An automatic exchange laser cutting machine

Abstract

The application discloses an automatic exchange laser cutting machine, which comprises a cutting workbench, feeding workbenches and discharging workbenches symmetrically arranged at two ends of the cutting workbench, and two or three machine beds. The feeding workbenches and the discharging workbenches are each provided with a lifting frame and multiple pairs of lifting devices, and the frame is provided with a first track and a first driving device on both sides. The cutting workbench comprises a supporting beam and a laser cutting device, the inner side of the supporting beam is provided with an upper layer station and a lower layer station, and the upper layer station and the lower layer station are respectively provided with a third track and an upper layer positioning cylinder and a second track and a lower layer positioning cylinder. The bottom of the machine bed can slide along the first track, the second track and the third track, the three tracks are of the same specification and are coplanar, and form a continuous moving path. The lifting device is used for adjusting the alignment of the first track and the second track or the third track, the positioning cylinder is used for fixing the machine bed, and the first driving device realizes automatic exchange of the machine bed between stations, so that the cutting efficiency and quality of the metal plate are improved.

Description

Technical Field

[0001] This application belongs to the field of laser cutting equipment technology, specifically relating to an automatic exchange laser cutting machine. Background Technology

[0002] Currently, in the field of plasma cutting of metal sheets, the cutting quality of existing technologies still has significant defects, making it difficult to meet the processing requirements of high-precision workpieces. At the same time, processing efficiency is also limited by auxiliary operation procedures. The specific problems are as follows:

[0003] (1) Excessive surface roughness of the cut: Due to the fluctuation of plasma arc stability and the splashing of molten metal during the cutting process, the surface roughness of the cut is prone to be large. Taking the cutting of a 10mm thick stainless steel plate as an example, the surface roughness of the cut is usually in the range of Ra25μm-Ra50μm; while for workpieces in fields such as aerospace and precision machinery that have high requirements for workpiece surface quality, the roughness requirement is generally Ra3.2μm-Ra6.3μm. The cut quality of the existing plasma cutting process is difficult to meet such requirements, and additional post-processing steps such as grinding and polishing are required, which increases the production cost.

[0004] (2) Slag residue at the cut is prominent: This problem is particularly noticeable in cutting thicker plates. For example, when cutting a 20mm thick carbon steel plate, a large amount of solidified slag will remain below the cut. This slag is tightly bonded to the base metal, requiring a lot of manpower and time for mechanical cleaning or chemical slag removal, which further prolongs the processing cycle and reduces the overall production efficiency.

[0005] (3) Low equipment operating efficiency: During the workpiece hoisting process, the existing processing flow requires pausing the operation of the plasma cutting equipment, restarting it after hoisting is completed, and adjusting the parameters. Frequent stop-start operations reduce the proportion of effective processing time of the equipment, making it difficult to improve the actual operating efficiency and adapt to the needs of large-scale and continuous production. Utility Model Content

[0006] This application provides an automatic exchange laser cutting machine, which effectively solves the problems of cutting quality and efficiency of metal sheets by setting up a loading worktable, a cutting worktable and an unloading worktable, as well as a bed that can be exchanged back and forth for workpiece transportation and cutting.

[0007] The technical solution to the technical problem solved in this application is as follows:

[0008] According to one aspect of this application, an automatic exchange laser cutting machine is provided, which includes a cutting worktable, a loading worktable and a unloading worktable disposed opposite each other at both ends of the cutting worktable and having the same structure, and two or three beds.

[0009] Both the loading workbench and the unloading workbench include a lifting frame and multiple pairs of lifting devices on both sides of the lifting frame. The lifting frame is provided with a corresponding first track and a first drive device on both sides.

[0010] The cutting workbench includes two parallel support beams and a laser cutting device that is movably mounted on the top of the two support beams via a second driving device. The two support beams are respectively provided with an upper station and a lower station on their inner sides. The upper station is provided with a corresponding third track and an upper positioning cylinder, and the lower station is provided with a corresponding second track and a lower positioning cylinder.

[0011] The bed includes a bed frame, and the inner side of the bed frame is provided with multiple arrow grid units;

[0012] The bottom of the bed frame is configured to slide on the first track, the second track, or the third track. The first track, the second track, and the third track on each side are of the same specification and are located in the same vertical plane, forming a continuous movement path for the bed.

[0013] The lifting devices of the loading worktable and the unloading worktable are used to drive the lifting frames of the two worktables to rise and fall, so that the first rails of the two worktables are selectively aligned with the second rail or the third rail of the cutting worktable; the lower positioning cylinder and the upper positioning cylinder are used to fix the bed on the second rail and the third rail, respectively.

[0014] The first drive device of the loading workbench is used to drive the bed on its first track to move to the third track, and to drive the bed on the second track to move to its first track;

[0015] The first drive device of the unloading workbench is used to drive the bed on its first track to move to the second track, and to drive the bed on the third track to move to its first track.

[0016] As a further improvement to the technical solution, the lifting device includes a support frame, on which a lifting device is vertically mounted, and the driving end of the lifting device is provided with a connecting cover, which is connected to the bed frame.

[0017] As a further improvement to the technical solution, the lifting device is a hydraulic cylinder, and the support frame is also equipped with a protective cover that is compatible with the connecting cover.

[0018] As a further improvement to the technical solution, multiple mounting brackets are fixedly installed at the bottom of the support beam.

[0019] As a further improvement to the technical solution, the cutting worktable also includes a waste trolley that is movably mounted at the bottom.

[0020] As a further improvement to the technical solution, the first driving device includes a driving wheel and a driven wheel located at both ends of one side of the lifting frame and connected by a transmission belt. The driving wheel is connected to a first motor, which is fixed to the lifting frame. A transmission wheel is provided on the side of the transmission belt. Each end of the bed frame of the bed is provided with a U-shaped transmission block adapted to the transmission wheel. The loading worktable drives the bed on its first track to move to the third track by placing the transmission wheel of the first driving device inside the corresponding U-shaped transmission block of the bed, and drives the bed on the second track to move in the opposite direction to its first track. The unloading worktable drives the bed on its first track to move to the second track by placing the transmission wheel of the first driving device inside the corresponding U-shaped transmission block of the bed, and drives the bed on the third track to move in the opposite direction to its first track.

[0021] As a further improvement to the technical solution, the second driving device includes a rack and a slide rail arranged parallel to the top of each of the support beams. The bottom of the laser cutting device is slidably mounted on the two slide rails via a slider. A second motor is installed at each end of the laser cutting device. A gear is provided at the output end of the second motor, and the gear meshes with the rack.

[0022] As a further improvement to the technical solution, both the first motor and the second motor are variable frequency motors.

[0023] As a further improvement to the technical solution, a controller is also included. A first height sensor and a second height sensor are respectively installed at the loading worktable and the unloading worktable. The first height sensor, the second height sensor, the first driving device, the second driving device, the laser cutting device, the upper positioning cylinder, the lower positioning cylinder, and the lifting device are respectively connected to the controller via lines.

[0024] As a further improvement to the technical solution, a first deceleration sensor and a first positioning sensor are respectively installed at the loading worktable and the unloading worktable, and a second deceleration sensor and a second positioning sensor are respectively installed on both sides of the cutting worktable. Each of the first deceleration sensor, the first positioning sensor, the second deceleration sensor, and the second positioning sensor is connected to the controller through a line.

[0025] Compared with the prior art, the automatic exchange laser cutting machine provided in this application has the following advantages:

[0026] (1) The structure of this application is novel, simple and reasonable. The laser cutting device set on the cutting worktable can cut metal plates, effectively ensuring the cutting quality, speed and effect.

[0027] (2) By setting up a loading worktable, a cutting worktable and a first track, a second track and a third track on the unloading worktable, the bed can be exchanged back and forth on the three worktables, which can effectively reduce human intervention in the loading and unloading of workpieces and the cutting process, improve the work efficiency and reduce safety risks.

[0028] (3) By setting up a controller and first and second height sensors to monitor the lifting height of the lifting device, this application facilitates the selective alignment of the first track on the loading and unloading worktable with the second and third tracks on the cutting worktable, thereby facilitating the bed to be driven back and forth on the three worktables by the first drive device.

[0029] (4) By setting up first and second deceleration sensors and first and second positioning sensors, this application facilitates precise positioning of the loading and unloading worktables on the three worktables when the bed is moved by the first drive device. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of an automatic exchange laser cutting machine according to this application;

[0031] Figure 2 This is a top view schematic diagram of an automatically exchanging laser cutting machine according to this application;

[0032] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 This is a partial schematic diagram of the loading workbench in this application;

[0034] Figure 5 This is a schematic diagram of the junction between the loading workbench and the cutting workbench in this application;

[0035] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0036] Figure 7 This is a schematic diagram of the junction between the material feeding workbench and the cutting workbench in this application;

[0037] Figure 8 This is a diagram showing the control relationship between the controller and its components in this application;

[0038] In the diagram: 100. Loading workbench; 11. Lifting frame; 12. Lifting device; 121. Support frame; 122. Lifting equipment; 123. Connecting cover; 124. Protective cover; 125. First height sensor; 126. Second height sensor; 13. First drive device; 131. First motor; 132. Drive wheel; 133. Driven wheel; 134. Transmission belt; 135. Transmission wheel; 15. First track; 161. First deceleration sensor; 162. First positioning sensor; 163. Second deceleration sensor. Sensor; 164, Second positioning sensor; 200, Cutting table; 21, Mounting bracket; 22, Support beam; 23, Laser cutting device; 24, Second drive device; 241, Second motor; 242, Rack; 243, Slide rail; 25, Second track; 26, Third track; 27, Scrap trolley; 28, Upper positioning cylinder; 29, Lower positioning cylinder; 300, Unloading table; 400, Bed; 41, Bed frame; 42, Arrow guard unit; 43, U-shaped transmission block; 500, Controller. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those of ordinary skill in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," "back," "inside," and "outside" used in the specification and claims of this patent application are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Any aspects not detailed in this application are well-known technologies to those skilled in the art.

[0040] Example 1:

[0041] Please see Figure 1-7 This application provides an automatic exchange laser cutting machine, which includes a loading worktable 100, a cutting worktable 200, an unloading worktable 300, and two or three beds 400. The loading worktable 100 and the unloading worktable 300 have the same structure and are arranged opposite each other at both ends of the cutting worktable 200.

[0042] Both the loading workbench 100 and the unloading workbench 300 include a rectangular lifting frame 11. Multiple pairs of lifting devices 12 are symmetrically arranged on both sides of the length direction of the lifting frame 11. Corresponding first tracks 15 and corresponding first drive devices 13 are also arranged on both sides of the length direction of the lifting frame 11.

[0043] The cutting worktable 200 is rectangular in shape and includes two parallel support beams 22. The tops of the two support beams 22 are equipped with laser cutting devices 23 for cutting workpieces via a second drive device 24. The two support beams 22 have upper and lower workstations on their inner sides, respectively. The upper workstation has a corresponding third track 26 and a number of corresponding upper positioning cylinders 28, and the lower workstation has a corresponding second track 25 and a number of corresponding lower positioning cylinders 29.

[0044] The bed 400 includes a rectangular bed frame 41 adapted to the inner side of the lifting frame 11. The inner side of the bed frame 41 is provided with a plurality of arrow grid units 42, which are used to support the workpiece.

[0045] The bottom of the bed frame 41 is configured to slide on the first track 15, the second track 25, or the third track 26. Taking three beds 400 as an example, the three beds 400 are respectively slidably mounted on the first track 15, the second track 25, or the third track 26 of the three worktables via the bottom of the bed frame 41. The first track 15, the second track 25, and the third track 26 on each side are of the same specification and are located in the same vertical plane, forming a continuous movement path for the bed 400.

[0046] The lifting devices 12 of the loading worktable 100 and the unloading worktable 300 are used to drive the lifting frames 11 of the two to rise and fall, so that the first rails 15 of the two can be selectively aligned with the second rail 25 or the third rail 26 of the cutting worktable 200; the lower positioning cylinder 29 and the upper positioning cylinder 28 are used to fix the bed 400 on the second rail 25 and the third rail 26, respectively, for cutting the workpiece on the bed 400 or fixing it before bed replacement.

[0047] The first drive unit 13 of the loading worktable 100 is used to drive the bed 400 on the first track 15 to move onto the third track 26 when the first track 15 is aligned with the third track 26, and to drive the bed 400 on the second track 25 to move onto the first track 15 when the first track 15 is aligned with the second track 26.

[0048] The first drive unit 13 of the unloading worktable 300 is used to drive the bed 400 on the first track 15 to move onto the second track 25 when the first track 15 is aligned with the second track 25, and to drive the bed 400 on the third track 26 to move onto the first track 15 when the first track 15 is aligned with the third track 26.

[0049] In a preferred embodiment, the lifting device 12 includes a support frame 121, on which a lifting device 122 is vertically mounted. The lifting device 122 is preferably a hydraulic cylinder, and the drive end of the lifting device 122 is provided with a connecting cover 123, which is connected to the bed frame 41. The support frame 121 is also provided with a protective cover 124 adapted to the connecting cover 123.

[0050] In a preferred embodiment, multiple mounting brackets 21 are fixedly provided at the bottom of the support beam 22 to facilitate the installation of the two support beams 22.

[0051] In a preferred embodiment, the cutting worktable 200 also includes a waste cart 27 that is movably disposed at the bottom, which facilitates the collection of waste during workpiece cutting.

[0052] In a preferred embodiment, the first driving device 13 includes a driving wheel 132 and a driven wheel 133 respectively disposed at both ends of one side of the lifting frame 11 and connected by a transmission belt 134. The driving wheel 132 is connected to a first motor 131, preferably a variable frequency motor. The first motor 131 is fixedly mounted on the lifting frame 11, and a transmission wheel 135 is disposed on the side of the transmission belt 134. The bed 400 has U-shaped transmission blocks 43 adapted to the transmission wheels 135 at both ends of each side of the bed frame 41. The loading worktable 100 connects the first driving device 132 to the bed frame 11. The drive wheel 135 of the first drive device 13 is placed inside the corresponding U-shaped drive block 43 of the bed 400 to drive the bed 400 on the first track 15 to move to the third track 26, and to drive the bed 400 on the second track 25 to move in the opposite direction to the first track 15; the unloading worktable 300 drives the bed 400 on the first track 15 to move to the second track 25 by placing the drive wheel 135 of the first drive device 13 inside the corresponding U-shaped drive block 43 of the bed 400, and to drive the bed 400 on the third track 26 to move in the opposite direction to the first track 15.

[0053] In a preferred embodiment, the second drive device 24 includes a rack 242 and a slide rail 243 arranged parallel to the top of each support beam 22. The bottom of the laser cutting device 23 is slidably mounted on the two slide rails 243 via a slider. A second motor 241 is installed at each end of the laser cutting device 23. The second motor 241 is preferably a variable frequency motor. A gear is provided at the output end of the second motor 241, and the gear meshes with the rack 242. When the second motor 241 drives the gear to move on the rack 242, it can drive the laser cutting device 24 to move along the length of the slide rail 243. When it moves to the position of the workpiece carried by the bed on the second track 25 or the third track 26, laser cutting can be performed by the laser cutting device 24.

[0054] The working process of an automatic exchange laser cutting machine described in this application is as follows:

[0055] During initial operation, the three beds 400 are respectively located on the first track 15 of the loading worktable 100, the first track 15 of the unloading worktable 300, and the second track 25 of the cutting worktable 200. The transmission wheels 135 of the first drive devices 13 of the loading worktable 100 and the unloading worktable 300 are respectively located in the corresponding U-shaped transmission blocks 43 of the lifting frame 41 of the bed 400 on their respective first tracks 15. The bed located on the second track 25 is positioned and fixed by the lower positioning cylinder 29.

[0056] First, the workpiece to be cut is hoisted onto the bed 400 on the loading worktable 100 using a gantry crane. The lifting frame 11 of the loading worktable 100 is raised by the lifting device 12. When its first track 15 aligns with the third track 26 of the cutting worktable 200, the lifting device 12 stops rising. Its first motor 131 drives the transmission belt 134 to move, and the transmission wheel 135 synchronously drives the bed 400 to move onto the third track 26. When the bed 400 moves to the designated position on the third track 26, its first motor 131 stops running, and the bed 400, which has moved from the loading worktable 100, is fixed by the upper positioning cylinder 28 of the cutting worktable 200. Then... The lifting device 12 of the loading worktable 100 causes the lifting frame 11 to descend. When its first track 15 is aligned with the second track 25 of the cutting worktable 200, the lifting device 12 stops descending. At this time, the transmission wheel 135 of the first drive device 13 of the loading worktable 100 descends into the corresponding U-shaped transmission block 43 of the lifting frame 41 of the bed 400 on the second track 25. The first motor 131 drives the transmission belt 134 to move in the opposite direction. The transmission wheel 135 synchronously drives the bed 400 above the second track 25 to move onto the first track 15 of the loading worktable 100. When the bed 400 moves to the designated position on the first track 15, the first motor 131 stops running.

[0057] After the upper positioning cylinder 28 of the cutting worktable 200 fixes the bed 400 that has moved from the loading worktable 100, the cutting worktable 200 drives the laser cutting device 23 to move to the workpiece position carried by the bed 400 on the third track 26 via the second drive device 24, and then performs the cutting operation.

[0058] After the workpiece is cut, the lifting frame 11 is raised or lowered by the lifting device 12 of the unloading worktable 300. When its first track 15 is aligned with the second track 25 of the cutting worktable 200, the lifting device 12 stops running. The first motor 131 drives the transmission belt 134 to move, and the transmission wheel 135 synchronously drives the empty bed 400 on it to move onto the second track 25. When the bed 400 moves to the designated position on the second track 25, the first motor 131 stops running and the lower positioning cylinder 29 of the cutting worktable 200 fixes the bed 400 that has moved from the unloading worktable 300. Then, the lifting device 12 of the unloading worktable 300 raises the lifting frame 11. When the workpiece is aligned with the third track 26 of the cutting worktable 200, the lifting device 12 stops rising. At this time, the transmission wheel 135 of the first drive device 13 of the unloading worktable 300 rises into the corresponding U-shaped transmission block 43 of the lifting frame 41 of the bed 400 on the third track 26. The upper positioning cylinder 28 of the cutting worktable 200 is released, and its first motor 131 drives the transmission belt 134 to move in the opposite direction. The transmission wheel 135 synchronously drives the bed 400 on the third track 26, which carries the cut workpiece, to move onto the first track 15 of the unloading worktable 300. When the bed 400 moves to the designated position on its first track 15, its first motor 131 stops running, and then the lifting device 12 lowers it to the designated position for unloading.

[0059] The bed can be exchanged and the workpiece can be cut continuously in the manner described above. The position of the bed 400 on the second track 25 and the third track 26 is determined by the position of the transmission wheel 135 in the first drive device 13 on the loading worktable 100 and the unloading worktable 300, which can move to the left and right ends of the cutting worktable 200. This ensures that when the two worktables rise or fall, their respective transmission wheels 135 can be accurately moved into the corresponding U-shaped transmission blocks 43 on both sides of the bed 400.

[0060] Example 2:

[0061] Please see Figure 1-8Based on Embodiment 1, in order to facilitate automated control, this application provides an automatic exchange laser cutting machine, which further includes a controller 500. A first height sensor 125 and a second height sensor 126 are respectively installed at the loading worktable 100 and the unloading worktable 300. The first height sensor 125, the second height sensor 126, the first drive device 13, the second drive device 24, the laser cutting device 23, the upper positioning cylinder 28, the lower positioning cylinder 29, and the lifting device 12 are respectively connected to the controller 500 through lines.

[0062] A first deceleration sensor 161 and a first positioning sensor 162 are respectively installed at the loading workbench 100 and the unloading workbench 300. A second deceleration sensor 163 and a second positioning sensor 164 are respectively installed on both sides of the cutting workbench 200. Each of the first deceleration sensor 161, the first positioning sensor 162, the second deceleration sensor 163, and the second positioning sensor 164 is connected to the controller 500 through a line.

[0063] In this embodiment, the controller 500 is used to receive feedback information from various components of the entire equipment and control the operation of various components. During operation, when the lifting devices 12 of the loading workbench 100 and the unloading workbench 300 control the lifting frame 11 to rise and fall, the controller 500 monitors the height position of the lifting frame 11 through the first height sensor 125 and the second height sensor 126 respectively, and controls the first track 15 on the lifting frame 11 to selectively align with the second track 25 or the third track 26 of the cutting workbench 200.

[0064] When the first drive device 13 of the loading worktable 100 drives the bed 400 on its first track 15 to move towards the third track 26 of the cutting worktable 200, the first drive device 13 can drive the bed 400 to run at high speed before the second deceleration sensor 163 detects the bed 400. When the second deceleration sensor 163 detects the bed 400, the first drive device 13 switches to low speed. When the second positioning sensor 164 detects the bed 400, the first drive device 13 is controlled to stop running. When the first drive device 13 of the loading worktable 100 drives the empty bed 400 on the second track 25 of the cutting worktable 200 to move towards its first track 15, the first drive device 13 can drive the bed 400 to run at high speed before the first deceleration sensor 161 detects the bed 400. When the first deceleration sensor 161 detects the bed 400, the first drive device 13 switches to low speed. When the first positioning sensor 162 detects the bed 400, the first drive device 13 is controlled to stop running. In this embodiment, the operation mode of the first drive device 13 of the unloading workbench 300 is the same as that of the first drive device 13 of the loading workbench 100, and will not be described again here.

Claims

1. An automatic laser cutting machine with interchangeable parts, characterized in that, It includes a cutting worktable (200), a loading worktable (100) and a unloading worktable (300) that are disposed opposite each other at both ends of the cutting worktable (200) and have the same structure, and two or three beds (400). The loading workbench (100) and unloading workbench (300) both include a lifting frame (11) and multiple pairs of lifting devices (12) on both sides of the lifting frame (11). The lifting frame (11) is provided with corresponding first rails (15) and first drive devices (13) on both sides. The cutting worktable (200) includes two parallel support beams (22) and a laser cutting device (23) that is movably mounted on the top of the two support beams (22) via a second drive device (24). The two support beams (22) are respectively provided with an upper station and a lower station on their inner sides. The upper station is provided with a corresponding third track (26) and an upper positioning cylinder (28), and the lower station is provided with a corresponding second track (25) and a lower positioning cylinder (29). The bed (400) includes a bed frame (41), and the inner side of the bed frame (41) is provided with a plurality of arrow guard units (42). Among them, the bottom of the bed frame (41) of the three bed bodies (400) is configured to be slidably mounted on the first track (15), the second track (25) or the third track (26). The first track (15), the second track (25) and the third track (26) on each side are of the same specification and are located in the same vertical plane, forming a continuous movement path of the bed body (400). The lifting devices (12) of the loading worktable (100) and unloading worktable (300) are respectively used to drive the lifting frames (11) of the two to lift, so that the first rails (15) of the two are selectively aligned with the second rail (25) or the third rail (26) of the cutting worktable (200); the lower positioning cylinder (29) and the upper positioning cylinder (28) are respectively used to fix the bed (400) on the second rail (25) and the third rail (26). The first drive device (13) of the loading workbench (100) is used to drive the bed (400) on its first track (15) to move onto the third track (26), and to drive the bed (400) on the second track (25) to move onto its first track (15); The first drive device (13) of the unloading worktable (300) is used to drive the bed (400) on its first track (15) to move onto the second track (25), and to drive the bed (400) on the third track (26) to move onto its first track (15).

2. The automatic exchange laser cutting machine according to claim 1, characterized in that, The lifting device (12) includes a support frame (121), on which a lifting device (122) is vertically mounted. The driving end of the lifting device (122) is provided with a connecting cover (123), which is connected to the bed frame (41).

3. The automatic exchange laser cutting machine according to claim 2, characterized in that, The lifting device (122) is a hydraulic cylinder, and the support frame (121) is also provided with a protective cover (124) that is compatible with the connecting cover (123).

4. The automatic exchange laser cutting machine according to claim 1, characterized in that, Multiple mounting brackets (21) are fixedly installed at the bottom of the support beam (22).

5. The automatic exchange laser cutting machine according to claim 1, characterized in that, The cutting worktable (200) also includes a waste cart (27) that is movably mounted at the bottom.

6. An automatic exchange laser cutting machine according to any one of claims 1-5, characterized in that, The first driving device (13) includes a driving wheel (132) and a driven wheel (133) located at both ends of one side of the lifting frame (11) and connected by a transmission belt (134). The driving wheel (132) is connected to a first motor (131), which is fixed to the lifting frame (11). A transmission wheel (135) is provided on the side of the transmission belt (134). The bed frame (41) of the bed (400) has U-shaped transmission blocks (43) at both ends of each side that are adapted to the transmission wheel (135). The loading worktable (100) is connected by placing the transmission wheel (135) of the first driving device (13) on the bed. The bed (400) drives the bed (400) on its first track (15) to move to the third track (26) through the inner side of the corresponding U-shaped transmission block (43), and drives the bed (400) on the second track (25) to move in the opposite direction to its first track (15); the unloading worktable (300) drives the bed (400) on its first track (15) to move to the second track (25) by placing the transmission wheel (135) of the first drive device (13) on the inner side of the bed (400) corresponding to the U-shaped transmission block (43), and drives the bed (400) on the third track (26) to move in the opposite direction to its first track (15).

7. The automatic exchange laser cutting machine according to claim 6, characterized in that, The second drive device (24) includes a rack (242) and a slide rail (243) arranged parallel to the top of each support beam (22). The bottom of the laser cutting device (23) is slidably mounted on the two slide rails (243) by a slider. A second motor (241) is installed at each end of the laser cutting device (23). A gear is provided at the output end of the second motor (241), and the gear meshes with the rack (242).

8. The automatic exchange laser cutting machine according to claim 7, characterized in that, Both the first motor (131) and the second motor (241) are variable frequency motors.

9. The automatic exchange laser cutting machine according to claim 1, characterized in that, It also includes a controller (500). A first height sensor (125) and a second height sensor (126) are respectively installed at the loading worktable (100) and the unloading worktable (300). The first height sensor (125), the second height sensor (126), the first drive device (13), the second drive device (24), the laser cutting device (23), the upper positioning cylinder (28), the lower positioning cylinder (29), and the lifting device (12) are respectively connected to the controller (500) through lines.

10. The automatic exchange laser cutting machine according to claim 9, characterized in that, The loading workbench (100) and unloading workbench (300) are each equipped with a first deceleration sensor (161) and a first positioning sensor (162), respectively. The cutting workbench (200) is equipped with a second deceleration sensor (163) and a second positioning sensor (164) on both sides. Each of the first deceleration sensor (161), the first positioning sensor (162), the second deceleration sensor (163), and the second positioning sensor (164) is connected to the controller (500) through a line.

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