A laser cutting device and cutting method for double-layer magnetic sheets

Abstract

The present invention discloses a laser cutting device and a cutting method for double-layer magnetic sheets. The cutting device includes a workbench and a stock bin, a material separation partition, a material pushing assembly, a material clamping assembly and a laser source arranged on the workbench; the cutting method includes: S1: Stack a plurality of magnetic sheets to be cut in the stock bin, and preset holes in the material separation partition; S2: Use the material pushing assembly to push two magnetic sheets to be cut through the upper material separation channel and the lower material separation channel of the material separation track to the upper and lower sides of the material separation partition at the processing position respectively, and vertically clamp and fix them with the material clamping assembly; S3: Synchronously laser cut the magnetic sheets to be cut on the upper and lower sides of the material separation partition; S4: Use the material pushing assembly to push the cut magnetic sheets on the upper and lower sides of the material separation partition out of the processing position. The present invention can simultaneously cut the magnetic sheets to be cut on the upper and lower sides of the material separation partition, improve the processing efficiency, and the material clamping assembly vertically clamps the magnetic sheets to be cut, avoiding the risk of magnetic sheet fracture or middle collapse, and improving the cutting effect and quality.

Description

Technical Field

[0001] The present invention relates to the field of laser processing technology, and in particular to a laser cutting device and a cutting method for a double-layer magnetic sheet. Background Art

[0002] Neodymium iron boron (NdFeB) permanent magnets, often called the "King of Magnets," are tetragonal crystals formed by the combination of neodymium, iron, and boron. Depending on the production process, they are subdivided into three categories: sintered NdFeB, bonded NdFeB, and hot-pressed NdFeB. Sintered NdFeB, due to its inherent brittleness and the precision control limitations of traditional machining methods, is often prone to cracking and breakage during processing.

[0003] To solve this problem, laser cutting technology has been successfully applied to the processing of NdFeB magnetic materials in recent years due to its unparalleled precision manufacturing characteristics, flexible processing capabilities, excellent processing of complex shapes, high efficiency of one-time molding and high-speed operation.

[0004] Laser cutting works by focusing a high-intensity laser beam onto the material being processed, rapidly heating it to a point above its melting point. The molten metal is then blown away from the processing area using coaxial high-pressure gas or metal vapor pressure generated by the laser. As the laser beam and the material move linearly relative to each other, a series of tiny holes are formed, ultimately creating an extremely narrow cutting slit, enabling precise processing.

[0005] However, most laser cutting machine designs currently on the market are limited to single-station operation modes. Even a few dual-station designs (such as the dual-station laser cutting equipment shown in patent numbers CN110328452A and CN115283848A) are still unable to break away from the limitation of processing only a single magnetic sheet at a time. In addition, the structure of dual-station equipment is more complex, and the time for loading and unloading is increased, further affecting processing efficiency. Moreover, when processing thin magnetic sheets with a thickness of less than 0.4 mm, the traditional horizontal clamping method on both sides has a limited force area, resulting in increased horizontal pressure on the magnetic sheet during cutting. This in turn increases the risk of the magnetic sheet breaking or collapsing in the middle during cutting, affecting the cutting effect and the final product quality. Summary of the Invention

[0006] The purpose of the present invention is to provide a laser cutting device and cutting method for double-layer magnetic sheets, which can simultaneously perform laser cutting on two layers of magnetic sheets, improve cutting efficiency, and ensure product quality.

[0007] To achieve the above-mentioned object, the solution of the present invention is as follows: a laser cutting device for double-layer magnetic sheets, comprising a workbench and a material storage bin, a material dividing plate, a material pushing assembly, a material clamping assembly and a laser source arranged on the workbench;

[0008] A material separation track is provided on the workbench. A storage bin is arranged at one end of the material separation track for storing the magnetic sheets to be cut. A material separation partition is arranged at the other end of the material separation track. The material separation track has an upper material separation channel and a lower material separation channel. The upper material separation channel and the lower material separation channel extend to the other end of the material separation track and correspond to the upper and lower sides of the material separation partition respectively.

[0009] The material pushing component is slidably arranged at a position matching the material separation track and is used to push two magnetic sheets to be cut in the storage bin onto the material separation track. One magnetic sheet to be cut is pushed to the upper side of the material separation partition through the upper material separation channel, and the other magnetic sheet to be cut is pushed to the lower side of the material separation partition through the lower material separation channel.

[0010] The material clamping component is arranged at the other end of the material separation track and is used to vertically clamp the magnetic sheets to be cut on the upper and lower sides of the material separation partition. The laser source is arranged at a position matching the material separation partition. The material separation partition is provided with a hole for the laser source to pass through. The laser source is used to cut the magnetic sheets to be cut on the upper and lower sides of the material separation partition simultaneously.

[0011] In a preferred solution, the workbench includes a left material plate and a right material plate. The left material plate and the right material plate are horizontally arranged opposite to each other. The material separation tracks are respectively arranged on the opposite sides of the left material plate and the right material plate. The material pushing component is slidably arranged between the left material plate and the right material plate.

[0012] In a preferred solution, a convex strip is horizontally arranged along the length direction on the material separation tracks of the left material plate and the right material plate respectively. The convex strip extends from the middle of the material separation track to the other end of the material separation track. An upper material separation channel is formed above the convex strip, and a lower material separation channel is formed below the convex strip. The convex strip slopes downward at a position close to one end of the material separation track.

[0013] In a preferred solution, the material pushing component includes a first air cylinder, a first connecting rod, a first pushing block, a connecting plate, a second air cylinder, a second connecting rod and a second pushing block.

[0014] The output end of the first air cylinder is horizontally arranged. The first pushing block is located between the left material plate and the right material plate. The first pushing block is connected to the output end of the first air cylinder through the first connecting rod. The connecting plate is connected to the first pushing block. The second air cylinder is fixed on the connecting plate and is located below the material separation track. The output end of the second air cylinder is vertically arranged. The second pushing block is connected to the output end of the second air cylinder through the second connecting rod. The second pushing block is located between the left material plate and the right material plate.

[0015] In a preferred solution, an inclined surface is provided at one end of the first pushing block close to the first air cylinder, and a stepped surface is provided at the other end of the first pushing block far from the first air cylinder. The height of the stepped surface is equal to the sum of the heights of the two magnetic sheets to be cut. The thickness of the first pushing block at one end close to the first air cylinder is less than the thickness of the first pushing block at the other end far from the first air cylinder.

[0016] Preferably, two push plates are horizontally arranged on the second push block, and the distance between the two push plates is equal to the thickness of the material dividing partition.

[0017] In a preferred embodiment, the storage bin includes a left stopper and a right stopper, the left stopper is arranged at one end of the left material plate, and the right stopper is arranged at one end of the right material plate, the distance between the left stopper and the right stopper matches the size of the magnetic sheet to be cut, and several magnetic sheets to be cut are placed horizontally and stacked between the left stopper and the right stopper, and the two magnetic sheets to be cut at the bottom are located in the material dividing track.

[0018] In the preferred embodiment, the clamping assembly includes a third cylinder, a third connecting rod, a fixed connecting block, an upper clamp and a lower clamp; the output end of the third cylinder is horizontally arranged and perpendicular to the material distribution track, the fixed connecting block is arranged on the workbench, a makeshift groove is provided on the workbench, the upper clamp and the lower clamp are located in the makeshift groove, the middle part of the upper clamp and the lower clamp are hinged on the fixed connecting block, one end of the upper clamp and the lower clamp is connected to the output end of the third cylinder through the third connecting rod, and the other end of the upper clamp and the lower clamp is used to vertically clamp the magnetic sheets to be cut on the upper and lower sides of the material distribution partition.

[0019] Preferably, the laser source is arranged above the material dividing plate.

[0020] A laser cutting method for a double-layer magnetic sheet, using the above-mentioned laser cutting device for a double-layer magnetic sheet, the laser cutting method comprising:

[0021] S1: Stack multiple magnetic sheets to be cut on the storage bin at one end of the dividing track, and fix the dividing plate on the processing position at the other end of the dividing track. The dividing plate is preset with holes consistent with the cutting pattern;

[0022] S2: The two magnetic sheets to be cut in the storage bin are pushed onto the dividing track of the workbench at the same time by the pushing assembly. During the pushing, one of the magnetic sheets to be cut is pushed to the upper side of the dividing partition through the upper dividing channel, and the other magnetic sheet to be cut is pushed to the lower side of the dividing partition through the lower dividing channel. The magnetic sheets to be cut on the upper and lower sides of the dividing partition are vertically clamped by the clamping assembly;

[0023] S3: Set the cutting parameters of the laser source, including cutting speed, cutting frequency, duty cycle, air pressure and energy ratio, and then start the laser source. The laser source passes through the magnetic piece to be cut on the upper side of the dividing partition and then passes through the preset holes of the dividing partition to synchronously cut the magnetic piece to be cut on the lower side of the dividing partition.

[0024] S4: After the cutting is completed, the laser source is turned off, and the pushing component pushes the cut magnetic pieces on the upper and lower sides of the dividing partition out of the processing position.

[0025] After adopting the above solution, the beneficial effects of the present invention are as follows: The present invention uses a material pushing component to push two magnetic sheets to be cut to the upper and lower sides of the material separation partition at the processing position through the upper material separation channel and the lower material separation channel of the material separation track respectively. Holes for the laser source to pass through are preset on the material separation partition, enabling the laser source to cut the magnetic sheets to be cut on both the upper and lower sides of the material separation partition simultaneously, greatly improving the processing efficiency. Moreover, the clamping component vertically clamps the magnetic sheets to be cut on both the upper and lower sides of the material separation partition, increasing the stress area of the magnetic sheets to be cut, making the stress direction of the magnetic sheets to be cut vertical, avoiding the risk of magnetic sheet fracture or middle collapse during the cutting process, and effectively improving the cutting effect and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the laser cutting device in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the structure of the material pushing component in an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the structure of the clamping component in an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the material separation track arranged on the left material plate and the right material plate in an embodiment of the present invention;

[0030] Figure 5 is Figure 4 an enlarged schematic diagram of part A in;

[0031] Figure 6 is Figure 4 an enlarged schematic diagram of part B in;

[0032] Figure 7 is a schematic diagram of the structure of the storage bin arranged at the rear view of one end of the material separation track in an embodiment of the present invention;

[0033] Figure 8 is a schematic diagram of the structure of the second push block in an embodiment of the present invention;

[0034] Figure 9 is a schematic diagram of the structure of the material separation partition in an embodiment of the present invention;

[0035] Figure 10 is a schematic diagram of the first push block pushing two magnetic sheets to be cut to the upper and lower material separation channels respectively during the material separation process and the two push plates of the second push block pushing the cut magnetic sheets on both the upper and lower sides of the material separation partition out of the processing position during the material discharging process in an embodiment of the present invention after removing the right material plate and the clamping component;

[0036] Figure 11This is a schematic diagram of the embodiment of the present invention in which, after the right material plate and the clamping assembly are removed, the first push block in the pre-feeding process moves backward and the two push plates of the second push block in the pre-loading process move backward to exit the material dividing partition;

[0037] Figure 12 This is a schematic diagram of the embodiment of the present invention, after the right material plate and clamping assembly are removed, during the pre-feeding process, the inclined surface of the first push block contacts the magnetic sheet to be cut at the bottom of the storage bin, and during the pre-loading process, the second cylinder drives the two push plates on the second push block to descend;

[0038] Figure 13 This is a schematic diagram of an embodiment of the present invention in which, after the right material plate and clamping assembly are removed, the first push block moves backward to the rear of the storage bin during the pre-loading process, and the second cylinder drives the two push plates on the second push block to rise during the pre-loading process;

[0039] Figure 14 This is a schematic diagram of an embodiment of the present invention in which, after the right material plate and the clamping assembly are removed, the stepped surface of the first push block in the material removal process pushes out the two to-be-cut magnetic sheets at the bottom of the storage bin, and the two push plates of the second push block in the material loading process push the to-be-cut magnetic sheets into the upper and lower material distribution channels respectively;

[0040] Figure 15 This is a schematic diagram of an embodiment of the present invention in which, after the right material plate and the clamping assembly are removed, the step surface of the first push block in the material retrieval process pushes the two magnetic sheets to be cut at the bottom of the storage bin to the material dividing track, and the two push plates of the second push block in the loading process push the two magnetic sheets to be cut in the upper and lower material dividing channels to the upper and lower sides of the processing position material dividing partition respectively.

[0041] Description of labels:

[0042] 1. Workbench; 11. Left material plate; 12. Right material plate; 13. Gap groove; 14. Material distribution track; 15. Raised strip; 16. Upper material distribution channel; 17. Lower material distribution channel;

[0043] 2. Storage bin; 21. Left stopper; 22. Right stopper;

[0044] 3. Material separator; 31. Holes;

[0045] 4. Pushing assembly; 41. First cylinder; 42. First connecting rod; 43. First pushing block; 431. Inclined surface; 432. Step surface; 44. Connecting plate; 45. Second cylinder; 46. Second connecting rod; 47. Second pushing block; 471. Pushing plate;

[0046] 5. Clamping assembly; 51. Third cylinder; 52. Third connecting rod; 53. Fixed connecting block; 54. Upper clamping jaw; 55. Lower clamping jaw;

[0047] 6. Laser source;

[0048] 71. Magnetic sheets to be cut; 72. Magnetic sheets that have been cut. DETAILED DESCRIPTION

[0049] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0050] This embodiment provides a laser cutting device for a double-layer magnetic sheet. Figures 1 to 9 As shown, it includes a workbench 1 and a material storage bin 2, a material dividing plate 3, a material pushing assembly 4, a material clamping assembly 5 and a laser source 6 arranged on the workbench 1;

[0051] A material distribution track 14 is provided on the workbench 1. A storage bin 2 is provided at one end of the material distribution track 14 for storing the magnetic sheets 71 to be cut. A material distribution partition 3 is provided at the other end of the material distribution track 14. The material distribution track 14 is provided with an upper material distribution channel 16 and a lower material distribution channel 17. The upper material distribution channel 16 and the lower material distribution channel 17 extend to the other end of the material distribution track 14 and correspond to the upper and lower sides of the material distribution partition 3.

[0052] The pushing assembly 4 is slidably arranged at a position matching the material distribution track 14, and is used to push the two magnetic pieces 71 to be cut in the storage bin 2 onto the material distribution track 14, wherein one of the magnetic pieces 71 to be cut is pushed to the upper side of the material distribution partition 3 through the upper material distribution channel 16, and the other magnetic piece 71 to be cut is pushed to the lower side of the material distribution partition 3 through the lower material distribution channel 17;

[0053] The clamping assembly 5 is arranged at the other end of the dividing track 14, and is used to vertically clamp the magnetic sheets 71 to be cut on the upper and lower sides of the dividing partition 3. The laser source 6 is arranged at a position matching the dividing partition 3. The dividing partition 3 is preset with a hole 31 for the laser source 6 to pass through. The laser source 6 is used to simultaneously cut the magnetic sheets 71 to be cut on the upper and lower sides of the dividing partition 3.

[0054] The pushing component 4 of this embodiment pushes two magnetic sheets 71 to be cut in the storage bin 2 to the dividing track 14 at one time. Since the dividing track 14 is provided with an upper dividing channel 16 and a lower dividing channel 17, during the pushing process, one of the magnetic sheets 71 to be cut is pushed to the upper side of the dividing partition 3 through the upper dividing channel 16, and the other magnetic sheet 71 to be cut is pushed to the lower side of the dividing partition 3 through the lower dividing channel 17. The design is ingenious.

[0055] After the light beam of the laser source 6 passes through the magnetic sheet 71 to be cut on the upper side of the dividing partition 3, since the dividing partition 3 is preset with a hole 31 consistent with the cutting pattern of the laser source 6, the light beam of the laser source 6 can pass through the hole 31 to synchronously cut the magnetic sheet 71 to be cut on the lower side of the dividing partition 3. Only a set of laser cutting system and a single workstation are needed to synchronously cut two magnetic sheets 71 to be cut at one time, which effectively improves the processing efficiency and reduces the deployment cost of the equipment.

[0056] When the magnetic sheet 71 to be cut is pushed to the material separation partition 3 at the processing position, the clamping component 5 vertically clamps the magnetic sheets 71 to be cut on both the upper and lower sides of the material separation partition 3, realizing the positioning of the two magnetic sheets 71 to be cut on the material separation partition 3. The force direction of the magnetic sheet 71 to be cut is the vertical direction, avoiding the risk of magnetic sheet fracture or central collapse during the cutting process, and effectively improving the cutting effect and product quality.

[0057] As Figure 1 and Figure 5 shown, the workbench 1 includes a left material plate 11 and a right material plate 12. The left material plate 11 and the right material plate 12 are arranged horizontally opposite to each other. The material separation tracks 14 are respectively arranged on the opposite sides of the left material plate 11 and the right material plate 12. The pushing component 4 is slidably arranged between the left material plate 11 and the right material plate 12.

[0058] In this embodiment, the left material plate 11 and the right material plate 12 have the same size and are both rectangular. The material separation tracks 14 are respectively arranged on the opposite sides of the left material plate 11 and the right material plate 12, that is, the material separation tracks 14 are arranged on the long side of the left material plate 11 and the right material plate 12. The left material plate 11 and the right material plate 12 are arranged horizontally opposite to each other, and a sliding space is formed between the two opposite long sides of the left material plate 11 and the right material plate 12. The pushing component 4 is slidably arranged in the sliding space between the left material plate 11 and the right material plate 12 and is located below the left material plate 11 and the right material plate 12, making the structure of the entire workbench 1 more compact and improving the space utilization rate.

[0059] As Figure 5 shown, in this embodiment, a convex strip 15 is horizontally arranged along the length direction on the material separation tracks 14 of the left material plate 11 and the right material plate 12 respectively. The convex strip 15 extends from the middle of the material separation track 14 to the other end of the material separation track 14. An upper material separation channel 16 is formed above the convex strip 15, and a lower material separation channel 17 is formed below the convex strip 15. The heights of the upper material separation channel 16 and the lower material separation channel 17 match the thickness of the magnetic sheet 7 to be cut. The section from one end of the material separation track 14 to the middle of the material separation track 14 forms a feeding section, and the section from the middle of the material separation track 14 to the other end of the material separation track 14 forms a material separation section. The convex strip 15 slopes downward at a position close to one end of the material separation track 14, which is beneficial to guiding one of the magnetic sheets 71 to be cut located above at the feeding section into the upper material separation channel 16, while the other magnetic sheet 71 located below at the feeding section directly enters the lower material separation channel 17, ensuring that the two magnetic sheets 71 to be cut can be smoothly pushed to both the upper and lower sides of the material separation partition 3 at the processing position, with a clever design.

[0060] As Figure 1 and Figure 2 shown, the pushing component 4 includes a first air cylinder 41, a first connecting rod 42, a first pushing block 43, a connecting plate 44, a second air cylinder 45, a second connecting rod 46 and a second pushing block 47;

[0061] The output end of the first cylinder 41 is horizontally arranged. The first push block 43 is located between the left material plate 11 and the right material plate 12. The first push block 43 is connected to the output end of the first cylinder 41 through a first connecting rod 42. The connecting plate 44 is connected to the first push block 43. The second cylinder 45 is fixed on the connecting plate 44 and is located below the material distribution track 14. The output end of the second cylinder 45 is vertically arranged. The second push block 47 is connected to the output end of the second cylinder 45 through a second connecting rod 46. The second push block 47 is located between the left material plate 11 and the right material plate 12.

[0062] In this embodiment, the first cylinder 41 cooperates with the first push block 43 to push the two to-be-cut magnetic sheets 71 in the storage bin 2 into the material distribution track 14, and push the two to-be-cut magnetic sheets 71 to the upper and lower sides of the material distribution partition 3 at the processing position through the upper material distribution channel 16 and the lower material distribution channel 17. And the second cylinder 45 cooperates with the second push block 47 to push the cut magnetic sheets 72 on the upper and lower sides of the material distribution partition 3 at the processing position out of the processing position from the material distribution partition 3. Each component of the material pushing assembly 4 is tightly connected, which is beneficial to improving the space utilization rate. At the same time, the first push block 43 and the second push block 47 are respectively connected to the output ends of the first cylinder 41 and the second cylinder 45 through the first connecting rod 42 and the second connecting rod 46, ensuring the stability of the pushing. The first cylinder 41 and the second cylinder 45 can accurately control the pushing position of the to-be-cut magnetic sheet 71, meeting the requirement of accurate control of the cutting position. The first push block 43 in this embodiment is in an inverted L shape, but is not limited thereto.

[0063] As Figure 2 shown, an inclined surface 431 is provided at one end of the first push block 43 close to the first cylinder 41, and a stepped surface 432 is provided at the other end of the first push block 43 far from the first cylinder 41. The height of the stepped surface 432 is equal to the sum of the heights of the two to-be-cut magnetic sheets 71. The thickness of the first push block 43 at one end close to the first cylinder 41 is less than the thickness of the first push block 43 at the other end far from the first cylinder 41.

[0064] During feeding in this embodiment, the output end of the first cylinder 41 retracts backward. Through the first connecting rod 42 and the connecting plate 44, the first pushing block 43 and the second pushing block 47 are pulled to move backward. An inclined surface 431 is provided at one end of the first pushing block 43 close to the first cylinder 41. When the first pushing block 43 moves backward, the inclined surface 431 first contacts the to-be-cut magnetic sheet 71 at the bottom of the storage bin 2, and the to-be-cut magnetic sheet 71 at the bottom of the storage bin 2 is jacked up with continuous backward movement, thus avoiding interference with the to-be-cut magnetic sheet 71 at the bottom of the storage bin 2. The structure is simple and the design is ingenious. Therefore, the thickness of one end of the first pushing block 43 close to the first cylinder 41 is less than the thickness of the other end of the first pushing block 43 far from the first cylinder 41. And a stepped surface 432 is provided at the other end of the first pushing block 43 far from the first cylinder 41, and the height of the stepped surface 432 is equal to the sum of the heights of two to-be-cut magnetic sheets 71. When the output of the first cylinder 41 extends forward, the stepped surface 432 at the other end of the first convex block far from the first cylinder 41 can push out two to-be-cut magnetic sheets 71 in the storage bin 2 at one time, ensuring the smooth progress of the subsequent cutting process.

[0065] As Figure 2 and Figure 8 shown, two push plates 471 are horizontally arranged on the second pushing block 47, and the distance between the two push plates 471 is equal to the thickness of the material separation partition 3.

[0066] In this embodiment, two push plates 471 are horizontally arranged on the second pushing block 47. The two push plates 471 have the same size and match the size of the material separation track 14, and are both rectangular. Since the distance between the two push plates 471 is equal to the thickness of the material separation partition 3, the second pushing block 47 can accurately push the to-be-cut magnetic sheets 71 in the upper material separation channel 16 and the lower material separation channel 17 to both sides of the material separation partition 3 through the push plates 471, or accurately push out the cut magnetic sheets 72 on both sides of the material separation partition 3 from the processing position through the push plates 471, making the loading and unloading process faster and conducive to improving the cutting efficiency.

[0067] As Figure 1 and Figure 7 shown, the storage bin 2 of this embodiment includes a left stop block 21 and a right stop block 22. The left stop block 21 is arranged at one end of the left material plate 11, and the right stop block 22 is arranged at one end of the right material plate 12. The distance between the left stop block 21 and the right stop block 2 is matched with the size of the to-be-cut magnetic sheet 71. A plurality of to-be-cut magnetic sheets 71 are placed horizontally and stacked between the left stop block 21 and the right stop block 22, which can effectively position the to-be-cut magnetic sheets 71. The structure is simple and convenient for subsequent maintenance. The two to-be-cut magnetic sheets 71 at the bottom are located in the material separation track 14, which is conducive to improving the feeding efficiency.

[0068] As Figure 1 、 Figure 3 and Figure 6As shown, the material clamping assembly 5 includes a third cylinder 51, a third connecting rod 52, a fixed connection block 53, an upper clamping jaw 54 and a lower clamping jaw 55; the output end of the third cylinder 51 is horizontally arranged and perpendicular to the material distribution track 14, the fixed connection block 53 is arranged on the workbench 1, a relief groove 13 is formed on the workbench 1, the upper clamping jaw 54 and the lower clamping jaw 55 are located in the relief groove 13, the middle parts of the upper clamping jaw 54 and the lower clamping jaw 55 are hinged on the fixed connection block 53, one ends of the upper clamping jaw 54 and the lower clamping jaw 55 are connected to the output end of the third cylinder 51 through the third connecting rod 52, and the other ends of the upper clamping jaw 54 and the lower clamping jaw 55 are used for vertically clamping the magnetic sheets 71 to be cut on the upper and lower sides of the material distribution partition plate 3.

[0069] In this embodiment, driven by the third cylinder 51, the upper clamping jaw 54 and the lower clamping jaw 55 can accurately clamp the magnetic sheets 71 to be cut on the upper and lower sides of the material distribution partition plate 3, increasing the stress area of the magnetic sheets 71 to be cut, making the stress direction of the magnetic sheets 71 to be cut vertical, avoiding the risk of magnetic sheet fracture or middle collapse during the cutting process, and effectively improving the cutting effect and product quality. Specifically, as Figure 6 shown, relief grooves 13 are formed on the upper material loading plate and the upper right material loading plate, the upper clamping jaw 54 and the lower clamping jaw 55 are located in the relief grooves 13, the fixed connection block 53 is arranged at the relief grooves 13. Among them, the fixed connection block 53 is formed by protruding from the middle of a long strip plate to one side, and the protruding part is for the middle parts of the upper clamping jaw 54 and the lower clamping jaw 55 to be hinged. One ends of the upper clamping jaw 54 and the lower clamping jaw 55 are connected to the output end of the third cylinder 51 through the third connecting rod 52, and the other ends of the upper clamping jaw 54 and the lower clamping jaw 55 are used for vertically clamping the magnetic sheets 71 to be cut on the upper and lower sides of the material distribution partition plate 3. Two material clamping assemblies 5 are provided in this embodiment, but it is not limited thereto.

[0070] As Figure 1 shown, the laser source 6 of this embodiment is arranged above the material distribution partition plate 3, making the layout of the whole device more compact and improving the utilization rate of space. Of course, in other embodiments, the position of the laser source 6 can also be finely adjusted.

[0071] The working process of the laser cutting device in this embodiment is as follows:

[0072] As Figure 10 shown, at this time, the magnetic sheets 72 that have been cut are on the upper and lower sides of the material distribution partition plate 3 at the processing position. Before the cutting device operates, two magnetic sheets 71 to be cut are pre-placed in the material distribution track 14. The output end of the third cylinder 51 retracts, and drives the upper clamping jaw 54 and the lower clamping jaw 55 to open in the relief groove 13 through the third connecting rod 52.

[0073] The output end of the first cylinder 41 extends forward, and pushes the first push block 43 and the connecting plate 44 to move forward for the first time through the first connecting rod 42.

[0074] During the first forward movement, on the one hand, the first pusher block 43 pushes the two to-be-cut magnetic discs 71 pre-placed on the material distribution track 14 to the upper material distribution channel 16 and the lower material distribution channel 17 of the material distribution track 14 through the stepped surface 432, as Figure 10 shown. This is the material distribution process; on the other hand, the two push plates 471 on the second pusher block 47 enter the material distribution partition 3 and push the cut magnetic discs 72 on both the upper and lower sides of the material distribution partition 3 out of the processing position along the upper material distribution channel 16 and the lower material distribution channel 17, as Figure 10 shown. This is the material discharging process. The material distribution process and the material discharging process are carried out synchronously.

[0075] As Figures 11 to 13 shown, the output end of the first cylinder 41 retracts backward, and through the first connecting rod 42, it pulls the first pusher block 43 and the connecting plate 44 to move backward for the first time.

[0076] During the first backward movement, on the one hand, the inclined surface 431 of the first pusher block 43 first contacts the to-be-cut magnetic disc 71 at the bottom of the storage bin 2, as Figure 11 and Figure 12 shown, and as the continuous backward movement continues, it pushes up the to-be-cut magnetic disc 71 at the bottom of the storage bin 2 until the stepped surface 432 of the first pusher block 43 moves to the rear of the storage bin 2, as Figure 13 shown. This is the pre-picking process; on the other hand, the two second push plates 471 on the second pusher block 47 completely withdraw from the material distribution partition 3, as Figure 11 shown. At the same time, the second cylinder 45 drives the second pusher block 47 and the two second push plates 471 to descend through the second connecting rod 46, and the connecting plate 44 continues to move backward, as Figure 12 shown, so that the positions of the two push plates 471 match the positions of the two to-be-cut magnetic discs 71 during the previous material distribution process. At this time, the second cylinder 45 drives the second pusher block 47 and the two second push plates 471 to rise through the second connecting rod 46, as Figure 13 shown, and the two second push plates 471 are at the same horizontal position as the two to-be-cut magnetic discs 71 in the upper material distribution channel 16 and the lower material distribution channel 17. This is the pre-loading process. The pre-picking process and the pre-loading process are carried out synchronously.

[0077] As Figure 14 and Figure 15 shown, the output end of the first cylinder 41 extends forward, and through the first connecting rod 42, it pushes the first pusher block 43 and the connecting plate 44 to move forward for the second time.

[0078] During the second forward movement, on the one hand, the first pusher block 43 pushes the two to-be-cut magnetic discs 71 at the bottom of the storage bin 2 to the material distribution track 14 through the stepped surface 432, as Figure 14 and Figure 15As shown, this is the material taking process; on the other hand, the two second push plates 471 of the second push block 47 push the two magnetic pieces to be cut 71 of the upper material distribution channel 16 and the lower material distribution channel 17 along the distribution track 14 to the upper and lower sides of the processing position distribution partition 3, as shown Figure 14 and Figure 15 As shown, this is the loading process. The unloading process and the loading process are carried out simultaneously. At this time, the output end of the third cylinder 51 extends, and the upper clamping jaw 54 and the lower clamping jaw 55 in the clearance groove 13 are driven by the third connecting rod 52 to vertically clamp the magnetic pieces 71 to be cut on the upper and lower sides of the material dividing plate 3, and then laser cutting is carried out.

[0079] like Figure 10 As shown, the output end of the first cylinder 41 extends forward, pushing the first push block 43 and the connecting plate 44 forward for the third time through the first connecting rod 42.

[0080] During the third forward movement, on the one hand, the step surface 432 of the first push block 43 pushes the two magnetic pieces 71 to be cut on the material distribution track 14 into the upper material distribution channel 16 and the lower material distribution channel 17 of the material distribution track 14, as shown in FIG. Figure 10 As shown, the material separation process is continued; on the other hand, the two push plates 471 on the second push block 47 can enter the material separation partition 3 and push the cut magnetic pieces 72 on the upper and lower sides of the material separation partition 3 out of the processing position along the upper material separation channel 16 and the lower material separation channel 17, as shown Figure 10 As shown, continue the blanking process.

[0081] In this way, the six processes of material separation, material unloading, pre-material collection, pre-material loading, material collection and material loading can be reciprocated continuously to realize the automatic cutting of the double-layer magnetic sheet 71 to be cut.

[0082] This embodiment further provides a laser cutting method for a double-layer magnetic sheet, using the above-mentioned laser cutting device for a double-layer magnetic sheet. The laser cutting method includes:

[0083] S1: Stack multiple magnetic sheets 71 to be cut on the storage bin 2 at one end of the dividing track 14, and fix the dividing plate 3 on the processing position at the other end of the dividing track 14. The dividing plate 3 is pre-set with holes 31 consistent with the cutting pattern;

[0084] S2: The two magnetic sheets 71 to be cut in the storage bin 2 are simultaneously pushed onto the dividing track 14 of the workbench 1 by the pushing assembly 4. During the pushing, one of the magnetic sheets 71 to be cut is pushed to the upper side of the dividing partition 3 through the upper dividing channel 16, and the other magnetic sheet 71 to be cut is pushed to the lower side of the dividing partition 3 through the lower dividing channel 17. The clamping assembly 5 is used to vertically clamp the magnetic sheets 71 to be cut on the upper and lower sides of the dividing partition 3.

[0085] S3: Set the cutting parameters of the laser source 6, including cutting speed, cutting frequency, duty cycle, air pressure, and energy ratio. Then start the laser source 6. The laser source 6 passes through the to-be-cut magnetic discs 71 on the upper side of the material dividing partition 3 and synchronously cuts the to-be-cut magnetic discs 71 on the lower side of the material dividing partition 3 through the preset holes 31 of the material dividing partition 3.

[0086] S4: After cutting is completed, turn off the laser source 6, and the material pushing component 4 pushes out the cut magnetic discs 72 on both the upper and lower sides of the material dividing partition 3 from the processing position.

[0087] In step S1 of this embodiment, a single-wire cutting machine, a multi-wire cutting machine, or an internal circular slicing machine can be used to process the neodymium iron boron blank material into to-be-cut magnetic discs 71 with a specific thickness, and the to-be-cut magnetic discs 71 are inspected and the surface oil stains are cleaned. The specific dimensions of the to-be-cut magnetic discs 71 in this embodiment are: length 53.5 mm, width 47.3 mm, and height 0.4 mm.

[0088] In step S2 of this embodiment, an inductor can be set at the processing position to cooperate with the material racking component. Specifically, when the material pushing component 4 pushes the two to-be-cut magnetic discs 71 in the storage bin 2 to both the upper and lower sides of the material dividing partition 3 at the processing position, the inductor detects that the feeding is completed, and at this time, the clamping component 5 vertically clamps the to-be-cut magnetic discs 71 on both the upper and lower sides of the material dividing partition 3.

[0089] In step S3 of this embodiment, the required product specifications are: length 24.1 mm, width 17.8 mm, and height 0.4 mm. Set the product specification pattern, product array, set the cutting starting point, the optimal cutting path, and the cutting parameters on the control software corresponding to the laser source 6. Specifically, the cutting speed is 40 - 60 mm / s, the cutting frequency is 2 - 3 kHz, the duty cycle is 10% - 15%, the air pressure is 0.3 - 0.4 MPa, and the energy ratio is 15% - 20%. Of course, in step S1 and step S3, the preset holes 3 of the material dividing partition 3 and the parameters of the laser source 6 can be set according to the actual cutting requirements.

[0090] In step S4 of this embodiment, for the cut magnetic discs 72 that have completed processing, inspections such as dimensions and appearance can be carried out. When the inspection is unqualified, the cutting parameters are adjusted to ensure the quality of the final product.

[0091] The orientation terms mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts, and thus may change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0092] The above are only the preferred embodiments of the present invention, and do not limit the design of this case. All equivalent changes made according to the key design of this case fall within the protection scope of this case.

Claims

1. A laser cutting device for double-layer magnetic sheets, characterized in that: It includes a workbench and a material storage bin, a material dividing plate, a material pushing component, a material clamping component and a laser source arranged on the workbench; A material distribution track is provided on the workbench, a material storage bin is provided at one end of the material distribution track for storing magnetic sheets to be cut, a material distribution partition is provided at the other end of the material distribution track, and the material distribution track is provided with an upper material distribution channel and a lower material distribution channel, which extend to the other end of the material distribution track and correspond to the upper and lower sides of the material distribution partition; The pushing assembly is slidably arranged at a position matching the material distribution track, and is used to push the two magnetic sheets to be cut in the storage bin onto the material distribution track, wherein one of the magnetic sheets to be cut is pushed to the upper side of the material distribution partition through the upper material distribution channel, and the other magnetic sheet to be cut is pushed to the lower side of the material distribution partition through the lower material distribution channel; The clamping assembly is arranged at the other end of the material dividing track, and is used to vertically clamp the magnetic sheets to be cut on the upper and lower sides of the material dividing partition. The laser source is arranged at a position matching the material dividing partition. The material dividing partition is preset with a hole for the laser source to pass through. The laser source is used to simultaneously cut the magnetic sheets to be cut on the upper and lower sides of the material dividing partition. The workbench includes a left material plate and a right material plate, the left material plate and the right material plate are arranged horizontally opposite to each other, the material dividing track is respectively opened on the opposite side of the left material plate and the right material plate, and the pushing assembly is slidably arranged between the left material plate and the right material plate; The material dividing tracks of the left material plate and the right material plate are respectively provided with a convex strip horizontally along the length direction, and the convex strip extends from the middle of the material dividing track to the other end of the material dividing track. An upper material dividing channel is formed above the convex strip, and a lower material dividing channel is formed below the convex strip. The convex strip is inclined downward near one end of the material dividing track.

2. A laser cutting device for double-layer magnetic sheets according to claim 1, characterized in that: The pusher assembly includes a first cylinder, a first connecting rod, a first push block, a connecting plate, a second cylinder, a second connecting rod and a second push block; The output end of the first cylinder is horizontally arranged, the first push block is located between the left material plate and the right material plate, the first push block is connected to the output end of the first cylinder through a first connecting rod, the connecting plate is connected to the first push block, the second cylinder is fixed on the connecting plate, and is located below the material dividing track, the output end of the second cylinder is vertically arranged, the second push block is connected to the output end of the second cylinder through a second connecting rod, and the second push block is located between the left material plate and the right material plate.

3. A laser cutting device for double-layer magnetic sheets according to claim 2, characterized in that: An inclined surface is provided at one end of the first push block close to the first cylinder, and a step surface is provided at the other end of the first push block away from the first cylinder. The height of the step surface is equal to the sum of the heights of the two magnetic sheets to be cut, and the thickness of the end of the first push block close to the first cylinder is less than the thickness of the other end of the first push block away from the first cylinder.

4. A laser cutting device for double-layer magnetic sheets according to claim 2, characterized in that: Two push plates are horizontally arranged on the second push block, and the distance between the two push plates is equal to the thickness of the material dividing partition.

5. The laser cutting device for double-layer magnetic sheets according to claim 1, characterized in that: The storage bin includes a left stopper and a right stopper, the left stopper is arranged at one end of the left material plate, and the right stopper is arranged at one end of the right material plate. The distance between the left stopper and the right stopper matches the size of the magnetic sheet to be cut. Several magnetic sheets to be cut are placed horizontally and stacked between the left stopper and the right stopper, and the two magnetic sheets to be cut at the bottom are located in the material dividing track.

6. The laser cutting device for double-layer magnetic sheets according to claim 1, characterized in that: The clamping assembly includes a third cylinder, a third connecting rod, a fixed connecting block, an upper clamp and a lower clamp; the output end of the third cylinder is horizontally arranged and perpendicular to the material dividing track, the fixed connecting block is arranged on the workbench, a makeshift groove is opened on the workbench, the upper clamp and the lower clamp are located in the makeshift groove, the middle part of the upper clamp and the lower clamp are hinged on the fixed connecting block, one end of the upper clamp and the lower clamp is connected to the output end of the third cylinder through the third connecting rod, and the other end of the upper clamp and the lower clamp is used to vertically clamp the magnetic sheets to be cut on the upper and lower sides of the material dividing partition.

7. The laser cutting device for double-layer magnetic sheets according to claim 1, characterized in that: The laser source is arranged above the material dividing partition.

8. A laser cutting method for a double-layer magnetic sheet, characterized in that: The laser cutting device for a double-layer magnetic sheet according to any one of claims 1 to 7 is used, and the laser cutting method includes: S1: Stack multiple magnetic sheets to be cut on the storage bin at one end of the dividing track, and fix the dividing plate on the processing position at the other end of the dividing track. The dividing plate is preset with holes consistent with the cutting pattern; S2: The two magnetic sheets to be cut in the storage bin are pushed onto the dividing track of the workbench at the same time by the pushing assembly. During the pushing, one of the magnetic sheets to be cut is pushed to the upper side of the dividing partition through the upper dividing channel, and the other magnetic sheet to be cut is pushed to the lower side of the dividing partition through the lower dividing channel. The magnetic sheets to be cut on the upper and lower sides of the dividing partition are vertically clamped by the clamping assembly; S3: Set the cutting parameters of the laser source, including cutting speed, cutting frequency, duty cycle, air pressure and energy ratio, and then start the laser source. The laser source passes through the magnetic piece to be cut on the upper side of the dividing partition and then passes through the preset holes of the dividing partition to synchronously cut the magnetic piece to be cut on the lower side of the dividing partition. S4: After the cutting is completed, the laser source is turned off, and the pushing component pushes the cut magnetic pieces on the upper and lower sides of the dividing partition out of the processing position.

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