71 fixedly connected to one end of the sliding plate 43 close to the extrusion frame 53. The left end of the moving frame 71 is fixedly connected with a preheating frame 72, and the preheating frame 72 is made of copper material.

[0043] By adopting the above technical solution, a heating component for heating is arranged inside the preheating rack 72. The heating component includes, but is not limited to, an electric heating rod. By energizing the electric heating rod, the preheating rack 72 can be heated. And the moving rack 71 is made of heat-insulating material. Since the preheating rack 72 and the moving rack 71 are located on one side of the moving direction of the rack 48 during welding, such a design can preheat the slider bracket and the area of the elevator door panel that is 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 this stress is crucial for maintaining the stability of the welding structure and extending the service life, thus further improving the welding quality.

[0044] Specifically, as Figures 2 to 9 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 bladder 73 is fixedly connected between the moving rack 71 and the small plate 8. An outlet pipe 74 is fixedly inserted into one end of the corrugated bladder 73 close to the moving rack 71. One end of the outlet pipe 74 close to the moving rack 71 is inserted into the inside of the moving rack 71 and fixedly installed with a first check valve 75. An inlet pipe 76 is fixedly inserted into one end of the corrugated bladder 73 away from the moving rack 71. A second check valve 77 is fixedly installed inside the inlet pipe 76. A spray hole 78 is opened inside the preheating rack 72. A support plate 79 is fixedly connected to one side of the moving rack 71 close to the small plate 8. The support plate 79 is located below the corrugated bladder 73. The outer wall of the support plate 79 is slidably connected to the small plate 8.

[0045] By adopting the above technical solution, the check valve is a mature existing technology, so no more details will be described. Under the action of the first check valve 75 and in cooperation with the second check valve 77, when the corrugated bladder 73 is compressed, the gas inside the corrugated bladder 73 can only be discharged from the outlet pipe 74. When the corrugated bladder 73 expands, the external gas can only enter the corrugated bladder 73 from the inlet pipe 76.

[0046] When the electric heating rod heats the air inside the preheating rack 72, when the rack 48 drives the sliding plate 43 and the moving rack 71 to move, under the cooperation of the small plate 8, the corrugated bladder 73 can be squeezed. Thus, during welding, the gas inside the corrugated bladder 73 is discharged from the outlet pipe 74 and enters the inside of the moving rack 71 and then enters the inside of the preheating rack 72. Since the inside of the preheating rack 72 is heated by the electric heating rod, the high-temperature gas is ejected from the spray hole 78 to improve the preheating effect of the slider bracket, thereby further improving the welding quality. The outer wall of the preheating rack 72 near the welding area does not contact the welding area.

[0047] The design of the support plate 79 helps to prevent the middle part of the corrugated bladder 73 from sagging.

[0048] Working principle: First, bond the slider bracket to the side of the elevator door panel. Then, place the elevator door panel on the top of the chassis 1. The blocking bump can limit and fix the elevator door panel. Subsequently, the output shaft of the first electric telescopic rod 9 extends, and the slide plate 3 moves at the position of the straight plate 2, which can make the connecting frame 41 move to the left. In this way, the sliding plate 43, the bent frame 44, the mounting frame 46, and the laser head 47 on the connecting frame 41 move towards the positions of the elevator door panel and the slider bracket, facilitating the welding of the contact area between the laser head 47 and the elevator door panel and the slider bracket. By rotating the output shaft of the motor 49, the gear 410 rotates. With this design, the upper rack 48 drives the lower sliding plate 43, the bent frame 44, the rotating rod 45, the mounting frame 46, and the laser head 47 towards the rear end direction, and the lower rack 48 drives the lower sliding plate 43, the bent frame 44, the rotating rod 45, the mounting frame 46, and the laser head 47 towards the front end direction, thereby moving the position where the laser head 47 is aligned. Subsequently, laser is emitted again for spot welding, and the above operations are repeated in sequence to complete the welding at the top and bottom of the slider bracket. With this design, the two laser heads 47 perform spot welding in a relatively symmetric welding manner. Such symmetric welding can make the deformations caused by each weld offset each other, thereby minimizing structural deformation and residual stress to the greatest extent, and improving the welding quality.

[0049] When the lower rack 48 drives the laser head 47 to reach the front position of the slider bracket and the upper rack 48 drives the laser head 47 to reach the rear position of the slider bracket, at this time, the extrusion frame 53 approaches the limit frame 54 and extrudes 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 drives 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 twists. When the mounting frame 46 and the laser head 47 just rotate 90 degrees, the laser head 47 is aligned with the side of the contact between the slider bracket and the elevator door panel. At this time, by controlling the laser head 47, welding is performed between the side of the slider bracket and the elevator door panel, so that the side of the slider bracket can also be welded, which is conducive to improving the welding quality.

[0050] When the right side of the slide bar 62 is located near the fixed block 61, under the action of the inclined setting on the left end of the fixed block 61 away from the extrusion frame 53 and the inclined setting of the right side of the slide bar 62, the slide bar 62 is limited by the fixed block 61, causing the slide bar 62 to move to the left. As a result, the left side of the slide bar 62 presses against the mounting frame 46, causing the mounting frame 46 and the laser head 47 to rotate around the axis of the rotating rod 45. During this process, the second torsion spring 63 deforms. As the rack 48 continues to move, when the right side of the slide bar 62 passes through the fixed block 61 at this location, under the elastic force of the second torsion spring 63, the mounting frame 46 and the laser head 47 can 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 amplitude of jitter. During this process, the laser head 47 emits laser to weld the slider bracket. The design of the small amplitude of jitter enables the laser to swing during welding, making the weld seam more uniform. Because its power output is relatively uniform, it helps to form a symmetrical molten pool. This uniformity makes the surface of the weld seam smooth after welding, improving the overall welding quality.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. 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 elevator door panels, comprising a chassis (1), characterized in that: On the right side of the top of the chassis (1), a straight plate (2) is fixedly connected. On the top of the straight plate (2), a sliding plate (3) is slidably connected. On the left side of the sliding plate (3), a welding assembly (4) is provided; The welding assembly (4) includes a connecting frame (41) fixedly connected to the left side of the sliding plate (3). At both the top and bottom ends of the left part of the connecting frame (41), sliding grooves (42) are formed. Inside the sliding grooves (42), a sliding plate (43) is slidably connected. On the left side of the sliding plate (43), a bent frame (44) is provided. Inside the left side of the bent frame (44), a rotating rod (45) is rotatably connected. On the outer wall of the rotating rod (45), a mounting frame (46) is fixedly connected. Inside the mounting frame (46), a laser head (47) is fixedly connected. On the right sides of both sliding plates (43), racks (48) are fixedly connected. In the middle part on the right side of the connecting frame (41), a motor (49) is fixedly connected. The output shaft of the motor (49) extends into the inside of the connecting frame (41) and is fixedly connected with a gear (410). The outer side of the gear (410) meshes with the rack (48). On the right side of the straight plate (2), a first electric telescopic rod (9) is fixedly connected. The output shaft of the first electric telescopic rod (9) penetrates through the straight plate (2) and is fixedly connected with the right side of the connecting frame (41); On the left side of the connecting frame (41), a bending assembly (5) is provided. The bending assembly (5) includes a small shaft (51) fixedly connected to the left side of the sliding plate (43). The left side of the small shaft (51) is rotatably connected to the bent frame (44). Between the bent frame (44) and the small shaft (51), a first torsion spring (52) is fixedly connected. The bending assembly (5) further includes two pressing frames (53) respectively fixedly connected to the top of the rear end and the bottom of the front side on the left side of the connecting frame (41). The bending assembly (5) further includes a limiting frame (54) fixedly connected to the outer wall of the bent frame (44); The bottom of the limiting frame (54) is arc-shaped. The center of the arc at the bottom of the limiting frame (54) coincides with the center of the small shaft (51). The radian of the arc at the bottom of the limiting frame (54) is greater than 90 degrees. On the side of the pressing frame (53) close to the limiting frame (54), a rotating shaft (55) is rotatably connected; On the left side of the connecting frame (41), a swinging assembly (6) is provided. The swinging assembly (6) includes fixing blocks (61) fixedly connected in a linear array at the upper and lower ends of the left side of the connecting frame (41). The swinging assembly (6) further includes a sliding rod (62) slidably connected to the top of the bent frame (44). The swinging assembly (6) further includes a second torsion spring (63) fixedly connected between the rotating rod (45) and the bent frame (44); The right side of the sliding rod (62) is inclined. The left side of the sliding rod (62) is rotatably connected with a ball. The front end of the upper fixing block (61) and the rear end of the lower fixing block (61) are both inclined.

2. The spot welding processing device for an elevator door panel according to claim 1, wherein: One side of the sliding plate (43) away from the extrusion frame (53) is fixedly connected with a long plate (64), and one side of the left end of the long plate (64) close to the bending frame (44) is in contact with the bending frame (44).

3. The spot welding processing device for an elevator door panel according to claim 2, characterized in that: A second electric telescopic rod (65) is fixedly connected to the inner side of the vertical part of the bending frame (44), the output shaft of the second electric telescopic rod (65) is fixedly connected with a pulling block (66), and a blocking block (67) is fixedly connected to one side of the sliding rod (62) close to the second electric telescopic rod (65).

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

5. A spot welding processing device for an elevator door panel according to claim 4, 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 corrugated bladder (73) is fixedly connected between the moving frame (71) and the small plate (8). An outlet pipe (74) is fixedly inserted into one end of the corrugated bladder (73) close to the moving frame (71). A first check valve (75) is fixedly installed at one end of the outlet pipe (74) close to the moving frame (71) and inserted into the interior of the moving frame (71). An inlet pipe (76) is fixedly inserted into one end of the corrugated bladder (73) away from the moving frame (71). A second check valve (77) is fixedly installed inside the inlet pipe (76). Spray holes (78) are formed inside the preheating frame (72).

6. The spot welding processing device for an elevator door panel according to claim 5, characterized in that: A support plate (79) is fixedly connected to one side of the moving frame (71) close to the small plate (8). The support plate (79) is located below the corrugated bladder (73), and the outer wall of the support plate (79) is slidably connected to the small plate (8).

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