Intelligent laser welding device for precise butt joint of fireproof bridge side plate and bottom plate thin plate and welding method thereof

Abstract

The present application relates to the field of fireproof bridge welding, in particular to a kind of intelligent laser welding device and welding method for precise butt joint of fireproof bridge side plate and bottom plate sheet, including pedestal, movablely arranged on pedestal for fixing bottom plate clamping seat and two groups of welding modules respectively located at both sides of clamping seat;Welding module includes: fixed on pedestal and opposite two vertical arms and first transverse arm, second transverse arm between two vertical arms, multiple sets of clamping structures are provided on second transverse arm along the length direction;Movablely arranged on pedestal and below bottom plate laser welding head;By setting multiple sets of clamping structures along the length direction of second transverse arm, side plate can effectively improve the stability of side plate and bottom plate butt joint based on lever principle, effectively guarantee the consistency of weld, improve subsequent welding effect and product strength and sealing, improve the process stability of intelligent heat treatment production line, provide protection for the capacity of intelligent heat treatment production line.

Description

Technical Field

[0001] This invention relates to the field of fireproof cable tray welding, specifically to an intelligent laser welding device and welding method for precise butt welding of thin plates between the side and bottom plates of a fireproof cable tray. Background Technology

[0002] As a core component of modern building electrical safety, fireproof cable trays are undergoing a manufacturing process that is evolving from traditional methods to automated production dominated by intelligent welding systems. Traditional fireproof cable trays are typically made of hot-dip galvanized steel or stainless steel. These materials have high yield strength and high springback, and are prone to defects such as cracks and dimensional deviations when bent in one piece. Therefore, in actual production, a three-piece split structure of "double side plates + bottom plate" is often used, which is formed by laser welding.

[0003] Existing automated laser welding equipment, as an intelligent welding system, typically uses fixtures to splice the side plates and the base plate. During splicing, it is inconvenient to set fixtures at the bottom of the side plates, which can easily interfere with subsequent laser welding. If the fixtures only act on both ends of the side plates, the number of fixtures is limited. Since the side plates have a large span in the length direction, uneven contact between different parts of the side plates and the base plate can easily occur. If multiple fixtures are set along the length of the top of the side plates, only a small part of the side plates will contact the side of the base plate in the height direction, which can easily lead to low splicing stability.

[0004] Both of these splicing methods can easily lead to poor weld consistency, resulting in poor subsequent welding effects, such as incomplete welding, uneven penetration, and excessive heat-affected zone. This not only directly affects the product's strength and sealing performance, but also increases the processing difficulty and energy consumption of the subsequent intelligent heat treatment production line, reduces the process stability of the intelligent heat treatment production line, and consequently affects the production capacity of the intelligent heat treatment production line. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent laser welding device and welding method for precise butt welding of the side plate and bottom plate of a fireproof cable tray, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A smart laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates includes a base, a clamping seat movably mounted on the base for fixing the bottom plate, and two sets of welding modules located on both sides of the clamping seat.

[0008] The welding module includes:

[0009] Two vertical arms fixed to the base and opposite to each other, and a first horizontal arm and a second horizontal arm located between the two vertical arms. The second horizontal arm is provided with a multi-assembly clamping structure along the length direction.

[0010] The laser welding head is mounted on the base and located below the bottom plate. The laser welding head can be driven by the transverse mechanism mounted on the base to move along the length of the cable tray. The first transverse arm can rise relative to the two vertical arms and drive the laser welding head to rise and approach the weld between the bottom plate and the side plate.

[0011] The clamping structure includes an assembly arm that is slidably connected to the second cross arm and a movable arm that is rotatably mounted on the side of the assembly arm via a pivot pin. One end of the movable arm is provided with a pneumatic clamping component for clamping the top of the side plate, and the other end cooperates with an elastic mechanism provided on the assembly arm. The elastic mechanism is triggered after the first cross arm rises, releasing elastic potential energy and cooperating with the movable arm.

[0012] Before the laser welding head approaches the weld between the base plate and the side plate, the assembly arm can be driven by a pneumatic component on the second cross arm to move along the width direction of the base so that the side plate and the base plate can be mated.

[0013] The intelligent laser welding device for precise butt welding of the fireproof cable tray side plate and the bottom plate as described above: the pneumatic component includes a second cylinder rotatably mounted on the second cross arm, and the movable end of the second cylinder is hinged to the assembly arm;

[0014] The two ends of the first horizontal arm are slidably connected to the two vertical arms respectively, and a third cylinder is rotatably mounted on the base, with the movable end of the third cylinder hinged to the first horizontal arm.

[0015] The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates as described above: the assembly arm is provided with a guide groove, and the elastic mechanism includes a driven block slidably disposed in the guide groove, a guide shaft fixed in the guide groove, and a first spring sleeved on the outer periphery of the guide shaft. The two ends of the first spring are respectively connected to the inner wall of the guide groove and the driven block.

[0016] The driven block is connected to the movable arm via a rolling force transmission component and also cooperates with a limiting component provided on the assembly arm. The limiting component is connected to the first cross arm.

[0017] The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates as described above: the rolling force transmission component includes a drive wheel mounted on the driven block and located on the side of the assembly arm facing the movable arm, the end of the movable arm away from the pneumatic clamping member is provided with a first inclined surface, and the drive wheel abuts against the first inclined surface.

[0018] The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates as described above: the limiting component includes two guide arms slidably disposed on the assembly arm, a driven arm fixed to the two guide arms, and a transmission block slidably fitted on the driven arm. The transmission block is fixedly connected to the first cross arm through a connecting arm.

[0019] The driven block is further provided with a driven wheel on its side, and the driven arm is provided with a vertical surface and a second inclined surface connected at one end away from the guide arm, and the driven wheel abuts against the vertical surface.

[0020] The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and base plates as described above: the transverse mechanism includes a linear drive module mounted on the base and a transverse seat provided on the linear drive module, and a follower arm is fixed on the transverse seat. The linear drive module can drive the transverse seat and the follower arm to move along the length direction of the base.

[0021] The first cross arm is provided with a sliding groove, in which a slider is slidably fitted. The slider is fixedly connected to a follower plate. The laser welding head is installed at the end of the follower plate away from the slider. The follower arm passes through the follower plate and is slidably connected to the follower plate.

[0022] The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and base plates as described above: the follower arm is also provided with an abutment wheel on the side facing the clamping seat. The abutment wheel is flush with the base plate and is connected to two sets of sliding clearance components on the follower arm. The sliding clearance components are triggered when the first cross arm rises, which can cause the abutment wheel to apply pressure to the side plate.

[0023] The intelligent laser welding device for precise butt joint of fireproof cable tray side plates and base plates as described above: the sliding clearance component includes a transmission plate slidably disposed on the side of the follower arm, the transmission plate is connected to the abutment wheel through an elastic element, and the transmission plate is inclinedly provided with a through groove, the side of the follower plate is fixedly provided with a drive column, the drive column passes through the through groove and is slidably connected to the transmission plate, when the follower plate drives the laser welding head to rise, the drive column can cause the transmission plate to move relative to the follower arm toward the side plate through the through groove.

[0024] The intelligent laser welding device for precise butt welding of the side plate and bottom plate of the fireproof cable tray as described above: the elastic element includes a crossbar that is slidably connected to the transmission plate and a second spring sleeved on the outer periphery of the crossbar. A mounting block is fixed at one end of the crossbar facing the clamping seat. The abutting wheel is mounted on the mounting block. One end of the second spring is connected to the mounting block and the other end is connected to the transmission plate.

[0025] A laser welding method for fireproof cable trays, employing an intelligent laser welding device for precise butt welding of the side and bottom thin plates of the fireproof cable tray, includes the following steps:

[0026] Step 1: Fix the base plate to the clamping seat and clamp the side plate using multiple pneumatic clamping components;

[0027] Step 2: The assembly arm slides relative to the second cross arm to complete the docking of the side plate and the bottom plate;

[0028] Step 3: The first horizontal arm rises, causing the laser welding head to lift up and approach the weld seam between the bottom plate and the side plate. The elastic mechanism is triggered, cooperating with the movable arm, and the abutment wheel applies pressure to the position where the side plate and the bottom plate meet.

[0029] Step four: The transverse mechanism operates, driving the laser welding head and the abutment wheel to move synchronously along the length of the cable tray.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] This invention avoids the problem of uneven welds caused by clamping both ends of the side plate due to the large span in the length direction of the side plate by setting up a multi-assembly clamping structure along the length direction of the second horizontal arm. When the first horizontal arm rises, causing the laser welding head to rise and approach the weld between the bottom plate and the side plate, the limiting component can release the limiting state of the driven block. Under the elastic support of the first spring, the movable arm and the side plate have a swing tendency. Thus, the side plate can effectively improve the stability of the docking between the side plate and the bottom plate based on the lever principle, effectively ensuring the consistency of the weld, improving the subsequent welding effect, product strength and sealing, improving the process stability of the intelligent heat treatment production line, and providing a guarantee for the production capacity of the intelligent heat treatment production line.

[0032] Secondly, an abutment wheel is provided. When the first cross arm drives the laser welding head to rise and approach the weld seam between the bottom plate and the side plate, the abutment wheel can contact the side plate, and the second spring is compressed, so that the abutment wheel can apply pressure to the position where the side plate and the bottom plate meet. During the welding process, the abutment wheel can move synchronously with the laser welding head, thus further ensuring the consistency of the weld seam and improving the effect of laser welding. Attached Figure Description

[0033] Figure 1 A schematic diagram of one embodiment of an intelligent laser welding device for precise joining of thin plates between the side and bottom plates of a fireproof cable tray.

[0034] Figure 2 This is a schematic diagram of another aspect of an embodiment of an intelligent laser welding device for precise joining of the side plates and bottom plates of a fireproof cable tray.

[0035] Figure 3A side view of one embodiment of an intelligent laser welding device for precise joining of the side and bottom thin plates of a fireproof cable tray.

[0036] Figure 4 for Figure 2 Enlarged view of the structure at point A in the middle.

[0037] Figure 5 for Figure 3 Enlarged view of the structure at point B in the middle.

[0038] Figure 6 This is a schematic diagram of the clamping base in one embodiment of an intelligent laser welding device for precise butt welding of the side plate and bottom plate of a fireproof cable tray.

[0039] Figure 7 This is a schematic diagram of the distribution of multiple assembly clamp structures in one embodiment of an intelligent laser welding device for precise butt welding of the side plates and bottom plates of a fireproof cable tray.

[0040] Figure 8 for Figure 7 A structural diagram from another angle.

[0041] Figure 9 This is a schematic diagram of the transverse movement mechanism in one embodiment of an intelligent laser welding device for precise butt welding of the side and bottom thin plates of a fireproof cable tray.

[0042] Figure 10 This is a schematic diagram of the clamping structure in one embodiment of an intelligent laser welding device for precise butt welding of the side and bottom thin plates of a fireproof cable tray.

[0043] Figure 11 for Figure 10 A structural diagram from another angle.

[0044] Figure 12 An exploded view of the clamping structure in one embodiment of an intelligent laser welding device for precise butt welding of the side and bottom thin plates of a fireproof cable tray.

[0045] In the diagram: 1. Base; 101. Slide rail; 2. Vertical arm; 3. First cylinder; 4. Clamping seat; 5. First horizontal arm; 6. Second horizontal arm; 7. Assembly arm; 701. Shaft pin; 702. Guide shaft; 8. Movable arm; 801. First inclined surface; 9. Pneumatic clamping component; 10. First spring; 11. Driven block; 12. Drive wheel; 13. Guide arm; 14. Driven arm; 1401. Vertical surface; 1402. Second inclined surface ; 15. Transmission block; 16. Driven wheel; 17. Connecting arm; 18. Second cylinder; 19. Third cylinder; 20. Linear drive module; 21. Transverse seat; 2101. Follower arm; 2102. Guide frame; 22. Follower plate; 2201. Drive column; 23. Laser welding head; 24. Slider; 25. Transmission plate; 2501. Through slot; 26. Mounting block; 27. Crossbar; 28. Abutment wheel; 29. ​​Second spring. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0048] Please see Figures 1-12 In this embodiment, an intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates includes a base 1, a clamping seat 4 movably mounted on the base 1 for fixing the bottom plate, and two sets of welding modules located on both sides of the clamping seat 4.

[0049] The welding module includes:

[0050] Two upright arms 2 fixed on the base 1 and opposite to each other, and a first horizontal arm 5 and a second horizontal arm 6 disposed between the two upright arms 2. The second horizontal arm 6 is provided with a multi-assembly clamping structure along the length direction.

[0051] The laser welding head 23 is mounted on the base 1 and located below the bottom plate. The laser welding head 23 can be driven by the transverse mechanism mounted on the base 1 to move along the length of the cable tray. The first transverse arm 5 can rise relative to the two vertical arms 2 and drive the laser welding head 23 to rise and approach the weld between the bottom plate and the side plate.

[0052] The clamping structure includes an assembly arm 7 that is slidably connected to the second cross arm 6 and a movable arm 8 that is rotatably mounted on the side of the assembly arm 7 via a shaft pin 701. One end of the movable arm 8 is provided with a pneumatic clamping member 9 for clamping the top of the side plate, and the other end cooperates with an elastic mechanism provided on the assembly arm 7. The elastic mechanism is triggered after the first cross arm 5 rises, releasing elastic potential energy and cooperating with the movable arm 8.

[0053] Before the laser welding head 23 approaches the weld between the base plate and the side plate, the assembly arm 7 can be driven by a pneumatic component on the second cross arm 6 to move along the width direction of the base 1 so that the side plate and the base plate are mated.

[0054] In this embodiment, it should be noted that the pneumatic clamping member 9 is an application of existing technology, namely a clamping cylinder. During the welding operation, the side plate is fed in from one end of the base 1, passes through multiple pneumatic clamping members 9, and then the multiple pneumatic clamping members 9 clamp the top of the side plate.

[0055] Secondly, a slide rail 101 is provided on the base 1, and the clamping seat 4 is slidably disposed on the slide rail 101. A plurality of first cylinders 3 are also rotatably mounted on the base 1. The movable end of the first cylinder 3 is hinged to the clamping seat 4. During operation, the base plate is placed on the clamping seat 4 and centered and fixed (the base plate can be fixed by negative pressure suction; this application does not specifically limit the fixing method). The first cylinder 3 can drive the clamping seat 4 to move along the length direction of the base 1, thereby ensuring that the base plate is aligned with the two side plates. In addition, the clamping seat 4 can also be equipped with a lifting function, so that the position of the base plate can be easily adjusted during actual welding work, ensuring the accuracy of the docking between the base plate and the side plates. This application will not elaborate further on this.

[0056] As a further embodiment of the present invention, please refer again. Figure 8 The pneumatic component includes a second cylinder 18 rotatably mounted on the second cross arm 6, the movable end of the second cylinder 18 being hinged to the assembly arm 7; the two ends of the first cross arm 5 are respectively slidably connected to the two vertical arms 2; a third cylinder 19 is rotatably mounted on the base 1, the movable end of the third cylinder 19 being hinged to the first cross arm 5.

[0057] In this embodiment, after the pneumatic clamping member 9 has finished clamping the top of the side plate, the movable end of the second cylinder 18 is shortened, which can drive the assembly arm 7 to slide relative to the second cross arm 6, so that the side plate can move toward the bottom plate and dock with the bottom plate.

[0058] After the assembly is completed, the movable end of the third cylinder 19 extends, which drives the first horizontal arm 5 to rise relative to the vertical arm 2. Then, the laser welding head 23 is raised and brought close to the weld between the bottom plate and the side plate, so that the transverse mechanism can work and drive the laser welding head 23 to move along the weld to start the welding process.

[0059] As a further embodiment of the present invention, please refer again. Figure 10 The assembly arm 7 is provided with a guide groove. The elastic mechanism includes a driven block 11 slidably disposed in the guide groove, a guide shaft 702 fixed in the guide groove, and a first spring 10 sleeved on the outer periphery of the guide shaft 702. The two ends of the first spring 10 are respectively connected to the inner wall of the guide groove and the driven block 11. The driven block 11 is connected to the movable arm 8 through a rolling force transmission component and also cooperates with a limiting component disposed on the assembly arm 7. The limiting component is connected to the first cross arm 5.

[0060] The rolling force transmission assembly includes a drive wheel 12 mounted on the driven block 11 and located on the side of the assembly arm 7 facing the movable arm 8. The movable arm 8 has a first inclined surface 801 at one end away from the pneumatic clamping member 9, and the drive wheel 12 abuts against the first inclined surface 801.

[0061] In this embodiment, with attachment Figure 5 Taking the state shown as an example, at this time, the limiting component limits the driven block 11, and the first spring 10 is in a compressed state. It should be emphasized that the end of the assembly arm 7 on which the pneumatic clamping member 9 is installed is heavier. Therefore, under the action of gravity, the first inclined surface 801 and the drive wheel 12 remain in contact and the movable arm 8 remains in a horizontal state, ensuring that after the side plate is clamped by the pneumatic clamping member 9, the side plate can maintain a stable vertical state.

[0062] As the first horizontal arm 5 rises, causing the laser welding head 23 to lift and approach the weld seam between the base plate and the side plate, the first horizontal arm 5 can trigger the limiting component to release the limiting of the driven block 11. Then, the first spring 10 can apply a rebound force to the driven block 11, and the drive wheel 12 acts on the first inclined surface 801, causing the movable arm 8 to have a clockwise swing tendency (note that since the side plate and the base plate have been connected at this time, the movable arm 8 will not swing). Thus, the first spring 10 can play a supporting role, effectively improving the stability of the connection between the side plate and the base plate during the welding process.

[0063] As a further embodiment of the present invention, please refer again. Figure 11 and Figure 12 The limiting assembly includes two guide arms 13 slidably disposed on the assembly arm 7, a driven arm 14 fixed to the two guide arms 13, and a transmission block 15 slidably fitted on the driven arm 14. The transmission block 15 is fixedly connected to the first cross arm 5 through a connecting arm 17. The driven block 11 is also provided with a driven wheel 16 on its side. The driven arm 14 is provided with a vertical surface 1401 and a second inclined surface 1402 connected at one end away from the guide arm 13. The driven wheel 16 abuts against the vertical surface 1401.

[0064] In this embodiment, with attachment Figure 11 Taking the state shown as an example, the vertical surface 1401 limits the driven wheel 16 and the driven block 11, so that the first spring 10 cannot provide elastic support and transmit force before the side plate and the bottom plate are connected, thus avoiding the situation where the side plate is tilted after the pneumatic clamping member 9 clamps the side plate due to the displacement of the movable arm 8.

[0065] When the side plate and the bottom plate are docked, the second cylinder 18 is activated, causing the assembly arm 7 to slide relative to the second cross arm 6 until the side plate contacts the bottom plate. During this process, the driven arm 14 slides relative to the transmission block 15.

[0066] Subsequently, the first horizontal arm 5 rises, driving the connecting arm 17, the transmission block 15, the driven arm 14, and the guide arm 13 to rise. Correspondingly, the driven wheel 16 disengages from the vertical surface 1401 (but the driven wheel 16 does not contact the second inclined surface 1402). The vertical surface 1401 releases the restriction on the driven wheel 16 and the driven block 11. Thus, the first spring 10 can provide elastic force, causing the drive wheel 12 to exert force on the first inclined surface 801, causing the movable arm 8 to have a swaying tendency.

[0067] To address this issue, the present invention employs a multi-clamping structure along the length of the second horizontal arm 6. This avoids the problem of uneven welds caused by clamping both ends of the side plate due to the large span along its length. Specifically, when the first horizontal arm 5 rises, causing the laser welding head 23 to lift and approach the weld between the base plate and the side plate, the limiting component releases its restraint on the driven block 11. Under the elastic support of the first spring 10, the movable arm 8 and the side plate exhibit a tendency to sway. Thus, based on the lever principle, the stability of the side plate's connection with the base plate is effectively improved, ensuring weld consistency, enhancing subsequent welding effects, product strength and sealing, and improving the process stability of the intelligent heat treatment production line. This provides a guarantee for the production capacity of the intelligent heat treatment production line.

[0068] As a further embodiment of the present invention, please refer again. Figure 4 and Figure 7 The transverse mechanism includes a linear drive module 20 mounted on the base 1 and a transverse base 21 mounted on the linear drive module 20. A follower arm 2101 is fixed on the transverse base 21. The linear drive module 20 can drive the transverse base 21 and the follower arm 2101 to move along the length direction of the base 1. The first transverse arm 5 is provided with a sliding groove, in which a slider 24 is slidably fitted. The slider 24 is fixedly connected to a follower plate 22. The laser welding head 23 is mounted on the end of the follower plate 22 away from the slider 24. The follower arm 2101 passes through the follower plate 22 and is slidably connected to the follower plate 22.

[0069] It should be noted that the linear drive module 20 is an application of existing technology. It is based on the lead screw and servo motor drive and is used to drive the transverse moving seat 21 to move the follower plate 22 and the laser welding head 23 along the length direction of the base 1 through the follower arm 2101 during the welding process.

[0070] In this embodiment, during operation, the assembly arm 7 is driven by the second cylinder 18, so that the side plate and the bottom plate are docked. Then, the linear drive module 20 works to drive the transverse shift seat 21 and the follower arm 2101 to move along the length direction of the base 1. Correspondingly, the slider 24 slides relative to the first transverse arm 5 along the length direction of the first transverse arm 5. The follower plate 22 drives the laser welding head 23 to move along the weld seam to weld the side plate and the bottom plate.

[0071] During the upward movement of the first horizontal arm 5, the first horizontal arm 5 can drive the follower plate 22 and the laser welding head 23 to rise through the slider 24;

[0072] Furthermore, in actual work, two additional laser welding heads 23 can be set on the base 1 for welding the weld seams on the inner side of the cable tray.

[0073] As a further embodiment of the present invention, please refer again. Figure 4 , Figure 5 as well as Figure 9 The follower arm 2101 is also provided with an abutment wheel 28 on the side facing the clamping seat 4. The abutment wheel 28 is flush with the base plate and is connected to two sets of sliding clearance components on the follower arm 2101. The sliding clearance components are triggered when the first cross arm 5 rises, which can cause the abutment wheel 28 to apply pressure to the side plate. The sliding clearance components include a transmission plate 25 slidably disposed on the side of the follower arm 2101. The transmission plate 25 is connected to the abutment wheel 28 through an elastic element, and a through groove 2501 is inclinedly disposed on the transmission plate 25. A drive column 2201 is fixedly disposed on the side of the follower plate 22. The drive column 2201 passes through the through groove 2501 and is slidably connected to the transmission plate 25. When the follower plate 22 drives the laser welding head 23 to rise, the drive column 2201 can cause the transmission plate 25 to move relative to the follower arm 2101 toward the side plate through the through groove 2501.

[0074] In detail, the transmission plate 25 is U-shaped, and a guide frame 2102 is fixedly provided on the side of the follower arm 2101 for sliding guidance of the transmission plate 25.

[0075] The elastic element includes a crossbar 27 slidably connected to the transmission plate 25 and a second spring 29 sleeved on the outer periphery of the crossbar 27. A mounting block 26 is fixed to one end of the crossbar 27 facing the clamping seat 4. The abutting wheel 28 is mounted on the mounting block 26. One end of the second spring 29 is connected to the mounting block 26, and the other end is connected to the transmission plate 25.

[0076] In this embodiment, the first cross arm 5 drives the follower plate 22 and the laser welding head 23 to lift up, so that when the laser welding head 23 approaches the weld between the side plate and the bottom plate, the drive column 2201 will slide with the transmission plate 25 through the through groove 2501, causing the transmission plate 25 to give way. The transmission plate 25 slides relative to the follower arm 2101 toward the side plate. Correspondingly, during this process, the abutting wheel 28, which is flush with the bottom plate, first contacts the side plate. Then, the transmission plate 25 slides relative to the cross bar 27, so that the second spring 29 is compressed. Thus, the abutting wheel 28 can apply pressure to the position where the side plate and the bottom plate meet.

[0077] It should be emphasized that, in the width direction of the base 1, the abutment wheel 28 is aligned with the laser welding head 23. During the welding process, when the laser welding head 23 moves along the length direction of the base 1, the abutment wheel 28 rolls along the side of the side plate.

[0078] Therefore, by setting up the abutment wheel 28, when the first cross arm 5 drives the laser welding head 23 to rise and approach the weld between the bottom plate and the side plate, the abutment wheel 28 can contact the side plate, and the second spring 29 is compressed, so that the abutment wheel 28 can apply pressure to the position where the side plate and the bottom plate are joined. During the welding process, the abutment wheel 28 can move synchronously with the laser welding head 23, thus further ensuring the consistency of the weld and improving the effect of laser welding.

[0079] A laser welding method for fireproof cable trays, employing an intelligent laser welding device for precise butt welding of the side and bottom thin plates of the fireproof cable tray, includes the following steps:

[0080] Step 1: Fix the base plate to the clamping seat 4, and clamp the side plate with multiple pneumatic clamping parts 9;

[0081] Step 2: The assembly arm 7 slides relative to the second cross arm 6, so that the side plate and the bottom plate are connected.

[0082] Step 3: The first horizontal arm 5 rises, causing the laser welding head 23 to lift up and approach the weld seam between the bottom plate and the side plate. The elastic mechanism is triggered and cooperates with the movable arm 8. The abutment wheel 28 applies pressure to the position where the side plate and the bottom plate meet.

[0083] Step four: The transverse mechanism operates, driving the laser welding head 23 and the abutment wheel 28 to move synchronously along the length of the cable tray.

[0084] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates, comprising a base, a clamping seat movably mounted on the base for fixing the bottom plate, and two sets of welding modules located on both sides of the clamping seat. Its features are, The welding module includes: Two vertical arms fixed to the base and opposite to each other, and a first horizontal arm and a second horizontal arm located between the two vertical arms. The second horizontal arm is provided with a multi-assembly clamping structure along the length direction. The laser welding head is mounted on the base and located below the bottom plate. The laser welding head can be driven by the transverse mechanism mounted on the base to move along the length of the cable tray. The first transverse arm can rise relative to the two vertical arms and drive the laser welding head to rise and approach the weld between the bottom plate and the side plate. The clamping structure includes an assembly arm that is slidably connected to the second cross arm and a movable arm that is rotatably mounted on the side of the assembly arm via a pivot pin. One end of the movable arm is provided with a pneumatic clamping component for clamping the top of the side plate, and the other end cooperates with an elastic mechanism provided on the assembly arm. The elastic mechanism is triggered after the first cross arm rises, releasing elastic potential energy and cooperating with the movable arm. Before the laser welding head approaches the weld between the base plate and the side plate, the assembly arm can be driven by a pneumatic component on the second cross arm to move along the width direction of the base so that the side plate and the base plate can be mated.

2. The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates according to claim 1, characterized in that, The pneumatic component includes a second cylinder rotatably mounted on the second cross arm, the movable end of the second cylinder being hinged to the assembly arm; The two ends of the first horizontal arm are slidably connected to the two vertical arms respectively, and a third cylinder is rotatably mounted on the base, with the movable end of the third cylinder hinged to the first horizontal arm.

3. The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates according to claim 1, characterized in that, The assembly arm is provided with a guide groove, and the elastic mechanism includes a driven block slidably disposed in the guide groove, a guide shaft fixed in the guide groove, and a first spring sleeved on the outer periphery of the guide shaft. The two ends of the first spring are respectively connected to the inner wall of the guide groove and the driven block. The driven block is connected to the movable arm via a rolling force transmission component and also cooperates with a limiting component provided on the assembly arm. The limiting component is connected to the first cross arm.

4. The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates according to claim 3, characterized in that, The rolling force transmission assembly includes a drive wheel mounted on the driven block and located on the side of the assembly arm facing the movable arm. The end of the movable arm away from the pneumatic clamp is provided with a first inclined surface, and the drive wheel abuts against the first inclined surface.

5. The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates according to claim 4, characterized in that, The limiting assembly includes two guide arms slidably disposed on the assembly arm, a driven arm fixed to the two guide arms, and a transmission block slidably fitted on the driven arm. The transmission block is fixedly connected to the first cross arm through a connecting arm. The driven block is further provided with a driven wheel on its side, and the driven arm is provided with a vertical surface and a second inclined surface connected at one end away from the guide arm, and the driven wheel abuts against the vertical surface.

6. The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates according to claim 1, characterized in that, The lateral movement mechanism includes a linear drive module mounted on the base and a lateral movement seat disposed on the linear drive module, and a follower arm is fixed on the lateral movement seat. The linear drive module can drive the lateral movement seat and the follower arm to move along the length direction of the base. The first cross arm is provided with a sliding groove, in which a slider is slidably fitted. The slider is fixedly connected to a follower plate. The laser welding head is installed at the end of the follower plate away from the slider. The follower arm passes through the follower plate and is slidably connected to the follower plate.

7. The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates according to claim 6, characterized in that, The follower arm is also provided with an abutment wheel on the side facing the clamping seat. The abutment wheel is flush with the base plate and is connected to two sets of sliding clearance components on the follower arm. The sliding clearance components are triggered when the first cross arm rises, which can cause the abutment wheel to apply pressure to the side plate.

8. The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates according to claim 7, characterized in that, The sliding clearance assembly includes a transmission plate slidably disposed on the side of the follower arm. The transmission plate is connected to the abutment wheel through an elastic element, and a through groove is inclinedly provided on the transmission plate. A drive column is fixedly provided on the side of the follower plate. The drive column passes through the through groove and is slidably connected to the transmission plate. When the follower plate drives the laser welding head to rise, the drive column can cause the transmission plate to move relative to the follower arm toward the side plate through the through groove.

9. The intelligent laser welding device for precise butt welding of fireproof cable tray side plates and bottom plates according to claim 8, characterized in that, The elastic element includes a crossbar slidably connected to the transmission plate and a second spring sleeved on the outer periphery of the crossbar. A mounting block is fixed to one end of the crossbar facing the clamping seat. The abutting wheel is mounted on the mounting block. One end of the second spring is connected to the mounting block, and the other end is connected to the transmission plate.

10. A laser welding method for fireproof cable trays, employing an intelligent laser welding device for precise butt welding of the side and bottom thin plates of a fireproof cable tray as described in any one of claims 7-9, characterized in that... Includes the following steps: Step 1: Fix the base plate to the clamping seat and clamp the side plate using multiple pneumatic clamping components; Step 2: The assembly arm slides relative to the second cross arm to complete the docking of the side plate and the bottom plate; Step 3: The first horizontal arm rises, causing the laser welding head to lift up and approach the weld seam between the bottom plate and the side plate. The elastic mechanism is triggered, cooperating with the movable arm, and the abutment wheel applies pressure to the position where the side plate and the bottom plate meet. Step four: The transverse mechanism operates, driving the laser welding head and the abutment wheel to move synchronously along the length of the cable tray.

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