Laser cutting device with distance regulation and control mechanism

Abstract

The invention relates to the technical field of laser cutting machines, and provides a laser cutting device with a distance regulation and control mechanism, which comprises a moving seat and a cutting head, and further comprises a focus heightening part, a printing heightening part, a range finder, a camera and a feeding part, the focus heightening part is arranged on the moving seat and used for adjusting the height of the cutting head, and the printing heightening part is arranged on the moving seat and used for adjusting the height of the cutting head. The printing height adjusting component is arranged on the workbench and used for adjusting the height of a plastic plate, the distance measuring instrument is arranged on the moving seat and used for measuring the height of a workpiece or the plastic plate, the camera is arranged on the moving seat and used for shooting printing marks, and the feeding component is used for conveying the plastic plate to the printing height adjusting component. The feeding component comprises a storage box and a first electric cylinder, the storage box is arranged on the workbench, a discharging port is formed in the bottom of the storage box, and the first electric cylinder is arranged on the storage box. By means of the technical scheme, the problem that in the prior art, placing, recycling and adjusting of plastic plates are complex, and consequently the cutting efficiency is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting machines, and in particular to a laser cutting device with a distance regulating mechanism. Background Art

[0002] The laser cutting machine focuses the laser emitted from the laser into a high-power density laser beam through the optical path system. The laser beam irradiates the surface of the workpiece, causing the workpiece to reach its melting point or boiling point. At the same time, the high-pressure gas coaxial with the beam blows away the molten or vaporized metal. As the relative position of the beam and the workpiece moves, a cut is eventually formed in the material, thereby achieving the purpose of cutting.

[0003] During the cutting process of the laser cutting machine, the light beam is focused into a very small focus by the lens of the cutting head, so that the focus reaches a high power density. Due to manufacturing costs and other reasons, the laser beams emitted by civilian laser generators have a certain divergence angle and are "conical". When the height of the "cone" changes (equivalent to the change of the optical path length of the laser cutting machine), the cross-sectional area of ​​the beam on the surface of the focusing lens also changes. In addition, light also has the nature of waves, so diffraction will inevitably occur. Diffraction will cause the light beam to expand laterally during propagation. Due to the "conical" shape of the Gaussian beam and the diffraction effect of the light wave, when the optical path length changes, the diameter of the beam acting on the lens surface changes all the time, which will cause changes in the size and depth of the focus. If the size and depth of the focus change during continuous processing, it will inevitably have a great impact on the processing, for example, it will cause inconsistent cutting seam widths, and the plate will not be cut through or ablated at the same cutting power. Therefore, the focal length of the laser needs to be adjusted.

[0004] In industrial production, three methods are generally used to determine the focal position, namely the printing method, the inclined plate method and the blue spark method. The printing method is to move the cutting head from top to bottom and print the laser beam on the plastic plate. The point with the smallest print diameter is the focus. The printing method is used to adjust the focus position. In actual use, a plastic plate that matches the height of the workpiece is required to adjust and process the focus position to match the workpiece. The height of the plastic plate needs to be accurately adjusted, and the plastic plate needs to be recycled after printing. In the prior art, the placement and recycling of plastic plates usually require manual operation. The plastic plate is below the laser cutting knife, which is dangerous. When placing the plastic plate, the height of the plastic plate needs to be repeatedly adjusted and confirmed. The height adjustment process is relatively cumbersome, resulting in low laser cutting efficiency. Summary of the invention

[0005] The present invention provides a laser cutting device with a distance control mechanism, which solves the problem in the prior art that the placement, recovery and adjustment of plastic plates are relatively complicated, resulting in low cutting efficiency.

[0006] The technical solution of the present invention is as follows: A laser cutting device with a distance control mechanism comprises a moving seat and a cutting head, wherein the moving seat is arranged on a working table of the laser cutting machine, and further comprises: A focus height adjustment component, which is arranged on the movable seat and is used to adjust the height of the cutting head. The focus height adjustment component includes: Motor 1, wherein the motor 1 is arranged on the moving base; A reducer, wherein the reducer is arranged on the moving seat, and an input end of the reducer is arranged at an output end of the motor 1; A driving gear, the driving gear being arranged at an output end of the reducer; A driven gear, the driven gear is rotatably disposed on the moving seat, and the driven gear is meshed with the driving gear; A height adjustment screw rod, wherein the height adjustment screw rod is arranged on the cutting head, an adjusting nut matching the height adjustment screw rod is arranged on the driven gear, and a through hole for the height adjustment screw rod to pass through is opened on the movable seat; A printing height adjustment component, which is arranged on the workbench and is used to adjust the height of the plastic plate, and includes: An adjusting block, wherein two adjusting blocks are provided, the two adjusting blocks move relative to each other, the adjusting block contacts the bottom of the plastic plate, the top of the adjusting block is inclined, and the ends of the two adjusting blocks that are close to each other are the lower ends; A limiting frame, which can be lifted and lowered on the workbench, and is in contact with the plastic plate; A distance meter, which is arranged on the moving seat and is used to measure the height of the workpiece or the plastic plate; A camera, which is arranged on the movable base and is used to photograph the printing traces; A feeding component, which is used to transport the plastic plate to the print height adjustment component, and includes: A material storage box, the material storage box is arranged on the workbench, and a material discharge port is opened at the bottom of the material storage box; An electric cylinder 1 is arranged on the material storage box, and an output end of the electric cylinder 1 extends into the interior of the material storage box and contacts with a plastic plate located at the bottom.

[0007] In order to improve the stability of the plastic plate, a pressing component is also included, and the pressing component includes: A support frame, wherein the support frame is arranged on the workbench; A lifting plate, the lifting plate can be lifted and lowered on the supporting frame; A pressing plate is arranged at the bottom of the lifting plate through a plurality of springs and a plurality of telescopic rods, and the pressing plate contacts the top of the plastic plate.

[0008] In order to realize the synchronous lifting of the pressing plate and the plastic plate, a driving component is also included, and the driving component is used to drive the adjusting block and the lifting plate to move. The driving component includes: A bidirectional screw, wherein the bidirectional screw is rotatably arranged on the workbench, and the two adjusting blocks are symmetrically arranged outside the bidirectional screw, and the two adjusting blocks are respectively threadedly matched with two external threads of the bidirectional screw; A driving screw, which is rotatably arranged on the top of the lifting plate and is connected to the bidirectional screw through a transmission member; The transmission member comprises: A driving bevel gear, wherein both ends of the bidirectional screw are provided with driving rods, and the driving bevel gear is fixedly sleeved on the outside of the driving rod; Transmission bevel gear 1, a transmission rod 1 is rotatably arranged on the support frame, two transmission bevel gears 1 are arranged, and the two transmission bevel gears 1 are respectively fixedly arranged at the two ends of the transmission rod 1, and the transmission bevel gear 1 located at the bottom is meshed with the driving bevel gear; Transmission bevel gear 2, a transmission rod 2 is rotatably arranged on the support frame, and two transmission bevel gears 2 are arranged, and the two transmission bevel gears 2 are respectively fixedly arranged at two ends of the transmission rod 2, and the transmission bevel gear 1 away from the driving gear is meshed with one of the transmission bevel gears 2; A driven bevel gear is rotatably arranged on the support frame, the driven bevel gear is meshed with the transmission bevel gear 2 which is far away from the transmission bevel gear 1, a driving nut which is adapted to the driving screw is arranged on the driven bevel gear, and a through hole for the driving screw to pass through is opened on the support frame.

[0009] In order to cool down and recycle the printed plastic plate, a cooling component is also included, and the cooling component includes: A cooling plate, the cooling plate can be raised and lowered on the movable seat, the bottom of the cooling plate is in contact with the plastic plate, a cooling cavity is provided inside the cooling plate, a plurality of air outlets are provided at the bottom of the cooling plate, and the air outlets are connected to the cooling cavity; A gas storage bottle is arranged on the workbench, and the gas storage bottle is connected to the cooling chamber.

[0010] The working principle and beneficial effects of the present invention are: 1. In the present invention, the two adjusting blocks can be driven to move relative to each other by the bidirectional screw, and the plastic plate moves along the inclined surface of the adjusting blocks. The two adjusting blocks approach each other to push the plastic plate to move upward, and the two adjusting blocks move away from each other to move the plastic plate downward, so as to adjust the height of the plastic plate. The cutting head and the rangefinder are driven to move by the moving seat, and the rangefinder measures the height of the workpiece, and then measures the height of the plastic plate, so that the height of the plastic plate is the same as the height of the workpiece, ensuring that the focus is adjusted by printing on the plastic plate, and the height of the focus is adapted to the height of the workpiece.

[0011] 2. In the present invention, the cutting head is driven to move above the plastic plate by the moving seat, and the cutting head emits laser. At the same time, the motor 1 and the reducer drive the driven gear to rotate, so that the height adjustment screw drives the cutting head to rise and fall slowly. At the same time, the cutting head moves slowly to print lines on the plastic plate. The line image is photographed by the camera and the image is transmitted to the processor. The processor determines the position where the line diameter is thinnest, which is the focus position, and drives the cutting head to rise and fall to the height corresponding to the focus, so as to adjust the focus height.

[0012] 3. In the present invention, when the bidirectional screw drives the adjusting block to move, the driven bevel gear is driven to rotate through the transmission action of the transmission member, thereby driving the driving screw to rise and fall. When the adjusting blocks are close to each other and the plastic plate rises, the driving screw rises, causing the pressure plate and the plastic plate to rise and fall at the same time. Under the action of the spring, the pressure plate presses the plastic plate against the top of the adjusting block to ensure the stability and levelness of the plastic plate.

[0013] 4. In the present invention, after the focus adjustment is completed, the adjusting block is driven to move by the bidirectional screw pump so that the printed plastic plate is flush with the height of the discharge port, and the electric cylinder pushes the plastic plate in the storage box toward the adjusting block, pushing the printed plastic plate out from between the adjusting block and the pressure plate, and the new plastic plate moves from the inside of the storage box to between the adjusting block and the pressure plate, preparing for subsequent focus adjustment.

[0014] 5. In the present invention, the cutting head and the cooling assembly are driven to move by the movable seat, and the cooling plate is lowered to contact with the printed plastic plate. The cooling plate is driven to move by the movable seat to push the plastic plate to the edge of the workbench. At the same time, the low-temperature gas in the gas storage bottle is transported to the inside of the cooling plate, and the plastic plate is cooled through the air outlet, so as to facilitate the subsequent collection of the plastic plate.

[0015] 6. Therefore, compared with the prior art method of manually placing, adjusting and recovering the plastic plate, the present invention pushes the plastic plate to move between the adjustment block and the pressure plate through the electric cylinder 1, and pushes the printed plastic plate away from the printing position at the same time, and adjusts the distance between the two adjustment blocks through the rotation of the bidirectional screw, drives the plastic plate to rise and fall, and cooperates with the rangefinder to make the height of the plastic plate and the height of the workpiece adapt to each other, and fine-tunes the height of the cutting head through the cooperation of the motor 1, the reducer, the driving gear, the driven gear and the height adjustment screw, and the cutting head performs laser printing on the plastic plate. The camera transmits the printed line image to the processor, and the processor confirms the thinnest position of the line, which is the focus position, and adjusts the cutting head to the focus corresponding position through the motor 1, and cools the printed plastic plate through the cooling plate. At the same time, the plastic plate can be pushed to the edge of the workbench by the movement of the movable seat, which is convenient for the recovery of the plastic plate, and the adjustment efficiency of laser cutting is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a structural schematic diagram of the first viewing angle of the present invention; Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention; Figure 3 It is a structural schematic diagram of the focus height adjustment component, the rangefinder and the first viewing angle of the camera of the present invention; Figure 4 It is a structural schematic diagram of the focus height adjustment component, the rangefinder and the second viewing angle of the camera of the present invention; Figure 5 It is a schematic diagram of the structure of the printing height adjustment component, the pressing component and the driving component of the present invention.

[0018] In the figure: 1. Mobile seat; 2. Cutting head; 3. Workbench; 4. Rangefinder; 5. Camera; 101. Motor 1; 102. Speed ​​reducer; 103. Driving gear; 104. Driven gear; 105. Heightening screw; 201, adjusting block; 202, limiting frame; 203, electric cylinder 2; 301, material storage box; 302, electric cylinder 1; 401, support frame; 402, lifting plate; 403, pressing plate; 501, bidirectional screw; 502, driving screw; 503, motor 2; 601, driving bevel gear; 602, transmission bevel gear 1; 603, transmission bevel gear 2; 604, driven bevel gear; 605, driving rod; 606, transmission rod 1; 607, transmission rod 2; 701. Cooling plate; 702. Gas cylinder; 703. Electric cylinder three. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 5 As shown, this embodiment proposes a laser cutting device with a distance control mechanism, including a moving seat 1 and a cutting head 2, the moving seat 1 is arranged on a workbench 3 of a laser cutting machine, the workbench 3 is provided with mechanical components for enabling the moving seat 1 to move along the X-axis and the Y-axis, and is also equipped with a numerical control system to control the X-axis and Y-axis movement of the moving seat 1 and the output power of the cutting head 2, which is a prior art known to those skilled in the art and will not be described in detail herein, and also includes a focus height adjustment component, a print height adjustment component, a rangefinder 4, a camera 5 and a feeding component. Compared with the prior art method of manually placing, adjusting and recycling the plastic plate, the present invention pushes the plastic plate to move between the adjustment block 201 and the pressure plate 403 through an electric cylinder 1 302, and at the same time pushes the printed plastic plate away from the printing position, through a double The distance between the two adjustment blocks 201 is adjusted by rotating the screw 501, and the plastic plate is driven to rise and fall, and the height of the plastic plate is adapted to the height of the workpiece by cooperating with the rangefinder 4. The height of the cutting head 2 is fine-tuned by cooperating with the motor 101, the reducer 102, the driving gear 103, the driven gear 104 and the height adjustment screw 105. The cutting head 2 performs laser printing on the plastic plate, and the camera 5 transmits the printed line image to the processor. The processor confirms the thinnest position of the line, which is the focus position, and adjusts the cutting head 2 to the focus corresponding position through the motor 101. The printed plastic plate is cooled by the cooling plate 701. At the same time, the plastic plate can be pushed to the edge of the workbench 3 by the movement of the movable seat 1, which is convenient for the recovery of the plastic plate. The adjustment efficiency of laser cutting is relatively high.

[0021] The focus height adjustment component is arranged on the mobile seat 1, and is used to adjust the height of the cutting head 2. The focus height adjustment component includes a motor 101, a reducer 102, a driving gear 103, a driven gear 104 and a height adjustment screw 105. The motor 101 is arranged on the mobile seat 1, the reducer 102 is arranged on the mobile seat 1, the input end of the reducer 102 is arranged on the output end of the motor 101, the driving gear 103 is arranged on the output end of the reducer 102, the driven gear 104 is rotatably arranged on the mobile seat 1, the driven gear 104 and the driving gear 103 are meshed, the height adjustment screw 105 is arranged on the cutting head 2, and the driven gear 104 is provided with an adjusting nut matching the height adjustment screw 105. The mobile seat 1 is provided with a height adjustment screw 105. The through hole through which the screw 105 passes drives the driving gear 103 to rotate through the motor 101 and the reducer 102, thereby driving the driven gear 104 and the height adjustment nut to rotate. A sliding rod is provided on the cutting head 2, and the sliding rod and the moving seat 1 are in sliding cooperation. Through the cooperation of the height adjustment screw 105 and the height adjustment nut and the limitation of the cutting head 2 by the sliding rod, the cutting head 2 can be driven to rise and fall by the height adjustment screw 105, and the speed of the motor 101 is reduced by the reducer 102. At the same time, the number of teeth of the driving gear 103 is less than the number of teeth of the driven gear 104, so that the height adjustment nut rotates slowly, and the pitch of the height adjustment screw 105 is small, so that the cutting head 2 is slowly raised and lowered, thereby achieving fine adjustment of the height of the cutting head 2, that is, the height of the focus.

[0022] The printing height adjustment component is arranged on the workbench 3, and is used to adjust the height of the plastic plate. The printing height adjustment component includes an adjustment block 201 and a limit frame 202. Two adjustment blocks 201 are arranged, and the two adjustment blocks 201 move relatively. The adjustment blocks 201 are in contact with the bottom of the plastic plate. The top of the adjustment block 201 is arranged at an angle, and the ends of the two adjustment blocks 201 that are close to each other are the lower ends. The limit frame 202 can be raised and lowered on the workbench 3, and the limit frame 202 is in contact with the plastic plate. Two electric cylinders 203 are arranged on the workbench 3, and two limit frames 202 are arranged. The limit frames 202 and the electric cylinders 203 correspond one to one. The limit frame 202 is arranged at the output end of the electric cylinder 203. The two limit frames 202 are located on both sides of the plastic plate. The directions of the two limit frames 202 are perpendicular to the directions of the two adjustment blocks 201, and the two adjustment blocks 201 cooperate to limit the plastic plate. The limit frame 202 can be driven to rise and fall by the electric cylinder 203. The limit frame 202 can support and limit the plastic plate to prevent the plastic plate from falling onto the workbench 3. The plastic plate moves along the top inclined surface of the adjustment block 201. Through the movement of the two adjustment blocks 201, the plastic plate is lifted and lowered along the top inclined surface of the adjustment block 201 to adjust the height of the plastic plate and adapt to the workpiece.

[0023] The rangefinder 4 is arranged on the moving seat 1 for measuring the height of the workpiece or the plastic plate. The camera 5 is arranged on the moving seat 1 for photographing the printing marks. The rangefinder 4 emits a laser, and uses a photoelectric element to receive the laser beam reflected by the target. The timer calculates the time from the light emission to the reception of the light beam, and calculates the distance. The distance between the workpiece and the plastic plate and the moving seat 1 can be measured, that is, the height of the workpiece and the plastic plate can be measured. The image of the plastic plate after laser printing is photographed by the camera 5, and the printed image is transmitted to the processor. The thickness of the printing marks is judged by the processor. The processor can record the height of the cutting head 2 and the route of the printing marks. The thinnest part of the printing marks is the focus position. According to the record, the height of the cutting head 2 at this time can be found, and the height adjustment screw 105 is driven to rotate by the motor 101 and the reducer 102 to adjust the cutting head 2 to the height corresponding to the focus. The rangefinder 4, the camera 5 and the processor are all prior arts known to those skilled in the art, and will not be repeated here.

[0024] The feeding component is used to transport the plastic plate to the printing height adjustment component. The feeding component includes a storage box 301 and an electric cylinder 302. The storage box 301 is arranged on the workbench 3. A discharge port is provided at the bottom of the storage box 301. The electric cylinder 302 is arranged on the storage box 301. The output end of the electric cylinder 302 extends into the interior of the storage box 301 and contacts the plastic plate at the bottom. The plastic plates are stacked horizontally in the storage box 301 in sequence. The electric cylinder 302 is initially located inside the side wall of the storage box 301 and contacts the bottom plastic plate. The bottom plastic plate can be pushed out of the discharge port by the electric cylinder 302. The height of the printed plastic plate can be adjusted by adjusting the adjustment block 201. Corresponding to the height of the discharge port, the electric cylinder 203 drives the limit frame 202 to drop below the plastic plate, so that the electric cylinder 1 302 pushes the new plastic plate to contact the printed plastic plate. The electric cylinder 1 302 continues to push the plastic plate, moves the new plastic plate to the top of the adjusting block 201, and pushes the printed plastic plate away from the adjusting block 201 to the workbench 3, thereby realizing the replacement of the plastic plate. When the electric cylinder 1 302 pushes the plastic plate, its conveying shaft can block the upper plastic plate. When the electric cylinder 1 302 is shortened to its original position, the plastic plate above the storage box 301 loses the obstruction of the output shaft of the electric cylinder 1 302 and falls on the inner bottom wall of the storage box 301, preparing for the subsequent pushing of the plastic plate.

[0025] In order to improve the stability of the plastic plate, a pressing component is also included, which includes a support frame 401, a lifting plate 402 and a pressing plate 403. The support frame 401 is arranged on the workbench 3, the lifting plate 402 can be lifted and lowered on the support frame 401, and the pressing plate 403 is arranged at the bottom of the lifting plate 402 through multiple springs and multiple telescopic rods, and the pressing plate 403 is in contact with the top of the plastic plate; In order to realize the synchronous lifting of the pressing plate 403 and the plastic plate, a driving component is also included, which is used to drive the adjustment block 201 and the lifting plate 402 to move. The driving component includes a bidirectional screw 501 and a driving screw 502. The bidirectional screw 501 is rotatably arranged on the workbench 3, and a driving cavity is arranged on the workbench 3. A motor 2 503 is arranged inside the driving cavity for driving the bidirectional screw 501 to rotate. The two adjustment blocks 201 are symmetrically arranged on the outside of the bidirectional screw 501, and the two adjustment blocks 201 are respectively threadedly matched with the two external threads of the bidirectional screw 501. The driving screw 502 is arranged on the top of the lifting plate 402, and the driving screw 502 is connected to the bidirectional screw 501 through a transmission member. The transmission parts include a driving bevel gear 601, a driving bevel gear 1 602, a driving bevel gear 2 603 and a driven bevel gear 604. Both ends of the bidirectional screw 501 are provided with driving rods 605. The driving bevel gear 601 is fixedly sleeved on the outside of the driving rod 605. One of the driving rods 605 is arranged at the output end of the motor 2 503. A driving rod 1 606 is rotatably arranged on the support frame 401. There are two driving bevel gears 1 602. The two driving bevel gears 1 602 are respectively fixedly arranged at both ends of the driving rod 1 606. The driving bevel gear 1 602 at the bottom is meshed with the driving bevel gear 601. The driving rod 2 606 is rotatably arranged on the support frame 401. 07, there are two transmission bevel gears 603, which are fixedly arranged at the two ends of the transmission rod 607, respectively. The transmission bevel gear 1 602 far away from the driving gear 103 is meshed with one of the transmission bevel gears 603, and the driven bevel gear 604 is rotatably arranged on the support frame 401, and the driven bevel gear 604 is meshed with the transmission bevel gear 2 603 far away from the transmission bevel gear 1 602. The driven bevel gear 604 is provided with a driving nut adapted to the driving screw 502, and a through hole for the driving screw 502 to pass through is opened on the support frame 401, and a limiting rod is provided on the lifting plate 402, and the limiting rod and the support frame 401 are in sliding fit; The motor 2 503 can drive the driving rod 605 and the bidirectional screw 501 to rotate, and the bidirectional screw 501 can drive the two adjusting blocks 201 to move closer to or away from each other. At the same time, the driving rod 605 drives the driving bevel gear 601, the transmission bevel gear 1 602, the transmission bevel gear 2 603 and the driven bevel gear 604 to rotate, thereby driving the driving screw 502 to move up and down, and driving the lifting plate 402 and the pressing plate 403 to move up and down. When the two adjusting blocks 201 move closer to each other and the plastic plate rises, the driving screw 502 drives the lifting plate 402 and the pressing plate 403 rise. When the bidirectional screw 501 reverses and drives the two adjusting blocks 201 away from each other, causing the plastic plate to descend, the driving screw 502 drives the lifting plate 402 and the pressing plate 403 to descend. The lifting plate 402 rises and falls with the lifting of the plastic plate. Under the action of the spring, the pressing plate 403 presses the plastic plate against the surface of the adjusting block 201, and cooperates with the adjusting block 201 to limit the plastic plate, so that the plastic plate is in the middle position of the two adjusting blocks 201, ensuring the levelness of the plastic plate and the stability of the plastic plate.

[0026] In order to cool down and recycle the printed plastic plate, a cooling component is also included, which includes a cooling plate 701 and a gas storage bottle 702. The cooling plate 701 can be lifted and arranged on the movable seat 1. The movable seat 1 is provided with an electric cylinder 3 703. The cooling plate 701 is arranged at the output end of the electric cylinder 3 703. The bottom of the cooling plate 701 contacts the plastic plate. A cooling cavity is provided inside the cooling plate 701. A plurality of air outlets are provided at the bottom of the cooling plate 701. The air outlets are connected to the cooling cavity. The gas storage bottle 702 is arranged on the workbench 3. The gas storage bottle 702 is connected to the cooling cavity. Liquid nitrogen or other low-temperature liquefied gas is contained in the gas storage bottle 702. The gas storage bottle 702 is provided with a plurality of air outlets. The air outlets are connected to the cooling cavity. There is a valve. When a new plastic plate pushes the printed plastic plate from between the adjusting block 201 and the pressing plate 403 to the surface of the workbench 3, the moving seat 1 drives the cooling plate 701 to move above the plastic plate, and opens the gas cylinder 702 through the valve, so that the low-temperature gas in the gas cylinder 702 enters the cooling chamber, and the electric cylinder three 703 drives the cooling plate 701 to press on the surface of the plastic plate, and cools the plastic plate by the low-temperature gas. At the same time, the moving seat 1 drives the cooling plate 701 to move, pushing the plastic plate to the edge position of the workbench 3, and then the moving seat 1 drives the cutting head 2 to perform laser cutting of the workpiece. At this time, the plastic plate at the edge can be recycled to reduce safety hazards.

[0027] The working principle or use process of the distance control mechanism of the laser cutting machine is as follows: The workpiece is fixed at a suitable position on the workbench 3, and the movable seat 1 is moved to the top of the workpiece by the numerical control system. The distance between the workpiece and the distance meter 4 is measured by the distance meter 4. A plastic plate is initially placed between the pressure plate 403 and the adjustment block 201, and the movable seat 1 is moved to the top of the plastic plate. The motor 2 503 is turned on, and the motor 2 503 drives the bidirectional screw 501 to rotate, and the distance between the two adjustment blocks 201 is adjusted to make the plastic plate rise and fall. At the same time, the distance between the plastic plate and the distance meter 4 is measured by the distance meter 4. When the measured data and the distance between the workpiece and the distance meter 4 are equal, the motor 2 503 stops, so that the plastic plate and the workpiece are at the same height. In this process, the driven bevel gear 601, the transmission bevel gear 1 602 and the transmission bevel gear 2 603 drive the driven bevel gear 604 to rotate, so that the driving screw 502 drives the lifting plate 402 to rise and fall with the plastic plate, and the pressure plate 403 presses the plastic plate against the surface of the adjustment block 201 under the action of the spring; The cutting head 2 emits laser to perform laser printing on the plastic plate. The moving seat 1 drives the cutting head 2 to move and prints straight line marks on the plastic plate. At the same time, the motor 101 drives the height adjustment screw 105 and the cutting head 2 to slowly rise and fall, and prints the marks of the cutting head 2 at different heights on the plastic plate. The camera 5 takes pictures of the printed marks on the plastic plate and transmits the image to the processor. The processor determines the position of the thinnest printed marks, and finds the height of the cutting head 2 corresponding to this position according to the record, and controls the motor 101 to drive the height adjustment screw 105 to rotate, so that the cutting head 2 is raised and lowered to the height corresponding to the focus. The movable seat 1 drives the cutting head 2 to move and cut the workpiece. During this process, the motor 2 503 drives the adjusting block 201 to move, so that the printed plastic plate is lifted to the height corresponding to the discharge port, and the electric cylinder 1 302 pushes the plastic plate in the storage box 301 to move out of the discharge port. The electric cylinder 203 drives the limiting frame 202 to drop to a height lower than the plastic plate, and the new plastic plate moves between the adjusting plate and the pressing plate 403. At the same time, the printed plastic plate is pushed out from between the adjusting block 201 and the pressing plate 403. After the cutting is completed, the movable seat 1 drives the adjusting block 201 to move. The cutting head 2 and the cooling plate 701 move to the printed plastic plate, and the gas cylinder 702 is opened through the valve to allow the low-temperature gas in the gas cylinder 702 to enter the cooling chamber. The cooling plate 701 is driven down by the electric cylinder 703, and the cooling plate 701 is pressed tightly on the top of the printed plastic plate to cool the plastic plate. At the same time, the moving seat 1 moves, driving the cooling plate 701 to push the plastic plate to the edge of the workbench 3, and then the moving seat 1 drives the cutting head 2 to continue cutting or focus adjustment, and the plastic plate on the edge of the workbench 3 can be recovered.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser cutting device with a distance control mechanism, comprising a moving seat (1) and a cutting head (2), wherein the moving seat (1) is arranged on a working table (3) of a laser cutting machine, and is characterized in that: Also includes: A focus height adjustment component, the focus height adjustment component being arranged on the movable seat (1) and being used for adjusting the height of the cutting head (2); A printing height adjustment component, the printing height adjustment component is arranged on the workbench (3) and is used to adjust the height of the plastic plate; a distance meter (4), the distance meter (4) being arranged on the movable seat (1) and being used for measuring the height of a workpiece or a plastic plate; A camera (5), the camera (5) being arranged on the movable seat (1) and being used for photographing the printing trace; A feeding component, which is used to transport the plastic plate to the print height adjustment component, and includes: A material storage box (301), the material storage box (301) being arranged on the workbench (3), and a material discharge port being provided at the bottom of the material storage box (301); An electric cylinder (302) is arranged on the material storage box (301), and an output end of the electric cylinder (302) extends into the interior of the material storage box (301) and contacts a plastic plate at the bottom.

2. The laser cutting device with a distance control mechanism according to claim 1, characterized in that: The focus heightening component comprises: Motor 1 (101), the motor 1 (101) being arranged on the movable seat (1); A reducer (102), the reducer (102) being arranged on the movable seat (1), and the input end of the reducer (102) being arranged at the output end of the motor 1 (101); A driving gear (103), the driving gear (103) being arranged at an output end of the reducer (102); A driven gear (104), the driven gear (104) being rotatably disposed on the movable seat (1), the driven gear (104) being meshed with the driving gear (103); A height-adjusting screw (105) is arranged on the cutting head (2); an adjusting nut matching the height-adjusting screw (105) is arranged on the driven gear (104); and a through hole for the height-adjusting screw (105) to pass through is opened on the movable seat (1).

3. The laser cutting device with a distance control mechanism according to claim 2, characterized in that: The print height adjustment component comprises: An adjusting block (201), wherein two adjusting blocks (201) are provided, the two adjusting blocks (201) move relative to each other, the adjusting blocks (201) are in contact with the bottom of the plastic plate, the top of the adjusting block (201) is arranged in an inclined manner, and the ends of the two adjusting blocks (201) that are close to each other are the lower ends; A limiting frame (202), wherein the limiting frame (202) is arranged on the workbench (3) in a liftable manner, and the limiting frame (202) is in contact with the plastic plate.

4. The laser cutting device with a distance control mechanism according to claim 3, characterized in that: It also includes a pressing component, which includes: A support frame (401), the support frame (401) being arranged on the workbench (3); A lifting plate (402), the lifting plate (402) being liftable and arranged on the supporting frame (401); A pressing plate (403), wherein the pressing plate (403) is arranged at the bottom of the lifting plate (402) via a plurality of springs and a plurality of telescopic rods, and the pressing plate (403) is in contact with the top of the plastic plate.

5. The laser cutting device with a distance control mechanism according to claim 4, characterized in that: It also includes a driving component, the driving component is used to drive the adjustment block (201) and the lifting plate (402) to move, and the driving component includes: A bidirectional screw (501), the bidirectional screw (501) being rotatably arranged on the workbench (3), the two adjustment blocks (201) being symmetrically arranged outside the bidirectional screw (501), and the two adjustment blocks (201) being threadably matched with two external threads of the bidirectional screw (501); A driving screw rod (502) is rotatably disposed on the top of the lifting plate (402), and the driving screw rod (502) is drivingly connected to the bidirectional screw rod (501) via a transmission member.

6. The laser cutting device with a distance control mechanism according to claim 5, characterized in that: The transmission member comprises: A driving bevel gear (601), wherein driving rods (605) are provided at both ends of the bidirectional screw rod (501), and the driving bevel gear (601) is fixedly sleeved on the outside of the driving rod (605); A transmission bevel gear 1 (602), a transmission rod 1 (606) is rotatably arranged on the support frame (401), two transmission bevel gears 1 (602) are arranged, and the two transmission bevel gears 1 (602) are respectively fixedly arranged at two ends of the transmission rod 1 (606), and the transmission bevel gear 1 (602) located at the bottom is meshed with the driving bevel gear (601); A transmission bevel gear 2 (603), a transmission rod 2 (607) is rotatably arranged on the support frame (401), two transmission bevel gears 2 (603) are arranged, and the two transmission bevel gears 2 (603) are respectively fixedly arranged at two ends of the transmission rod 2 (607), and the transmission bevel gear 1 (602) away from the driving gear (103) is meshed with one of the transmission bevel gears 2 (603); A driven bevel gear (604) is rotatably arranged on the support frame (401), the driven bevel gear (604) is meshed with the second transmission bevel gear (603) which is away from the first transmission bevel gear (602), the driven bevel gear (604) is provided with a driving nut adapted to the driving screw rod (502), and the support frame (401) is provided with a through hole for the driving screw rod (502) to pass through.

7. The laser cutting device with a distance control mechanism according to claim 6, characterized in that: It also includes a cooling component, the cooling component including: A cooling plate (701), the cooling plate (701) being movably arranged on the movable seat (1), the bottom of the cooling plate (701) being in contact with the plastic plate, a cooling chamber being provided inside the cooling plate (701), a plurality of air outlets being provided at the bottom of the cooling plate (701), the air outlets being in communication with the cooling chamber; A gas storage bottle (702), the gas storage bottle (702) being arranged on the workbench (3), and the gas storage bottle (702) being in communication with the cooling chamber.

Images