Double-head laser synchronous welding device and welding method

Abstract

The present invention relates to a double-head laser synchronous welding device and a welding method, and relates to the technical field of welding equipment. The synchronous welding device comprises a guide rail, a bracket, and a first welding unit and a second welding unit arranged at both ends of the bracket. The bracket is connected to the guide rail and can move along the guide rail. The first welding unit comprises a first laser welding head, and the second welding unit comprises a second laser welding head. The laser emitting part of the first laser welding head and the laser emitting part of the second laser welding head are arranged opposite to each other, and the neutral position between the two laser emitting parts forms a welding position. Since the synchronous welding device is provided with two relative welding units, the upper and lower or left and right gaps of the fitting side between the metal plate and the edging plate can be synchronously welded at the same time, so as to avoid the metal plate and the edging plate being not firmly connected during the process of flipping the metal plate to weld the two gaps one by one, resulting in the misalignment of the second weld, and effectively improve the welding efficiency and weld quality.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to a double-head laser synchronous welding device and a welding method. Background Art

[0002] In the field of metal processing, especially in the automobile manufacturing, home appliance production and aerospace industries, the laser welding hemming process of metal plates is widely used due to its high precision, high strength connection and good appearance quality. This process mainly uses the high temperature of the laser beam to quickly melt and solidify the metal plate and the hemming material (such as metal strips, frames, etc.) at the contact interface, thereby achieving a firm combination, which not only meets the structural strength requirements, but also improves the aesthetics of the product.

[0003] However, traditional laser welding hemming technology faces many challenges in its implementation. Most of the methods widely used in the market currently rely on manually operated welding robots or handheld welding heads. Specifically, for the hemming welding of each metal plate, due to the diversity of welding positions and the shape differences of the hemming materials, multiple (usually 8) welding operations are often required to complete the entire hemming process. Before each welding, workers are required to accurately adjust the position of the metal plate and the hemming material to ensure the accuracy of the welding path. In addition, when the metal plate is large in size or complex in shape, the metal plate is also flipped to complete the welding of all edges. In this process, not only the labor intensity of the workers is increased, but also the production efficiency is significantly reduced due to frequent adjustments of positions and flipping of metal plates.

[0004] Therefore, the market urgently needs a more efficient and intelligent laser welding hemming solution. Summary of the invention

[0005] The purpose of the present invention is to provide a double-head laser synchronous welding device and a welding method in order to overcome the defects of the above-mentioned prior art, improve production efficiency and welding quality, and meet the needs of modern manufacturing industry for automation and intelligence.

[0006] The purpose of the present invention can be achieved through the following technical solutions.

[0007] A double-head laser synchronous welding device comprises a guide rail, a bracket, and a first welding unit and a second welding unit arranged at both ends of the bracket, the bracket is connected to the guide rail and can move along the guide rail, the first welding unit comprises a first laser welding head, the second welding unit comprises a second laser welding head, the laser emitting part of the first laser welding head and the laser emitting part of the second laser welding head are arranged facing each other, and the neutral position between the two laser emitting parts forms a welding position.

[0008] In one embodiment, the first laser welding head and the second laser welding head are vertically symmetrically arranged;

[0009] Alternatively, the first laser welding head and the second laser welding head are arranged horizontally symmetrically.

[0010] In one embodiment, the laser emitting portion of the first laser welding head and the laser emitting portion of the second laser welding head are arranged on the same line.

[0011] In one embodiment, the first welding unit comprises a first A-axis spacing adjustment mechanism, the first laser welding head is connected to the bracket via the first A-axis spacing adjustment mechanism, and the first laser welding head can move in the A-axis direction so as to approach or move away from the second laser welding head, and the A-axis direction is the direction in which the first laser welding head (11) and the second laser welding head (21) are relatively arranged.

[0012] In one embodiment, the second welding unit includes a second A-axis spacing adjustment mechanism, the second laser welding head is connected to the bracket through the second A-axis spacing adjustment mechanism, and the second laser welding head can move in the A-axis direction to approach or move away from the first laser welding head.

[0013] In one embodiment, the first welding unit comprises a first B-axis spacing adjustment mechanism, the first laser welding head is connected to the bracket via the first B-axis spacing adjustment mechanism, and the first laser welding head can move in the B-axis direction so as to approach or move away from the bracket, and the B-axis direction is the direction in which the first laser welding head (11) and the bracket (30) are arranged relative to each other.

[0014] In one embodiment, the second welding unit includes a second B-axis spacing adjustment mechanism, the second laser welding head is connected to the bracket via the second B-axis spacing adjustment mechanism, and the second laser welding head can move in the B-axis direction to get closer to or farther away from the bracket.

[0015] In one embodiment, a workpiece table is further included, the workpiece table is used to fix the metal plate to be welded, at least two limiters are arranged on the workpiece table, each limiter includes a limit plate and a moving mechanism, the moving mechanism drives the limit plate to be in a limit state or an open state; when in the limit state, the limit plate is attached to the edge plate and presses the edge plate against one side of the metal plate to be welded; when in the open state, the limit plate leaves the edge plate;

[0016] The limiter is located at one side of the guide rail and is arranged along the direction of the guide rail. When the bracket moves along the guide rail to the position of one of the limiters, the limiter can be in an open state for avoidance.

[0017] In one of the embodiments, a sensor is disposed on one side of each limiter, and when the sensor detects the bracket, the corresponding limiter is converted from a limited state to an open state.

[0018] A welding method, applicable to the above-mentioned double-head laser synchronous welding device, uses an integrated first laser welding head and a second laser welding head to simultaneously laser weld two parallel welds between a metal plate and an edge plate located at a welding position; the laser emitting part of the first laser welding head and the laser emitting part of the second laser welding head are arranged facing each other, and the empty position between the two laser emitting parts forms a welding position.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the process of using the above-mentioned double-head laser synchronous welding device, the metal plate to be welded is first placed between the first welding unit and the second welding unit. More specifically, the metal plate to be welded is horizontally placed in the neutral position between the first laser welding head and the second laser welding head. Then the edge plate is attached to the side of the metal plate to be welded, and a gap to be welded is formed between the edge plate and the side of the metal plate to be welded. At this time, the first laser welding head and the second laser welding head are respectively located on both sides of the gap to be welded. The first laser welding head and the second laser welding head are started, and the bracket carries the first laser welding head and the second laser welding head to move along the guide rail, and finally two butt welds parallel to the guide rail are formed, completing the welding of the metal plate and the edge plate. Since the synchronous welding device is provided with two relative welding units, the two gaps above and below or left and right between the attached side of the metal plate and the edge plate can be synchronously welded at the same time, so as to avoid the metal plate and the edge plate being not firmly connected during the process of flipping the metal plate to weld the two gaps one by one, resulting in the misalignment of the second weld, which effectively improves the welding efficiency and weld quality.

[0021] 2. The first A-axis spacing adjustment mechanism is used to drive the first laser welding head along the A-axis to approach or move away from the second laser welding head, and can adjust the distance between the first laser welding head and the first weld; the second A-axis spacing adjustment mechanism is used to drive the second laser welding head along the A-axis to approach or move away from the first laser welding head, and can adjust the distance between the second laser welding head and the second weld. Therefore, the first A-axis spacing adjustment mechanism and the second A-axis spacing adjustment mechanism are conducive to adjusting the distance between the laser welding head and the weld, and adjusting the neutral position between the two laser welding heads, leaving more operating space for the placement and removal of metal plates, and can also adapt to different metal plate thicknesses, sizes and shapes.

[0022] 3. The synchronous welding device is provided with a first B-axis spacing adjustment mechanism and a second B-axis spacing adjustment mechanism, which are used to respectively adjust the positions of the first laser welding head and the second laser welding head on the B-axis, and can be used to adjust the colinearity between the laser of the first laser welding head and the laser of the second laser welding head, and is used to adapt to the upper and lower welds located in the same plane, and can also adapt to the upper and lower welds that are not in the same plane, effectively broadening the use scenarios and application scope of the welding device.

[0023] 4. The workpiece table and limiter on the synchronous welding device, the moving mechanism can drive the limit plate to switch between the limit state and the open state. When the limit plate is in the limit state, the limit plate can fix the relative position of the metal plate and the edging plate to ensure that the edging plate remains stationary before the weld between the metal plate and the edging plate is formed; when the limit plate is in the open state, the weld between the edging plate and the metal plate in front of the limit plate has been formed, and the edging plate no longer needs the support of the limit plate. The laser welding head moves to the position of the limit plate to weld the edging plate and the metal plate at the position of the limit plate. Therefore, the limit plate can not only fix the relative position of the metal plate and the edging plate, but also cooperate with the welding unit to avoid blocking the welding laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of a synchronous welding device in one embodiment.

[0025] Figure 2 It is a side view of a synchronous welding device in one embodiment.

[0026] Figure 3 It is a three-dimensional diagram of a synchronous welding device in another embodiment.

[0027] Figure 4 FIG. 4 is a top view of a synchronous welding device in another embodiment.

[0028] Figure 5 It is a side view of a synchronous welding device in another embodiment.

[0029] Figure 6 FIG. 4 is a three-dimensional diagram of a first welding unit in an embodiment.

[0030] Figure 7 FIG. 4 is a three-dimensional diagram of the first welding unit from another perspective in an embodiment.

[0031] Figure 8 FIG. 4 is a three-dimensional diagram of a second welding unit in one embodiment.

[0032] Fig. 9 It is a three-dimensional diagram of a guide rail and a bracket in one embodiment.

[0033] Fig.10 It is a three-dimensional diagram of a limiter and a workpiece table in one embodiment.

[0034] Fig.11 It is a bottom view of the limiter and the workpiece table in one embodiment.

[0035] Fig.12 It is a three-dimensional diagram of a limiter in one embodiment.

[0036] Reference numerals: 100, synchronous welding device; 10, first welding unit; 11, first laser welding head; 12, first laser controller; 13, first laser generator; 14, first laser fixing member; 15, first A-axis spacing adjustment mechanism; 151, first A-axis lead screw; 152, first A-axis support member; 153, second A-axis support member; 154, first A-axis slider; 155, first A-axis turntable; 156, first A-axis handle; 16, first B-axis spacing adjustment mechanism; 16 1. First B-axis screw rod; 162. First B-axis support member; 163. Second B-axis support member; 164. First B-axis slider; 165. First B-axis turntable; 166. First B-axis handle; 20. Second welding unit; 21. Second laser welding head; 22. Second laser controller; 23. Second laser generator; 24. Second laser fixture; 25. Second A-axis spacing adjustment mechanism; 251. Second A-axis screw rod; 252. Third A-axis support member; 253. Fourth A-axis support member ; 254, second A-axis slider; 255, second A-axis turntable; 256, second A-axis handle; 26, second B-axis spacing adjustment mechanism; 261, second B-axis screw rod; 262, third B-axis support member; 263, fourth B-axis support member; 264, second B-axis slider; 265, second B-axis turntable; 266, second B-axis handle; 30, bracket; 31, gear; 32, first sliding part; 33, second sliding part; 34, first slider; 35, second slider; 40, guide rail; 41. Guide rail support; 42. First guide rail; 43. Drive motor; 44. Second guide rail; 45. Third guide rail; 50. Work table; 60. Limiter; 61. Limit plate; 611. Support part; 612. Fitting part; 62. Moving mechanism; 63. First fine-tuning bolt; 64. Fine-tuning plate; 65. Second fine-tuning bolt; 70. Equipment main frame; 71. First main frame; 72. Second main frame; 73. Support leg; 80. Metal plate; 81. Edge plate; 82. Neutral position. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0038] The double-head laser synchronous welding device 100 in some embodiments is described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, in one embodiment, a double-head laser synchronous welding device 100 is provided, including a guide rail 40, a bracket 30, and a first welding unit 10 and a second welding unit 20 arranged at both ends of the bracket 30, the bracket 30 is connected to the guide rail 40 and can move along the guide rail 40, the first welding unit 10 includes a first laser welding head 11, the second welding unit 20 includes a second laser welding head 21, the laser emitting part of the first laser welding head 11 and the laser emitting part of the second laser welding head 21 are arranged opposite to each other, and the neutral position 82 between the two laser emitting parts forms a welding position.

[0040] During use of the above-mentioned double-head laser synchronous welding device 100, the metal plate 80 to be welded is first placed between the first welding unit 10 and the second welding unit 20. More specifically, the metal plate 80 to be welded is horizontally placed in the neutral position 82 between the first laser welding head 11 and the second laser welding head 21, and then the edging plate 81 is attached to the side to be welded of the metal plate 80, and a gap to be welded is formed between the edging plate 81 and the side to be welded of the metal plate 80. At this time, the first laser welding head 11 and the second laser welding head 21 are respectively located on both sides of the gap to be welded, and the first laser welding head 11 and the second laser welding head 21 are started, and the bracket 30 carries the first laser welding head 11 and the second laser welding head 21 to move along the guide rail 40, and finally two butt welds parallel to the guide rail 40 are formed, completing the welding of the metal plate 80 and the edging plate 81. Since the synchronous welding device 100 is provided with two relative welding units, the upper and lower or left and right gaps on the fitting sides between the metal plate 80 and the edging plate 81 can be synchronously welded at the same time, avoiding the process of flipping the metal plate 80 to weld the two gaps one by one, and avoiding the loose connection between the metal plate 80 and the edging plate 81, which causes the second weld to be misaligned, thereby effectively improving the welding efficiency and weld quality.

[0041] Specifically, Figure 6 and Figure 7As shown, in one embodiment, the first welding unit 10 includes a first laser controller 12, a first laser generator 13, a first laser welding head 11 and a first laser fixture 14. The first laser fixture 14 is connected to the bracket 30. The first laser controller 12, the first laser generator 13 and the first laser welding head 11 are all arranged on the first laser fixture 14. The first laser welding head 11 is connected to the first laser generator 13 for guiding the laser generated by the first laser generator 13 to be projected to a preset position. The first laser controller 12 is connected to the first laser generator 13 for controlling the time, intensity and other parameters of the laser generated by the first laser generator 13, as well as controlling the switch of the first laser generator 13.

[0042] Understandably, if Figure 6 and Figure 8 As shown, the structure of the second welding unit 20 may be the same as that of the first welding unit 10, or may be different. As long as the laser welding function can be realized and the laser emission part of the first laser welding head 11 and the laser emission part of the second laser welding head 21 are arranged opposite to each other, the structure of the second welding unit 20 is not limited here.

[0043] In one embodiment, if Figure 2 and Figure 8 As shown, the second welding unit 20 includes a second laser controller 22, a second laser generator 23, a second laser welding head 21 and a second laser fixture 24. The second laser fixture 24 is connected to the bracket 30. The second laser controller 22, the second laser generator 23 and the second laser welding head 21 are all arranged on the second laser fixture 24. The second laser welding head 21 is connected to the second laser generator 23 and is used to guide the laser generated by the second laser generator 23 to be projected to a preset position. The second laser controller 22 is connected to the second laser generator 23 and is used to control the time, intensity and other parameters of the laser generated by the second laser generator 23, as well as to control the switch of the second laser generator 23.

[0044] Specifically, Figure 1 , Figure 4 and Fig. 9 As shown, in one embodiment, the guide rail 40 includes a guide rail support 41, a first guide rail 42 and a driving motor 43 provided on the guide rail support 41, the first guide rail 42 is a toothed guide rail, the bracket 30 is provided with a gear 31 matched with the first guide rail 42, and the output shaft of the driving motor 43 is connected with the gear 31, and is used to drive the gear 31 to move along the first guide rail 42. The first guide rail 42 is the main component for the bracket 30 to slide along the guide rail 40, providing power for the bracket 30 to move, so that the sliding is smoother.

[0045] It can be understood that the first guide rail 42 can also be a screw guide rail. A screw slider is provided on the bracket 30 to cooperate with the screw guide rail. The drive motor 43 drives the screw to rotate to realize the movement of the bracket 30.

[0046] Furthermore, if Fig. 9 As shown, in one embodiment, the guide rail 40 further includes a second guide rail 44 and a third guide rail 45. The guides of the first guide rail 42, the second guide rail 44 and the third guide rail 45 are parallel. The second guide rail 44 and the third guide rail 45 are respectively arranged on two mutually perpendicular sides of the guide rail support 41, and the first guide rail 42 is arranged between the second guide rail 44 and the third guide rail 45. The bracket 30 includes a first sliding portion 32 and a second sliding portion 33 which are perpendicular to each other. The first sliding portion 32 is provided with a first slider 34 and a second slider 35. The first slider 34 is slidably matched with the second guide rail 44, and the second slider 35 is slidably matched with the third guide rail 45. The gear 31 is arranged on the first sliding portion 32. The second guide rail 44 and the third guide rail 45 are used to assist the first guide rail 42, so that the sliding of the bracket 30 along the guide rail 40 is more stable and reliable.

[0047] The second guide rail 44 and the third guide rail 45 are both I-shaped guide rails, and the first slider 34 and the second slider 35 are groove-shaped sliders that match them.

[0048] Specifically, Figure 2 , Figure 3 and Figure 5 As shown, in one embodiment, the first laser welding head 11 and the second laser welding head 21 are vertically symmetrically arranged. That is, the first laser welding head 11 and the second laser welding head 21 are symmetrically arranged along the height direction, so the metal plate 80 to be processed can be horizontally placed between the first laser welding head 11 and the second laser welding head 21, and the edge plate 81 can be vertically placed between the first laser welding head 11 and the second laser welding head 21, and fit with the side of the metal plate 80. The first laser welding head 11 and the second laser welding head 21 are used to weld the upper and lower gaps between the metal plate 80 and the edge plate 81 respectively.

[0049] Optionally, in one embodiment, the first laser welding head 11 and the second laser welding head 21 are arranged horizontally symmetrically. That is, the first laser welding head 11 and the second laser welding head 21 are arranged symmetrically in the horizontal direction, so the plate surface of the metal plate 80 to be processed can be vertically placed between the first laser welding head 11 and the second laser welding head 21, and the edge plate 81 is horizontally placed between the first laser welding head 11 and the second laser welding head 21, and is fitted with the side of the metal plate 80. The first laser welding head 11 and the second laser welding head 21 are used to weld the left and right gaps between the metal plate 80 and the edge plate 81, respectively.

[0050] Furthermore, in one embodiment, the laser emitting portion of the first laser welding head 11 and the laser emitting portion of the second laser welding head 21 are arranged in a colinear manner. That is, the laser emitted by the first laser welding head 11 and the laser emitted by the second laser welding head 21 are located on the same straight line, so as to ensure that the two welds of the metal plate 80 are completely aligned.

[0051] Specifically, Figure 2 , Figure 5 and Figure 6 As shown, in one embodiment, the first welding unit 10 includes a first A-axis spacing adjustment mechanism 15, the first laser welding head 11 is connected to the bracket 30 through the first A-axis spacing adjustment mechanism 15, and the first laser welding head 11 can move in the A-axis direction, so as to approach or move away from the second laser welding head 21, and the A-axis direction is the direction in which the first laser welding head 11 and the second laser welding head 21 are relatively set.

[0052] Furthermore, if Figure 2 , Figure 5 and Figure 8 As shown, in one embodiment, the second welding unit 20 includes a second A-axis spacing adjustment mechanism 25, the second laser welding head 21 is connected to the bracket 30 through the second A-axis spacing adjustment mechanism 25, and the second laser welding head 21 can move in the A-axis direction, thereby approaching or moving away from the first laser welding head 11.

[0053] The first A-axis spacing adjustment mechanism 15 is used to drive the first laser welding head 11 to approach or move away from the second laser welding head 21 along the A-axis, and can adjust the distance between the first laser welding head 11 and the first weld; the second A-axis spacing adjustment mechanism 25 is used to drive the second laser welding head 21 to approach or move away from the first laser welding head 11 along the A-axis, and can adjust the distance between the second laser welding head 21 and the second weld. Therefore, the first A-axis spacing adjustment mechanism 15 and the second A-axis spacing adjustment mechanism 25 are conducive to adjusting the distance between the laser welding head and the weld, and adjusting the neutral position 82 between the two laser welding heads, so as to reserve more operating space for the placement and removal of the metal plate 80, and can also adapt to different thicknesses, sizes and shapes of the metal plate 80.

[0054] The direction in which the first laser welding head 11 and the second laser welding head 21 are relatively arranged is the A axis, and the A axis is perpendicular to the guide of the guide rail 40 .

[0055] Furthermore, if Figure 2 and Figure 5As shown, in one embodiment, the structures of the first A-axis spacing adjustment mechanism 15 and the second A-axis spacing adjustment mechanism 25 may be the same or different, as long as the first laser welding head 11 and the second laser welding head 21 can be moved along the A-axis. The first A-axis spacing adjustment mechanism 15 and the second A-axis spacing adjustment mechanism 25 may be a cylinder adjustment mechanism or a screw adjustment mechanism. In the present invention, a screw adjustment mechanism is more preferred, which is convenient for adjusting the slight distance change between the first laser welding head 11 and the second laser welding head 21 on the A-axis and improving the adjustment accuracy.

[0056] In this specific embodiment, Figure 6 As shown, the first A-axis spacing adjustment mechanism 15 includes a first A-axis screw rod 151, a first A-axis support member 152, a second A-axis support member 153, and a first A-axis slider 154. The first A-axis support member 152, the first A-axis slider 154, and the second A-axis support member 153 are rotatably sleeved on the first A-axis screw rod 151 in sequence, the second A-axis support member 153 is connected to the bracket 30, and the first A-axis slider 154 is connected to the first laser welding head 11. Rotating the first A-axis screw rod 151 can make the first A-axis slider 154 move along the A-axis, thereby driving the first laser welding head 11 to move along the A-axis.

[0057] In addition, a first A-axis turntable 155 is provided on the end of the first A-axis screw rod 151 away from the bracket 30, and a first A-axis handle 156 is provided on the first A-axis turntable 155. The first A-axis turntable 155 and the first A-axis handle 156 facilitate manual rotation of the first A-axis screw rod 151 to adjust the A-axis position of the first laser welding head 11.

[0058] Among them, a rotating bearing is provided between the first A-axis support 152 and the first A-axis screw rod 151, and a rotating bearing is provided between the second A-axis support 153 and the first A-axis screw rod 151. A plurality of guide rods are also movably interspersed on the first A-axis support 152, the first A-axis slider 154 and the second A-axis support 153.

[0059] In this specific embodiment, Figure 8 As shown, the second A-axis spacing adjustment mechanism 25 includes a second A-axis screw 251, a third A-axis support 252, a fourth A-axis support 253, and a second A-axis slider 254. The third A-axis support 252, the second A-axis slider 254, and the fourth A-axis support 253 are rotatably mounted on the second A-axis screw 251 in sequence, the fourth A-axis support 253 is connected to the bracket 30, and the second A-axis slider 254 is connected to the second laser welding head 21. Rotating the second A-axis screw 251 can make the second A-axis slider 254 move along the A-axis, thereby driving the second laser welding head 21 to move along the A-axis.

[0060] In addition, a second A-axis turntable 255 is provided on the end of the second A-axis screw rod 251 away from the bracket 30, and a second A-axis handle 256 is provided on the second A-axis turntable 255. The second A-axis turntable 255 and the second A-axis handle 256 facilitate manual rotation of the second A-axis screw rod 251 to adjust the A-axis position of the second laser welding head 21.

[0061] Among them, a rotating bearing is provided between the third A-axis support 252 and the second A-axis screw rod 251, a rotating bearing is provided between the fourth A-axis support 253 and the second A-axis screw rod 251, and a plurality of guide rods are movably interspersed on the third A-axis support 252, the second A-axis slider 254 and the fourth A-axis support 253.

[0062] Specifically, Figure 2 , Figure 5 and Figure 6 As shown, in one embodiment, the first welding unit 10 includes a first B-axis spacing adjustment mechanism 16, the first laser welding head 11 is connected to the bracket 30 through the first B-axis spacing adjustment mechanism 16, and the first laser welding head 11 can move in the B-axis direction, so as to approach or move away from the bracket 30, and the B-axis direction is the direction in which the first laser welding head 11 and the bracket 30 are relatively set.

[0063] Furthermore, if Figure 2 , Figure 5 and Figure 8 As shown, in one embodiment, the second welding unit 20 includes a second B-axis spacing adjustment mechanism 26, the second laser welding head 21 is connected to the bracket 30 through the second B-axis spacing adjustment mechanism 26, and the second laser welding head 21 can move in the B-axis direction to approach or move away from the bracket 30.

[0064] The B-axis direction is perpendicular to the guide of the guide rail and the A-axis direction.

[0065] The synchronous welding device 100 is provided with a first B-axis spacing adjustment mechanism 16 and a second B-axis spacing adjustment mechanism 26, which are used to adjust the positions of the first laser welding head 11 and the second laser welding head 21 on the B axis respectively, and can be used to adjust the colinearity between the laser of the first laser welding head 11 and the laser of the second laser welding head 21, so as to adapt to two upper and lower welds located in the same plane, and can also adapt to two upper and lower welds not in the same plane, thereby effectively broadening the use scenarios and application scope of the welding device.

[0066] Furthermore, if Figure 2 and Figure 5As shown, in one embodiment, the structures of the first B-axis spacing adjustment mechanism 16 and the second B-axis spacing adjustment mechanism 26 may be the same or different, as long as the first laser welding head 11 and the second laser welding head 21 can be moved along the B-axis. The first B-axis spacing adjustment mechanism 16 and the second B-axis spacing adjustment mechanism 26 may be a cylinder adjustment mechanism or a screw adjustment mechanism. In the present invention, a screw adjustment mechanism is more preferably used, which is convenient for adjusting the small distance change between the first laser welding head 11 and the second laser welding head 21 on the B-axis and improving the adjustment accuracy.

[0067] Furthermore, if Figure 6 As shown, in one embodiment, the first B-axis spacing adjustment mechanism 16 includes a first B-axis screw rod 161, a first B-axis support member 162, a second B-axis support member 163 and a first B-axis slider 164. The first B-axis screw rod 161 is movably arranged in the first B-axis support member 162, the first B-axis slider 164 and the second B-axis support member 163 in sequence. The first B-axis slider 164 is connected to the first laser welding head 11, and the second B-axis support member 163 is connected to the bracket 30. Rotating the first B-axis screw rod 161 can enable the first B-axis slider 164 to drive the first laser welding head 11 to move along the B-axis.

[0068] In addition, a first B-axis turntable 165 is provided on the end of the first B-axis screw rod 161 away from the bracket 30, and a first B-axis handle 166 is provided on the first B-axis turntable 165. The first B-axis turntable 165 and the first B-axis handle 166 facilitate manual rotation of the first B-axis screw rod 161 to adjust the B-axis position of the first laser welding head 11.

[0069] Among them, a rotating bearing is provided between the first B-axis screw rod 161 and the first B-axis support member 162, and a rotating bearing is provided between the first B-axis screw rod 161 and the second B-axis support member 163. A plurality of guide rods are movably interspersed on the first B-axis support member 162, the first B-axis slider 164 and the second B-axis support member 163.

[0070] Furthermore, if Figure 8 As shown, in one embodiment, the second B-axis spacing adjustment mechanism 26 includes a second B-axis screw rod 261, a third B-axis support member 262, a fourth B-axis support member 263 and a second B-axis slider 264. The second B-axis screw rod 261 is movably arranged in the third B-axis support member 262, the second B-axis slider 264 and the fourth B-axis support member 263 in sequence. The second B-axis slider 264 is connected to the second laser welding head 21, and the fourth B-axis support member 263 is connected to the bracket 30. Rotating the second B-axis screw rod 261 can enable the second B-axis slider 264 to drive the second laser welding head 21 to move along the B-axis.

[0071] In addition, a second B-axis turntable 265 is provided on the end of the second B-axis screw rod 261 away from the bracket 30, and a second B-axis handle 266 is provided on the second B-axis turntable 265. The second B-axis turntable 265 and the second B-axis handle 266 facilitate manual rotation of the second B-axis screw rod 261 to adjust the B-axis position of the second laser welding head 21.

[0072] Among them, a rotating bearing is provided between the second B-axis screw rod 261 and the third B-axis support member 262, and a rotating bearing is provided between the second B-axis screw rod 261 and the fourth B-axis support member 263. A plurality of guide rods are also movably interspersed on the third B-axis support member 262, the second B-axis slider 264 and the fourth B-axis support member 263.

[0073] Furthermore, if Figure 6 As shown, the first welding unit 10 is provided with a first A-axis spacing adjustment mechanism 15 and a first B-axis spacing adjustment mechanism 16, at which time the second A-axis support member 153 is connected to the bracket 30, the second B-axis support member 163 is connected to the first A-axis slider 154, and the first B-axis slider 164 is connected to the first laser welding head 11 through a first transition guide rod, and the first transition guide rod movably passes through the first A-axis slider 154. Therefore, when the first A-axis slider 154 moves along the A-axis, the first B-axis spacing adjustment mechanism 16 moves along the A-axis; when the first B-axis slider 164 moves along the B-axis, the first A-axis spacing adjustment mechanism 15 remains stationary.

[0074] Understandably, if Figure 8 As shown, the second welding unit 20 is provided with a second A-axis spacing adjustment mechanism 25 and a second B-axis spacing adjustment mechanism 26. At this time, the fourth A-axis support 253 is connected to the bracket 30, the fourth B-axis support 263 is connected to the second A-axis slider 254, and the second B-axis slider 264 is connected to the second laser welding head 21 through the second transition guide rod, and the second transition guide rod moves through the second A-axis slider 254. Therefore, when the second A-axis slider 254 moves along the A-axis, the second B-axis spacing adjustment mechanism 26 moves along the A-axis; when the second B-axis slider 264 moves along the B-axis, the second A-axis spacing adjustment mechanism 25 remains stationary.

[0075] Specifically, Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the synchronous welding device 100 also includes a workpiece table 50, which is used to fix the metal plate 80 to be welded. At least two limiters 60 are arranged on the workpiece table 50, and each limiter 60 includes a limit plate 61 and a moving mechanism 62. The moving mechanism 62 drives the limit plate 61 to be in a limited state or an open state; when in the limited state, the limit plate 61 fits the edging plate 81 and presses the edging plate 81 against one side of the metal plate 80 to be welded; when in the open state, the limit plate 61 leaves the edging plate 81.

[0076] The stopper 60 is located at one side of the guide rail 40 and is arranged along the direction of the guide rail 40. When the bracket 30 moves along the guide rail 40 to the position of one of the stoppers 60, the stopper 60 can be in an open state for avoidance. Therefore, a plurality of stoppers 60 are arranged in sequence along the guide rail 40 to support different lengths of the edge plate 81.

[0077] The workpiece table 50 and the limiter 60 on the synchronous welding device 100, the moving mechanism 62 can drive the limit plate 61 to switch between the limit state and the open state. When the limit plate 61 is in the limit state, the limit plate 61 can fix the relative position of the metal plate 80 and the edging plate 81 to ensure that the edging plate 81 remains stationary before the weld between the metal plate 80 and the edging plate 81 is formed; when the limit plate 61 is in the open state, the weld between the edging plate 81 and the metal plate 80 in front of the limit plate 61 has been formed, and the edging plate 81 no longer needs the support of the limit plate 61. The laser welding head moves to the position of the limit plate 61 to weld the edging plate 81 and the metal plate 80 at the position of the limit plate 61. Therefore, the limit plate 61 can not only fix the relative position of the metal plate 80 and the edging plate 81, but also cooperate with the welding unit to avoid blocking the welding laser.

[0078] Furthermore, if Fig.10 , Fig.11 and Fig.12 As shown, in one embodiment, the limit plate 61 is movably connected to the workpiece table 50 so that it can rotate around a horizontal axis relative to the workpiece table 50. The moving mechanism 62 is a telescopic cylinder, which is rotatably connected to the workpiece table 50 so that it can rotate around a horizontal axis relative to the workpiece table 50. The output shaft of the telescopic cylinder is rotatably connected to the limit plate 61 around a horizontal axis. When the telescopic cylinder is in an extended state, the limit plate 61 is in a limited state. When the telescopic cylinder is in a retracted state, the limit plate 61 is in an open state. A working surface for placing a metal plate 80 is provided on the workpiece table 50. When the telescopic cylinder switches from an extended state to a retracted state, the limit plate 61 rotates in a direction away from the working surface.

[0079] Furthermore, if Fig.12As shown, in one embodiment, the limit plate 61 includes a supporting portion 611 and a fitting portion 612 that are connected to each other. The supporting portion 611 is rotatably connected to the workpiece table 50, and the moving mechanism 62 is rotatably connected to the supporting portion 611. When the limit plate 61 is in a limited state, the supporting portion 611 is parallel to the working surface and is used to support the edge plate 81. The fitting portion 612 is located on the side of the edge plate 81 away from the metal plate 80 and abuts against the edge plate 81. When the limit plate 61 is in an open state, the supporting portion 611 forms an angle with the working surface, and the angle between the supporting portion 611 and the working surface is greater than 45°. In order to avoid the blocking of the laser by the limit plate 61 and the interference of the limit plate 61 with the movement of the bracket 30 along the guide rail 40, the angle between the supporting portion 611 and the workpiece table 50 can be set to 90 degrees.

[0080] Among them, the supporting portion 611 and the fitting portion 612 are arranged at an angle to each other, and the angle between the supporting portion 611 and the fitting portion 612 depends on the connection direction of the metal plate 80 and the edging plate 81. Generally speaking, the edging plate 81 is arranged parallel to the side of the metal plate 80, and the supporting portion 611 and the fitting portion 612 can be arranged perpendicular to each other.

[0081] In this specific embodiment, Fig.12 As shown, a first fine-tuning bolt 63 is provided on the limit plate 61, and the first fine-tuning bolt 63 passes through the support portion 611 and abuts against the workpiece table 50. Therefore, by rotating the first fine-tuning bolt 63, the height distance between the support plate and the workpiece table 50 can be controlled, and then the relative height position of the edging plate 81 and the metal plate 80 can be controlled, ensuring that the upper side surface of the edging plate 81 is aligned with the upper side surface of the metal plate 80, thereby improving the flexibility of the height position of the edging plate 81 and the metal plate 80 during welding.

[0082] Among them, a fine-tuning plate 64 and a second fine-tuning bolt 65 are provided on the limiting plate 61. The fine-tuning plate 64 is provided on the supporting portion 611 and is used to abut against the edging plate 81. The second fine-tuning bolt 65 passes through the fitting portion 612 and is connected to the fine-tuning plate 64. By rotating the second fine-tuning bolt 65, the fine-tuning plate 64 can be pushed, thereby adjusting the size of the gap between the edging plate 81 and the metal plate 80 to ensure that the edging plate 81 and the metal plate 80 are fully fitted.

[0083] In this specific embodiment, a right-angle groove is provided on the fine-tuning plate 64, and the edging plate 81 is placed in the right-angle groove.

[0084] Further, in one embodiment, a sensor is provided on one side of each stopper 60, and when the sensor detects the bracket 30, the corresponding stopper 60 is converted from the limit state to the open state. The sensor is electrically connected to the moving mechanism 62 of the corresponding stopper 60, and when the sensor detects the bracket 30, the moving mechanism 62 drives the stopper 60 to be converted from the limit state to the open state.

[0085] Specifically, Figure 3 and Figure 5 As shown, in one embodiment, the synchronous welding device 100 also includes an equipment main frame 70, and the equipment main body includes a first main frame 71 for fixing the guide rail 40 and a second main frame 72 for fixing the workpiece table 50. The first main frame 71 and the second main frame 72 are detachably connected. A plurality of legs 73 are provided on the first main frame 71 and the second main frame 72. The legs 73 are connected to the first main frame 71 or the second main frame 72 through the legs 73 connecting pieces. The legs 73 are connected to the legs 73 connecting pieces through adjusting bolts. Therefore, the height of the legs 73 can be changed by rotating the adjusting bolts, so that the horizontality and working height of the first main frame 71 or the second main frame 72 can be adjusted conveniently.

[0086] In one embodiment, a welding method is provided, which is applicable to the above-mentioned double-head laser synchronous welding device 100, and uses an integrated first laser welding head 11 and a second laser welding head 21 to simultaneously laser weld two parallel welds between a metal plate 80 and an edge plate 81 located at a welding position; the laser emitting part of the first laser welding head 11 and the laser emitting part of the second laser welding head 21 are arranged facing each other, and an empty position 82 between the two laser emitting parts forms a welding position.

[0087] During use of the above-mentioned welding method, the metal plate 80 to be welded is first placed between the first laser welding head 11 and the second laser welding head 21. More specifically, the metal plate 80 to be welded is horizontally placed in the neutral position 82 between the first laser welding head 11 and the second laser welding head 21, and then the edging plate 81 is attached to the side to be welded of the metal plate 80, and a gap to be welded is formed between the edging plate 81 and the side to be welded of the metal plate 80. At this time, the first laser welding head 11 and the second laser welding head 21 are respectively located on both sides of the gap to be welded, and the first laser welding head 11 and the second laser welding head 21 are started and moved at the same time, and finally two butt welds parallel to the guide rail 40 are formed, and the welding of the metal plate 80 and the edging plate 81 is completed. Since the laser emitting part of the first laser welding head 11 and the laser emitting part of the second laser welding head 21 are arranged opposite to each other, the two upper and lower or left and right gaps on the fitting sides between the metal plate 80 and the edging plate 81 can be welded synchronously at the same time, avoiding the process of flipping the metal plate 80 to weld the two gaps one by one, avoiding the loose connection between the metal plate 80 and the edging plate 81, resulting in misalignment of the second weld, and effectively improving the welding efficiency and weld quality.

[0088] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0089] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0090] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0092] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0093] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A double-head laser synchronous welding device, characterized in that: The invention comprises a guide rail (40), a bracket (30), and a first welding unit (10) and a second welding unit (20) arranged at two ends of the bracket (30); the bracket (30) is connected to and can move along the guide rail (40); the first welding unit (10) comprises a first laser welding head (11); the second welding unit (20) comprises a second laser welding head (21); the first laser welding head (11) and the second laser welding head (21) are symmetrically arranged on two sides of a gap to be welded; a laser emitting portion of the first laser welding head (11) and a laser emitting portion of the second laser welding head (21) are arranged facing each other; a neutral position (82) between the two laser emitting portions forms a welding position; It also includes a workpiece table (50), the workpiece table (50) is provided with a working surface for placing the metal plate (80), the workpiece table (50) is provided with at least two limiters (60), each limiter (60) includes a limit plate (61) and a moving mechanism (62), the moving mechanism (62) drives the limit plate (61) to be in a limit state and an open state; when in the limit state, the limit plate (61) fits the edge plate (81) and presses the edge plate (81) against one side of the metal plate (80); when in the open state, the limit plate (61) leaves the edge plate (81); The limiter (60) is located on one side of the guide rail (40) and is arranged along the direction of the guide rail (40); when the bracket (30) moves along the guide rail (40) to the position of one of the limiters (60), the limiter (60) can be converted from a limited state to an open state; The limiting plate (61) comprises a supporting portion (611) and a bonding portion (612) which are connected to each other. The supporting portion (611) is rotatably connected to the workpiece platform (50), and the moving mechanism (62) is rotatably connected to the supporting portion (611). When the limiting plate (61) is in a limiting state, the supporting portion (611) is used to support the edge wrapping plate (81), and the bonding portion (612) is located on a side of the edge wrapping plate (81) away from the metal plate (80) and abuts against the edge wrapping plate (81); when the limiting plate (61) is in an open state, the supporting portion (611) forms an angle with the working surface to prevent the limiting plate (61) from blocking the laser.

2. A double-head laser synchronous welding device according to claim 1, characterized in that: The first laser welding head (11) and the second laser welding head (21) are arranged vertically and symmetrically; Alternatively, the first laser welding head (11) and the second laser welding head (21) are arranged horizontally symmetrically.

3. A double-head laser synchronous welding device according to claim 1, characterized in that: The laser emitting portion of the first laser welding head (11) and the laser emitting portion of the second laser welding head (21) are arranged on the same line.

4. A double-head laser synchronous welding device according to claim 1, characterized in that: The first welding unit (10) comprises a first A-axis spacing adjustment mechanism (15), the first laser welding head (11) is connected to the bracket (30) via the first A-axis spacing adjustment mechanism (15), and the first laser welding head (11) can move in the A-axis direction so as to approach or move away from the second laser welding head (21), the A-axis direction being the direction in which the first laser welding head (11) and the second laser welding head (21) are arranged relative to each other.

5. A double-head laser synchronous welding device according to claim 4, characterized in that: The second welding unit (20) comprises a second A-axis spacing adjustment mechanism (25), the second laser welding head (21) is connected to the bracket (30) via the second A-axis spacing adjustment mechanism (25), and the second laser welding head (21) can move in the A-axis direction so as to approach or move away from the first laser welding head (11).

6. A double-head laser synchronous welding device according to claim 1, characterized in that: The first welding unit (10) comprises a first B-axis spacing adjustment mechanism (16), the first laser welding head (11) is connected to the bracket (30) via the first B-axis spacing adjustment mechanism (16), and the first laser welding head (11) can move in a B-axis direction so as to approach or move away from the bracket (30), the B-axis direction being the direction in which the first laser welding head (11) and the bracket (30) are arranged relative to each other.

7. A double-head laser synchronous welding device according to claim 6, characterized in that: The second welding unit (20) comprises a second B-axis spacing adjustment mechanism (26), the second laser welding head (21) is connected to the bracket (30) via the second B-axis spacing adjustment mechanism (26), and the second laser welding head (21) can move in the B-axis direction so as to approach or move away from the bracket (30).

8. The double-head laser synchronous welding device according to claim 1, characterized in that: A sensor is provided on one side of each limiter (60); when the sensor detects the bracket (30), the corresponding limiter (60) is converted from a limit state to an open state.

9. A welding method, characterized in that: The invention is applicable to a double-head laser synchronous welding device as claimed in any one of claims 1 to 8, wherein a first laser welding head (11) and a second laser welding head (21) are integrated to simultaneously laser weld two parallel welds between a metal plate (80) and an edge plate (81) located at a welding position; a laser emitting portion of the first laser welding head (11) and a laser emitting portion of the second laser welding head (21) are arranged opposite to each other, and a neutral position (82) between the two laser emitting portions forms a welding position; when the bracket (30) moves along the guide rail (40) to the position of one of the limiters (60), the limiter (60) is converted from a limit state to an open state; and the limiter plate (61) is prevented from blocking the laser.

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