Horizontal full-automatic AI laser welding equipment for towel rack

Abstract

Horizontal full-automatic AI laser welding equipment for towel racks comprises a rack, a conveying belt is arranged on the rack, a mounting frame is fixedly connected to the rack, a hydraulic cylinder is connected to the mounting frame, an output shaft of the hydraulic cylinder is connected with a lifting plate, a first electric base is arranged on the lifting plate in a sliding mode, and a second electric base is arranged at the bottom of the electric base in a sliding mode; the laser welding head is connected to the second electric base. A clamping assembly is connected to the rack. A laser welding head is endowed with a three-dimensional movement freedom degree, meanwhile, a towel rack is positioned and clamped through a first clamping plate and a second clamping plate, the second clamping plate is linked to push the towel rack to laterally move through lifting control of a lifting plate, each welding position is placed in a welding area, and a plate brush on the second clamping plate can forcibly clean a conveying belt after welding; lifting of the lifting plate further controls connection and disconnection of a power transmission channel from the motor to the conveying belt in a linkage mode.

Description

Technical Field

[0001] The present invention relates to the field of towel rack welding, and particularly to a horizontal full-automatic AI laser welding device for towel racks. Background Art

[0002] With the upgrading of consumption, towel racks are gradually moving towards high-end. The mid- to high-end home furnishing market has higher requirements for the quality and design sense of towel racks. Laser welding can create a "seamless" appearance and durability. The application prospect of laser welding technology in towel rack manufacturing is relatively broad, especially in terms of improving product quality, design flexibility, and production efficiency.

[0003] Although the application of laser welding in towel rack manufacturing has significant potential, there are still some technical difficulties in the actual implementation process, which need to be overcome through process optimization and equipment improvement. For example, the welding position on the towel rack is at the junction of the vertical rod and the horizontal rod. A towel rack generally consists of at least one vertical tube and multiple horizontal tubes connected thereto. Therefore, the welding positions are discontinuous. During the welding process, it is necessary to continuously adjust the position of the welding machine and / or the towel rack, and accurately identify the welding positions. At the same time, the weld seams present a spatial curve state in three-dimensional space, making the welding difficult. It is necessary to judge the welding state in real time. The development of AI technology provides a technical basis for real-time monitoring and guiding welding.

[0004] Based on the structural characteristics of the towel rack, the present invention provides a horizontal full-automatic AI laser welding device for towel racks, which can accurately move and position the towel rack section by section, and calibrate the position of the laser welding machine through vision, and sequentially complete the welding of the towel rack. Summary of the Invention

[0005] To solve the problems raised in the background art, the present invention provides a horizontal full-automatic AI laser welding device for towel racks, and the following further elaborates on the present invention.

[0006] A horizontal fully automatic AI laser welding device for a towel rack, comprising a frame. A conveyor belt is provided on the frame. An installation frame is fixedly connected to the frame. A hydraulic cylinder is connected to the installation frame. The output shaft of the hydraulic cylinder is connected to a lifting plate. A first electric seat is slidably arranged on the lifting plate. A second electric seat is slidably arranged at the bottom of the electric seat. A laser welding head is connected to the second electric seat. A clamping assembly is connected to the frame, including guiding side plates and brackets connected to both sides of the frame. A first guiding rod is slidably arranged on the guiding side plates. A first clamping plate is connected to the end of the first guiding rod. A first spring is sleeved outside the first guiding rod. The two ends of the first spring respectively contact the guiding side plate and the first clamping plate. A cantilever frame is connected to the bracket. A baffle is connected to the end of the cantilever frame. A second guiding rod is connected to the bracket. A rack is arranged above the second guiding rod. One end of the rack penetrates through the bracket and is then connected to a second clamping plate, and the other end is connected to an end cap. The end cap is slidably arranged on the second guiding rod. A second spring is sleeved on the second guiding rod. The two ends of the second spring respectively abut against the bracket and the end cap. The rack is controlled to move towards or away from the first clamping plate.

[0007] Furthermore, a rotating shaft is rotatably connected between the cantilever frames. A gear and a ratchet are key-connected to the rotating shaft. The gear and the ratchet are connected into a rotating whole. The gear meshes with the rack. A torsion spring sleeved outside the rotating shaft is connected between the gear and the cantilever frame. The lifting plate is connected with a second rack through a connecting rod. The second rack meshes with the ratchet. By controlling the lifting of the lifting plate, the lateral movement of the towel rack can be controlled, and the welding operation on both sides of the horizontal pipe on the towel rack can be completed in one lifting cycle. The rack, the gear, the ratchet and the second rack form a tooth system. The second rack only needs to rise a certain distance without disengaging from the ratchet, and the stroke of the rack can also meet the distance requirement of the lateral movement of the towel rack.

[0008] Furthermore, a brush plate is connected to the bottom of the second clamping plate. The brush plate contacts the conveyor belt. The function of the brush plate is to forcibly clean the spatter dropped during the welding process. At the same time, it can also increase the reset resistance, offset part of the elastic forces generated by the first spring, the second spring and the torsion spring, and slow down the reset speed of the towel rack.

[0009] Further, the input shaft of the conveyor belt is connected with a driven disk, a motor is connected to the frame, the output shaft of the motor is key-connected with a driving disk, the driving disk has an inner cavity, the output shaft of the motor is key-connected with the inner cavity, and a third spring is arranged in the inner cavity; a guiding beam is connected to the frame, an extension arm is further connected to the lifting plate, a column rod is slidably arranged on the extension arm, the column rod is slidably matched with the guiding beam, the bottom of the column rod is connected with a clutch member, the top is connected with a limit cap, and the limit cap and the extension arm are connected through a fourth spring; the clutch member includes a limit claw and a clutch claw, the clutch claw is located between the driven disk and the driving disk, and the limit claw is adapted to the input shaft. The lifting of the lifting plate controls the on-off of the power transmission channel of the motor to the conveyor belt. During welding, the conveyor belt is stationary. After welding is completed, the power transmission is restored, and the conveyor belt pushes the next welding cross tube of the towel rack forward to the welding area.

[0010] Beneficial effects: Compared with the prior art, the present invention endows the laser welding head with three-dimensional movement freedom. At the same time, the towel rack is positioned and clamped by the first clamping plate and the second clamping plate, and the lifting of the lifting plate controls the second clamping plate to push the towel rack to move laterally, so that each welding position is placed in the welding area. After welding, the brush on the second clamping plate can forcibly clean the conveyor belt; the lifting of the lifting plate controls the on-off of the power transmission channel of the motor to the conveyor belt. During welding, the conveyor belt is stationary. After welding is completed, the power transmission is restored, and the conveyor belt pushes the next welding cross tube of the towel rack forward to the welding area. Description of the Drawings

[0011] Figure 1 : Structural schematic diagram of the horizontal full-automatic laser welding equipment for towel racks of the present invention;

[0012] Figure 2 : Installation schematic diagram of the laser welding head on the mounting rack;

[0013] Figure 3 : Structural schematic diagram of the clamping assembly;

[0014] Figure 4 : Connection schematic diagram of the clamping assembly and the lifting plate;

[0015] Figure 5 : Figure 4 Enlarged schematic diagram of the structure at A in ;

[0016] Figure 6 : Connection structural schematic diagram of the rack, the second clamping plate and the brush;

[0017] Figure 7 : Structural schematic diagram of the power interruption assembly;

[0018] Figure 8 : Figure 7 Enlarged schematic diagram of the structure at B in ;

[0019] Figure 9 : Structural sectional view of the driven disk and the driving disk;

[0020] In the figure: frame 1, conveyor belt 2, mounting frame 3, laser welding head 4, hydraulic cylinder 5, lifting plate 6, first electric seat 7, second electric seat 8, guiding side plate 9, bracket 10, first guiding rod 11, first clamping plate 12, first spring 13, cantilever frame 14, baffle 15, second guiding rod 16, rack 17, second clamping plate 18, end cap 19, second spring 20, gear 21, ratchet 22, torsion spring 23, connecting rod 24, second rack 25, brush 26, input shaft 27, driven disk 28, motor 29, driving disk 30, inner cavity 301, third spring 31, guiding beam 32, extension arm 33, column rod 34, clutch member 35, limiting claw 351, clutch claw 352, limiting cap 36, fourth spring 37. Detailed implementation manner

[0021] Next, in combination with the attached Figures 1-9 A specific embodiment of the present invention will be elaborated in detail.

[0022] Refer to the attached Figure 1 , a horizontal fully automatic AI laser welding device for towel racks, including a frame 1, a conveyor belt 2 is provided on the frame 1, the towel racks to be laser welded are placed on the conveyor belt 2 and move therewith, and a mounting frame 3 is fixedly connected to the frame 1, a laser welding head 4 is connected to the mounting frame 3, and the laser welding head 4 has degrees of freedom of movement in three dimensions (x, y, z).

[0023] Refer to the attached Figure 2 , specifically, a hydraulic cylinder 5 is connected to the mounting frame 3, the output shaft of the hydraulic cylinder 5 is connected to a lifting plate 6, the lifting plate 6 performs a lifting action under the action of the hydraulic cylinder 5, a first electric seat 7 is slidably arranged on the lifting plate 6, the electric seat 7 can slide on the lifting plate 6, a second electric seat 8 is slidably arranged at the bottom of the first electric seat 7, the second electric seat 8 can slide at the bottom of the first electric seat 7, and the laser welding head 4 is connected to the second electric seat 8. The laser welding head 4 has a degree of freedom of movement in the y-axis direction under the action of the second electric seat 8, has a degree of freedom of movement in the x-axis direction under the action of the first electric seat 7, and has a degree of freedom of movement in the z-axis direction under the action of the hydraulic cylinder 5, thereby enabling the laser welding head 4 to have degrees of freedom of movement in three dimensions.

[0024] Refer to the attached Figure 1 and Figures 2-4, a clamping assembly is connected to the frame 1 for clamping and positioning a towel rack during laser welding, including guiding side plates 9 and brackets 10 connected to both sides of the frame 1; a first guiding rod 11 is slidably arranged on the guiding side plate 9, and a first clamping plate 12 is connected to the end of the first guiding rod 11. A first spring 13 is sleeved outside the first guiding rod 11, and both ends of the first spring 13 are respectively in contact with the guiding side plate 9 and the first clamping plate 12; a cantilever frame 14 is connected to the bracket 10, a baffle 15 is connected to the end of the cantilever frame 14, a second guiding rod 16 is connected to the bracket 10, a rack 17 is arranged above the second guiding rod 16, one end of the rack 17 penetrates through the bracket 10 and then is connected to a second clamping plate 18, and the other end is connected to an end cap 19. The end cap 19 is slidably arranged on the second guiding rod 16, and a second spring 20 is sleeved on the second guiding rod 16. Both ends of the second spring 20 respectively abut against the bracket 10 and the end cap 19, and the rack 17 is controlled to move towards or away from the first clamping plate.

[0025] In the initial state, the second clamping plate 18 is closely attached to the baffle 15 under the elastic force of the second spring 20. The first guiding rod 11 is controlled to retract, and the first spring 13 is in a compressed state, so that the first clamping plate 12 and the second clamping plate 18 are in a separated state. The towel rack to be welded travels to between the first clamping plate 12 and the second clamping plate 18 along with the conveyor belt 2, and then the first guiding rod 11 is released. The first clamping plate 12 clamps the towel rack between it and the second clamping plate 18 under the reset action of the first spring 13, realizing the positioning of the towel rack, and then laser welding can be carried out.

[0026] During welding, the first part to be welded is the welding position on the towel rack close to the first clamping plate 12. At this time, the position of the laser welding head 4 is approximately at the center of the conveyor belt. Machine vision can obtain the image during the welding of the current laser welding head 4. Most towel racks are symmetric structures, and the welding positions are generally two symmetric positions (the connection between the horizontal pipe and the two vertical pipes on both sides). After welding one position, the rack 17 is controlled to move towards the first clamping plate 12. The first clamping plate 12 and the second clamping plate 18 clamp the towel rack and move it laterally, moving the welding position away from the first clamping plate 12 to a position close to the center of the conveyor belt and within the field of view of the machine vision. According to the different sizes of different towel racks, this solution aims to reduce the position adjustment range of the laser welding head 4, and try to locate the welding operation position at the center of the conveyor belt and within the field of view of the machine vision.

[0027] Refer to the appendix Figures 4-5, the rack 17 is controlled to move toward or away from the first clamping plate. The present embodiment adopts the following technical scheme to realize control: a rotating shaft is rotatably connected between the cantilever frames 14, a gear 21 and a ratchet 22 are keyed on the rotating shaft, the gear 21 and the ratchet 22 are connected to form a rotating whole through a pin, the gear 21 is meshed with the rack 17, a torsion spring 23 sleeved on the rotating shaft is connected between the gear 21 and the cantilever frame 14; the lifting plate 6 is connected to a second rack 25 through a connecting rod 24, and the second rack 25 is meshed with the ratchet 22.

[0028] When the towel rack is just clamped and positioned, the hydraulic cylinder 5 drives the laser welding head 4 and the second rack 25 to descend. Due to the one-way rotation characteristics of the ratchet 22, there is no meshing transmission between the second rack 25 and the ratchet 22. When the laser welding head 4 descends from the initial height to the welding height, the welding of the first connection between the horizontal pipe and the vertical pipe begins. After the welding is completed, the hydraulic cylinder 5 drives the laser welding head 4 and the second rack 25 to rise. At this time, the second rack 25 drives the ratchet 22 to rotate, and then drives the gear 21 to rotate, and then the rack 17 extends forward, and the first clamping plate 12 and the second clamping plate 18 clamp the towel rack away from the bracket 10 and move a distance and then stop, and then the laser welding head 4 continues to descend to the welding height to perform laser welding on the other connection.

[0029] It should be noted that the rack 17, the gear 21, the ratchet 22 and the second rack 25 constitute a tooth system. By designing the number of teeth, when the second rack 25 descends a small distance, the forward extension distance of the rack 17 can be enlarged. In this way, in the process of welding the same horizontal tube and its two sides in succession, the second rack 25 only needs to rise a certain distance without being separated from the ratchet. The stroke of the rack 17 can also meet the distance requirement of the lateral movement of the towel rack.

[0030] After the welding of the two ends of the same horizontal tube is completed, it is necessary to release the clamping of the towel rack and allow the towel rack to move forward with the conveyor belt for a distance, generally the interval between adjacent horizontal tubes, and the towel rack needs to be reset. In this embodiment, after the welding of the two ends of the same horizontal tube is completed, the hydraulic cylinder 5 is actuated to drive the laser welding head 4 to rise to the initial height. It should be noted that during the welding process, the ratchet 22 and the second rack 25 are always engaged. After the welding is completed, the second rack 25 is controlled to rise. During the rising process, the ratchet is first driven to continue to rotate, and the towel rack is linked to continue to move a distance away from the bracket 10 until the ratchet 22 and the second rack 25 are disengaged. After disengagement, the towel rack will be reset under the elastic force of the first spring 13, the second spring 20 and the torsion spring 23 until the second clamping plate 18 is against the cantilever frame 14. After the ratchet 22 and the second rack 25 are disengaged, the second rack 25 will continue to rise to the initial height.

[0031] In the laser welding scenario of towel racks, the weld at the joint of the horizontal tube and the vertical tube presents a spatial curve. During the welding process, the welding point needs to be monitored and feedback controlled in real time. This embodiment introduces AI technology, obtains workpiece point cloud data through 3D visual scanning of machine vision, and uses generative adversarial networks (GAN) to automatically generate collision-free welding paths to guide laser welding heads. The deployed machine vision collects molten pool images, identifies abnormal fluctuations through convolutional neural networks (CNN), and compares the standard molten pool feature library in real time to trigger alarms or adaptive compensation to detect the stability of the molten pool and avoid the generation of pores and cracks.

[0032] Reference Figure 6 , laser welding usually does not produce obvious welding slag in the manufacturing process of towel racks, but there are exceptions, such as material contamination, coating carbonization or parameter out of control, which may generate trace spatter, but it is also easy to handle. In this embodiment, a brush 26 is connected to the bottom of the second clamping plate 18, and the brush 26 is in contact with the conveyor belt. Spatter is essentially molten or semi-molten metal particles, whose temperature is usually close to or slightly lower than the melting point of the base material, and will be embedded in the surface of the conveyor belt. The function of the brush 26 is to forcibly clean the spatter dropped during the welding process.

[0033] During the welding process, as mentioned above, when welding the same horizontal tube, after the welding on one side is completed, the second clamping plate 18 will push the towel rack to the side, and the brush 26 will be close to the welding area. After the second welding is completed, the towel rack is reset. During the reset process, the second rack 25 is controlled to rise and first drives the ratchet to continue to rotate, and the towel rack is linked to continue to move a distance away from the bracket 10. At this time, the brush 26 will sweep the welding area. When the ratchet 22 and the second rack 25 are disengaged, the second clamping plate 18 is reset and retreated, and the brush 26 will sweep the welding area again to complete the forced cleaning of the welding area.

[0034] It is particularly important to note that the brush 26 is in close contact with the surface of the conveyor belt 2. Its function is, on the one hand, to forcefully clean the welding area on the surface of the conveyor belt, and on the other hand, to increase the resetting resistance. During the resetting and retreating process of the second clamping plate 18, the resistance partially offsets the elastic force generated by the first spring 13, the second spring 20 and the torsion spring 23, thereby slowing down the resetting speed of the towel rack.

[0035] During the welding process, the conveyor belt 2 is preferably in a stationary state. According to common sense, the conveyor belt has a slow transmission speed to avoid relative sliding between the towel rack and the conveyor belt during the transmission process. Based on this, in this embodiment, a power blocking component is used to isolate the power source of the conveyor belt to avoid frequent starting of the motor.

[0036] Reference Figures 7-9Specifically, the power blocking assembly includes a driven disk 28 connected to the input shaft 27 of the conveyor belt 2, a motor 29 is connected to the frame 1, the output shaft of the motor 29 is key-connected to the active disk 30, the active disk 30 has an inner cavity 301, the output shaft of the motor 29 is key-connected to the inner cavity 301, and a third spring 31 is provided in the inner cavity 301; a guide beam 32 is connected to the frame 1, and an extension arm 33 is also connected to the lifting plate 6, a column 34 is slidably provided on the extension arm 33, the column 34 is slidably matched with the guide beam 32, a clutch 35 is connected to the bottom of the column 34, and a limiting cap 36 is connected to the top, and the limiting cap 36 is connected to the extension arm 33 through a fourth spring 37; the clutch 35 includes a limiting claw 351 and a clutch claw 352, the clutch claw 352 is located between the driven disk 28 and the active disk 30, and the limiting claw 351 is adapted to the input shaft 27.

[0037] During the welding process of a horizontal tube, that is, when the lifting plate 6 is working at the initial height and at any height below the initial height, the extension arm 33 slides on the column rod 34 and stretches the fourth spring 37, the limiting claw 351 is pressed tightly on the input shaft 27, and the clutch claw 352 squeezes the driven disk 28 and the active disk 30, so that the rotational power of the continuously rotating active disk 30 cannot be transmitted to the conveyor belt, and the third spring 31 is in a compressed state. After welding is completed, the first guide rod 11 is pulled back to release the towel rack. After the lifting plate 6 is reset to the initial height, it continues to rise to the power height. During the rising process, the extension arm 33 rises accordingly, and the limit cap 36 is pushed up by the fourth spring, thereby causing the column rod 34 to move up, and the clutch claw 352 is separated from the extrusion surface of the driven disk 28 and the active disk 30. The active disk 30 is tightly attached to the driven disk 28 under the action of the third spring 31, and the driven disk 28 is driven to rotate by the friction force, thereby causing the conveyor belt 2 to move slowly, and the next welding horizontal pipe of the towel rack is pushed forward to the welding area, and the next welding operation is carried out.

[0038] The present invention endows the laser welding head with three-dimensional freedom of movement, and simultaneously positions and clamps the towel rack through the first clamping plate and the second clamping plate, and pushes the towel rack sideways through the lifting and lowering control linkage of the lifting plate, so that each welding position is placed in the welding area, and the brush on the second clamping plate can forcibly clean the conveyor belt after welding; the lifting and lowering linkage control motor of the lifting plate switches on and off the power transmission channel to the conveyor belt, and the conveyor belt is stationary during welding. After welding is completed, the power transmission is restored, and the conveyor belt pushes the next welding horizontal pipe of the towel rack forward to the welding area.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A horizontal fully automatic AI laser welding device for a towel rack, comprising a frame (1), a conveyor belt (2) is arranged on the frame (1), an installation frame (3) is fixedly connected to the frame (1), a hydraulic cylinder (5) is connected to the installation frame (3), an output shaft of the hydraulic cylinder (5) is connected to a lifting plate (6), a first electric seat (7) is slidably arranged on the lifting plate (6), a second electric seat (8) is slidably arranged at the bottom of the electric seat (7), and a laser welding head (4) is connected to the second electric seat (8); characterized in that: A clamping assembly is connected to the frame (1), including guiding side plates (9) and brackets (10) connected to both sides of the frame (1), a first guiding rod (11) is slidably arranged on the guiding side plates (9), a first clamping plate (12) is connected to an end of the first guiding rod (11), a first spring (13) is sleeved outside the first guiding rod (11), and two ends of the first spring (13) respectively contact the guiding side plates (9) and the first clamping plate (12); a cantilever frame (14) is connected to the bracket (10), a baffle (15) is connected to an end of the cantilever frame (14), a second guiding rod (16) is connected to the bracket (10), a rack (17) is arranged above the second guiding rod (16), one end of the rack (17) penetrates through the bracket (10) and then is connected to a second clamping plate (18), and the other end is connected to an end cap (19), the end cap (19) is slidably arranged on the second guiding rod (16), a second spring (20) is sleeved on the second guiding rod (16), two ends of the second spring (20) respectively abut against the bracket (10) and the end cap (19), and the rack (17) is controlled to move towards or away from the first clamping plate.

2. The horizontal full-automatic AI laser welding equipment for towel racks according to claim 1, wherein: A rotating shaft is rotatably connected between the cantilever frames (14), a gear (21) and a ratchet wheel (22) are key-connected to the rotating shaft, the gear (21) and the ratchet wheel (22) are connected into a rotating whole, the gear (21) meshes with the rack (17), and a torsion spring (23) sleeved outside the rotating shaft is connected between the gear (21) and the cantilever frame (14); the lifting plate (6) is connected to a second rack (25) through a connecting rod (24), and the second rack (25) meshes with the ratchet wheel (22).

3. The horizontal fully automatic AI laser welding equipment for towel racks according to claim 2, wherein: A brush (26) is connected to the bottom of the second clamping plate (18), and the brush (26) contacts the conveyor belt.

4. The horizontal fully automatic AI laser welding equipment for towel racks according to claim 3, characterized in that: The input shaft (27) of the conveyor belt (2) is connected with a driven disk (28), a motor (29) is connected to the frame (1), the output shaft of the motor (29) is key-connected with a driving disk (30), there is an inner cavity (301) in the driving disk (30), the output shaft of the motor (29) is key-connected with the inner cavity (301), and a third spring (31) is arranged in the inner cavity (301); a guiding beam (32) is connected to the frame (1), an extension arm (33) is further connected to the lifting plate (6), a column rod (34) is slidably arranged on the extension arm (33), the column rod (34) is slidably matched with the guiding beam (32), a clutch part (35) is connected to the bottom of the column rod (34), a limiting cap (36) is connected to the top, and the limiting cap (36) is connected with the extension arm (33) through a fourth spring (37); the clutch part (35) includes a limiting claw (351) and a clutch claw (352), the clutch claw (352) is located between the driven disk (28) and the driving disk (30), and the limiting claw (351) is adapted to the input shaft (27).

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