Low-loss heavy rare-earth magnetic steel sheet laser cutting machine

Abstract

The present application relates to the technical fields of laser cutting, and especially relates to a low-loss heavy rare earth magnetic steel sheet laser cutting machine, which comprises a frame, a rotating shaft, a chain wheel, a chain, a sawtooth support bar, a first electric sliding rail, a second electric sliding rail, a pneumatic cylinder, a mounting plate, a laser cutting machine and the like; the frame is symmetrically provided with rotating shafts on the left and right sides, the rotating shafts are provided with chain wheels at the front and back ends, chains are wound between the left and right adjacent two chain wheels, the sawtooth support bars are arranged at intervals between the two chains, and the frame is provided with a driving motor capable of driving one of the rotating shafts to rotate. The present application realizes the accurate positioning of the heavy rare earth magnetic steel sheet through the intermittent transmission of the sawtooth support bar and the chain and the mechanical linkage of the material blocking assembly, effectively solves the cutting deviation problem caused by the displacement of the sheet in the traditional cutting, and significantly reduces the material loss; at the same time, the rectangular frame and the folded elastic sleeve form a dynamic sealing space under the driving of the pneumatic cylinder, and cooperate with the inert gas replacement of the air inlet pipe and the air outlet pipe.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and in particular to a low-loss heavy rare earth magnet thin sheet laser cutting machine. Background Technology

[0002] Rare earth magnets, with their excellent magnetic properties and high cost-effectiveness, are widely used in new energy vehicles, communication electronics, industrial motors, medical devices, wind power generation, and aerospace. However, these materials are hard and brittle, and traditional machining methods generally suffer from problems such as thermal damage, edge chipping, demagnetization due to processing stress, high material loss, and numerous processes, making it difficult to meet the growing demand for high-precision, low-loss processing. Laser cutting technology, due to its advantages such as non-contact processing, narrow kerf, high precision, small heat-affected zone, and no mechanical processing stress, is considered an effective way to replace traditional cutting methods. Existing laser cutting equipment is used for cutting rare earth materials, employing dual-drive high-precision laser cutting machines suitable for various metal materials such as neodymium iron boron, nickel sheets, and magnetic materials. Some solutions also integrate automatic loading and unloading devices, three-dimensional walking devices, and gas cooling protection devices to achieve automated cutting of sheet-like rare earth permanent magnet alloy materials.

[0003] However, the high temperatures generated by existing laser cutting cause severe oxidation reactions in rare earth elements, producing a large amount of oxides in the remelted layer and heat-affected zone, leading to a decrease in the magnetic properties of the material. Although using inert gases such as nitrogen to assist cutting can effectively reduce oxidation, existing equipment mostly uses open or simple gas hood protection, making it difficult to create a stable, low-oxygen sealed protective environment in the cutting area. Therefore, it is necessary to design a low-loss heavy rare earth magnet thin-film laser cutting machine that can dynamically seal inert gas protection to solve the above-mentioned technical problems. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a low-loss heavy rare earth magnet thin sheet laser cutting machine.

[0005] The technical implementation scheme of the present invention is as follows: a low-loss heavy rare earth magnet thin sheet laser cutting machine, comprising a frame, a rotating shaft, sprockets, chains, serrated support bars, a first electric slide rail, a second electric slide rail, a cylinder, a mounting plate, a laser cutter, a shielding component, and a material blocking component. The frame has symmetrically rotatably mounted rotating shafts on its left and right sides. Sprockets are mounted at both ends of the rotating shafts. A chain is wound between two adjacent sprockets on the left and right sides, and serrated support bars are spaced apart between the two chains. A drive motor capable of rotating one of the rotating shafts is mounted on the frame. First electric slide rails are mounted at the front and rear of the top of the frame. A second electric slide rail is mounted between the sliders on the two first electric slide rails. A cylinder is mounted on the slider of the second electric slide rail. A mounting plate is mounted at the bottom of the cylinder's telescopic rod. The laser cutter is mounted at the bottom of the mounting plate. A shielding component is slidably mounted in the middle of the frame. A material blocking component for shielding and limiting the rare earth magnet thin sheet is mounted on the right side of the shielding component.

[0006] Furthermore, the shielding assembly includes guide posts, connecting plates, rectangular frames, U-shaped brackets, L-shaped blocks, air inlet pipes, air outlet pipes, solenoid valves, and folding elastic sleeves. Rectangular slots are opened in the middle of the side walls of the two adjacent frames. Guide posts are symmetrically arranged at the bottom of the rectangular slots of the frames. Connecting plates are slidably arranged between two adjacent guide posts. A rectangular frame is arranged between the two connecting plates. A horizontal sliding groove is opened in the middle of the front and rear side walls of the rectangular frame. A U-shaped bracket is slidably arranged between two sliding grooves. L-shaped blocks are arranged on both sides of the mounting plate. The bottom horizontal plate of the L-shaped block cooperates with the U-shaped bracket. The laser cutter passes through the horizontal hole of the U-shaped bracket. Air inlet pipes are symmetrically connected to the right side wall of the rectangular frame, and air outlet pipes are connected to the middle of the left side wall of the rectangular frame. Solenoid valves are installed on both the air inlet and outlet pipes. The upper part of the folding elastic sleeve is fixedly connected to the cylinder housing, and the lower part of the folding elastic sleeve is fixedly connected to the top of the rectangular frame.

[0007] Furthermore, the material blocking assembly includes a guide sleeve, a sliding shaft, a baffle, a limiting block, a pressure sensor, and a strip plate. Guide sleeves are symmetrically arranged on the left side wall of the rectangular frame. A sliding shaft is slidably arranged inside the guide sleeve. A baffle is arranged between the bottoms of the two sliding shafts. A limiting block is arranged at the top of the sliding shaft. Pressure sensors are spaced apart at the bottom of the baffle. A strip plate is slidably arranged on the right side of the bottom of the baffle. The left side wall of the strip plate is in contact with the pressure sensor.

[0008] Furthermore, it also includes a control panel, which is installed on the front side wall of the frame. The control panel has a built-in controller, which is connected to the drive motor, the first electric slide rail, the second electric slide rail, the cylinder, the laser cutter, the solenoid valve, and the pressure sensor via wiring.

[0009] Furthermore, it also includes an air pump, an air intake pipe, and an air exhaust pipe. An air pump is installed on the upper part of the L-shaped block on the right side. The air intake end of the air pump is connected to the air intake pipe, and the air exhaust end of the air pump is connected to the air exhaust pipe, which is directed towards the laser cutting machine.

[0010] Furthermore, it also includes a filter, with a filter installed at the end of the suction pipe.

[0011] Furthermore, multiple shallow transverse grooves are evenly opened on the top surface of the serrated support strip, and ceramic anti-slip strips are embedded in the shallow grooves. The surface of the ceramic anti-slip strips is treated with a matte anti-slip finish to increase the friction with the thin sheet of heavy rare earth magnets and prevent the sheet from slipping and shifting during transportation. The ceramic anti-slip strips are resistant to high temperatures and do not undergo electrochemical corrosion with rare earth materials.

[0012] Furthermore, the jet pipe is designed as a universally adjustable bend, with a locking knob in the middle; loosening the locking knob allows for arbitrary adjustment of the jet pipe's outlet direction, while the locking knob fixes the angle, enabling targeted spraying of cooling inert gas at the laser cut during cutting. Beneficial effects

[0013] 1. This invention achieves precise positioning of heavy rare earth magnet sheets through the intermittent transmission of the serrated support bar and chain combined with the mechanical linkage of the material blocking component. This effectively solves the cutting deviation problem caused by sheet displacement in traditional cutting and significantly reduces material loss. At the same time, the rectangular frame and the folded elastic sleeve form a dynamic sealed space under the drive of the cylinder. Combined with the inert gas replacement of the air inlet and outlet pipes, a stable low-oxygen protective environment can be built in the cutting area, which inhibits the oxidation and burning of heavy rare earth elements at high temperatures from the source. Compared with conventional open or simple air-shrouded cutting, the thickness of the oxide layer on the magnet surface is reduced, which greatly improves the yield and magnetic property retention rate of heavy rare earth magnets.

[0014] 2. This invention enables the cutting head to move flexibly along a preset trajectory within a sealed space through the coordinated movement of the laser cutting machine, the guide frame, the straight slide, and the electric slide rail. At the same time, the circulating purification system consisting of the air pump, filter, and jet pipe promptly absorbs and directionally blows and cools the cutting fumes, thus avoiding contamination of the laser lens by the fumes. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0017] Figure 3 This is a three-dimensional structural diagram of the shielding component of the present invention.

[0018] Figure 4 This is a partial three-dimensional structural diagram of the shielding component of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the material blocking component of the present invention.

[0020] Figure 6 This is a schematic diagram of the installation structure of the folding elastic sleeve of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the air pump, suction pipe, and jet pipe of the present invention.

[0022] Reference numerals: 1-Frame, 2-Spindle, 3-Sprocket, 4-Chain, 5-Serrated support bar, 6-First electric slide rail, 7-Second electric slide rail, 8-Cylinder, 9-Mounting plate, 10-Laser cutter, 11-Shielding assembly, 111-Rectangular groove, 112-Guide post, 113-Connecting plate, 114-Rectangular frame, 115-U-shaped frame, 116-L-shaped locking block, 117-Inlet pipe, 118-Outlet pipe, 119-Solenoid valve, 1110-Folding elastic sleeve, 12-Blocking assembly, 121-Guide sleeve, 122-Sliding shaft, 123-Baffle, 124-Limit block, 125-Pressure sensor, 126-Strip plate, 13-Air pump, 14-Suction pipe, 15-Air jet pipe, 16-Filter, 17-Control panel. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0024] Example: Figures 1-6As shown, a low-loss heavy rare earth magnet thin sheet laser cutting machine includes a frame 1, a rotating shaft 2, a sprocket 3, a chain 4, a sawtooth support bar 5, a first electric slide rail 6, a second electric slide rail 7, a cylinder 8, a mounting plate 9, a laser cutter 10, a shielding component 11, and a material blocking component 12. The frame 1 is symmetrically and rotatably equipped with rotating shafts 2 on the left and right sides. Sprockets 3 are provided at both ends of the rotating shaft 2. A chain 4 is wound between two adjacent sprockets 3 on the left and right sides. Multiple sawtooth support bars 5 perpendicular to the direction of chain movement are fixedly installed at equal intervals along the circumference of the two chains 4. A predetermined distance is formed between adjacent sawtooth support bars 5 to support and position the rare earth magnet thin sheet to be processed. Multiple shallow transverse grooves are evenly opened on the top surface of the sawtooth support bar 5, and ceramic anti-slip strips are embedded in the shallow grooves.The ceramic anti-slip strip has a matte anti-slip surface to increase friction with the rare earth magnet sheets, preventing slippage and displacement during transport. The ceramic anti-slip strip is heat-resistant and does not electrochemically corrode with rare earth materials. A drive motor is installed on the frame 1 to power one of the rotating shafts 2, providing power to the entire conveying system. First electric slide rails 6 are installed at the front and rear of the top of the frame 1. Each first electric slide rail 6 has a slider that can reciprocate along its length. A second electric slide rail 7 is installed between the sliders on two first electric slide rails 6. The second electric slide rail 7 also has a slider that can reciprocate along its length. A cylinder 8 is installed on the slider of the second electric slide rail 7. The bottom of the telescopic rod of the cylinder 8... The machine is equipped with a mounting plate 9, on the bottom surface of which a laser cutting machine 10 is fixedly mounted. Its cutting head extends vertically downwards. A shielding assembly 11 is slidably mounted in the middle of the frame 1. The shielding assembly 11 includes guide posts 112, connecting plates 113, rectangular frames 114, U-shaped brackets 115, L-shaped locking blocks 116, air inlet pipes 117 and vent pipes 118, solenoid valves 119, and folding elastic sleeves 1110. Rectangular slots 111 are formed in the middle of the side walls of the two adjacent machine frames 1. Guide posts 112 are symmetrically arranged at the bottom of the rectangular slots 111 of the machine frame 1. A connecting plate 113 is slidably mounted between two adjacent guide posts 112, and a rectangular frame 114 is positioned between the two connecting plates 113. The outline of 4 is larger than the outline of the sheet to be cut, and its upper and lower edges are open structures. A horizontal groove is opened in the middle of the front and rear side walls of the rectangular frame 114. A sliding bracket 115 is installed between the two grooves. L-shaped blocks 116 are installed on both sides of the mounting plate 9. The bottom horizontal plate of the L-shaped block 116 cooperates with the sliding bracket 115. The laser cutter 10 passes through the slot of the sliding bracket 115. An air inlet pipe 117 is symmetrically connected to the right side wall of the rectangular frame 114, and an air outlet pipe 118 is connected to the middle of the left side wall of the rectangular frame 114. Solenoid valves 119 are installed on both the air inlet pipe 117 and the air outlet pipe 118. The upper part of the folding elastic sleeve 1110 is fixedly connected to the outer shell of the cylinder 8, and the lower part of the folding elastic sleeve 1110 is connected to the rectangular frame 114. 14. A top-fixed connection is provided. A baffle assembly 12 is provided on the right side of the baffle assembly 11 to baffle and limit the movement of the rare-earth magnet sheet. The baffle assembly 12 includes a guide sleeve 121, a sliding shaft 122, a baffle 123, a limiting block 124, a pressure sensor 125, and a strip plate 126. Guide sleeves 121 are symmetrically arranged front and back on the left side wall of the rectangular frame 114. A sliding shaft 122 is slidably arranged inside the guide sleeve 121. A baffle 123 is provided between the bottoms of the two sliding shafts 122. A limiting block 124 is provided at the top of the sliding shaft 122. Pressure sensors 125 are spaced apart at the lower part of the baffle 123. A strip plate 126 is slidably arranged on the lower right side of the baffle 123. The left side wall of the strip plate 126 contacts the pressure sensor 125.

[0025] like Figure 1As shown, it also includes a control panel 17. The control panel 17 is provided on the front side wall of the frame 1. The control panel 17 has a built-in controller. The controller is connected to the drive motor, the first electric slide rail 6, the second electric slide rail 7, the cylinder 8, the laser cutter 10, the solenoid valve 119 and the pressure sensor 125 through a line.

[0026] like Figure 7 As shown, it also includes an air pump 13, an air intake pipe 14, an air jet pipe 15, and a filter 16. The air pump 13 is installed on the upper part of the L-shaped block 116 on the right side. The air intake end of the air pump 13 is connected to the air intake pipe 14, and the air outlet end of the air pump 13 is connected to the air jet pipe 15. The air jet pipe 15 faces the laser cutting machine 10. The end of the air intake pipe 14 is equipped with a filter 16, which can adsorb and filter the generated smoke. The air jet pipe 15 is set as a universal adjustable bend pipe structure, and a locking knob is provided in the middle of the universal adjustable bend pipe. Loosening the locking knob can adjust the direction of the air outlet of the air jet pipe arbitrarily. The locking knob completes the angle fixation. During cutting, the cooling inert gas can be sprayed in a targeted manner at the laser cutting kerf.

[0027] When this device is needed, the drive motor is started, which drives one side of the rotating shaft 2 and sprocket 3 to rotate. Through the chain 4, the other side of the rotating shaft 2 rotates synchronously, and the serrated support bars 5, which are spaced between the two chains 4, move cyclically. The operator places the rare earth magnet sheet on the serrated support bar 5 and conveys it intermittently from right to left. The baffle 123 of the material blocking assembly 12 moves down naturally under the gravity of the limiting block 124, blocking the rare earth magnet sheet from moving forward. The edge of the rare earth magnet sheet presses against the strip plate 126, and the strip plate 126 transmits the pressure to the pressure sensor 125. The sensor sends a signal to the controller, which then instructs the drive motor to stop running, so that the rare earth magnet sheet stops at the preset cutting position.

[0028] Subsequently, the controller controls the extension of cylinder 8, which drives the mounting plate 9 and laser cutter 10 to move downwards. The L-shaped blocks 116 on both sides of the mounting plate 9 move downwards accordingly, and the L-shaped blocks 116 no longer support the frame 115. The entire rectangular frame 114 and its connected connecting plate 113 slide downwards along the guide post 112 until the rectangular frame 114 is tightly pressed against the surface of the rare earth magnet sheet. At this time, the rectangular frame 114, the folded elastic sleeve 1110 and the rare earth magnet sheet together form a sealed space. Then, the controller opens the solenoid valve 119 on the air inlet pipe 117 to fill the sealed space with inert gas through the air inlet pipe 117 to protect the cutting area. At the same time, the controller opens the solenoid valve 119 on the air outlet pipe 118 to maintain air pressure balance. When the internal air is discharged and filled with inert gas, the controller controls the solenoid valve 119 to close completely.

[0029] When the laser cutting machine 10 needs to cut the rare earth magnetic steel sheet according to the preset path, the controller starts the two first electric slide rails 6 and the second electric slide rail 7 to work together. The slider on the first electric slide rail 6 drives the second electric slide rail 7 to move left and right. The cylinder 8 on the slider of the second electric slide rail 7 drives the laser cutting machine 10 and the frame 115 to move left and right along the straight groove of the rectangular frame 114. The folding elastic sleeve 1110 deforms accordingly. When the slider of the second electric slide rail 7 moves back and forth, the slider drives the cylinder 8 to drive the laser cutting machine 10 to move back and forth along the straight hole of the frame 115. The first electric slide rail 6 and the second electric slide rail 7 working together can realize the cutting of the rare earth magnetic steel sheet according to the preset path.

[0030] During the cutting process, the air pump 13 on the right-side L-shaped clamp 116 works synchronously, drawing in the inert gas containing smoke and dust from the sealed space through the suction pipe 14. After being adsorbed and filtered by the filter 16, the gas is sprayed out from the jet pipe 15 towards the laser cutting area, achieving gas circulation purification and auxiliary cooling. After the cutting is completed, the cylinder 8 retracts, driving the laser cutting machine 10 to move upward. The L-shaped clamp 116 drives the return frame 115 to move upward, and then the rectangular frame 114 moves upward and resets. The material blocking assembly 12 moves upward through the guide sleeve 121, driving the sliding shaft 122 of the limit block 124 to move upward, thus not blocking the transmission of the rare earth magnet sheet. At the same time, the controller commands the drive motor to restart, continuing to transmit the cut rare earth magnet sheet and sending in the next rare earth magnet sheet to be processed. After the processed rare earth magnet sheet is transmitted, the cylinder 8 extends a certain distance, thus causing the baffle 123 to move downward again to block the rare earth magnet sheet to be processed.

[0031] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A low-loss heavy rare earth magnet thin sheet laser cutting machine, characterized in that it comprises: Rotating shaft (2), the frame (1) is symmetrically rotated on both sides of the rotating shaft (2); The sprocket (3) and the shaft (2) are both equipped with sprockets (3) at the front and rear ends, and a chain (4) is wound between two adjacent sprockets (3) on the left and right. A sawtooth support bar (5) is provided between two chains (4) with a sawtooth support bar (5) spaced apart. A drive motor capable of driving one of the rotating shafts (2) is provided on the frame (1). The first electric slide rail (6) is provided at the front and rear of the top of the frame (1). The second electric slide rail (7) is provided between the sliders on the two first electric slide rails (6). Cylinder (8), the slider of the second electric slide rail (7) is equipped with cylinder (8); Mounting plate (9), the bottom of the telescopic rod of cylinder (8) is provided with mounting plate (9); Laser cutting machine (10), the bottom of the mounting plate (9) is equipped with laser cutting machine (10); A shielding component (11) is slidably installed in the middle of the frame (1). The material blocking component (12) is provided on the right side of the shielding component (11) to shield and limit the rare earth magnet sheet.

2. A low-loss heavy rare earth magnet thin sheet laser cutting machine according to claim 1, characterized in that, occlusion components (11) Includes: Guide pillars (112), rectangular slots (111) are opened in the middle of the side walls of the two frames (1) that are close to each other, and guide pillars (112) are symmetrically arranged at the bottom of the rectangular slots (111) of the frame (1). A connecting plate (113) is slidably provided between two adjacent guide posts (112). A rectangular frame (114) is provided between two connecting plates (113). The circular frame (115) has a horizontal groove in the middle of the front and rear side walls of the rectangular frame (114), and the circular frame (115) is slidably arranged between the two grooves. L-shaped blocks (116) are provided on both the left and right sides of the mounting plate (9). The bottom horizontal plate of the L-shaped blocks (116) cooperates with the circular frame (115). The laser cutter (10) passes through the straight hole of the circular frame (115). The intake pipe (117) is symmetrically connected to the right side wall of the rectangular frame (114). An air outlet (118) is connected to the middle of the left side wall of the rectangular frame (114). Solenoid valves (119) are installed on the air inlet pipe (117) and the air outlet pipe (118). The upper part of the folding elastic sleeve (1110) is fixedly connected to the outer shell of the cylinder (8), and the lower part of the folding elastic sleeve (1110) is fixedly connected to the top of the rectangular frame (114).

3. A low-loss heavy rare earth magnet thin sheet laser cutting machine according to claim 2, characterized in that, The baffle assembly (12) includes: Guide sleeve (121), the left side wall of the rectangular frame (114) is symmetrically provided with guide sleeve (121) at the front and back. The sliding shaft (122) is slidably provided inside the guide sleeve (121). A baffle (123) is provided between the bottoms of the two sliding shafts (122). Limiting block (124), the top of the sliding shaft (122) is provided with limiting block (124); Pressure sensor (125), pressure sensor (125) is provided at intervals at the lower part of baffle (123); A strip plate (126) is slidably provided on the lower right side of the baffle (123), and the left side wall of the strip plate (126) is in contact with the pressure sensor (125).

4. A low-loss heavy rare earth magnet thin sheet laser cutting machine according to claim 3, characterized in that, it further... include: Control panel (17) is provided on the front side wall of the frame (1). The control panel (17) has a built-in controller. The controller is connected to the drive motor, the first electric slide rail (6), the second electric slide rail (7), the cylinder (8), the laser cutter (10), the solenoid valve (119), and the pressure sensor (125) via wiring.

5. A low-loss heavy rare earth magnet thin sheet laser cutting machine according to claim 4, characterized in that, it further... include: An air pump (13) is provided on the upper part of the L-shaped block (116) on the right side. The air intake end of the air pump (13) is connected to the air intake pipe (14). The air outlet of the air pump (13) is connected to the air pipe (15), and the air pipe (15) faces the laser cutting machine (10).

6. A low-loss heavy rare earth magnet thin sheet laser cutting machine according to claim 5, characterized in that, it further... include: A filter (16) is installed at the end of the suction pipe (14).

7. A low-loss heavy rare earth magnet thin sheet laser cutting machine according to claim 6, characterized in that, it further... include: The top surface of the serrated support strip (5) has multiple shallow horizontal grooves evenly opened, and ceramic anti-slip strips are embedded in the shallow grooves; The ceramic anti-slip strips have a matte anti-slip finish to increase friction with the thin sheet of heavy rare earth magnets.

8. A low-loss heavy rare earth magnet thin sheet laser cutting machine according to claim 7, characterized in that, it further... include: The jet pipe (15) is configured as a universal adjustable bend pipe structure, and a locking knob is provided in the middle of the universal adjustable bend pipe; Loosening the locking knob allows you to adjust the direction of the jet nozzle, while tightening the knob fixes the angle.

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