A cutting device and method for cutting a ring-shaped neodymium-iron-boron magnet

Abstract

The application discloses a kind of annular neodymium iron boron magnet cutting device, including bottom plate, the outer wall of the bottom plate is equipped with several notches;Further include: cutting mechanism, the cutting mechanism is worn in bottom plate, and cutting mechanism carries out the cutting processing of annular neodymium iron boron magnet.This improved annular neodymium iron boron magnet cutting device, neodymium iron boron magnet can be in full contact with most coolant, neodymium iron boron magnet high heat dissipation efficiency, and diamond wire is cut by the various positions of the outer wall of tubular neodymium iron boron magnet to the center position of tubular neodymium iron boron magnet simultaneously, and neodymium iron boron magnet is supported by the inside of tubular neodymium iron boron magnet, and the situation that diamond wire and neodymium iron boron magnet resistance is too large to cause part of neodymium iron boron magnet to collapse does not appear, annular neodymium iron boron magnet finished product quality is high, device structure is simple and easy to operate, and the degree of automation is high.

Description

Technical Field

[0001] This invention relates to the technical field of annular neodymium iron boron magnet cutting devices, specifically an annular neodymium iron boron magnet cutting device and its cutting method. Background Technology

[0002] Neodymium magnets, also known as neodymium iron boron magnets, are tetragonal crystals formed from neodymium, iron, and boron. The magnetic energy product of this type of magnet is greater than that of samarium cobalt magnets. Iron boron magnets are currently the second strongest permanent magnets after holmium magnets at absolute zero, and are also the most commonly used rare earth magnets. Neodymium iron boron magnets are widely used in electronic products. In the production process of ring-shaped neodymium iron boron magnets, a ring-shaped neodymium iron boron magnet cutting device is used to cut the large tubular neodymium iron boron magnets into ring-shaped neodymium iron boron magnets of appropriate thickness.

[0003] The cutting of existing ring-shaped NdFeB magnets is generally achieved through friction between diamond wire and the NdFeB magnet. During the cutting process, the diamond wire typically passes directly through the NdFeB magnet from top to bottom or left to right. When the diamond wire cuts the hollow part or bottom of the NdFeB magnet, the thinness of some areas and the strong contact force between the diamond wire and the NdFeB magnet can cause cracking in certain areas, affecting the quality of the ring-shaped NdFeB magnet. During the cutting process, a nozzle is needed to continuously spray coolant onto the NdFeB magnet to ensure that the temperature of the NdFeB magnet and diamond wire does not become too high. However, the coolant directly impacts the NdFeB magnet, causing a large amount of NdFeB magnet material to splash outwards. The coolant and NdFeB magnet do not make sufficient contact, reducing heat dissipation efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a circular neodymium iron boron magnet cutting device and cutting method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a circular neodymium iron boron magnet cutting device, comprising a base plate, wherein a plurality of notches are formed on the outer peripheral wall of the base plate;

[0006] Also includes:

[0007] A cutting mechanism is installed inside the base plate and performs cutting of annular neodymium iron boron magnets.

[0008] A collection mechanism is provided on the bottom side of the base plate, and the collection mechanism collects neodymium iron boron magnet powder. A cooling mechanism is provided between the collection mechanism and the cutting mechanism, and the cooling mechanism cools the neodymium iron boron magnet.

[0009] Preferably, the collection mechanism includes a collection box, which is fixedly sleeved to the bottom end of the base plate by bolts. A filter plate is fixedly installed inside the collection box and is located below the base plate. A circular hole is opened at the center of the base plate.

[0010] By adopting the above technical solution, the circular hole allows most of the coolant dripping from the NdFeB magnet to drip directly into the collection tank. The circular hole also provides space for the installation of the NdFeB magnet, enabling the device to accommodate the installation of NdFeB magnets of a certain length range.

[0011] Preferably, the cutting mechanism includes a fixing tube, which is inserted at the center of the circular hole, and the bottom end of the fixing tube extends to the bottom side of the collection box and is rotatably connected to the filter plate and the collection box through a bearing.

[0012] By adopting the above technical solution, the setting of the fixing tube can support and limit the neodymium iron boron magnet from inside the neodymium iron boron magnet, preventing the neodymium iron boron magnet from breaking due to the contact between the neodymium iron boron magnet and the diamond wire.

[0013] Preferably, a drive gear is fixedly mounted on the bottom side of the fixed tube, and the top side of the drive gear is in contact with the bottom side of the collection box. A main gear is meshed on the outer periphery of the drive gear, and a motor for driving the main gear is fixedly mounted on the bottom side of the collection box at the position corresponding to the main gear through a bracket.

[0014] By adopting the above technical solution, the setting of the drive gear and the main gear can increase the driving force of the motor on the fixed tube, so that the fixed tube can more easily overcome the friction between the neodymium iron boron magnet and the diamond wire, and the motor can more easily drive the neodymium iron boron magnet to rotate.

[0015] Preferably, two rectangular grooves are formed on the top side of the base plate corresponding to the position of the fixing tube. A rectangular block is inserted into the rectangular groove and the rectangular block is in contact with the inner wall of the corresponding rectangular groove. A T-shaped threaded hole is formed at the center of the top side of the rectangular block. A screw is threaded through the threaded hole. A positioning hole is formed on the side wall of the rectangular block and the interior of the positioning hole is connected to the interior of the threaded hole.

[0016] By adopting the above technical solution, the setting of rectangular grooves can constrain the position of the taut diamond wire, so that the diamond wire and the fixing tube will not collide with each other, and prevent the diamond wire from cutting the fixing tube and causing damage to the fixing tube.

[0017] Preferably, a hydraulic telescopic rod is provided between the rectangular block and the inner wall of the corresponding rectangular groove, and the output end of the hydraulic telescopic rod is fixedly connected to the corresponding rectangular block. The piston cylinder of the hydraulic telescopic rod is fixedly connected to the inner wall of the corresponding rectangular groove. Two water pumps are fixedly installed on the outer wall of the collection box, and the water inlet end of the water pump is inserted into the collection box and fixedly connected to the box wall. The water inlet end of the water pump is located below the filter plate, and the water outlet end of the water pump is inserted into the piston cylinder of the hydraulic telescopic rod and fixedly connected to the cylinder wall of the hydraulic telescopic rod piston cylinder.

[0018] By adopting the above technical solution, the water pump and hydraulic telescopic rod drive the two rectangular blocks to continuously pull the two ends of the diamond wire in opposite directions, so that there is always sufficient resistance between the diamond wire and the neodymium iron boron magnet, without the operator providing additional power or performing other operations.

[0019] Preferably, the cooling mechanism includes a partition, the top end of the fixed tube is provided with a flared opening, and the interior of the flared opening communicates with the interior of the fixed tube. The partition is fixedly installed inside the fixed tube, and the partition is located at the bottom end of the flared opening. A pressure limiting valve is fixedly installed at the center position inside the partition.

[0020] By adopting the above technical solution, the partition and pressure relief valve can constrain the pressure in the fixed tube and hydraulic rod, thereby keeping the contact force between the diamond wire and the neodymium iron boron magnet within a specific range and providing power for the push rod to squeeze the soft plate without requiring the operator to provide additional power or perform other operations.

[0021] Preferably, a connecting pipe is rotatably inserted through a bearing at the center position of the drive gear, and the two water inlet ends of the connecting pipe are respectively inserted into the piston cylinders of the two hydraulic telescopic rods and fixedly connected to the cylinder walls of the piston cylinders of the two hydraulic telescopic rods.

[0022] By adopting the above technical solution, the connection pipe allows the water pump to automatically pour excess water from the piston cylinder of the hydraulic telescopic rod into the fixed pipe after injecting a specific amount of coolant into the piston cylinder. This enables the water pump to continuously inject coolant into the piston cylinder of the hydraulic telescopic rod. After the contact point between the diamond wire and the neodymium iron boron magnet changes, the length of the hydraulic telescopic rod can be adjusted in time to straighten the diamond wire and maintain the contact force between the diamond wire and the neodymium iron boron magnet.

[0023] Preferably, the outer peripheral wall of the fixed tube has a plurality of T-shaped guide holes arranged in a circular array, and the interior of each guide hole communicates with the interior of the fixed tube. The guide holes are located below the partition plate, a soft plate is fixedly installed in the opening of the guide hole, and a push rod is slidably installed in the guide hole.

[0024] By adopting the above technical solution, the soft plate can prevent the hard push rod from colliding with the neodymium iron boron magnet, thereby avoiding damage to the inner wall of the neodymium iron boron magnet caused by the sharp edges of the push rod colliding with the neodymium iron boron magnet.

[0025] A method for cutting a ring-shaped neodymium iron boron magnet, comprising a ring-shaped neodymium iron boron magnet cutting device, specifically including the following steps:

[0026] Step 1: Install the diamond wire;

[0027] Step 2: Place the neodymium iron boron magnet in the appropriate position on the fixing tube;

[0028] Step 3: Start the water pump to fix the NdFeB magnet in place, and pull the diamond wire from both ends of the diamond wire with a certain force so that the diamond wire comes into contact with the NdFeB magnet with a certain force, while the flowing coolant adheres to the NdFeB magnet.

[0029] Step 4: Start the motor to drive the neodymium iron boron magnet to rotate at a certain speed to perform the cutting process of the neodymium iron boron magnet.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: the improved annular NdFeB magnet cutting device allows the NdFeB magnet to fully contact most of the coolant, resulting in high heat dissipation efficiency. Furthermore, the diamond wire is simultaneously cut from various positions on the outer periphery of the tubular NdFeB magnet towards its center, and is stably supported by the NdFeB magnet inside the tubular NdFeB magnet. This prevents excessive contact between the diamond wire and the NdFeB magnet, which could cause some of the NdFeB magnets to break. The resulting annular NdFeB magnet has high quality, the device has a simple structure, is easy to operate, and has a high degree of automation. The specific details are as follows:

[0031] Equipped with a collection mechanism, a cutting mechanism, and a cooling mechanism, the collection and cutting mechanisms work together to automatically separate and collect the NdFeB magnet powder from the coolant during the cutting process of the annular NdFeB magnet. This facilitates coolant reuse and limits the cutting range of the diamond wire, preventing damage to internal components during cutting. The combined action of the cutting and cooling mechanisms also enhances the fixation of the tubular NdFeB magnet, preventing friction between the magnet and diamond wire from causing the magnet to rotate and affecting the cutting operation. Furthermore, the combined collection, cutting, and cooling mechanisms continuously cool the NdFeB magnet while adjusting the tension of the diamond wire to maintain the contact force between the magnet and the NdFeB magnet, preventing changes in this contact force from affecting the cutting efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall invention;

[0033] Figure 2 This is a schematic diagram of the internal structure of the collection box of the present invention;

[0034] Figure 3 This is a schematic diagram of the overall structure of the fixing tube of the present invention;

[0035] Figure 4 This is a schematic diagram of the internal structure of the fixing tube of the present invention;

[0036] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0037] Figure 6 This is a schematic diagram of the internal structure of the threaded hole of the present invention.

[0038] In the diagram: 1. Base plate; 2. Collection mechanism; 21. Collection box; 22. Filter plate; 23. Circular hole; 24. Water pump; 3. Cutting mechanism; 31. Fixed pipe; 32. Drive gear; 33. Main gear; 34. Motor; 35. Rectangular groove; 36. Rectangular block; 37. Threaded hole; 38. Screw; 39. Positioning hole; 310. Hydraulic telescopic rod; 4. Cooling mechanism; 41. Flared end; 42. Partition plate; 43. Pressure relief valve; 44. Connecting pipe; 45. Guide hole; 46. Soft plate; 47. Push rod. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figure 1 Figure 2 , Figure 3 and Figure 6The present invention provides a technical solution: a circular neodymium iron boron magnet cutting device, including a base plate 1, with a plurality of notches on the outer peripheral wall of the base plate 1 for supplying coolant to circulate around it; and further including: a cutting mechanism 3, which is inserted into the base plate 1 and performs cutting processing on the circular neodymium iron boron magnet. The cutting mechanism 3 includes a fixed tube 31, which is made of a high-hardness metal material such as titanium alloy or nickel alloy. The fixed tube 31 is inserted into the center of the circular hole 23, and its bottom end extends to the bottom side of the collection box 21 and is rotatably connected to the filter plate 22 and the collection box 21 via bearings. Several sealing rings are installed on the outer periphery of the fixed tube 31 to seal the gaps between the fixed tube 31 and the filter plate 22 and between the fixed tube 31 and the wall of the collection box 21. A drive gear 32 is fixedly installed on the bottom side of the fixed tube 31, and the top side of the drive gear 32 contacts the bottom side of the collection box 21. A main gear 33 is meshed on the outer periphery of the drive gear 32. Without affecting the meshing transmission between the drive gear 32 and the main gear 33, the diameter of the drive gear 32 is much larger than the diameter of the main gear 33. A motor that drives the main gear 33 is fixedly installed on the bottom side of the collection box 21 at the position corresponding to the main gear 33 via a bracket. 34. Two rectangular grooves 35 are opened opposite each other on the top side of the base plate 1 at the position corresponding to the fixed pipe 31. A rectangular block 36 is inserted into the rectangular groove 35 and the rectangular block 36 is in contact with the inner wall of the corresponding rectangular groove 35. A T-shaped threaded hole 37 is opened at the center of the top side of the rectangular block 36. A screw 38 is threaded through the threaded hole 37. A positioning hole 39 is opened on the side wall of the rectangular block 36 and the interior of the positioning hole 39 is connected to the interior of the threaded hole 37. A hydraulic telescopic rod 310 is provided between the rectangular block 36 and the inner wall of the corresponding rectangular groove 35. The hydraulic telescopic rod 310 is divided into two parts: a piston cylinder and a piston rod. The piston rod is inserted into the opening of the piston cylinder. A through hole is provided at the center of the bottom of the piston cylinder to facilitate gas exchange between the inside and outside of the piston cylinder. The end of the piston rod located outside the corresponding piston cylinder is fixedly connected to the corresponding rectangular block 36. The piston cylinder of the hydraulic telescopic rod 310 is fixedly connected to the inner wall of the corresponding rectangular groove 35. The fixed tube 31 is supported and limited by the neodymium iron boron magnet inside. The drive gear 32 and the main gear 33 can increase the driving force of the motor 34 on the fixed tube 31. The rectangular grooves 35 can constrain the position of the diamond wire after it is straightened, so that the diamond wire and the fixed tube 31 will not collide with each other.

[0041] according to Figure 1 , Figure 2 and Figure 6As shown, a collection mechanism 2 is located on the bottom side of the base plate 1 and is used to collect neodymium iron boron magnet powder. The collection mechanism 2 includes a collection box 21, with several support legs fixedly installed at the four corners of the bottom side of the collection box 21. The collection box 21 is fixedly fitted to the bottom end of the base plate 1 by bolts. A filter plate 22 is fixedly installed inside the collection box 21 and is located below the base plate 1. The filter plate 22 prevents the neodymium iron boron magnet powder from falling. A circular hole 23 is opened at the center of the base plate 1. Two water pumps 24 are fixedly installed on the outer wall of the collection box 21. The water inlet end of the water pump 24 is inserted into the collection box 21 and fixedly connected to the box wall of the collection box 21. The water inlet end of the water pump 24 is located below the filter plate 22. The drain end of the water pump 24 is inserted into the piston cylinder of the hydraulic telescopic rod 310 and fixedly connected to the cylinder wall of the hydraulic telescopic rod 310. The circular hole 23 allows most of the coolant dripping from the NdFeB magnet to fall directly into the collection box 21. The circular hole 23 also provides space for the installation of the NdFeB magnet, enabling the device to accommodate NdFeB magnets of various lengths and thicknesses. The water pump 24 and the hydraulic telescopic rod 310 drive the two rectangular blocks 36 to continuously pull the two ends of the diamond wire in opposite directions, thus ensuring that there is always sufficient contact force between the diamond wire and the NdFeB magnet.

[0042] according to Figure 1-5As shown, a cooling mechanism 4 is provided between the collecting mechanism 2 and the cutting mechanism 3, and the cooling mechanism 4 performs cooling treatment on the neodymium iron boron magnets. The cooling mechanism 4 includes a partition 42, a flared end 41 at the top of the fixed tube 31, and the interior of the flared end 41 communicates with the interior of the fixed tube 31. The partition 42 is fixedly installed inside the fixed tube 31, and the partition 42 is located at the bottom end of the flared end 41. A pressure limiting valve 43 is fixedly installed at the center position inside the partition 42. A connecting pipe 44 is rotatably installed at the center position inside the drive gear 32 via a bearing. A sealing ring is installed on the outer periphery of the connecting pipe 44 to seal the gap between the connecting pipe 44 and the drive gear 32. The two water inlet ends of the connecting pipe 44 are respectively inserted into the piston cylinders of the two hydraulic telescopic rods 310 and fixedly connected to the cylinder walls of the piston cylinders of the two hydraulic telescopic rods 310. The connecting pipe 44 penetrates the bottom plate 1. The filter plate 22 and the collection box 21 are fixedly connected to the bottom plate 1, the filter plate 22 and the collection box 21. The water inlet end of the connecting pipe 44 is opposite to the drain end of the corresponding water pump 24. Several T-shaped guide holes 45 are arranged in a circular array on the outer peripheral wall of the fixed pipe 31, and the interior of each guide hole 45 is connected to the interior of the fixed pipe 31. The guide hole 45 is located below the partition plate 42. A soft plate 46 is fixedly installed in the opening of the guide hole 45. The soft plate 46 can be made of rubber or soft plastic. A push rod 47 is slidably installed in the guide hole 45. A sealing ring is installed on the outer peripheral side of the push rod 47 to seal the gap between the push rod 47 and the inner wall of the corresponding guide hole 45. The partition 42 and pressure relief valve 43 constrain the pressure in the fixed pipe 31 and the hydraulic rod, thereby keeping the contact force between the diamond wire and the neodymium iron boron magnet within a specific range and providing power for the push rod 47 to squeeze the soft plate 46. The connecting pipe 44 allows the water pump 24 to automatically pour the excess water in the piston cylinder of the hydraulic telescopic rod 310 into the fixed pipe 31 after injecting a specific amount of coolant into the piston cylinder of the hydraulic telescopic rod 310, so that the water pump 24 can continuously inject coolant into the piston cylinder of the hydraulic telescopic rod 310. The soft plate 46 prevents the harder push rod 47 from colliding with the neodymium iron boron magnet.

[0043] A method for cutting a ring-shaped neodymium iron boron magnet, comprising a ring-shaped neodymium iron boron magnet cutting device, specifically including the following steps:

[0044] Step 1: Install the diamond wire;

[0045] Step 2: Place the neodymium iron boron magnet at the appropriate position on the fixing tube 31;

[0046] Step 3: Start water pump 24 to complete the limiting and fixing of neodymium iron boron magnet, and pull diamond wire from both ends of diamond wire with a certain force so that diamond wire comes into contact with neodymium iron boron magnet with a certain force, while making the neodymium iron boron magnet adhere to flowing coolant.

[0047] Step 4: Start motor 34 to drive the neodymium iron boron magnet to rotate at a certain speed to perform the cutting process of the neodymium iron boron magnet.

[0048] Example 1: When cutting the annular neodymium iron boron magnet, first pass one end of the diamond wire through the positioning hole 39, then wrap one end of the diamond wire around the screw 38, and use a screwdriver to screw the screw 38 into the threaded hole 37. Due to the contact and clamping of the diamond wire between the screw 38 and the inner wall of the threaded hole 37, one end of the diamond wire is fixedly connected to the rectangular block 36 at that position. Then, pass the other end of the diamond wire or fold the middle part of the diamond wire through another positioning hole 39, and fix the other end or the middle part of the diamond wire to another rectangular block 36 as described above. The installation of the diamond wire is completed.

[0049] After the diamond wire is installed, the tubular neodymium iron boron magnet is placed in the appropriate position on the fixed tube 31. Then, the motor 34 drives the main gear 33 to rotate, which in turn drives the fixed tube 31 to rotate at a certain speed through the drive gear 32. Due to the friction between the fixed tube 31 and the tubular neodymium iron boron magnet, the rotating fixed tube 31 synchronously drives the tubular neodymium iron boron magnet to rotate synchronously. At this time, the rotating neodymium iron boron magnet and the diamond wire come into contact with each other, so that the neodymium iron boron magnet is cut from various positions on the outer periphery of the neodymium iron boron magnet to the middle position of the neodymium iron boron magnet at the same time.

[0050] It should be noted that by adjusting the position of the diamond wire as described above, the contact position between the diamond wire and the neodymium iron boron magnet can be adjusted, thereby avoiding waste of the diamond wire.

[0051] Example 2: As shown in Example 1, during the cutting process of neodymium iron boron magnets, the water pump 24 draws coolant from the bottom of the collection box 21 and injects it into the piston cylinder. The coolant injected into the piston cylinder pushes the piston rod into the piston cylinder. At the same time, the hydraulic telescopic rod 310 pulls the rectangular block 36 to move in the opposite direction along the rectangular groove 35, thereby straightening the diamond wire at both ends, and finally making the diamond wire and the neodymium iron boron magnet have sufficient contact force.

[0052] Coolant mixed with NdFeB magnet powder falls from the NdFeB magnet through the gap between the NdFeB magnet and the inner wall of the round hole 23 and the notch of the bottom plate 1 into the collection box 21. Due to the obstruction of the filter plate 22, the NdFeB magnet powder is intercepted above the filter plate 22, while the coolant passes through the filter plate 22 and falls into the bottom of the collection box 21 for storage.

[0053] Example 3: As shown in Examples 1 and 2, when the water pump 24 injects coolant into the piston cylinder, a portion of the coolant is simultaneously introduced into the fixed pipe 31 through the connecting pipe 44. Due to the obstruction of the partition plate 42 and the pressure limiting valve 43, the coolant entering the piston cylinder and the fixed pipe 31 will fill the interior of the piston cylinder and the fixed pipe 31 until the pressure in the fixed pipe 31 and the piston cylinder reaches the threshold. At this time, a portion of the coolant in the fixed pipe 31 flows into the guide hole 45 and pushes the soft plate 46 towards the soft plate 46, so that the soft plate 46 is tightly attached to the inner wall of the tubular NdFeB magnet, thereby greatly increasing the friction between the NdFeB magnet and the fixed pipe 31. This prevents the friction between the NdFeB magnet and the diamond wire from causing the NdFeB magnet to experience excessive resistance, causing the fixed pipe 31 and the NdFeB magnet to rotate, thus affecting the NdFeB magnet cutting process.

[0054] It should be noted that, as mentioned above, the friction between the fixed tube 31 and the neodymium iron boron magnet increases significantly due to the adhesion between the soft plate 46 and the inner wall of the neodymium iron boron magnet. At this time, the hydraulic telescopic rod 310 can pull the diamond wire with greater force, thereby increasing the contact force between the diamond wire and the neodymium iron boron magnet and accelerating the cutting rate of the neodymium iron boron magnet.

[0055] Simultaneously, due to the sufficient pressure difference across the pressure relief valve 43, the coolant subsequently injected into the fixed pipe 31 will flow from the pressure relief valve 43 into the flared end 41, filling it completely. Then, it will emerge from the open end of the flared end 41, dripping along with the neodymium iron boron magnet, passing through the round hole 23, and into the collection box 21 for separation of the coolant and neodymium iron boron magnet powder and for coolant reuse. At this time, heat exchange occurs between the coolant adhering to the surface of the neodymium iron boron magnet and the magnet itself, and the coolant in the fixed pipe 31 flows through the fixed pipe... Heat exchange occurs between the fixed tube 31 and the neodymium iron boron magnet, thereby quickly cooling the neodymium iron boron magnet. After the neodymium iron boron magnet is cut, the finished annular neodymium iron boron magnet can be directly pulled out from the fixed tube 31. The water pump 24 runs in reverse to pump part of the coolant in the piston cylinder and the fixed tube 31 into the collection box 21, thereby relieving the contact between the neodymium iron boron magnet and the soft plate 46. The position of the tubular neodymium iron boron magnet on the fixed tube 31 is adjusted, and the cutting operation of the neodymium iron boron magnet can be repeated according to the above.

[0056] It should be noted that, due to the power transmission between the main gear 33 and the drive gear 32, the rotation speed of the neodymium iron boron magnet can be reduced, so that only a small amount of coolant is thrown off the neodymium iron boron magnet when it rotates. The coolant thrown off the neodymium iron boron magnet drips onto the base plate 1, and then drips into the collection box 21 through the notch for separation of coolant and neodymium iron boron magnet powder and reuse of coolant.

[0057] It should be noted that as the water pump 24 continuously injects coolant into the piston cylinder, as the diamond wire cuts the neodymium iron boron magnet, the coolant filling the piston cylinder increases simultaneously until the pressure inside the piston cylinder reaches a threshold, which causes the diamond wire to gradually straighten, ultimately ensuring that there is always a specific strength of resistance between the diamond wire and the neodymium iron boron magnet.

[0058] It should be noted that after the diamond wire is straightened, the cutting process of the neodymium iron boron magnet is completed. At this time, the diamond wire is in contact with the outer peripheral wall of the fixed tube. There is no contact force between the diamond wire and the outer peripheral wall of the fixed tube 31, and the rotating fixed tube 31 will not be subjected to the cutting process of the diamond wire.

[0059] Working principle: According to the first, second and third examples, the neodymium iron boron magnet is cut. The bolt is unscrewed from the bottom plate 1 at regular intervals and the bottom plate 1 is taken out from the collection box 21. At this time, the relatively dry neodymium iron boron magnet powder on the filter plate 22 can be scraped off.

[0060] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0061] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A circular neodymium iron boron magnet cutting device, comprising a base plate (1), wherein a plurality of notches are provided on the outer peripheral wall of the base plate (1); Its features are, Also includes: Cutting mechanism (3), the cutting mechanism (3) is installed inside the base plate (1), and the cutting mechanism (3) performs the cutting process of the annular neodymium iron boron magnet; The collection mechanism (2) is located on the bottom side of the base plate (1) and the collection mechanism (2) collects neodymium iron boron magnet powder. A cooling mechanism (4) is provided between the collection mechanism (2) and the cutting mechanism (3) and the cooling mechanism (4) performs cooling treatment on the neodymium iron boron magnet. The collection mechanism (2) includes a collection box (21), which is fixedly sleeved on the bottom end of the base plate (1) by bolts. A filter plate (22) is fixedly installed inside the collection box (21), and the filter plate (22) is located below the base plate (1). A round hole (23) is opened at the center of the base plate (1). The cutting mechanism (3) includes a fixed tube (31), which is inserted at the center of the round hole (23), and the bottom end of the fixed tube (31) extends to the bottom side of the collection box (21) and is rotatably connected to the filter plate (22) and the collection box (21) through a bearing; A drive gear (32) is fixedly installed on the bottom side of the fixed tube (31), and the top side of the drive gear (32) is in contact with the bottom side of the collection box (21). The outer peripheral side of the drive gear (32) is meshed with a main gear (33). A motor (34) for driving the main gear (33) to rotate is fixedly installed on the bottom side of the collection box (21) at the position corresponding to the main gear (33) through a bracket. Two rectangular grooves (35) are opened opposite each other on the top side of the base plate (1) at the position corresponding to the fixed tube (31). A rectangular block (36) is inserted in the rectangular groove (35), and the rectangular block (36) is in contact with the inner wall of the corresponding rectangular groove (35). A T-shaped threaded hole (37) is opened at the center of the top side of the rectangular block (36), and a screw (38) is threaded through the threaded hole (37). A positioning hole (39) is opened on the side wall of the rectangular block (36), and the interior of the positioning hole (39) is connected to the interior of the threaded hole (37). A hydraulic telescopic rod (310) is provided between the inner wall of the rectangular block (36) and the corresponding rectangular groove (35), and the output end of the hydraulic telescopic rod (310) is fixedly connected to the corresponding rectangular block (36). The piston cylinder of the hydraulic telescopic rod (310) is fixedly connected to the inner wall of the corresponding rectangular groove (35). Two water pumps (24) are fixedly installed on the outer wall of the collection box (21), and the water inlet end of the water pump (24) is inserted into the collection box (21) and fixedly connected to the box wall of the collection box (21). The water inlet end of the water pump (24) is located below the filter plate (22). The drain end of the water pump (24) is inserted into the piston cylinder of the hydraulic telescopic rod (310) and fixedly connected to the cylinder wall of the piston cylinder of the hydraulic telescopic rod (310). The cooling mechanism (4) includes a partition (42). The top end of the fixed tube (31) is provided with a flared opening (41), and the interior of the flared opening (41) is connected to the interior of the fixed tube (31). The partition (42) is fixedly installed inside the fixed tube (31), and the partition (42) is located at the bottom end of the flared opening (41). A pressure relief valve (43) is fixedly installed at the center position inside the partition (42). A connecting pipe (44) is rotatably inserted through a bearing at the center position of the drive gear (32). The two water inlet ends of the connecting pipe (44) are respectively inserted into the piston cylinders of the two hydraulic telescopic rods (310) and fixedly connected to the cylinder walls of the piston cylinders of the two hydraulic telescopic rods (310). The outer peripheral wall of the fixed tube (31) is provided with a number of T-shaped guide holes (45) arranged in a circular array, and the interior of each guide hole (45) is connected to the interior of the fixed tube (31). The guide holes (45) are located below the partition plate (42). A soft plate (46) is fixedly installed in the opening of the guide hole (45), and a push rod (47) is slidably installed in the guide hole (45).

2. A method for cutting a circular neodymium iron boron magnet, comprising the circular neodymium iron boron magnet cutting device as described in claim 1, characterized in that, Specifically, the following steps are included: Step 1: Install the diamond wire; Step 2: Place the neodymium iron boron magnet at the appropriate position on the fixing tube (31); Step 3: Start the water pump (24) to complete the limiting and fixing of the neodymium iron boron magnet, and pull the diamond wire from both ends of the diamond wire with a certain force so that the diamond wire comes into contact with the neodymium iron boron magnet with a certain force, while the flowing coolant adheres to the neodymium iron boron magnet. Step 4: Start the motor (34) to drive the neodymium iron boron magnet to rotate at a certain speed to perform the cutting process of the neodymium iron boron magnet.

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