Laser plate cutting machine for metal plate machining

Abstract

The invention relates to the technical field of metal plate laser machining devices, in particular to a laser plate cutting machine for metal plate machining, which comprises a machine tool, a movable cross beam is slidably mounted at the upper end of the machine tool, a rack is movably mounted at the upper end of the movable cross beam, and a movable frame is slidably mounted at the inner end of the rack; a laser used for emitting laser is fixedly installed at the inner end of the movable frame, the bottom end of the laser is fixedly connected with a lens cone, a focusing head is detachably installed at the bottom end of the lens cone and used for emitting high-temperature laser flow, and a temperature rising device used for heating gas is installed in the heat uniformizing barrel. According to the integrated heat management system, the low-temperature protective gas is preheated while the flowing cooling liquid absorbs heat, so that the low-temperature protective gas reaches the working temperature, the integrated heat management system can effectively control the equipment temperature and guarantee stable operation, the influence of temperature difference fluctuation on the machining precision can be reduced, the service life of the equipment is prolonged, and the process quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal plate laser processing devices, in particular to a laser plate cutting machine for metal plate processing. 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 the melting point or boiling point. 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. When processing metal plates, a metal plate laser cutting machine is also required.

[0003] After searching, it was found that the prior art publication number is CN113843523A, which discloses a laser cutting machine, including a base frame, a laser, a driving device for controlling the movement of the laser, and a detachable platform structure. The detachable platform structure includes two symmetrically arranged local workbenches, each of which includes a rack, a side support plate and an adjustment plate. A supporting beam installed on the base frame is arranged between the two local workbenches, one end of the side support plate and the adjustment plate are detachably mounted on the base frame through a support assembly, and the other end is detachably connected to the supporting beam through a supporting plug plate. A plurality of racks are arranged across the two side support plates and are equidistantly arranged along the length direction of the side support plates and are installed on the adjustment plate. This solution is achieved by detachably connecting all components in the detachable platform structure. Even if the working platform needs local maintenance, there is no need to replace the entire working platform, and only the corresponding damaged components need to be replaced, which greatly saves maintenance costs and improves work.

[0004] Therefore, based on the above search and in combination with the existing technology, in the existing cutting equipment, when the shielding gas needs to be preheated and kept at a constant temperature, this increases the additional heating demand and improves the overall energy consumption. The shielding gas temperature of the existing equipment is greatly correlated with the ambient temperature, and the gas temperature fluctuation affects the cutting stability, especially in different seasons or different working environments, which may lead to inconsistent cutting effects. For this reason, the present application proposes a laser cutting machine for metal sheet processing. Summary of the invention

[0005] The object of the present invention is to provide a laser plate cutting machine for metal plate processing to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser cutting machine for processing metal plates, comprising a machine tool, a movable crossbeam is slidably installed on the upper end of the machine tool, and a frame is movably installed on the upper end of the movable crossbeam, a movable frame is slidably installed on the inner end of the frame, a laser for emitting laser is fixedly installed on the inner end of the movable frame, the bottom end of the laser is fixedly connected to a lens barrel, and a focusing head is detachably installed on the bottom end of the lens barrel for emitting high-temperature laser flow, a heat-uniforming cylinder is fixedly installed on the bottom end of the movable frame through a clamp, a jet pipe is fixedly installed on the bottom end of the heat-uniforming cylinder, and the outlet of the jet pipe faces below the focusing head, a heating device for heating the gas is installed inside the heat-uniforming cylinder, and an adjustment device is provided inside the lens barrel to adjust the laser focal length according to the cutting material.

[0007] As a further solution of the present invention, an output pipe for transmitting coolant is also provided inside the movable frame, and the output end of the output pipe is connected to the uniform heating cylinder. The coolant is transported to the uniform heating cylinder through the output pipe to achieve efficient heat transfer, effectively reduce the equipment temperature, and prevent overheating from affecting the processing accuracy and equipment life.

[0008] As a further solution of the present invention, the heating device includes an air guide cylinder, which is fixedly installed on the inner upper end of the uniform heating cylinder, and an air plug cover is fixedly installed on the upper end of the uniform heating cylinder. The output pipe is passed through the interior of the air plug cover, and the end of the air guide cylinder away from the air plug cover is fixedly connected to a compression cylinder. A liquid outlet pipe is provided at the bottom end of the compression cylinder, and the liquid outlet pipe is connected to the output pipe. The output pipe is passed through the interior of the air plug cover, so that the coolant can smoothly enter the uniform heating cylinder and be evenly transmitted through the air guide cylinder and the compression cylinder, thereby ensuring that the coolant is distributed more evenly and improving the cooling effect.

[0009] As a further solution of the present invention, an isolation plate is provided on the side of the compression cylinder away from the air plug cover, the isolation plate is fixedly connected to the heat uniforming cylinder, the end of the isolation plate away from the compression cylinder is fixedly connected to a heat conduction pipe, the outer surface of the heat conduction pipe is wound with a heat conduction air pipe, and by winding the heat conduction air pipe on the outer surface of the heat conduction pipe, the cooling system can make full use of the heat, achieve more uniform heat conduction, improve the overall temperature control effect, and avoid local overheating or insufficient cooling.

[0010] As a further solution of the present invention, one end of the heat-conducting air pipe away from the isolation plate is connected to the injection pipe, the outer surface of the lens barrel is provided with cooling fins, and a cooling pipe is passed through the interior of the cooling fins, the input end of the cooling pipe is fixedly connected to the output end of the heat-uniform tube, and the output end of the cooling pipe is connected to the input end of the heat-uniform tube. By arranging cooling fins on the outer surface of the lens barrel and passing a cooling pipe therein, the heat dissipation area is greatly increased, the heat transfer efficiency is improved, the equipment temperature is effectively reduced, and long-term stable operation is ensured.

[0011] As a further solution of the present invention, a bimetallic spiral piece is fixedly installed on the inner bottom end of the heat pipe, a driving block is rotatably installed on the inner end of the heat pipe, and the end of the bimetallic spiral piece close to the isolation plate is fixedly connected to the driving block, and a movable cylinder is passed through the inner end of the heat pipe. Due to the thermal expansion and contraction characteristics of the bimetallic spiral piece, it is deformed at different temperatures, driving the driving block to rotate, thereby dynamically adjusting the fluid flow state in the heat pipe, improving the heat exchange efficiency, and ensuring that the cooling or heating system is always in the best working state.

[0012] As a further solution of the present invention, a screw is fixedly connected to the upper end of the driving block, and the movable cylinder is threadedly sleeved on the outer surface of the screw. The liquid outlet pipe and the outer surface of the movable cylinder are both provided with rectangular liquid outlet holes, and the liquid outlet holes of the two correspond to each other. Through the threaded connection structure of the movable cylinder and the screw, the axial position of the movable cylinder can be adjusted so that the rectangular liquid outlet holes on its outer surface and the liquid outlet holes of the liquid outlet pipe are staggered or aligned with each other, thereby accurately controlling the liquid outlet flow rate, meeting the requirements of different working conditions, and improving the stability of fluid transportation.

[0013] As a further solution of the present invention, the adjusting device includes a conduction tube, which is passed through the interior of the lens barrel, a driving rod is passed through the inner end of the conduction tube, a plurality of heat-conducting plates are slidably installed on the inner end of the lens barrel, a lens is provided inside the lens barrel, and the bottom end of the conduction tube is fixedly connected to a liquid outlet cylinder, and the output end of the liquid outlet cylinder is located at the bottom.

[0014] As a further solution of the present invention, the liquid outlet tube is arranged inside a plurality of heat-conducting plates, and reflux holes are provided on the outer surfaces of the heat-conducting plates. A reflux groove is provided inside the lens barrel, and the reflux groove corresponds to the reflux hole. The liquid outlet tube is arranged inside a plurality of heat-conducting plates, and the efficient conduction effect of the heat-conducting plates helps to quickly transfer heat from the equipment, thereby improving the overall heat dissipation effect.

[0015] As a further solution of the present invention, a driving cylinder is passed through the bottom end of the conduction tube, and through holes are opened on the outer surfaces of the heat conducting plates. The driving cylinder is passed through the through holes, and a driving screw is threadedly sleeved on the inner end of the driving cylinder, and the driving screw is fixedly connected to the driving rod. A plurality of push baffles are fixedly installed on the outer surface of the driving cylinder, and the push baffles and the heat conducting plates are staggered with each other.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses the heat exchange design of the lens barrel to make the coolant flowing through absorb heat while preheating the cryogenic protective gas to reach the working temperature. The integrated thermal management system can effectively control the equipment temperature to ensure stable operation and reduce the impact of temperature fluctuations on processing accuracy, thereby extending the service life of the equipment and improving the process quality. 2. When the present invention is working, the preheated protective gas can significantly improve the cutting efficiency and processing stability of highly reflective and thick materials. At the same time, it can still maintain a suitable temperature for low-reflective materials to ensure processing quality. The waste heat of the reflux gas in the recycling cooling pipe is used for heating without the need for an additional heat source, which not only reduces energy consumption but also improves the overall thermal energy utilization efficiency, thereby achieving optimal thermal matching under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a laser cutting machine for metal plate processing; Figure 2 It is a schematic diagram of the structure inside the rack; Figure 3 This is a disassembled diagram of the rack; Figure 4 It is a schematic diagram of the structure inside the uniform heat cylinder; Figure 5 It is a schematic diagram of the structure inside the heat pipe; Figure 6 Schematic diagram of the structure inside the liquid outlet pipe; Figure 7 It is a structural schematic diagram of the position relationship between the heat-uniform tube and the air guide cover; Figure 8 It is a schematic diagram of the structure inside the compression cylinder; Fig. 9 It is the relationship diagram of the position of the lens barrel and the focusing head; Fig.10 Schematic diagram of the internal structure of the lens barrel; Fig.11 Schematic diagram of the heat conducting sheet structure.

[0018] In the figure: 1. machine tool; 2. movable crossbeam; 3. frame; 101, cable; 102, movable frame; 103, laser; 104, heat sink fin; 105, focusing head; 106, jet tube; 107, uniform heating tube; 108, adjustment motor; 109, vertical screw rod; 110, return pipe; 111, output pipe; 112, stepping motor; 201, air plug cover; 202, air guide cylinder; 203, compression cylinder; 204, liquid outlet pipe; 205, transfer pipe; 206, isolation plate; 207, heat pipe; 208, heat pipe; 209, bimetallic spiral sheet; 210, driving block; 211, movable cylinder; 212, screw; 213, liquid outlet hole; 301, air guide cover; 302, passive turbofan; 303, compression chamber; 401, cooling tube; 402, driving rod; 403, conduction tube; 404, lens barrel; 405, connecting tube; 406, heat conducting plate; 407, lens; 408, reflux groove; 409, driving tube; 410, pushing baffle; 411, reflux hole; 412, liquid outlet tube; 413, driving screw. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in 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] Example 1: Please refer to Figure 1 - Figure 3 A laser plate cutting machine for metal plate processing includes a machine tool 1, a movable crossbeam 2 is slidably installed on the upper end of the machine tool 1, and a frame 3 is movably installed on the upper end of the movable crossbeam 2. Specifically, a servo drive device is provided inside the machine tool 1 and the movable crossbeam 2 to respectively realize the forward and backward movement of the movable crossbeam 2 and the left and right movement of the frame 3. The drive device is an existing mature technology, and the specific device and working principle are not described in detail here. A movable frame 102 is slidably installed on the inner end of the frame 3, and the inner end of the movable frame 102 is fixedly installed with a clamp A laser 103 for emitting laser light, the bottom end of the laser 103 is fixedly connected to a lens barrel 404, and a focusing head 105 is detachably mounted on the bottom end of the lens barrel 404, and is used to emit a high-temperature laser stream. A uniform heating barrel 107 is fixedly mounted on the bottom end of the movable frame 102 through a clamp, and an air jet 106 is fixedly mounted on the bottom end of the uniform heating barrel 107, and an emission port of the air jet 106 faces the laser cutting position. The gas ejected from the air jet 106 is a protective gas (the type of protective gas is not unique), which has the effect of reducing spatter, stabilizing the molten pool, and preventing oxidation of the incision; A heating device for heating the gas is installed inside the uniform heating cylinder 107, and an adjusting device is provided inside the lens barrel 404 to adjust the focal length of the laser according to the cutting material.

[0021] The inner end of the frame 3 is fixedly installed with an adjusting motor 108 by bolts, the output end of the adjusting motor 108 is fixedly connected with a vertical screw rod 109, the movable frame 102 is threadedly sleeved on the outer surface of the vertical screw rod 109, and the output end of the adjusting motor 108 drives the vertical screw rod 109 to rotate, thereby driving the movable frame 102 to move up and down (Z axis); Specifically, a cable 101 is provided at the upper end of the rack 3, and the cable 101 is used to provide power to various electrical appliances inside the rack 3. An output pipe 111 for transmitting coolant is also provided inside the movable rack 102, and the output end of the output pipe 111 is connected to the uniform heating cylinder 107. Specifically, the output pipe 111 is provided with two output ports, one of which is connected to the uniform heating cylinder 107, and the other is connected to the lens barrel 404.

[0022] See also Figure 2 , Figure 3 , Fig. 9 The temperature raising device comprises an air guide cylinder 202, which is fixedly mounted on the inner upper end of the uniform heating cylinder 107, and an air plug cover 201 is fixedly mounted on the upper end of the uniform heating cylinder 107. The output pipe 111 is passed through the inside of the air plug cover 201, and one end of the air guide cylinder 202 away from the air plug cover 201 is fixedly connected to a compression cylinder 203, and a liquid outlet pipe 204 is arranged at the bottom end of the compression cylinder 203, and the liquid outlet pipe 204 is connected to the output pipe 111; An isolation plate 206 is provided on one side of the compression cylinder 203 away from the air plug cover 201. The isolation plate 206 is fixedly connected to the uniform heat cylinder 107. A heat conducting pipe 207 is fixedly welded to one end of the isolation plate 206 away from the compression cylinder 203. The heat conducting pipe 207 is passed through the interior of the uniform heat cylinder 107. A heat conducting air pipe 208 is wound on the outer surface of the heat conducting pipe 207. The heat conducting air pipe 208 is spirally wound on the outer surface of the heat conducting pipe 207. Both are made of metal and have good thermal conductivity. The structure makes the contact area between the heat-conducting air pipe 208 and the heat-conducting air pipe 207 larger, and the end of the heat-conducting air pipe 208 away from the isolation plate 206 is connected to the air injection pipe 106, the outer surface of the lens barrel 404 is sleeved with a heat dissipation fin 104, and the interior of the heat dissipation fin 104 is penetrated by a cooling pipe 401, the cooling pipe 401 is spirally wound, the input end of the cooling pipe 401 is fixedly connected to the output end of the uniform heat barrel 107, and the output end of the cooling pipe 401 is connected to the input end of the uniform heat barrel 107; Specifically, the isolation plate 206 divides the interior of the uniform heating cylinder 107 into two upper and lower chambers, wherein the input end of the cooling tube 401 is connected to the chamber above the isolation plate 206, and the output end is connected to the chamber below the isolation plate 206. A gas supply device (not shown in the figure) for providing protective gas is also provided on the outside of the machine tool 1. This device is an existing mature technology, and the specific working principle is not elaborated here. The upper end of the gas plug cover 201 is fixedly connected to an air pipe, and the air pipe is connected to the output end of the gas supply device.

[0023] Example 2: Please refer to Figure 4 - Figure 8, a laser plate cutting machine for metal plate processing, based on the basis of embodiment 1, a bimetallic spiral piece 209 is fixedly installed at the inner bottom end of the heat pipe 207, and the bimetallic spiral piece 209 is composed of two metals with different expansion coefficients, which is an existing mature technology and will not be described in detail here. A driving block 210 is rotatably installed at the inner end of the heat pipe 207, and one end of the bimetallic spiral piece 209 close to the isolation plate 206 is fixedly connected to the driving block 210, and a movable cylinder 211 is passed through the inner end of the heat pipe 207, and the movable cylinder 211 The outer surface of the movable cylinder 211 is sleeved with a sealing rubber ring, which fits tightly with the inner wall of the heat conducting pipe 207 to improve the sealing performance. Specifically, a rectangular groove is provided on the outer surface of the movable cylinder 211, and a rectangular block is fixedly installed at the inner end of the heat conducting pipe 207. The rectangular block is arranged in the rectangular groove to prevent the movable cylinder 211 from rotating. In addition, two limiting rings are fixedly welded to the inner end of the liquid outlet pipe 204. The two limiting rings are respectively located at the upper and lower sides of the movable cylinder 211, so that the movable cylinder 211 can only move freely up and down in the space between the two limiting rings. like Figure 5 , Figure 6 As shown, a screw 212 is fixedly welded to the upper end of the driving block 210, and a movable cylinder 211 is threadedly sleeved on the outer surface of the screw 212. Rectangular liquid outlet holes 213 are provided on the outer surfaces of the liquid outlet pipe 204 and the movable cylinder 211, and the liquid outlet holes 213 of the two correspond to each other. When the movable cylinder 211 contacts the lower limiting ring, the two liquid outlet holes 213 are staggered to expose a smaller aperture. As the movable cylinder 211 moves upward, the aperture gradually increases. When the movable cylinder 211 contacts the upper limiting ring, the two liquid outlet holes 213 are completely horizontally aligned.

[0024] An end of the air guide cylinder 202 close to the isolation plate 206 is fixedly connected with an air guide cover 301, and a passive turbofan 302 is rotatably installed on the inner end of the air guide cover 301. The passive turbofan 302 is divided into two layers, and the inner layer and the outer layer are separated by an isolation tube. The passive turbofan 302 located in the inner layer corresponds to the output pipe 111. The isolation tube and the air guide cover 301 are separated by a sealing bearing, so that the liquid flowing inside the output pipe 111 is completely separated from the gas flowing inside the air guide cover 301. The air guide cover 301 is connected to the heat-conducting gas pipe 208 through a transfer pipe 205. Specifically, the compression cylinder 203 is "hourglass-shaped", that is, it is thin in the middle and thick at both ends. The central part of the compression cylinder 203 is used for the flow of liquid. A plurality of compression chambers 303 are provided at the inner end of the compression cylinder 203. The plurality of compression chambers 303 are arranged in a ring shape, and the space at the center is smaller than the space at both ends, so that the air is compressed when flowing through, and then the pressure is quickly released, resulting in a decrease in the gas temperature under the adiabatic expansion refrigeration effect (Joule-Thomson effect). The compression cylinder 203 is made of metal and has good thermal conductivity. A plurality of through grooves are provided on the outer surface of the compression cylinder 203, so that the liquid can have more contact area with the compression cylinder 203, thereby improving the efficiency of heat conduction.

[0025] See also Figure 3 , Fig. 9 - Fig.11 The adjusting device includes a conducting tube 403, which is inserted into the interior of the lens barrel 404. A driving rod 402 is inserted into the inner end of the conducting tube 403. A stepping motor 112 is provided at the upper end of the lens barrel 404. The output end of the stepping motor 112 is fixedly connected to the driving rod 402. A connecting tube 405 is detachably installed at one end of the lens barrel 404 close to the focusing head 105. The bottom end of the connecting tube 405 is inserted into the interior of the focusing head 105. The inner end of the lens barrel 404 is slidably installed with a plurality of A heat conducting sheet 406 is provided, a lens 407 is provided inside the lens barrel 404, an active chamber is opened inside the lens barrel 404, the heat conducting sheet 406 is arranged in the active chamber, and the lens 407 is connected to the lowest heat conducting sheet 406. Specifically, a metal sleeve is further provided on the outer surface of the lens 407, and a plurality of heat conducting sheets 406 are all provided on the outer surface of the metal sleeve, and a sealing rubber ring is provided on the outer surface of the metal sleeve, and is fitted with the inner wall of the lens barrel 404 to prevent liquid from splashing onto the outer surface of the lens 407; like Fig. 9 - Fig.11 As shown, the outer surface of the heat conducting sheet 406 is provided with a reflux hole 411, the interior of the lens barrel 404 is provided with a reflux groove 408, the reflux groove 408 corresponds to the reflux hole 411, the bottom end of the conduction tube 403 is fixedly connected with a liquid outlet cylinder 412, the liquid outlet cylinder 412 is penetrated in the interior of a plurality of heat conducting sheets 406, the output end of the liquid outlet cylinder 412 is located at the bottom, the length of the liquid outlet cylinder 412 is greater than the maximum distance that the heat conducting sheet 406 moves, the bottom end of the conduction tube 403 is penetrated with a driving cylinder 409, the outer surface of the heat conducting sheet 406 is provided with a through hole, the driving cylinder 409 is penetrated in the through hole, the inner end of the driving cylinder 409 is threadedly sleeved with a driving screw 413, and the driving screw 413 is fixedly connected to the driving rod 402; A plurality of push baffles 410 are fixedly mounted on the outer surface of the driving cylinder 409. The push baffles 410 and the heat conductive sheets 406 are interlaced with each other. The heat conductive sheets 406 can move freely between two adjacent push baffles 410. Specifically, the heat conductive sheet 406 at the bottom is fixedly connected to the driving cylinder 409. When the driving cylinder 409 moves downward and drives the bottom heat conductive sheet 406 to move downward, the metal sleeve also moves downward. As the area of ​​the metal sleeve exposed in the movable chamber increases, the contact area of ​​the remaining heat conductive sheets 406 with it increases, thereby increasing the heat dissipation area. The focusing head 105 is also provided with multiple sets of lenses 407 for further amplifying the energy of the laser beam.

[0026] like Figure 2 , Figure 3As shown, the outer surface of the uniform heat cylinder 107 is fixedly connected with a return pipe 110, the return pipe 110 is connected to the chamber below the isolation plate 206, and the return pipe 110 is connected to the return groove 408. The interior of the frame 3 is provided with a laser cooling system (not shown in the figure) for dissipating the heat of the coolant. The specific working principle of the device is an existing mature technology and will not be elaborated here. The output pipe 111 is fixedly connected to the output end of the laser cooling system through a three-way pipe, and the return pipe 110 is also fixedly connected to the input end of the laser cooling system through a three-way pipe, wherein the other output end of the output pipe 111 is connected to the conduction pipe 403.

[0027] The working principle of the present invention is: When in use, the metal sheets to be cut are placed on the machine tool 1 in sequence, and the X-axis and the Y-axis drive the focusing head 105 to the top of the sheet to be cut. With the start-up of the laser 103, the emitted laser is focused by the lens 407, and then a high-temperature laser beam is emitted to cut the sheet. The protective gas enters from the gas plug cover 201 and comes to the inside of the compression cylinder 203 through the gas guide cylinder 202. When passing through the compression chamber 303, the gas temperature is reduced under the adiabatic expansion refrigeration effect, so that the coolant flowing through the outer surface of the compression cylinder 203 is cooled again. The high temperature of the outer surface of the lens barrel 404 will keep a constant temperature as the coolant in the cooling tube 401 flows. When the protective gas passes through the passive turbofan 302, the passive turbofan 302 also rotates, so that the coolant in the output tube 111 flows faster. Since the absorption rate of laser by different materials (such as copper and steel) is significantly different, it is necessary to adjust the focal length of the lens 407 to optimize the light spot, so the working temperature also increases. The output end of the stepper motor 112 drives the driving rod 402 to rotate, so that the driving screw 413 drives the driving cylinder 409 to move downward, so that the metal sleeve also moves downward. As the area of ​​the metal sleeve exposed in the active chamber increases, the contact area of ​​the remaining multiple heat conducting plates 406 with it increases, thereby increasing the heat dissipation area. The coolant passes through the reflux hole 411 to the reflux groove 408 and then flows back to the laser cooling system. As the temperature rises, the bimetallic spiral sheet 209 is heated and twisted. The screw 212 is driven to rotate by the driving block 210, so that the active cylinder 211 moves upward, so that the volume of the coolant flowing through the outlet hole 213 becomes larger, so that it can take away more heat, so that a stable working temperature can be maintained during the laser cutting process. Since the temperature of the gas flowing back from the cooling pipe 401 to the chamber below the isolation plate 206 is higher than the ambient temperature, the heat conducting gas pipe 208 is heated, and the protective gas flowing inside is also heated accordingly. Since the gas flows too fast, the temperature of the sprayed protective gas is higher than the temperature when it is stored. For the cutting of highly reflective materials or thicker materials, a higher temperature gas is required to help blow away the slag and preheat the plate. For low-reflective materials, the required power is lower and the working temperature is also lower. At this time, the temperature of the sprayed protective gas will not be too high, and therefore will not affect normal operations.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser cutting machine for metal plate processing, comprising a machine tool (1), characterized in that: A movable crossbeam (2) is slidably mounted on the upper end of the machine tool (1), and a frame (3) is movably mounted on the upper end of the movable crossbeam (2); a movable frame (102) is slidably mounted on the inner end of the frame (3); a laser (103) for emitting laser light is fixedly mounted on the inner end of the movable frame (102); the bottom end of the laser (103) is fixedly connected to a lens barrel (404), and a focusing head (105) is detachably mounted on the bottom end of the lens barrel (404); a uniform heating cylinder (107) is fixedly mounted on the bottom end of the movable frame (102) via a clamp; an air jet (106) is fixedly mounted on the bottom end of the uniform heating cylinder (107), and an outlet of the air jet (106) faces below the focusing head (105); a heating device for heating gas is mounted inside the uniform heating cylinder (107); and an adjustment device is arranged inside the lens barrel (404) so ​​as to adjust the focal length of the laser according to the cutting material.

2. A laser cutting machine for metal sheet processing according to claim 1, characterized in that: An output pipe (111) for transmitting cooling liquid is also provided inside the movable frame (102), and an output end of the output pipe (111) is connected to the uniform heating cylinder (107).

3. A laser cutting machine for metal plate processing according to claim 2, characterized in that: The temperature raising device comprises an air guide cylinder (202), the air guide cylinder (202) being fixedly mounted on the inner upper end of the uniform heating cylinder (107), an air plug cover (201) being fixedly mounted on the upper end of the uniform heating cylinder (107), the output pipe (111) being passed through the interior of the air plug cover (201), an end of the air guide cylinder (202) away from the air plug cover (201) being fixedly connected to a compression cylinder (203), a liquid outlet pipe (204) being provided at the bottom end of the compression cylinder (203), and the liquid outlet pipe (204) being in communication with the output pipe (111).

4. A laser plate cutting machine for metal plate processing according to claim 3, characterized in that: An isolation plate (206) is provided on a side of the compression cylinder (203) away from the air plug cover (201); the isolation plate (206) is fixedly connected to the heat-uniform cylinder (107); one end of the isolation plate (206) away from the compression cylinder (203) is fixedly connected to a heat-conducting pipe (207); a heat-conducting air pipe (208) is wound around the outer surface of the heat-conducting pipe (207).

5. The laser cutting machine for metal plate processing according to claim 4, characterized in that: One end of the heat-conducting air pipe (208) away from the isolation plate (206) is connected to the air injection pipe (106); the outer surface of the lens barrel (404) is provided with a heat dissipation fin (104); and a cooling pipe (401) is passed through the interior of the heat dissipation fin (104); the input end of the cooling pipe (401) is fixedly connected to the output end of the uniform heat barrel (107); and the output end of the cooling pipe (401) is connected to the input end of the uniform heat barrel (107).

6. A laser plate cutting machine for metal plate processing according to claim 5, characterized in that: A bimetallic spiral sheet (209) is fixedly mounted on the inner bottom end of the heat conducting pipe (207), a driving block (210) is rotatably mounted on the inner end of the heat conducting pipe (207), and one end of the bimetallic spiral sheet (209) close to the isolation plate (206) is fixedly connected to the driving block (210), and a movable cylinder (211) is passed through the inner end of the heat conducting pipe (207).

7. The laser cutting machine for metal plate processing according to claim 6, characterized in that: The upper end of the driving block (210) is fixedly connected to a screw rod (212), the movable cylinder (211) is threadedly sleeved on the outer surface of the screw rod (212), and the outer surfaces of the liquid outlet pipe (204) and the movable cylinder (211) are both provided with rectangular liquid outlet holes (213), and the liquid outlet holes (213) of the two correspond to each other.

8. The laser cutting machine for metal plate processing according to claim 1, characterized in that: The regulating device comprises a conduction tube (403), the conduction tube (403) is inserted into the interior of the lens barrel (404), a driving rod (402) is inserted into the inner end of the conduction tube (403), a plurality of heat conducting plates (406) are slidably mounted on the inner end of the lens barrel (404), a lens (407) is provided inside the lens barrel (404), and a liquid outlet cylinder (412) is fixedly connected to the bottom end of the conduction tube (403), and an output end of the liquid outlet cylinder (412) is located at the bottom.

9. A laser plate cutting machine for metal plate processing according to claim 8, characterized in that: The liquid outlet cylinder (412) is inserted into the interior of a plurality of heat conducting plates (406), the outer surfaces of the heat conducting plates (406) are each provided with a reflux hole (411), and the interior of the lens barrel (404) is provided with a reflux groove (408), and the reflux groove (408) corresponds to the reflux hole (411).

10. The laser cutting machine for metal plate processing according to claim 9, characterized in that: A driving cylinder (409) is inserted through the bottom end of the conduction tube (403), and through holes are provided on the outer surfaces of the heat conducting plates (406). The driving cylinder (409) is inserted into the through holes. A driving screw (413) is threadedly sleeved on the inner end of the driving cylinder (409), and the driving screw (413) is fixedly connected to the driving rod (402). A plurality of push baffles (410) are fixedly mounted on the outer surface of the driving cylinder (409), and the push baffles (410) and the heat conducting plates (406) are interlaced with each other.

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