Laser cutting equipment

Abstract

The invention relates to laser cutting equipment which comprises a rack, a laser generator, a laser head and an optical transmission assembly are arranged on the rack, the optical transmission assembly comprises four reflectors, and the first reflector and the second reflector are arranged at the end, close to a light beam outlet of the laser generator, of the rack. The mirror surfaces of the first reflector and the second reflector are perpendicular to each other, the third reflector is located at the end, away from the second reflector, of the rack, the mirror surfaces of the third reflector and the fourth reflector are perpendicular to each other, a first moving plate and a second moving plate are slidably connected to the rack, and the third reflector and the fourth reflector are arranged on the first moving plate. The laser head is arranged on the second moving plate, a driving assembly is arranged on the rack and drives the first moving plate and the second moving plate to move in the same direction, the moving speed of the second moving plate is twice that of the first moving plate, and the total optical path of laser beams is constant through the driving assembly. The cutting device has the effect of improving the cutting quality.

Description

Technical Field

[0001] This application relates to the field of laser cutting technology, and in particular to a laser cutting device. Background Art

[0002] Laser cutting uses a high-power-density laser beam to irradiate the material being cut, quickly heating the material to its vaporization temperature and causing it to evaporate and form a hole. As the beam moves relative to the material, the holes continuously form a very narrow kerf, thus completing the cutting of the material.

[0003] A typical laser cutting device usually includes a laser generator, an optical transmission assembly, and a laser cutting head mounted on a stand. The laser generator and optical transmission assembly are usually fixed on the stand and are used to generate and guide the laser to the laser cutting head. The laser beam is focused into a high-power-density laser beam by a focusing lens in the laser cutting head, and the laser cutting head moves on the stand to form a cut on the workpiece.

[0004] However, the movement of the laser cutting head alters the laser beam path length. Increasing the path length increases the divergence of the laser beam, resulting in a larger focused spot and lower energy density. Conversely, decreasing the path length reduces the divergence, leading to a smaller focused spot and higher energy density. Therefore, the movement of the laser cutting head causes deformation of the laser spot shape and changes in the laser beam energy density. This results in inconsistent melting and vaporization of the material being cut, leading to variations in cutting depth or cut surface size, severely reducing cutting quality and presenting significant shortcomings. Summary of the Invention

[0005] To improve cutting quality, this application provides a laser cutting device.

[0006] The laser cutting equipment provided in this application adopts the following technical solution: A laser cutting device includes a frame on which a laser generator, a laser head, and an optical transmission assembly are mounted. The optical transmission assembly includes four mirrors arranged sequentially as a first mirror, a second mirror, a third mirror, and a fourth mirror along the optical path transmission direction. The first mirror and the second mirror are mounted on the frame near the laser generator beam outlet via mounting plates. The mirror surfaces of the first mirror and the second mirror are perpendicular to each other. The third mirror is located at the frame away from the second mirror, and the mirror surfaces of the third mirror and the fourth mirror are perpendicular to each other. The light beam reflected by the fourth mirror is transmitted to the laser head. A first moving plate and a second moving plate are slidably connected to the frame. The third mirror and the fourth mirror are mounted on the first moving plate, and the laser head is mounted on the second moving plate. A driving assembly is provided on the frame to drive the first moving plate and the second moving plate to move in the same direction, with the moving speed of the second moving plate being twice that of the first moving plate.

[0007] By adopting the above technical solution, the laser beam generated by the laser generator is reflected by the first reflecting mirror to the second reflecting mirror, the second reflecting mirror to the third reflecting mirror, the third reflecting mirror to the fourth reflecting mirror, and finally transmitted to the laser cutting head. During the laser transmission process, the distance between the first and second reflecting mirrors and the third and fourth reflecting mirrors is constant. When the laser cutting head moves, the first moving plate moves in the same direction as the laser cutting head. At this time, the optical path distance between the fourth reflecting mirror and the laser cutting head increases, while the optical path distance between the second and third reflecting mirrors decreases. Since the moving speed of the laser cutting head is twice that of the third and fourth reflecting mirrors, the increased optical path distance between the fourth reflecting mirror and the laser cutting head compensates for the decreased optical path distance between the second and third reflecting mirrors. At this time, the total optical path of the laser remains unchanged, thereby avoiding the influence of the change in the laser optical path on the spot shape and energy density, and improving the quality of laser cutting.

[0008] Optionally, the frame is provided with a first sliding groove and a second sliding groove. The drive assembly includes a first screw and a second screw respectively rotatably connected in the first sliding groove and the second sliding groove. One end of the first moving plate is threaded to the first screw, and the other end is rotatably connected to the second screw. One end of the second moving plate is threaded to the second screw, and the other end is rotatably connected to the first screw. The pitch of the second screw is twice that of the first screw. Synchronous pulleys are coaxially provided at the ends of the first screw and the second screw. A synchronous belt is sleeved on both synchronous pulleys. A drive motor for driving the second screw to rotate is provided on the frame.

[0009] By adopting the above technical solution, the drive motor drives the first screw and the second screw to rotate synchronously through the transmission action of the synchronous pulley and the synchronous belt. The rotation of the first screw drives the first moving plate to move, and the rotation of the second screw drives the second moving plate to move. Since the pitch of the second screw is twice that of the first screw, the moving speed of the laser cutting head is twice that of the third and fourth reflecting mirrors, thereby realizing automatic compensation of the optical path and ensuring that the total optical path of the laser remains unchanged during the movement of the laser cutting head.

[0010] Optionally, the first movable plate and the mounting plate are provided with protective shells corresponding to the reflectors one by one. Each reflector has a mounting frame on its outer surface, and the mounting frame is located inside the protective shell. Each protective shell has an entrance port and a reflection port.

[0011] By adopting the above technical solution, the protective shell effectively reduces the entry of external dust and impurities into the optical path system, avoids interference from contaminants on laser transmission and emission, and ensures the stability of laser energy and beam quality, thereby improving the cutting quality. At the same time, the setting of the entrance and reflection port effectively limits the propagation direction of the laser within the protective shell, prevents the laser from scattering around the reflector or deviating from the predetermined optical path, and ensures that the laser can be reflected and transmitted at the correct angle and direction, further improving the cutting quality.

[0012] Optionally, a cleaning assembly is provided within the mounting frame. Mounting cavities are formed on opposite inner sidewalls of the mounting frame. The cleaning assembly includes a lead screw and a guide rod respectively disposed within each mounting cavity. The lead screw is rotatably connected to one of the mounting cavities. A connecting block is threaded onto the lead screw. A guide block is slidably connected to the guide rod. Connecting rods are rotatably connected to both the guide block and the connecting block. A cleaning roller is disposed between the two connecting rods. Cleaning cotton is sleeved on the outer surface of the cleaning roller, and the cleaning cotton abuts against the outer surface of the reflector. A rotating assembly for driving the lead screw to rotate is provided on the first moving plate and the mounting plate.

[0013] By adopting the above technical solution, when the reflector needs to be cleaned, the CNC system controls the rotating component to start, the rotating component drives the lead screw to rotate, and the lead screw rotation drives the cleaning roller to move along the length of the mounting frame. During the movement of the cleaning roller, the cleaning cotton comes into contact with the reflector surface to clean the dust and impurities on its surface, thereby ensuring the cleanliness of the reflector surface. Compared with the traditional cleaning method, the setting of the cleaning component eliminates the need for cleaning personnel to remove the reflector from the protective shell for cleaning, avoiding the occurrence of fingerprint residue due to direct contact between human hands and the lens. At the same time, the cleaning cotton maintains good contact and uniform wiping force with the reflector surface, ensuring that the contaminants on the reflector surface are effectively removed, while avoiding damage to the reflector and ensuring that the optical performance of the reflector is not affected, thereby improving the cutting quality.

[0014] Optionally, each of the mounting cavities is provided with multiple elastic bladders, which are evenly distributed at equal intervals along the length of the mounting frame. The multiple elastic bladders are connected through liquid pipes, and each elastic bladder is provided with cleaning fluid. Each elastic bladder is connected with a liquid outlet nozzle, and the liquid outlet nozzle is oriented towards the surface of the reflector. The mounting frame is provided with a squeezing assembly that sequentially squeezes the multiple elastic bladders.

[0015] By adopting the above technical solution, the extrusion assembly sequentially extrudes multiple elastic bladders along the moving direction of the cleaning roller. The cleaning fluid in the extruded elastic bladders is sprayed onto the surface of the reflector through the liquid outlet nozzle. The cleaning fluid has the function of dissolving and removing stubborn contaminants such as oil and stains from the surface of the reflector. At the same time, when the cleaning cotton comes into contact with the cleaning fluid, the cleaning cotton absorbs the cleaning fluid and spreads it evenly on the surface of the reflector through the movement of the cleaning roller, making the reflector cleaner, improving the laser reflection efficiency and beam quality, thereby improving the cutting quality.

[0016] Optionally, the extrusion assembly includes a gear fixedly connected coaxially to the two connecting rods, and a rack plate meshing with the gear is provided in each of the two mounting cavities. A cam is fixedly connected coaxially to each connecting rod. The cam is rotatably disposed in the mounting cavity. When the cam's convex part rotates to face the elastic bladder, the cam extrudes the elastic bladder. When the cam's convex part rotates away from the elastic bladder, the cam disengages from the elastic bladder.

[0017] By adopting the above technical solution, as the cleaning roller moves along the length of the mounting frame, it drives the connecting rod to move, and the connecting rod drives the gear to move along the length of the rack plate. Since the gear and rack plate are meshed, the gear rotates during movement. The rotation of the gear drives the cam to rotate around the connecting rod. When the cam's protruding end rotates to face the elastic bladder, the cam squeezes the elastic bladder, and the cleaning fluid in the elastic bladder is sprayed onto the surface of the reflector through the liquid outlet nozzle, thus realizing the spraying of the cleaning fluid. In addition, the rotation of the connecting rod drives the cleaning roller to rotate, and the cleaning roller drives the cleaning cotton to rotate. During the rotation, different parts of the cleaning cotton come into contact with the surface of the reflector in sequence, increasing the contact area between the cleaning cotton and the reflector. This avoids the possibility of dust accumulating on specific positions of the cleaning cotton on the reflector surface, thus reducing the cleaning effect of the cleaning cotton. Furthermore, the rotating cleaning cotton increases the wiping force on the reflector surface, increasing the possibility of removing stubborn dust stains, and further improving the cleaning effect of the cleaning component.

[0018] Optionally, a squeezing plate for squeezing the cleaning sponge is provided on the inner side wall of the mounting frame, a receiving groove is provided on the inner side wall of the mounting frame, a liquid receiving plate is slidably connected to the receiving groove, a liquid collecting groove is provided on the liquid receiving plate, the liquid collecting groove is inclined, and liquid channels connected to the liquid collecting groove are provided on opposite sides of the liquid receiving plate, a filter is provided at the liquid inlet end of the liquid channel, and the liquid outlet end is connected to the elastic bag on the same side through a liquid return pipe, the liquid return pipe is a corrugated pipe, and a pop-up component for popping out the liquid receiving plate is provided in the receiving groove.

[0019] By adopting the above technical solution, when the cleaning roller moves to the point where the cleaning sponge abuts the liquid squeezing plate, the pop-up assembly pops out the liquid receiving plate. As the rotating cleaning roller continues to move, the liquid squeezing plate squeezes the cleaning sponge, and the residual cleaning liquid in the cleaning sponge is squeezed into the liquid collecting tank of the liquid receiving plate. Under the action of gravity, the squeezed cleaning liquid flows along the inclined direction of the liquid collecting tank, flows into the liquid channel after being filtered by the filter screen, and finally flows into the elastic bag through the return pipe. This arrangement realizes the automatic replenishment of the cleaning liquid, ensures that the capacity of the cleaning liquid in the elastic bag is sufficient, and thus ensures the smooth spraying of the cleaning liquid.

[0020] Optionally, the pop-up assembly includes an electromagnetic block arranged at the end of the receiving groove, and a magnetic block is embedded in the end of the liquid receiving plate near the receiving groove. When the electromagnetic block is energized, the electromagnetic block adsorbs the magnetic block. A spring is arranged in the receiving groove, one end of the spring is arranged on the inner wall of the receiving groove, and the other end is arranged on the magnetic block. When the spring is in a natural state, the liquid receiving plate abuts against the end of the receiving groove away from the electromagnetic block.

[0021] By adopting the above technical solution, when the cleaning roller cleans the reflector, the electromagnetic block is energized to attract the magnetic block. At this time, the spring is compressed and the liquid receiving plate is embedded in the receiving groove. When the cleaning roller moves above the receiving groove, the energization of the electromagnetic block is canceled, the attraction force on the spring disappears, the spring resets and pushes the liquid receiving plate to extend out of the receiving groove. At this time, the liquid receiving plate is set below the cleaning roller to receive the cleaning liquid.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. This application provides a first movable plate, a second movable plate, and a drive assembly, wherein the drive assembly drives the laser cutting head to move at a speed twice as fast as the third and fourth reflectors. This allows the increased optical path distance between the fourth reflector and the laser cutting head to compensate for the decreased optical path distance between the second and third reflectors. At this time, the total optical path of the laser remains unchanged, thereby avoiding the impact of changes in the laser optical path on the spot shape and energy density, and improving the quality of laser cutting. 2. This application incorporates a cleaning component to remove dust and impurities from the surface of the reflector, ensuring its cleanliness. Compared to traditional cleaning methods, this component eliminates the need for personnel to remove the reflector from its protective casing, preventing fingerprints from direct contact between hands and the lens. Furthermore, the cleaning cotton maintains excellent contact and uniform wiping pressure with the reflector surface, ensuring effective removal of contaminants while preventing damage and preserving the reflector's optical performance, thereby improving cutting quality. 3. This application incorporates an elastic bladder, a cleaning fluid, and a squeezing assembly. The squeezing assembly sequentially squeezes multiple elastic bladders along the moving direction of the cleaning roller. The cleaning fluid in the squeezed elastic bladders is sprayed onto the surface of the reflector through the liquid outlet nozzle. The cleaning fluid dissolves and removes stubborn contaminants such as oil and stains from the reflector surface. Simultaneously, when the cleaning cotton comes into contact with the cleaning fluid, the cleaning cotton absorbs the cleaning fluid and, through the movement of the cleaning roller, evenly coats the reflector surface with the cleaning fluid, making the reflector cleaner, improving the laser reflection efficiency and beam quality, thereby improving the cutting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of this application.

[0024] Figure 2 This is a schematic diagram showing the positions of the first sliding groove and the second sliding groove in an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the structure of the driving component in the embodiments of this application.

[0026] Figure 4 This is a cross-sectional view of the first movable plate in an embodiment of this application.

[0027] Figure 5 This is a cross-sectional view of the protective box in an embodiment of this application.

[0028] Figure 6 This is a cross-sectional view of the mounting cavity in an embodiment of this application.

[0029] Figure 7 This is a cross-sectional view of the receiving tank in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 01, stand; 011, first sliding groove; 012, second sliding groove; 1, laser generator; 2, optical transmission assembly; 21, reflector; 211, first reflector; 212, second reflector; 213, third reflector; 214, fourth reflector; 3, laser cutting head; 4, mounting plate; 5, first moving plate; 6, second moving plate; 7, drive assembly; 71, first screw; 72, second screw; 73, drive motor; 8, protective shell; 81, entrance port; 82, reflection port; 9, mounting frame; 91, mounting cavity; 92, receiving groove; 10, cleaning assembly; 1 01. Lead screw; 102. Guide rod; 103. Connecting block; 104. Guide block; 105. Connecting rod; 106. Cleaning roller; 107. Cleaning cotton; 11. Rotating assembly; 111. Worm gear; 112. Worm wheel; 113. Drive motor; 12. Elastic bladder; 121. Liquid pipe; 122. Liquid outlet nozzle; 13. Extrusion assembly; 131. Gear; 132. Rack plate; 133. Cam; 14. Extrusion plate; 15. Liquid receiving plate; 151. Liquid collection tank; 152. Liquid channel; 153. Return pipe; 16. Pop-up assembly; 161. Electromagnetic block; 162. Magnetic block; 163. Spring. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-7 This application is described in further detail.

[0032] This application discloses a laser cutting device.

[0033] Reference Figure 1 A laser cutting device includes a frame 01, on which a laser generator 1, a laser cutting head 3, and an optical transmission component 2 are disposed. The laser generator 1 is fixedly connected to the frame 01 to generate a laser beam, and the optical transmission component 2 is used to transmit the laser beam generated by the laser generator 1 to the laser cutting head 3. The laser cutting head 3 is slidably disposed on the frame 01 to form a kerf.

[0034] Reference Figure 1 、 Figure 2 and Figure 3 The optical transmission assembly 2 includes four reflectors 21, which are arranged sequentially as a first reflector 211, a second reflector 212, a third reflector 213, and a fourth reflector 214 along the transmission direction of the laser beam. The first reflector 211 and the second reflector 212 are fixedly connected to the end of the stand 01 near the beam outlet of the laser generator 1 by a mounting plate 4. The mirror surfaces of the first reflector 211 and the second reflector 212 are perpendicular to each other. The third reflector 213 is located at the end of the stand 01 away from the second reflector 212. The mirror surfaces of the third reflector 213 and the fourth reflector 214 are perpendicular to each other.

[0035] Reference Figure 1 、 Figure 2 and Figure 3 In the initial state, after the laser generator 1 generates a laser beam, the laser beam is reflected by the first reflector 211 to the second reflector 212. The second reflector 212 transmits the laser beam along the length of the laser generator 1 to the third reflector 213. The third reflector 213 transmits the laser beam to the fourth reflector 214. Finally, the fourth reflector 214 transmits the laser beam to the laser head. During the transmission of the laser beam, since the first reflector 211, the second reflector 212, and the laser generator 1 are all fixedly connected to the stand 01, the optical path from the laser beam to the second reflector 212 remains constant, which is denoted as L1 in this embodiment. The optical path from the second reflector 212 to the third reflector 213 is denoted as L2, the optical path from the third reflector 213 to the fourth reflector 214 is denoted as L3, and the optical path from the fourth reflector 214 to the laser cutting head 3 is denoted as L4. At this time, the optical path of the laser beam = L1 + L2 + L3 + L4.

[0036] Reference Figure 1 、 Figure 2 and Figure 3 In order to maintain a constant laser path, a first moving plate 5 and a second moving plate 6 are slidably connected on the stage 01. The moving direction of the first moving plate 5 and the second moving plate 6 is parallel to the length direction of the laser generator 1. The third reflector 213 and the fourth reflector 214 are both fixedly connected to the first moving plate 5, and the laser head is fixedly connected to the second moving plate 6.

[0037] Reference Figure 1 、 Figure 2 and Figure 3 A drive assembly 7 is provided on the frame 01. The drive assembly 7 includes a first screw 71 and a second screw 72. The frame 01 has a first sliding groove 011 and a second sliding groove 012 that are rotatably engaged with the first screw 71 and the second screw 72, respectively. The first moving plate 5 and the second moving plate 6 are slidably connected in the first sliding groove 011 and the second sliding groove 012. One end of the first moving plate 5 is threaded to the first screw 71, and the other end is rotatably connected to the second screw 72. One end of the second moving plate 6 is threaded to the second screw 72, and the other end is rotatably connected to the first screw 71. The pitch of the second screw 72 is twice the pitch of the first screw 71. The ends of the first screw 71 and the second screw 72 extend to the outer surface of the frame 01 and are coaxially fixedly connected to a synchronous pulley (not shown in the figure). A synchronous belt (not shown in the figure) is fitted around the two synchronous pulleys. A drive motor 73 that drives the second screw 72 to rotate is fixedly installed on the frame 01.

[0038] Reference Figure 1 、 Figure 2 and Figure 3 When the laser head needs to move, the drive motor 73 starts. The drive motor 73 drives the first screw 71 and the second screw 72 to rotate synchronously through the transmission action of the synchronous pulley and synchronous belt. At this time, the first screw 71 drives the first moving plate 5 to move, and the second screw 72 drives the second moving plate 6 to move. Since the pitch of the second screw 72 is twice the pitch of the first screw 71, the moving speed of the laser cutting head 3 is twice that of the third reflecting mirror 213 and the fourth reflecting mirror 214. Let the moving distance of the third reflecting mirror 213 and the fourth reflecting mirror 214 be denoted as ΔL. Then, the moving distance of the laser cutting head 3 is 2ΔL. At this time, the optical path transmitted from the second reflector 212 to the third reflector 213 is L2--ΔL, and the optical path transmitted from the fourth reflector 214 to the laser cutting head 3 is L4+(2ΔL-ΔL). At this time, the optical path of the laser beam = L1+L2-ΔL+L3+L4+2ΔL-ΔL=L1+L2+L3+L4. Since the distance between the third reflector 213 and the fourth reflector 214 remains constant, L3 remains unchanged. Therefore, when the laser head moves, the optical path of the laser remains unchanged, thereby avoiding the influence of the change in the laser optical path on the shape of the spot and the energy density, and improving the quality of laser cutting.

[0039] Reference Figure 4 、 Figure 5 and Figure 6 To reduce the entry of external dust and impurities into the optical path system and avoid interference with laser transmission, protective shells 8 corresponding to the reflectors 21 are fixedly connected to the first moving plate 5 and the mounting plate 4. A mounting frame 9 is fixedly installed on the outer surface of each reflector 21 and is fixedly connected inside the protective shell 8. Each protective shell 8 has an entrance port 81 and a reflection port 82. The entrance port 81 and the reflection port 82 limit the propagation direction of the laser in the protective shell 8, prevent the laser from being scattered around the reflector 21 or deviating from the predetermined optical path, and ensure that the laser can be reflected at the correct angle and direction.

[0040] Reference Figure 4 、 Figure 5 and Figure 6To ensure the optical transmission performance of the reflector 21, a cleaning assembly 10 is provided in each mounting frame 9. Mounting cavities 91 are formed on the opposite inner sidewalls of each mounting frame 9, extending along the length of the mounting frame 9. The cleaning assembly 10 includes a lead screw 101 and a guide rod 102 respectively disposed within the mounting cavities 91. The lead screw 101 is rotatably connected to one mounting cavity 91, and the guide rod 102 is fixedly connected to the other mounting cavity 91. A connecting block 103 is threaded onto the lead screw 101, and a sliding connection is provided on the guide rod 102. There is a guide block 104, and a connecting rod 105 is rotatably connected inside the guide block 104 and the connecting block 103. A cleaning roller 106 is fixedly connected between the two connecting rods 105. The length direction of the cleaning roller 106 is perpendicular to the length direction of the mounting frame 9. A cleaning cotton 107 is sleeved on the outer surface of the cleaning roller 106. The cleaning cotton 107 is elastic. When the cleaning roller 106 moves above the reflector 21, the cleaning cotton 107 abuts against the outer surface of the reflector 21. A rotating assembly 11 for driving the lead screw 101 to rotate is provided on the first moving plate 5 and the mounting plate 4.

[0041] Reference Figure 4 、 Figure 5 and Figure 6 Both the first moving plate 5 and the mounting plate 4 have drive cavities (not shown in the figure). The rotating assembly 11 includes a worm gear 111 rotatably connected in the drive cavity. The end of each lead screw 101 extends into the mounting cavity 91 and is coaxially fixedly connected to a worm wheel 112. The worm wheel 112 meshes with the worm gear 111. The end of the worm gear 111 extends into the drive cavity and is coaxially fixedly connected to a drive motor 113. The drive motor 113 is electrically connected to the CNC system through the control system.

[0042] When the reflector 21 needs cleaning, the CNC system controls the drive motor 113 to start. The drive motor 113 drives the lead screw 101 to rotate through the transmission action of the worm gear 111 and the worm wheel 112. The rotation of the lead screw 101 drives the cleaning roller 106 to move along the length of the mounting frame 9. During the movement of the cleaning roller 106, the cleaning cotton 107 comes into contact with the surface of the reflector 21 to clean the dust and impurities on the surface of the reflector 21, thereby ensuring the cleanliness of the reflector 21. Compared with the traditional cleaning method, the setting of the cleaning component 10 and the rotating component 11 eliminates the need for cleaning personnel to remove the reflector 21 from the protective shell 8 for cleaning, avoiding the occurrence of fingerprint residue due to direct contact between human hands and the lens. At the same time, the cleaning cotton 107 maintains good contact and uniform wiping force with the surface of the reflector 21, ensuring that the contaminants on the surface of the reflector 21 are effectively removed, while avoiding damage to the reflector 21, ensuring that the optical performance of the reflector 21 is not affected, and thus improving the cutting quality.

[0043] Reference Figure 4 、 Figure 5 and Figure 6 A plurality of elastic capsules 12 are fixedly connected to the inner wall of each mounting cavity 91, and the plurality of elastic capsules 12 are evenly distributed along the length direction of the mounting frame 9. The outer walls of the plurality of elastic capsules 12 are interconnected through a liquid tube 121. Cleaning liquid is stored in each elastic capsule 12, and the cleaning liquid has the function of dissolving and removing stubborn pollutants such as oil, stains, etc. on the surface of the reflector 21. A liquid outlet nozzle 122 is fixedly installed on each elastic capsule 12, and the liquid outlet nozzle 122 is connected to the inside of the elastic capsule 12. The liquid outlet direction of the liquid outlet nozzle 122 is set toward the surface of the reflector 21. An extrusion component 13 for sequentially extruding the plurality of elastic capsules 12 is provided on the mounting frame 9.

[0044] Reference Figure 4 、 Figure 5 and Figure 6 The extrusion assembly 13 includes a gear 131 coaxially fixedly connected to the two connecting rods 105, and a rack plate 132 meshing with the gear 131 is fixedly connected to the inner wall of the two mounting cavities 91. A cam 133 is coaxially fixedly connected to the rod body of each connecting rod 105. The gear 131 and the cam 133 are both rotatably arranged in the mounting cavity 91. When the convex part of the cam 133 rotates toward the elastic capsule 12, the cam 133 squeezes the elastic capsule 12. When the convex part of the cam 133 rotates away from the elastic capsule 12, the cam 133 disengages from the elastic capsule 12.

[0045] In the process of the cleaning roller 106 moving along the length direction of the mounting frame 9, the cleaning roller 106 drives the connecting rod 105 to move, and the connecting rod 105 drives the gear 131 to move along the length direction of the rack plate 132. Since the gear 131 is meshed with the rack plate 132, the gear 131 rotates during the movement, and the rotation of the gear 131 drives the cam 133 to rotate around the connecting rod 105. When the raised end of the cam 133 rotates to face the elastic capsule 12, the cam 133 squeezes the elastic capsule 12, and the cleaning liquid in the elastic capsule 12 is sprayed onto the surface of the reflector 21 through the liquid outlet nozzle 122. When the cleaning sponge 107 contacts the cleaning liquid, the cleaning sponge 107 absorbs the cleaning liquid and evenly smears the cleaning liquid on the surface of the reflector 21 through the movement of the cleaning roller 106, so that the reflector 21 is cleaner, the reflection efficiency and beam quality of the laser are improved, and thus the cutting quality is improved; In addition, as the connecting rod 105 rotates, it drives the cleaning roller 106 to rotate, and the cleaning roller 106 drives the cleaning sponge 107 to rotate. During the rotation process, different parts of the cleaning sponge 107 contact the surface of the reflector 21 in turn, and the contact area between the cleaning sponge 107 and the reflector 21 is increased, thereby avoiding the possibility that dust on the surface of the reflector 21 accumulates at a specific position of the cleaning sponge 107 and reduces the cleaning effect of the cleaning sponge 107. In addition, the rotating cleaning sponge 107 increases the wiping force on the surface of the reflector 21, increases the possibility of removing stubborn dust and stains, and further improves the cleaning effect of the cleaning component 10.

[0046] Reference Figure 6 and Figure 7 A squeezing plate 14 for squeezing the cleaning cotton 107 is fixedly connected to the inner wall of the mounting frame 9. The end of the squeezing plate 14 facing the cleaning roller 106 is provided with a guide arc surface. When the axis of the cleaning roller 106 moves to the same height as the axis of the liquid accumulation plate, the squeezing plate 14 squeezes the cleaning cotton 107 to its minimum state. A receiving groove 92 is provided on the inner wall of the mounting frame 9. The length direction of the receiving groove 92 is parallel to the length direction of the cleaning roller 106. A liquid receiving plate 15 is slidably connected in the receiving groove 92. The liquid receiving plate 15 is T-shaped and has a liquid collection groove 151. The liquid collection tank 151 is inclined and is inclined from bottom to top along the direction away from the mounting frame 9. Liquid channels 152 communicating with the liquid collection tank 151 are opened on both sides of the liquid receiving plate 15. A filter screen (not shown in the figure) is fixedly connected to the liquid inlet end of the liquid channel 152 communicating with the liquid collection tank 151. The liquid outlet end of the liquid channel 152 is connected to the elastic bladder 12 on the same side through the return pipe 153. In order to accommodate the sliding of the liquid receiving plate 15 in the receiving tank 92, the return pipe 153 is a rubber corrugated pipe. A pop-out component 16 is provided in the receiving tank 92.

[0047] Reference Figure 6 and Figure 7 The pop-out component 16 includes an electromagnetic block 161 fixedly connected to the end of the receiving groove 92. A magnetic block 162 is fixedly embedded in the end of the liquid receiving plate 15 near the receiving groove 92. When the CNC system controls the electromagnetic block 161 to be energized, the electromagnetic block 161 attracts the magnetic block 162. A spring 163 is provided in the receiving groove 92. One end of the spring 163 is fixedly connected to the inner side wall of the receiving groove 92 near the electromagnetic block 161, and the other end is fixedly connected to the magnetic block 162. In the natural state of the spring 163, the liquid receiving plate 15 abuts against the end of the receiving groove 92 away from the electromagnetic block 161, and the liquid receiving plate 15 extends out of the receiving groove 92.

[0048] When the cleaning roller 106 needs to clean the reflector 21, the CNC system powers the electromagnetic block 161, and the electromagnetic block 161 attracts the magnetic block 162 onto the electromagnetic block 161. At this time, the spring 163 is compressed, and the liquid receiving plate 15 is embedded in the receiving groove 92. At this time, the liquid receiving plate 15 will not affect the cleaning process of the cleaning roller 106. When the CNC system de-energizes the electromagnetic block 161, the adsorption force on the spring 163 disappears, and the spring 163 resets, pushing the liquid receiving plate 15 to extend out of the receiving groove 92. At this time, the liquid receiving plate 15 is positioned on the cleaning roller 106. Simultaneously, as the rotating cleaning roller 106 continues to move, the squeezing plate 14 continuously squeezes the cleaning cotton. The residual cleaning liquid in the cleaning cotton is squeezed into the liquid collection tank 151 of the liquid receiving plate 15. Under the action of gravity, the squeezed cleaning liquid flows along the inclined direction of the liquid collection tank 151, flows into the liquid channel 152 after being filtered by the filter screen, and finally flows into the elastic bladder 12 through the return pipe 153. This setting realizes the automatic replenishment of cleaning liquid, ensuring that the volume of cleaning liquid in the elastic bladder 12 is sufficient, thereby ensuring the smooth spraying of cleaning liquid. At the same time, when the cleaning liquid in the elastic bladder 12 is consumed, the personnel can add cleaning liquid to the liquid collection tank 151 to realize the automatic replenishment of cleaning liquid.

[0049] The implementation principle of a laser cutting device according to an embodiment of this application is as follows: When the laser head needs to move, the drive motor 73 starts. The drive motor 73 drives the first screw 71 and the second screw 72 to rotate synchronously through the transmission action of the synchronous pulley and the synchronous belt. At this time, the first screw 71 drives the first moving plate 5 to move, and the second screw 72 drives the second moving plate 6 to move. Since the pitch of the second screw 72 is twice that of the first screw 71, the moving speed of the laser cutting head 3 is twice that of the third reflector 213 and the fourth reflector 214. At this time, the fourth reflector 213... The optical path distance between the laser cutting head 3 and the laser cutting head 14 increases, while the optical path distance between the second mirror 212 and the third mirror 213 decreases. At the same time, since the moving speed of the laser cutting head 3 is twice that of the third mirror 213 and the fourth mirror 214, the increased distance between the fourth mirror 214 and the laser cutting head 3 compensates for the decreased distance between the second mirror 212 and the third mirror 213. At this time, the total optical path of the laser remains unchanged, thereby avoiding the influence of the change in the laser optical path on the spot shape and energy density, and improving the quality of laser cutting.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A laser cutting device, comprising a stand (01), on which a laser generator (1), a laser head and an optical transmission component (2) are arranged, characterized in that: The optical transmission component (2) comprises four reflectors (21), the four reflectors (21) being arranged in sequence along the transmission direction of the optical path as a first reflector (211), a second reflector (212), a third reflector (213) and a fourth reflector (214), the first reflector (211) and the second reflector (212) being arranged at an end of the platform (01) close to the light beam outlet of the laser generator (1) via a mounting plate (4), the mirror surfaces of the first reflector (211) and the second reflector (212) being perpendicular to each other, the third reflector (213) being located at an end of the platform (01) far from the second reflector (212), and the third reflector (214) being arranged at an end of the platform (01) far from the second reflector (212). The mirror surfaces of the first reflector (213) and the fourth reflector (214) are perpendicular to each other, the light beam reflected by the fourth reflector (214) is transmitted to the laser head, the first movable plate (5) and the second movable plate (6) are slidably connected on the platform (01), the third reflector (213) and the fourth reflector (214) are arranged on the first movable plate (5), the laser head is arranged on the second movable plate (6), and the platform (01) is provided with a driving component (7), the driving component (7) drives the first movable plate (5) and the second movable plate (6) to move in the same direction, and the moving speed of the second movable plate (6) is twice the moving speed of the first movable plate (5).

2. The laser cutting device according to claim 1, characterized in that: The platform (01) is provided with a first sliding groove (011) and a second sliding groove (012); the driving assembly (7) comprises a first screw rod (71) and a second screw rod (72) which are rotatably connected in the first sliding groove (011) and the second sliding groove (012) respectively; one end of the first movable plate (5) is threadedly connected to the first screw rod (71), and the other end is rotatably connected to the second screw rod (72); one end of the second movable plate (6) is threadedly connected to the second screw rod (72), and the other end is rotatably connected to the first screw rod (71); the pitch of the second screw rod (72) is twice the pitch of the first screw rod (71); the ends of the first screw rod (71) and the second screw rod (72) are coaxially provided with synchronous wheels; the two synchronous wheels are jointly sleeved with a synchronous belt; and a driving motor (73) for driving the second screw rod (72) to rotate is provided on the platform (01).

3. The laser cutting device according to claim 1, characterized in that: The first movable plate (5) and the mounting plate (4) are provided with protective shells (8) corresponding to the reflectors (21) one by one, the outer surface of each reflector (21) is provided with a mounting frame (9), the mounting frame (9) is arranged inside the protective shell (8), and the protective shell (8) is provided with an incident port (81) and a reflecting port (82).

4. The laser cutting device according to claim 3, characterized in that: A cleaning assembly (10) is arranged in the installation frame (9), and installation cavities (91) are provided on opposite inner side walls of the installation frame (9). The cleaning assembly (10) comprises a screw rod (101) and a guide rod (102) respectively arranged in the installation cavities (91), the screw rod (101) is rotatably connected in one of the installation cavities (91), a connecting block (103) is threadedly connected to the screw rod (101), and a guide block (103) is slidably connected to the guide rod (102). (104), the guide block (104) and the connecting block (103) are both rotatably connected with a connecting rod (105), a cleaning roller (106) is arranged between the two connecting rods (105), the outer surface of the cleaning roller (106) is sleeved with a cleaning sponge (107), and the cleaning sponge (107) abuts against the outer surface of the reflecting mirror (21), and a rotating component (11) for driving the screw rod (101) to rotate is arranged on the first movable plate (5) and the mounting plate (4).

5. The laser cutting device according to claim 4, characterized in that: A plurality of elastic capsules (12) are arranged in each of the installation cavities (91), and the plurality of elastic capsules (12) are evenly and equidistantly distributed along the length direction of the installation frame (9). The plurality of elastic capsules (12) are connected via a liquid pipe (121), and a cleaning liquid is arranged in each of the elastic capsules (12). A liquid outlet nozzle (122) is arranged on each of the elastic capsules (121), and the liquid outlet direction of the liquid outlet nozzle (122) is arranged toward the surface of the reflector (21). The installation frame (9) is provided with an extrusion component (13) for sequentially extruding the plurality of elastic capsules (12).

6. The laser cutting device according to claim 5, characterized in that: The extrusion assembly (13) includes a gear (131) coaxially fixedly connected to the two connecting rods (105); a rack plate (132) meshing with the gear (131) is arranged in each of the two installation cavities (91); a cam (133) is coaxially fixedly connected to each of the connecting rods (105); the cam (133) is rotatably arranged in the installation cavity (91); when the convex portion of the cam (133) rotates toward the elastic capsule (12), the cam (133) squeezes the elastic capsule (12); when the convex portion of the cam (133) rotates away from the elastic capsule (12), the cam (133) is separated from the elastic capsule (12).

7. The laser cutting device according to claim 6, characterized in that: The inner wall of the installation frame (9) is provided with a squeezing plate (14) for squeezing the cleaning sponge (107), the inner wall of the installation frame (9) is provided with a receiving groove (92), a liquid receiving plate (15) is slidably connected in the receiving groove (92), a liquid collecting groove (151) is provided on the liquid receiving plate (15), the liquid collecting groove (151) is arranged obliquely, liquid channels (152) connected to the liquid collecting groove (151) are provided on opposite sides of the liquid receiving plate (15), a filter screen is provided at the liquid inlet end of the liquid channel (152), and the liquid outlet end is respectively connected to the elastic bag (12) on the same side through a liquid return pipe (153), and the liquid return pipe (153) is a corrugated pipe, and a pop-up component (16) for popping out the liquid receiving plate (15) is provided in the receiving groove (92).

8. The laser cutting device according to claim 7, characterized in that: The pop-up assembly (16) includes an electromagnetic block (161) arranged at the end of the receiving groove (92), and a magnetic block (162) is embedded in the end of the liquid receiving plate (15) close to the receiving groove (92). When the electromagnetic block (161) is energized, the electromagnetic block (161) adsorbs the magnetic block (162). A spring (163) is arranged in the receiving groove (92), one end of the spring (163) is arranged on the inner wall of the receiving groove (92), and the other end is arranged on the magnetic block (162). When the spring (163) is in a natural state, the liquid receiving plate (15) abuts against the end of the receiving groove (92) away from the electromagnetic block (161).

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