A neodymium iron boron magnet processing device and its usage method

Abstract

The present invention provides a NdFeB magnet processing device and a method of using the same, which are applied to the NdFeB magnet processing field. A plurality of processing cavities are distributed in an annular manner on a cylindrical grinder, and mutually cooperating grinding rollers and grinding belts are arranged in the processing cavities. A rotating shaft for pulling the plurality of grinding belts is provided in the middle of the cylindrical grinder. A pair of traction belts connected at both ends of the grinding belts are respectively wound around the front and rear ends of the rotating shaft. The length of the traction belt connected to one end of the grinding belt can be adjusted by rotating the front roller shaft, so as to facilitate the adjustment of the fit between the grinding belt and the rough blank. The device is suitable for grinding rough blanks of different diameters. During processing, it is only necessary to intermittently drive the rotating shaft in the forward and reverse directions to realize repeated traction of the grinding belt in the up and down directions. The rough blank rolls and rubs relative to each other left and right between the grinding belt and the grinding roller. There is no need to manually hold the workpiece for flipping processing, and multiple workpieces can be processed synchronously at one time, which greatly improves work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of NdFeB magnet processing, and more particularly to a NdFeB magnet processing device and a method for using the same. Background Art

[0002] As the third generation of rare earth permanent magnet materials, NdFeB magnets have a very high performance-price ratio. They are widely used in energy, transportation, machinery, medical treatment, IT, home appliances and other industries.

[0003] After sintering, NdFeB magnets become rough blanks. These blanks can be manufactured into various shapes, such as cylindrical and rectangular, depending on product requirements. After forming the rough blank, both rough grinding and fine grinding are required. Rough grinding is labor-intensive, and existing grinding machines can only grind one workpiece at a time. Manual clamping and switching between grinding surfaces are often required, resulting in low processing efficiency.

[0004] To this end, we propose a NdFeB magnet processing equipment for grinding cylindrical rough blanks and a method for using the same to effectively solve the practical problems existing in the prior art. Summary of the Invention

[0005] The purpose of this application is to solve the problem of low grinding efficiency of NdFeB magnet rough blanks by existing grinders. Compared with the existing technology, a NdFeB magnet processing equipment is provided, including a cylindrical grinder, which is provided with a plurality of processing cavities for placing rough blanks along its axial ring, a chip dropping cavity is provided at the bottom of the processing cavity, a grinding roller is rotatably installed at the chip dropping cavity, a grinding belt is provided inside the processing cavity, both ends of the grinding belt are movable through the cylindrical grinder to the inside thereof, and are connected to a traction belt, and the inner wall of the processing cavity is provided with a movable groove for the grinding belt to be movable through. A rotating shaft is rotatably installed in the middle of the inner side of the cylindrical grinder, and a motor for driving the rotating shaft is fixedly installed at the rear end of the cylindrical grinder. A pair of traction belts are respectively wound around the front and rear ends of the rotating shaft. The rotating shaft includes a front roller shaft and a rear roller shaft that are butt-jointed in front and back. Both the front roller shaft and the rear roller shaft are provided with winding ring grooves corresponding to the positions of the traction belts. A magnetic coupling shaft is fixedly connected to one end of the front roller shaft facing the rear roller shaft, and a hollow groove is provided at one end of the rear roller shaft facing the front roller shaft, and an electromagnetic sleeve matching the magnetic coupling shaft is fixedly installed in the hollow groove.

[0006] Multiple processing cavities are distributed in a ring on the cylindrical grinder, and grinding rollers and grinding belts that cooperate with each other are arranged in the processing cavities. A rotating shaft for pulling multiple groups of grinding belts is provided in the middle of the cylindrical grinder. A pair of traction belts connected at both ends of the grinding belt are respectively wound around the front and rear ends of the rotating shaft. By rotating the front roller shaft, the length of the traction belt connected to one end of the grinding belt can be adjusted, which is convenient for adjusting the fit between the grinding belt and the rough blank. It is suitable for grinding rough blanks of different diameters. During processing, it is only necessary to intermittently drive the rotating shaft in the forward and reverse directions to realize repeated traction of the grinding belt in the up and down directions. The rough blank rolls left and right between the grinding belt and the grinding roller. There is no need to manually hold the workpiece for flipping processing, and multiple workpieces can be processed simultaneously at one time.

[0007] Furthermore, the grinding belt includes an anti-wear belt body connected to a pair of traction belts, and a grinding protrusion is provided on an inner end surface of the anti-wear belt body.

[0008] Furthermore, multiple traction belts on the same plane are wound around the winding ring groove in overlapping layers, so that the same rotating shaft can synchronously drive the traction belts to rotate forward and backward.

[0009] Furthermore, rotating rods are provided at the front and rear ends of the grinding roller, and a chip-falling gap is reserved between the grinding roller and the chip-falling chamber.

[0010] Furthermore, a sealing sleeve is embedded in the outer end wall of the processing chamber and is arranged to abut against the grinding roller. A rotating groove matching the rotating rod is provided on the lower end wall of the sealing sleeve. During processing, the rough blank to be ground is placed in the processing chamber, and the grinding belt is sleeved on the upper end face of the rough blank. The bottom end face of the rough blank is in contact with the upper end face of the grinding roller. By pulling the two ends of the grinding belt up and down, the rough blank rolls and rubs between the grinding belt and the grinding roller, and the debris obtained by grinding falls into the chip dropping chamber. The setting of the sealing sleeve plays a role of limiting the processing of the rough blank on the one hand, and plays a role of dust prevention on the other hand.

[0011] Furthermore, the outer end wall of the cylindrical grinder is provided with a plurality of connecting grooves connected to the chip dropping chamber, and the outer end wall of the cylindrical grinder is installed with a dust collecting ring which abuts against the outer end of the connecting groove, and the inner end of the dust collecting ring is connected to the connecting groove one by one through a plurality of connecting pipes.

[0012] Furthermore, one end of the dust collecting ring is connected to a suction pipe, and the end of the suction pipe away from the dust collecting ring is connected to a dust collecting box. The dust collecting box is provided with a suction pump connected to the suction pipe. The addition of a dust collecting ring and a suction pipe is conducive to sucking out the debris falling into multiple chip falling cavities, making it easier to collect grinding debris.

[0013] A method for using a NdFeB magnet processing device comprises the following steps:

[0014] S1. The rough blank to be polished is placed into the processing chamber, the polishing belt is placed on the upper end surface of the rough blank, and the bottom end surface of the rough blank is in contact with the upper end surface of the polishing roller;

[0015] S2. Rotate the front roller to adjust the fit of the grinding belt to the rough blank, and then start the electromagnetic sleeve to fix the front and rear rollers;

[0016] S3. Intermittently rotate the rotating shaft in forward and reverse directions to pull the two ends of the grinding belt up and down through the forward and reverse rotation of the rotating shaft. The rough blanks roll and rub against each other between the grinding belt and the grinding roller, completing the left and right flipping and rolling grinding of multiple rough blanks simultaneously.

[0017] Optionally, an electromagnetic sheet is attached to the inner wall of the multiple processing cavities away from the grinding roller, and a flexible magnetic layer is attached to the end wall of the grinding belt facing the electromagnetic sheet.

[0018] Optionally, in S1, multiple electromagnetic sheets are started to magnetically expand the grinding belt, so that the grinding belt fits against the inner end wall of the processing chamber, and then the rough blank is pushed into the processing chamber.

[0019] Compared with the existing technology, the advantages of this application are:

[0020] (1) This solution is to distribute multiple processing chambers in a circular manner on a cylindrical grinder, and to arrange mutually cooperating grinding rollers and grinding belts in the processing chambers. A rotating shaft for pulling multiple groups of grinding belts is provided in the middle of the cylindrical grinder. A pair of traction belts connected to both ends of the grinding belts are respectively wound around the front and rear ends of the rotating shaft. By rotating the front roller shaft, the length of the traction belt connected to one end of the grinding belt can be adjusted, so as to facilitate the adjustment of the fit between the grinding belt and the rough blank. It is suitable for grinding rough blanks of different sizes. During processing, it is only necessary to intermittently drive the rotating shaft forward and reverse to realize repeated traction of the grinding belt in the up and down directions. The rough blank rolls and rubs relative to each other between the grinding belt and the grinding roller. There is no need to manually hold the workpiece for flipping processing, and multiple workpieces can be processed simultaneously at one time, which greatly improves work efficiency.

[0021] (2) Multiple traction belts on the same plane are wound around the winding ring groove in layers, so that the same rotating shaft can synchronously drive the traction belts to rotate forward and backward. When the rotating shaft rotates, it drives the front and rear traction belts to rotate forward and backward, thereby realizing the traction movement of multiple grinding belts in the forward and reverse directions. The rough blank is polished by rolling friction between the grinding belt and the grinding roller.

[0022] (3) A magnetic coupling shaft is fixedly connected to one end of the front roller shaft facing the rear roller shaft, and a hollow groove is opened at one end of the rear roller shaft facing the front roller shaft. An electromagnetic sleeve matching the magnetic coupling shaft is fixedly installed in the hollow groove. The front roller shaft is rotated to adjust the length of the traction belt connected to one end of the grinding belt. The position of the other end of the grinding belt remains unchanged, so that it is convenient to adjust the fit between the grinding belt and the rough blank. After the adjustment is completed, the electromagnetic sleeve is started to fix the front roller shaft and the rear roller shaft. It is suitable for grinding rough blanks of different sizes and expands the scope of application.

[0023] (4) A chip-falling gap is reserved between the grinding roller and the chip-falling chamber, and a plurality of connecting grooves connected to the chip-falling chamber are opened on the outer end wall of the cylindrical grinder. A dust collecting ring is installed on the outer end wall of the cylindrical grinder, which is against the outer end of the connecting groove. The inner end of the dust collecting ring is connected to the connecting grooves one by one through multiple channels. The chips obtained by grinding fall into the chip-falling chamber. The addition of dust collecting rings and suction pipes is conducive to sucking out the chips that fall into the multiple chip-falling chambers, making it easier to collect the grinding chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A partial internal perspective view of this application;

[0025] Figure 2 A cross-sectional view of the cylindrical grinder of the present application;

[0026] Figure 3 This is a schematic diagram of the structure of the joint between the rotating shaft and multiple sets of grinding belts of the present application;

[0027] Figure 4 This is a schematic diagram of the splitting of the rotation axis of this application;

[0028] Figure 5 This is an internal schematic diagram of a single set of grinding belts in the present application cooperating with a rotating shaft to process a rough blank;

[0029] Figure 6 This is a schematic diagram of the structure of the cylindrical grinder and the sealing sleeve combined with the present application Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the structure of the cylindrical grinder and the sealing sleeve combined with the present application Figure 2 ;

[0031] Figure 8 This is a schematic diagram of the disassembly of the connection between the cylindrical grinder and the dust collecting ring of the present application;

[0032] Figure 9 This is a schematic diagram of the structure after an electromagnetic plate is added to the cylindrical grinder in Example 2 of the present application;

[0033] Figure 10 This is a schematic diagram of the working state of the electromagnetic sheet in Example 2 of the present application.

[0034] Description of the numbers in the figure:

[0035] 1 cylindrical grinder, 101 machining chamber, 102 chip falling chamber, 103 connecting groove, 2 rough blank, 3 rotating shaft, 31 front roller shaft, 311 magnetic connection shaft, 32 rear roller shaft, 321 electromagnetic sleeve, 4 grinding roller, 5 grinding belt, 6 traction belt, 7 sealing sleeve, 8 dust collecting ring, 81 connecting pipe, 9 suction pipe, 10 electromagnetic sheet. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work based on the embodiments in the present application are within the scope of protection of this application.

[0037] Example 1:

[0038] This application discloses a NdFeB magnet processing equipment, please refer to Figure 1-5 , comprising a cylindrical grinder 1, the cylindrical grinder 1 is provided with a plurality of processing chambers 101 for placing rough blanks 2 in an annular manner along its axial direction, a chip-dropping chamber 102 is provided at the bottom of the processing chamber 101, a grinding roller 4 is rotatably installed in the chip-dropping chamber 102, a grinding belt 5 is provided inside the processing chamber 101, the grinding belt 5 includes an anti-wear belt body connected to a pair of traction belts 6, and a grinding protrusion is provided on the inner end surface of the anti-wear belt body;

[0039] Both ends of the grinding belt 5 are movable through the cylindrical grinder 1 to its inner side and are connected to a traction belt 6. An movable groove for the grinding belt 5 to pass through is opened on the inner wall of the processing chamber 101. A rotating shaft 3 is rotatably installed in the middle part of the inner side of the cylindrical grinder 1. A motor that drives the rotating shaft 3 is fixedly installed at the rear end of the cylindrical grinder 1. A pair of traction belts 6 connected to both ends of the grinding belt 5 are respectively wound around the front and rear ends of the rotating shaft 3. The rotating shaft 3 includes a front roller shaft 31 and a rear roller shaft 32 that are connected front and back. The front roller shaft 31 and the rear roller shaft 32 are both provided with a winding ring groove corresponding to the position of the traction belt 6. Multiple traction belts 6 on the same plane are overlapped and wound around the winding ring groove. When the rotating shaft 3 rotates, the front and rear two groups of traction belts 6 are driven to rotate forward and backward, thereby realizing the traction movement of multiple grinding belts 5 in forward and reverse directions. The rough blank 2 is polished by rolling friction between the grinding belt 5 and the grinding roller 4.

[0040] See also Figure 3-5 The end of the front roller shaft 31 facing the rear roller shaft 32 is fixedly connected to the magnetic connection shaft 311, and the end of the rear roller shaft 32 facing the front roller shaft 31 is provided with a hollow groove, and an electromagnetic sleeve 321 matching the magnetic connection shaft 311 is fixedly installed in the hollow groove. The front roller shaft 31 is rotated to adjust the length of the traction belt 6 connected to one end of the grinding belt 5, and the position of the other end of the grinding belt 5 remains unchanged, so as to facilitate the adjustment of the fit between the grinding belt 5 and the rough blank 2. After the adjustment is completed, the electromagnetic sleeve 321 is started to fix the front roller shaft 31 and the rear roller shaft 32, which is suitable for grinding rough blanks 2 of different diameters, thereby expanding the scope of application.

[0041] See also Figure 6-8, the front and rear ends of the grinding roller 4 are both provided with a rotating rod, and a chip-falling gap is reserved between the grinding roller 4 and the chip-falling chamber 102. The outer end wall of the processing chamber 101 is embedded with a sealing sleeve 7 that is set against the grinding roller 4. The lower end wall of the sealing sleeve 7 is provided with a rotating groove that matches the rotating rod. The rear end of the processing chamber 101 is also provided with another rotating groove that matches the rotating rod to realize the rotation installation of the grinding roller 4. During processing, the technician uses an external tool to pick up the grinding belt 5 and then put it into the rough blank 2. The rough blank 2 to be ground is loaded into the processing chamber. In the cavity 101, the grinding belt 5 is sleeved on the upper end surface of the rough blank 2, and the bottom end surface of the rough blank 2 is in contact with the upper end surface of the grinding roller 4. By pulling the two ends of the grinding belt 5 up and down, the traction distance is set according to the implementation needs, so that the entire end surface of the rough blank 2 can be evenly rubbed relative to each other. The rough blank 2 rolls and rubs between the grinding belt 5 and the grinding roller 4, and the debris obtained by grinding falls into the chip falling cavity 102. The setting of the sealing sleeve 7 plays a processing limit role for the rough blank 2 on the one hand, and plays a dust-proof role on the other hand.

[0042] In addition, a plurality of connecting grooves 103 connected to the chip falling chamber 102 are provided on the outer end wall of the cylindrical grinder 1. A dust collecting ring 8 is installed on the outer end wall of the cylindrical grinder 1, which is against the outer end of the connecting groove 103. The inner end of the dust collecting ring 8 is connected to the connecting groove 103 one by one through a plurality of connecting pipes 81. One end of the dust collecting ring 8 is connected to a suction pipe 9, and the end of the suction pipe 9 away from the dust collecting ring 8 is connected to a dust collecting box. A suction pump connected to the suction pipe 9 is provided in the dust collecting box. The addition of the dust collecting ring 8 and the suction pipe 9 is conducive to sucking out the debris falling inside the multiple chip falling chambers 102, facilitating the collection of grinding debris, and further playing a dust suppression role.

[0043] A method for using a NdFeB magnet processing device comprises the following steps:

[0044] S1. Place the rough blank 2 to be polished into the processing chamber 101. The polishing belt 5 is sleeved on the upper end surface of the rough blank 2. The bottom end surface of the rough blank 2 is in contact with the upper end surface of the polishing roller 4.

[0045] S2, rotate the front roller 31 to adjust the fit of the grinding belt 5 to the rough blank 2, and then start the electromagnetic sleeve 321 to fix the front roller 31 and the rear roller 32;

[0046] S3. Intermittently rotate the rotating shaft 3 in forward and reverse directions. The two ends of the grinding belt 5 are pulled up and down by the forward and reverse rotation of the rotating shaft 3. The rough blanks 2 are subjected to relative rolling friction between the grinding belt 5 and the grinding roller 4, completing the synchronous left-right turning and rolling rough grinding of multiple rough blanks 2.

[0047] Example 2:

[0048] The difference between this embodiment and the first embodiment is that: on the basis of the first embodiment, the present embodiment further includes an electromagnetic sheet 10 and a flexible magnetic layer on the end wall of the grinding belt 5 facing the electromagnetic sheet 10. The rest of the structure is consistent with the first embodiment, as follows:

[0049] Optionally, an electromagnetic sheet 10 is attached to the inner wall of the end of the multiple processing cavities 101 away from the grinding roller 4, and a flexible magnetic layer is attached to the end wall of the grinding belt 5 facing the electromagnetic sheet 10. In S1, the multiple electromagnetic sheets 10 are started, and the electromagnetic sheet 10 magnetically expands the grinding belt 5. The grinding belt 5 fits the inner end wall of the processing cavity 101, and then the rough blank 2 is pushed into the processing cavity 101, which is conducive to expanding and limiting the grinding belt 5, and is conducive to the technician to smoothly push the rough blank 2 between the grinding belt 5 and the grinding roller 4. There is no need to use external tools to pick up the grinding belt 5 and then put it into the rough blank 2, which simplifies the workpiece placement process. After the rough blank 2 is placed, the electromagnetic sheet 10 is disconnected, and the fit between the grinding belt 5 and the rough blank is adjusted by rotating the front roller shaft 31.

[0050] The above is only a preferred specific implementation method of the present application; however, the protection scope of the present application is not limited thereto; any technician familiar with the technical field within the technical scope disclosed in the present application, who makes equivalent replacements or changes based on the technical solution and improved ideas of the present application, shall be covered within the protection scope of the present application.

Claims

1. A NdFeB magnet processing device, comprising a cylindrical grinder (1), characterized in that: The cylindrical grinder (1) is provided with a plurality of processing chambers (101) for placing rough blanks (2) in an annular manner along its axial direction, a chip dropping chamber (102) is provided at the bottom of the processing chamber (101), a grinding roller (4) is rotatably installed at the chip dropping chamber (102), a grinding belt (5) is provided inside the processing chamber (101), both ends of the grinding belt (5) are movably passed through the cylindrical grinder (1) to the inside thereof, and are connected to a traction belt (6), an active groove for the grinding belt (5) to movably pass through the inner wall of the processing chamber (101), a rotating shaft (3) is rotatably installed at the middle of the inner side of the cylindrical grinder (1), and the rear end of the cylindrical grinder (1) is fixed. A motor for driving the rotating shaft (3) is fixedly installed, and a pair of traction belts (6) are respectively wound on the front and rear ends of the rotating shaft (3); the rotating shaft (3) includes a front roller shaft (31) and a rear roller shaft (32) that are arranged in a front-to-back manner; the front roller shaft (31) and the rear roller shaft (32) are both provided with a winding ring groove corresponding to the position of the traction belt (6); one end of the front roller shaft (31) facing the rear roller shaft (32) is fixedly connected to a magnetic connection shaft (311); one end of the rear roller shaft (32) facing the front roller shaft (31) is provided with a hollow groove, and an electromagnetic sleeve (321) matching the magnetic connection shaft (311) is fixedly installed in the hollow groove; The grinding belt (5) comprises an anti-wear belt body connected to a pair of traction belts (6), the inner end surface of the anti-wear belt body is provided with a grinding protrusion, and a plurality of traction belts (6) on the same plane are overlapped and wound on the winding ring groove.

2. The NdFeB magnet processing equipment according to claim 1, characterized in that: The grinding roller (4) is provided with a rotating rod at both the front and rear ends, and a chip-falling gap is reserved between the grinding roller (4) and the chip-falling chamber (102).

3. The NdFeB magnet processing equipment according to claim 2, characterized in that: A sealing sleeve (7) is embedded in the outer end wall of the processing chamber (101) and is arranged to abut against the grinding roller (4). A rotating groove matching the rotating rod is provided on the lower end wall of the sealing sleeve (7).

4. The NdFeB magnet processing equipment according to claim 3, characterized in that: The outer end wall of the cylindrical grinder (1) is provided with a plurality of communicating grooves (103) connected to the chip dropping chamber (102); the outer end wall of the cylindrical grinder (1) is provided with a dust collecting ring (8) abutting against the outer end of the communicating groove (103); the inner end of the dust collecting ring (8) is connected one by one to the communicating groove (103) via a plurality of connecting pipes (81).

5. The NdFeB magnet processing equipment according to claim 4, characterized in that: One end of the dust collecting ring (8) is connected to a suction pipe (9), and the end of the suction pipe (9) away from the dust collecting ring (8) is connected to a dust collecting box, and a suction pump connected to the suction pipe (9) is provided in the dust collecting box.

6. The method for using the NdFeB magnet processing equipment according to claim 1, wherein: The following steps are involved: S1. The rough blank (2) to be polished is placed into the processing chamber (101), the polishing belt (5) is sleeved on the upper end surface of the rough blank (2), and the bottom end surface of the rough blank (2) is in contact with the upper end surface of the polishing roller (4); S2, rotating the front roller shaft (31), adjusting the fit of the grinding belt (5) to the rough blank (2), and then starting the electromagnetic sleeve (321) to fix the front roller shaft (31) and the rear roller shaft (32); S3, intermittently rotating the rotating shaft (3) in forward and reverse directions, pulling the two ends of the grinding belt (5) up and down through the forward and reverse rotation of the rotating shaft (3), and the rough blanks (2) are subjected to relative rolling friction between the grinding belt (5) and the grinding roller (4), thereby completing the left-right flipping rolling grinding of multiple rough blanks (2) simultaneously.

7. The method for using the NdFeB magnet processing equipment according to claim 6, wherein: An electromagnetic sheet (10) is attached to the inner wall of the multiple processing chambers (101) at one end away from the grinding roller (4), and a flexible magnetic layer is attached to the end wall of the grinding belt (5) facing the electromagnetic sheet (10).

8. The method for using the NdFeB magnet processing equipment according to claim 7, wherein: In the S1, a plurality of electromagnetic sheets (10) are activated, the electromagnetic sheets (10) magnetically expand the grinding belt (5), the grinding belt (5) is fitted with the inner end wall of the processing chamber (101), and then the rough blank (2) is pushed into the processing chamber (101).

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