A thermoformed integrated door ring and laser welding equipment thereof

Abstract

A thermoformed one-piece door knocker and laser welding equipment thereof, belonging to the technical field of automobile door knocker welding, to solve the problem that the present invention welds the front side of the door knocker by a welding robot, and when the front side welding of the door knocker is completed, a reciprocating drive mechanism and a transmission mechanism are started, and the reciprocating drive mechanism and the transmission mechanism drive a rotating rod to rotate 180° counterclockwise, and a second positioning plate follows the rotating rod to rotate and buckle on the top of the door knocker, and the second hook is buckled with the first hook, and then the reciprocating drive mechanism and the transmission mechanism drive the rotating rod to rotate 180° clockwise, and the second positioning plate is reset and drives the first positioning plate to rotate 180° clockwise, and the door knocker is turned over between the first positioning plate and the second positioning plate, and then the second hook is displaced, and the second hook is disengaged from the first hook, and under the reset action of the clockwork spring, the first positioning plate is reset, and the reverse side of the door knocker can be welded at this time, and the overall working efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of automobile door ring welding, and in particular to a thermoformed integrated door ring and laser welding equipment thereof. Background Art

[0002] Door rings are usually manufactured using hot forming laser welding technology. This technology pre-assembles hot-formed steel plates of the same or different thicknesses into a ring, and then produces parts through a hot forming process. Compared with the traditional stamping process, this technology has the advantages of lighter weight, higher strength, higher material utilization, and better collision performance. It can transfer collision energy more smoothly and effectively to ensure the safety performance of the car. The production process of door rings includes laser welding technology and hot forming technology. Laser welding technology can combine materials of different strengths, toughness and thicknesses, while hot forming technology can achieve a balance of high strength and high toughness after heating.

[0003] At present, the door knocker is divided into single-sided welding and double-sided welding. Double-sided welding has better weld quality, so its mechanical properties are relatively higher. Due to the special shape of the door knocker, the door knocker needs to be turned over and re-positioned during double-sided welding, which wastes time in the entire welding process. Summary of the invention

[0004] The purpose of the present invention is to provide a thermoformed one-piece door knocker and laser welding equipment thereof, which solves the problem of inconvenience in double-sided welding of the existing door knockers in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser welding device for a thermoformed one-piece door ring, comprising a welding workbench and a welding robot arranged on the welding workbench, and also comprising a first positioning plate and a second positioning plate rotatably arranged on the top of the welding workbench, the welding workbench is arranged above the ground through legs, the first positioning plate is used to position the bottom surface of the door ring, and the second positioning plate is used to position the top surface of the door ring, a flip assembly is arranged at the bottom of the welding workbench, the flip assembly comprises a reciprocating drive mechanism and a transmission mechanism arranged at the bottom of the welding workbench, the flip assembly also comprises a rotating rod, a rotating seat corresponding to the end of the rotating rod is fixedly arranged at the front and back of the top of the welding workbench, the edges of the first positioning plate and the second positioning plate are close to each other, the rotating rod is rotatably arranged at a position above the edges of the first positioning plate and the second positioning plate through the rotating seat, the rotating rod is fixedly connected to the second positioning plate through the fixed seat, the rotating rod is rotatably connected to the first positioning plate through the movable seat, the reciprocating drive mechanism and the transmission mechanism are used to drive the rotating rod and the second positioning plate to reciprocate 180°, the flip assembly also comprises a reset mechanism arranged between the fixed seat and the movable seat, the reset mechanism is used to reset the first positioning plate;

[0006] The first hook is fixedly connected to an edge of the first positioning plate away from the second positioning plate, and the second hook is movably provided on an edge of the second positioning plate away from the first positioning plate. The second hook is used to hang with the first hook and drive the first positioning plate to rotate when the second positioning plate rotates. A limiting mechanism corresponding to the second hook is provided on the edge of the second positioning plate and the top of the welding workbench, and the limiting mechanism is used to unlock the second hook and the first hook;

[0007] When one side is welded, the second positioning plate is driven to rotate counterclockwise under the action of the reciprocating drive mechanism, the transmission mechanism and the rotating rod to position the upper surface of the door ring; then, when the second positioning plate is fitted with the first positioning plate, the second positioning plate and the first positioning plate are hung by the first hook and the second hook. At this time, the door ring is located between the first positioning plate and the second positioning plate. The second positioning plate is reset under the action of the flip assembly and drives the first positioning plate to rotate clockwise; finally, when the second positioning plate is reset, the second hook is acted upon by the limiting mechanism, the second hook is unlocked from the first hook, and under the action of the reset mechanism, the first positioning plate is rotated counterclockwise to reset. At this time, the door ring is located above the second positioning plate, and the other side of the door ring is welded.

[0008] Furthermore, a first positioning mold for positioning the door knocker is disposed on the top of the first positioning plate, and a second positioning mold for positioning the door knocker is disposed on the top of the second positioning plate.

[0009] Furthermore, a first slide groove is provided at a position near the edge of the top of the second positioning plate, a second slide groove extending to the side of the second positioning plate is provided on one side of the first slide groove, a spring groove is provided on the other side of the first slide groove, the second hook is slidably connected to the inside of the first slide groove, and the limiting mechanism includes a sliding plate slidably connected to the second slide groove, one end of the sliding plate is fixedly connected to the second hook, the limiting mechanism also includes a first extrusion block fixedly connected to the other end of the sliding plate, a second extrusion block corresponding to the first extrusion block is fixedly connected to the top of the welding workbench, a compression spring is installed between the side of the second hook and the spring groove, and the cross-sectional shape of the first extrusion block and the second extrusion block is a right triangle.

[0010] Furthermore, there are two groups of welding robots on the top of the welding workbench, which are respectively used to weld the two surfaces of the door ring. The top of the welding workbench is also provided with a loading and positioning box, which is used to position the door ring. The top of the welding workbench is also provided with a unloading conveyor belt, which is used to transfer the welded door ring.

[0011] Furthermore, a moving mechanism and a conveying mechanism are arranged above the welding workbench. The conveying mechanism is used to convey the door ring, and the moving mechanism is used to guide the conveying mechanism. The moving mechanism is a component composed of a truss, servo motors arranged at both ends of the truss, and a screw rod and a threaded seat rotatably connected to both sides of the truss.

[0012] Furthermore, the conveying mechanism is provided with two groups, which are used for loading and unloading respectively. The conveying mechanism includes telescopic cylinders movably arranged on both sides below the moving mechanism, and a movable plate fixedly connected to the bottom of the telescopic cylinder. Connecting rods are evenly distributed on the bottom of the movable plate, and a suction cup is arranged at the bottom of the connecting rod. The conveying mechanism also includes a negative pressure tube, one end of which is connected to the suction cup. A negative pressure pump is installed above the moving mechanism. The negative pressure pump has two output ends, which are respectively connected to the other end of the two groups of negative pressure tubes through solenoid valves. By controlling the negative pressure pump and the moving mechanism, the two groups of conveying mechanisms can perform loading and unloading operations.

[0013] Furthermore, the reciprocating drive mechanism includes a motor fixedly installed under the welding workbench, and a fan-shaped gear is fixedly connected to the output end of the motor. The reciprocating drive mechanism also includes a movable ring slidably arranged under the welding workbench through a sliding seat and a sliding rod. First tooth grooves corresponding to the fan-shaped gear are arranged on both sides of the interior of the movable ring, and second tooth grooves are evenly distributed on the upper part of the exterior of the movable ring. When the motor drives the fan gear to rotate, the fan gear meshes with the first tooth groove up and down to drive the movable ring to reciprocate horizontally left and right.

[0014] Furthermore, the transmission mechanism includes a spur gear and a driving wheel, which are rotatably arranged below the welding workbench through an axis and an axis seat, wherein the spur gear is meshed with the second tooth groove, and the transmission mechanism also includes a transmission wheel fixedly connected to the middle part of the rotating rod, and a synchronous belt is installed between the transmission wheel and the driving wheel. When the movable ring moves back and forth laterally, the spur gear is meshed through the second tooth groove, and then the rotating rod is driven to reciprocate clockwise and counterclockwise at 180° through the driving wheel, the transmission wheel and the synchronous belt.

[0015] Furthermore, the reset mechanism includes a large disc fixedly connected to the fixed seat, and a small disc fixedly connected to the movable seat, the inner side of the large disc and the outer side of the small disc are respectively provided with a first interlocking groove and a second interlocking groove, the small disc is rotatably connected to the inner side of the large disc, and a clockwork spring is installed in the second interlocking groove and the first interlocking groove, and the clockwork spring has a reset function.

[0016] Another solution proposed by the present invention: a door ring welded by a laser welding device for a hot-formed one-piece door ring, wherein the door ring is welded by an A-pillar reinforcement plate, a side panel reinforcement plate, a B-pillar reinforcement plate and a door sill reinforcement plate, wherein the thickness of the A-pillar reinforcement plate and the side panel reinforcement plate is 1.2 mm, the thickness of the B-pillar reinforcement plate is 1.8 mm, the thickness of the door sill reinforcement plate is 1.4 mm, and the tensile strength at the weld is 1350-1650 MPa.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a hot-formed one-piece door knocker and its laser welding equipment, which welds the front side of the door knocker through a welding robot, and starts the reciprocating drive mechanism and the transmission mechanism when the welding is completed, and the reciprocating drive mechanism and the transmission mechanism drive the rotating rod to rotate 180° counterclockwise, and the second positioning plate follows the rotating rod to rotate and is buckled on the top of the door knocker, and the second hook is buckled with the first hook. Subsequently, the reciprocating drive mechanism and the transmission mechanism drive the rotating rod to rotate 180° clockwise, and the second positioning plate is reset and drives the first positioning plate to rotate 180° clockwise, and the door knocker is turned over between the first positioning plate and the second positioning plate. When the second positioning plate is rotated to a horizontal state, the first extrusion block is squeezed by the second extrusion block, so that the second hook is displaced, and the second hook is disengaged from the first hook, and under the resetting action of the clockwork spring, the first positioning plate is rotated 180° counterclockwise to reset, and after the welding is completed, the moving mechanism and the conveying mechanism cooperate to place the door knocker welded above the second positioning plate on the unloading conveyor belt to complete the unloading, and the overall work efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the welding workbench, moving mechanism, conveying mechanism and turning assembly of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the welding workbench, the loading and positioning box, the moving mechanism and the conveying mechanism of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a welding workbench, a first positioning plate, a second positioning plate and a flip assembly of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the first positioning plate, the second positioning plate and the flip assembly of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the first positioning plate and the second positioning plate of the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified view of the structure at center;

[0026] Figure 8 It is a schematic diagram of the structure of the flip assembly of the present invention;

[0027] Fig. 9 It is a schematic diagram of the structure of the reciprocating drive mechanism and the transmission mechanism of the present invention;

[0028] Fig.10 It is an exploded view of the fixed seat, movable seat and reset mechanism structure of the present invention;

[0029] Fig.11 Schematic diagram of four states of the first positioning plate and the second positioning plate of the present invention;

[0030] Fig.12 It is a schematic diagram of the door knocker structure of the present invention.

[0031] In the figure: 1. welding workbench; 2. welding robot; 3. loading positioning box; 31. positioning slot; 4. unloading conveyor belt; 5. moving mechanism; 6. conveying mechanism; 61. negative pressure pump; 62. solenoid valve; 63. negative pressure pipe; 64. telescopic cylinder; 65. movable plate; 66. connecting rod; 67. suction cup; 7. first positioning plate; 71. first positioning mold; 72. first hook; 8. second positioning plate; 81. second positioning mold; 83. first slide; 84. second slide; 85. spring slot; 86. second hook; 861. compression spring; 87. sliding plate; 88. first extrusion block; 89. second extrusion block; 9. flip assembly; 91. Compound drive mechanism; 911, motor; 912, sector gear; 913, movable ring; 914, first tooth groove; 915, second tooth groove; 917, sliding rod; 916, sliding seat; 92, transmission mechanism; 921, spur gear; 922, driving wheel; 923, transmission wheel; 924, synchronous belt; 93, rotating rod; 931, rotating seat; 94, fixed seat; 95, movable seat; 96, reset mechanism; 961, large disc; 962, first fitting groove; 963, small disc; 964, second fitting groove; 965, spring; 101, A-pillar reinforcement plate; 102, side panel reinforcement plate; 103, B-pillar reinforcement plate; 104, door sill reinforcement plate. DETAILED DESCRIPTION

[0032] 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.

[0033] In order to solve the technical problem that the existing door knocker has inconvenience when double-sided welding, such as Figure 1-Figure 12 As shown, the following preferred technical solutions are provided:

[0034] like Figure 1-Figure 2 As shown, a laser welding device for a thermoformed integrated door ring includes a welding workbench 1 and a welding robot 2 arranged on the welding workbench 1, and also includes a first positioning plate 7 and a second positioning plate 8 rotatably arranged on the top of the welding workbench 1. The welding workbench 1 is arranged above the ground through legs, the first positioning plate 7 is used to position the bottom surface of the door ring, and the second positioning plate 8 is used to position the top surface of the door ring. A flip assembly 9 is arranged at the bottom of the welding workbench 1, as shown in FIG. Figure 4 and Figure 8 As shown, the flip assembly 9 includes a reciprocating drive mechanism 91 and a transmission mechanism 92 arranged at the bottom of the welding workbench 1, the flip assembly 9 also includes a rotating rod 93, and a rotating seat 931 corresponding to the end of the rotating rod 93 is fixedly arranged on the front and back of the top of the welding workbench 1, the first positioning plate 7 and the second positioning plate 8 are close to each other, and the rotating rod 93 is rotatably arranged at the upper position of the edge of the first positioning plate 7 and the second positioning plate 8 through the rotating seat 931, the rotating rod 93 is fixedly connected to the second positioning plate 8 through the fixed seat 94, and the rotating rod 93 is rotatably connected to the first positioning plate 7 through the movable seat 95. The reciprocating drive mechanism 91 and the transmission mechanism 92 are used to drive the rotating rod 93 and the second positioning plate 8 to reciprocate 180°. The flip assembly 9 also includes a reset mechanism 96 arranged between the fixed seat 94 and the movable seat 95, and the reset mechanism 96 is used to reset the first positioning plate 7;

[0035] like Figure 5-Figure 7 As shown, the edge of the first positioning plate 7 away from the second positioning plate 8 is fixedly connected with the first hook 72, and the edge of the second positioning plate 8 away from the first positioning plate 7 is movably provided with a second hook 86, the second hook 86 is used to hang with the first hook 72 and drive the first positioning plate 7 to rotate when the second positioning plate 8 rotates, and the edge of the second positioning plate 8 and the top of the welding workbench 1 are provided with a limiting mechanism corresponding to the second hook 86, and the limiting mechanism is used for unlocking between the second hook 86 and the first hook 72;

[0036] like Fig.11As shown, the top is the initial state, the angle between the first positioning plate 7 and the second positioning plate 8 is 180°, and the door ring on the first positioning plate 7 is welded; when one side is welded, the second positioning plate 8 is driven to rotate counterclockwise under the action of the reciprocating drive mechanism 91, the transmission mechanism 92 and the rotating rod 93 and position the upper surface of the door ring; then when the second positioning plate 8 is fitted with the first positioning plate 7, the second positioning plate 8 and the first positioning plate 7 are hung by the first hook 72 and the second hook 86. At this time, the door ring is located between the first positioning plate 7 and the second positioning plate 8, and the second positioning plate 8 is reset under the action of the flip assembly 9 and drives the first positioning plate 7 to rotate clockwise; finally, when the second positioning plate 8 is reset, the second hook 86 is affected by the limiting mechanism, and the second hook 86 is unlocked from the first hook 72. Under the action of the reset mechanism 96, the first positioning plate 7 is reset counterclockwise. At this time, the door ring is located above the second positioning plate 8, and the other side of the door ring is welded.

[0037] like Figure 5 As shown, a first positioning mold 71 for positioning the door knocker is disposed on the top of the first positioning plate 7, and a second positioning mold 81 for positioning the door knocker is disposed on the top of the second positioning plate 8.

[0038] like Figure 7 As shown, a first slide groove 83 is provided at a position near the edge of the top of the second positioning plate 8, a second slide groove 84 extending to the side of the second positioning plate 8 is provided on one side of the first slide groove 83, a spring groove 85 is provided on the other side of the first slide groove 83, and the second hook 86 is slidably connected to the inside of the first slide groove 83, and the limiting mechanism includes a sliding plate 87 slidably connected to the second slide groove 84, one end of the sliding plate 87 is fixedly connected to the second hook 86, and the limiting mechanism also includes a first extrusion block 88 fixedly connected to the other end of the sliding plate 87, and a second extrusion block 89 corresponding to the first extrusion block 88 is fixedly connected to the top of the welding workbench 1, and a compression spring 861 is installed between the side of the second hook 86 and the spring groove 85, and the cross-sectional shape of the first extrusion block 88 and the second extrusion block 89 is a right triangle.

[0039] like Figure 1 As shown, there are two groups of welding robots 2 on the top of the welding workbench 1, which are respectively used to weld the two surfaces of the door ring. A loading and positioning box 3 is also provided on the top of the welding workbench 1. A positioning groove 31 is provided inside the loading and positioning box 3. The positioning groove 31 is used to position the door ring. A unloading conveyor belt 4 is also provided on the top of the welding workbench 1. The unloading conveyor belt 4 is used to transfer the welded door ring.

[0040] like Figure 2-Figure 3As shown, a moving mechanism 5 and a conveying mechanism 6 are arranged above the welding workbench 1. The conveying mechanism 6 is used to convey the door ring, and the moving mechanism 5 is used to guide the conveying mechanism 6. The moving mechanism 5 is a component composed of a truss, servo motors arranged at both ends of the truss, and a screw rod and a threaded seat rotatably connected to both sides of the inside of the truss.

[0041] The conveying mechanism 6 is provided with two groups, which are used for loading and unloading respectively. The conveying mechanism 6 includes telescopic cylinders 64 movably arranged on both sides below the moving mechanism 5, and a movable plate 65 fixedly connected to the bottom of the telescopic cylinder 64. Connecting rods 66 are evenly distributed on the bottom of the movable plate 65, and a suction cup 67 is arranged at the bottom of the connecting rod 66. The conveying mechanism 6 also includes a negative pressure pipe 63, one end of the negative pressure pipe 63 is connected to the suction cup 67, and a negative pressure pump 61 is installed above the moving mechanism 5. The negative pressure pump 61 has two output ends, and the two output ends are respectively connected to the other end of the two groups of negative pressure pipes 63 through solenoid valves 62. By controlling the negative pressure pump 61 and the moving mechanism 5, the two groups of conveying mechanisms 6 can perform loading and unloading operations.

[0042] like Figure 8-Figure 10 As shown, the reciprocating drive mechanism 91 includes a motor 911 fixedly installed under the welding workbench 1, and the output end of the motor 911 is fixedly connected to a fan gear 912. The reciprocating drive mechanism 91 also includes a movable ring 913 slidably set under the welding workbench 1 through a sliding seat 916 and a sliding rod 917. The movable ring 913 has first tooth grooves 914 corresponding to the fan gear 912 on both sides of the interior, and second tooth grooves 915 are evenly distributed on the upper part of the exterior of the movable ring 913. When the motor 911 drives the fan gear 912 to rotate, the fan gear 912 engages with the first tooth groove 914 up and down to drive the movable ring 913 to reciprocate horizontally left and right.

[0043] The transmission mechanism 92 includes a spur gear 921 and a driving wheel 922, which are rotatably arranged below the welding workbench 1 through an axis and an axis seat, wherein the spur gear 921 is meshed and connected with the second tooth groove 915, and the transmission mechanism 92 also includes a transmission wheel 923 fixedly connected to the middle part of the rotating rod 93, and a synchronous belt 924 is installed between the transmission wheel 923 and the driving wheel 922. When the movable ring 913 moves back and forth laterally, the spur gear 921 is meshed through the second tooth groove 915, and then the rotating rod 93 is driven to reciprocate clockwise and counterclockwise at 180° through the driving wheel 922, the transmission wheel 923 and the synchronous belt 924.

[0044] The reset mechanism 96 includes a large disk 961 fixedly connected to the fixed seat 94, and a small disk 963 fixedly connected to the movable seat 95. The inner side of the large disk 961 and the outer side of the small disk 963 are respectively provided with a first interlocking groove 962 and a second interlocking groove 964. The small disk 963 is rotatably connected to the inner side of the large disk 961. A clockwork spring 965 is installed in the second interlocking groove 964 and the first interlocking groove 962. The clockwork spring 965 has a reset function.

[0045] In order to better explain the above embodiment, the present invention proposes: a door ring welded by a laser welding device for a hot-formed one-piece door ring: the door ring is welded by an A-pillar reinforcement plate 101, a side reinforcement plate 102, a B-pillar reinforcement plate 103 and a door sill reinforcement plate 104, wherein the thickness of the A-pillar reinforcement plate 101 and the side reinforcement plate 102 is 1.2 mm, the thickness of the B-pillar reinforcement plate 103 is 1.8 mm, the thickness of the door sill reinforcement plate 104 is 1.4 mm, and the tensile strength at the weld is 1350-1650 MPa.

[0046] Working principle: first, place the door ring to be welded inside the loading and positioning box 3, then start the moving mechanism 5 and the conveying mechanism 6 to transport the door ring inside the loading and positioning box 3 and place it on the first positioning mold 71 on the top of the first positioning plate 7, then weld the front of the door ring through the welding robot 2, and when the welding is completed, start the reciprocating drive mechanism 91 and the transmission mechanism 92, and the reciprocating drive mechanism 91 and the transmission mechanism 92 drive the rotating rod 93 to rotate 180° counterclockwise. During this process, the second positioning plate 8 follows the rotating rod 93 to rotate and buckle above the door ring. At this time, the second hook 86 is buckled with the first hook 72, and then the reciprocating drive mechanism 91 and the transmission mechanism 92 drive the rotating rod 93 to rotate 180° clockwise. At this time, the second positioning plate 8 is reset and drives the first positioning plate 7 to rotate clockwise. After the first positioning plate 7 and the second positioning plate 8 are turned over, the first pressing block 88 is pressed by the second pressing block 89, so that the second hook 86 is displaced, and the second hook 86 is disengaged from the first hook 72. Under the resetting action of the clockwork spring 965, the first positioning plate 7 is rotated 180° counterclockwise to reset. At this time, the door ring inside the loading positioning box 3 can continue to be conveyed to the top of the first positioning plate 7. The two groups of welding robots 2 simultaneously weld the front side of the door ring above the first positioning plate 7 and the back side of the door ring above the second positioning plate 8. After the welding is completed, the moving mechanism 5 and the conveying mechanism 6 cooperate to place the welded door ring above the second positioning plate 8 on the unloading conveyor belt 4 to complete the unloading, and the overall work efficiency is high.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser welding device for a thermoformed integrated door ring, comprising a welding workbench (1) and a welding robot (2) disposed on the welding workbench (1), and also comprising a first positioning plate (7) and a second positioning plate (8) rotatably disposed on the top of the welding workbench (1), characterized in that: The welding workbench (1) is arranged above the ground via legs; the first positioning plate (7) is used to position the bottom surface of the door knocker; the second positioning plate (8) is used to position the top surface of the door knocker; a flip assembly (9) is arranged at the bottom of the welding workbench (1); the flip assembly (9) comprises a reciprocating drive mechanism (91) and a transmission mechanism (92) arranged at the bottom of the welding workbench (1); the flip assembly (9) further comprises a rotating rod (93); rotating seats (931) corresponding to the ends of the rotating rod (93) are fixedly arranged at the front and rear of the top of the welding workbench (1); the edges of the first positioning plate (7) and the second positioning plate (8) are close to each other; the rotating rod (93) is arranged at the front and rear of the top of the welding workbench (1); (93) is rotatably arranged at a position above the edge of the first positioning plate (7) and the second positioning plate (8) through a rotating seat (931), the rotating rod (93) is fixedly connected to the second positioning plate (8) through a fixed seat (94), the rotating rod (93) is rotatably connected to the first positioning plate (7) through a movable seat (95), the reciprocating drive mechanism (91) and the transmission mechanism (92) are used to drive the rotating rod (93) and the second positioning plate (8) to reciprocate 180°, and the flip assembly (9) also includes a reset mechanism (96) arranged between the fixed seat (94) and the movable seat (95), and the reset mechanism (96) is used to reset the first positioning plate (7); The edge of the first positioning plate (7) away from the second positioning plate (8) is fixedly connected with a first hook (72), and the edge of the second positioning plate (8) away from the first positioning plate (7) is movably provided with a second hook (86), the second hook (86) is used to be hung with the first hook (72) and drive the first positioning plate (7) to rotate when the second positioning plate (8) rotates, and the edge of the second positioning plate (8) and the top of the welding workbench (1) are provided with a limiting mechanism corresponding to the second hook (86), and the limiting mechanism is used to unlock the second hook (86) and the first hook (72); A first slide groove (83) is provided at a position near the edge of the top of the second positioning plate (8), a second slide groove (84) extending to the side of the second positioning plate (8) is provided on one side of the first slide groove (83), a spring groove (85) is provided on the other side of the first slide groove (83), the second hook (86) is slidably connected to the inside of the first slide groove (83), the limiting mechanism comprises a sliding plate (87) slidably connected to the second slide groove (84), one end of the sliding plate (87) is fixedly connected to the second hook (86), the limiting mechanism also comprises a first extrusion block (88) fixedly connected to the other end of the sliding plate (87), a second extrusion block (89) corresponding to the first extrusion block (88) is fixedly connected to the top of the welding workbench (1), a compression spring (861) is installed between the side of the second hook (86) and the spring groove (85), and the cross-sectional shape of the first extrusion block (88) and the second extrusion block (89) is a right triangle.

2. The laser welding equipment for thermoforming integrated door knocker according to claim 1, characterized in that: A first positioning mold (71) for positioning the door ring is provided on the top of the first positioning plate (7), and a second positioning mold (81) for positioning the door ring is provided on the top of the second positioning plate (8).

3. The laser welding equipment for thermoformed integrated door knocker according to claim 1, characterized in that: Two groups of welding robots (2) are arranged on the top of the welding workbench (1), which are respectively used to weld the two surfaces of the door ring. A loading and positioning box (3) is also arranged on the top of the welding workbench (1), and the loading and positioning box (3) is used to position the door ring. A unloading conveyor belt (4) is also arranged on the top of the welding workbench (1), and the unloading conveyor belt (4) is used to transfer the welded door ring.

4. The laser welding equipment for thermoformed integrated door knocker according to claim 1, characterized in that: A moving mechanism (5) and a conveying mechanism (6) are arranged above the welding workbench (1); the conveying mechanism (6) is used to convey the door ring, and the moving mechanism (5) is used to guide the conveying mechanism (6); the moving mechanism (5) is a component consisting of a truss, servo motors arranged at both ends of the truss, and a screw rod and a threaded seat rotatably connected to both sides of the truss.

5. The laser welding equipment for thermoforming integrated door knocker according to claim 4, characterized in that: The conveying mechanism (6) is provided with two groups, which are used for loading and unloading respectively. The conveying mechanism (6) comprises telescopic cylinders (64) movably arranged on both sides below the moving mechanism (5), and a movable plate (65) fixedly connected below the telescopic cylinder (64). Connecting rods (66) are evenly distributed at the bottom of the movable plate (65). A suction cup (67) is provided at the bottom of the connecting rod (66). The conveying mechanism (6) further comprises a negative pressure pipe (63). One end of the negative pressure pipe (63) is connected to the suction cup (67). A negative pressure pump (61) is installed above the moving mechanism (5). The negative pressure pump (61) has two output ends. The two output ends are respectively connected to the other ends of the two groups of negative pressure pipes (63) through electromagnetic valves (62).

6. The laser welding equipment for thermoforming integrated door knocker according to claim 1, characterized in that: The reciprocating drive mechanism (91) comprises a motor (911) fixedly mounted below the welding workbench (1), the output end of the motor (911) being fixedly connected to a sector gear (912), and the reciprocating drive mechanism (91) further comprises a movable ring (913) slidably mounted below the welding workbench (1) via a sliding seat (916) and a sliding rod (917), first tooth grooves (914) corresponding to the sector gear (912) being arranged on both sides of the interior of the movable ring (913), and second tooth grooves (915) being evenly distributed on the exterior of the movable ring (913).

7. The laser welding equipment for thermoformed integrated door knocker according to claim 6, characterized in that: The transmission mechanism (92) comprises a spur gear (921) and a driving wheel (922), the spur gear (921) and the driving wheel (922) being rotatably arranged below the welding workbench (1) via a shaft and a shaft seat, wherein the spur gear (921) is meshingly connected with the second tooth groove (915), and the transmission mechanism (92) further comprises a transmission wheel (923) fixedly connected to the middle part of the rotating rod (93), and a synchronous belt (924) is installed between the transmission wheel (923) and the driving wheel (922).

8. The laser welding equipment for thermoforming one-piece door knocker according to claim 7, characterized in that: The reset mechanism (96) comprises a large disc (961) fixedly connected to the fixed seat (94), and a small disc (963) fixedly connected to the movable seat (95); a first fitting groove (962) and a second fitting groove (964) are respectively provided on the inner side of the large disc (961) and the outer side of the small disc (963); the small disc (963) is rotatably connected to the inner side of the large disc (961); a spring spring (965) is installed in the second fitting groove (964) and the first fitting groove (962); the spring spring (965) has a reset function.

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