CN115372869A

CN115372869A - Neodymium iron boron permanent magnet polarity check out test set

Info

Publication number: CN115372869A
Application number: CN202210859064.1A
Authority: CN
Inventors: 陈翔; 许梦学; 何厚生
Original assignee: Anhui Hanhai New Material Co ltd
Current assignee: Anhui Hanhai New Material Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-11-22

Abstract

The invention discloses polarity detection equipment for a neodymium iron boron permanent magnet, and belongs to the field of polarity detection devices. The polarity detection equipment for the neodymium iron boron permanent magnet comprises a workbench, wherein an installation part is arranged above the workbench, an adjusting component for driving the installation part to move is arranged on the surface of the workbench, a clamping component for fixing a workpiece is arranged on the installation part, a limiting component for supporting and limiting the workpiece is driven on the clamping component, a side plate is fixed on the surface of one side of the workbench, and a polarity detection instrument is fixedly arranged on the surface of the side plate; the workpiece to be detected is automatically conveyed to the lower part of the detection area through the conveying assembly, the clamping assembly and the limiting assembly are matched with each other, the workpiece to be detected is conveniently clamped, fixed and limited, the workpiece is moved upwards to the detection area through the adjusting assembly, and the workpiece to be detected is automatically mechanically operated and is convenient to use.

Description

Neodymium iron boron permanent magnet polarity check out test set

Technical Field

The invention relates to the technical field of polarity detection devices, in particular to polarity detection equipment for a neodymium iron boron permanent magnet.

Background

The Nd-Fe-B permanent magnetic material is a permanent magnetic material based on an intermetallic compound Nd2Fe 14B. Compared with cast Al-Ni-Co permanent magnetic materials and ferrite permanent magnetic materials, the neodymium iron boron has extremely high magnetic energy and coercive force, and can absorb a heavy object which is 640 times of the self weight. High energy density's advantage makes neodymium iron boron permanent magnet material obtain the wide application in modern industry and electron technology, permanent magnet material needs make it have magnetism through saturation magnetization before the use, its polarity of magnet after magnetizing meets the requirements and will pass through the check-out test set inspection, but in the device that detects permanent magnetism work piece among the prior art, the work piece of taking of the manual work of mostly adopting during the use detects check-out test set, artifical intensity of labour is big, it drops easily to hold fixed for a long time, stability is relatively poor, it is very inconvenient to operate, and work efficiency is poor when the device uses, increase in production cost, therefore we provide a neodymium iron boron permanent magnet polarity check-out test set.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, workpieces are mostly manually taken to detect detection equipment, the labor intensity of workers is high, the workpieces are easily dropped off after being held and fixed for a long time, the stability is poor, the operation is inconvenient, the working efficiency is poor when the device is used, and the production cost is increased, and provides the neodymium iron boron permanent magnet polarity detection equipment.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a neodymium iron boron permanent magnet polarity check out test set, includes the workstation, the top of workstation is provided with the installed part, the surface of workstation is provided with the adjusting part that is used for driving the installed part and removes, be provided with on the installed part and be used for the centre gripping subassembly fixed to the work piece, the transmission has the spacing subassembly that supports spacingly to the work piece on the centre gripping subassembly, one side fixed surface of workstation has the curb plate, the fixed surface of curb plate is installed with polarity detecting instrument, be provided with the transmission assembly who is used for driving the work piece and carries on the workstation, one side below that lies in the transmission assembly on the workstation is provided with places the box.

Preferably, the adjusting part is including fixing the fixed plate on the workstation surface, the fixed surface of fixed plate has first electric putter, first electric putter's output is fixed with the connecting block, the spout has been seted up on the top surface of workstation, the inside slip of spout has the slider, the tip and the connecting block fixed connection of slider, second electric putter is installed at the top of connecting block, second electric putter's top links to each other with the installed part is fixed.

Preferably, the centre gripping subassembly is including fixing the first motor on the installed part surface, the output of first motor runs through the installed part and is fixed with first rotation axis, the fixed surface of first rotation axis has first tooth connecting rod, the one end of first tooth connecting rod has first clamping bar through the round pin axle rotation, the surface of first clamping bar rotates the gag lever post through the round pin axle, the one end of gag lever post rotates the connection on the surface of installed part through the round pin axle.

Preferably, the surface meshing of first tooth connecting rod has the second tooth connecting rod, the axle center department of second tooth connecting rod one end is fixed with the second axis of rotation, the tip of second axis of rotation passes through the bearing and is connected with the installed part rotation, the other end of second tooth connecting rod rotates through the round pin axle has the second clamping bar, the surface of second clamping bar rotates through the round pin axle has the connecting rod, the tip of connecting rod rotates through the round pin axle and connects on the surface of installed part, the second clamping bar all is fixed with anti-skidding rubber block with the surface of first clamping bar.

Preferably, spacing subassembly is including fixing the action wheel on first rotation axis surface, there is from the driving wheel on the surface of action wheel through belt drive, axle center department from the driving wheel is fixed with the dwang, the dwang tip runs through the installed part and passes through the bearing and rotate the bottom inner wall of connection at the installed part, the surface of dwang is provided with the worm, the surface meshing of worm has the turbine, the axle center department of turbine is fixed with the lead screw, the surface of lead screw passes through the bearing and is connected with the installed part rotation.

Preferably, one end of the screw rod is in threaded connection with a threaded sleeve, a supporting plate is fixed to the end portion of the threaded sleeve, a baffle is fixed to the surface of the top of the supporting plate, telescopic rods are fixed to the two sides, located on the surface of the supporting plate, of the threaded sleeve, and the end portion of each telescopic rod is fixedly connected with the corresponding mounting piece.

Preferably, the transmission assembly is including fixing the second motor at workstation side surface, the output of second motor runs through the workstation and is fixed with first transmission shaft, the tip of first transmission shaft passes through the bearing and is connected with the workstation rotation, the fixed surface of first transmission shaft has first transmission roller, the surface transmission of first transmission roller has the conveyer belt, the surface transmission of conveyer belt has second transmission roller, the axle center department of second transmission roller is fixed with the second transmission shaft, the tip of second transmission shaft passes through the bearing and is connected with the workstation rotation, the fixed surface of conveyer belt has the separation shelves strip.

Preferably, a protection plate is fixed to the top surface of the placing box.

Preferably, the top of the workbench is fixed with a limiting block, the surface of one side of the limiting block is fixed with an air cylinder, and the end of the air cylinder is fixed with a pushing plate.

Preferably, a box door is rotatably connected to the surface of one side of the workbench through a hinge, and a handle is mounted on the surface of the box door.

Compared with the prior art, the invention provides a neodymium iron boron permanent magnet polarity detection device, which has the following beneficial effects:

1. this neodymium iron boron permanent magnet polarity check out test set conveniently drives the installed part through the adjusting part that sets up on the workstation and adjusts to suitable position, and the work piece that waits to detect that the convenience was come through the centre gripping subassembly on the installed part and then the conveying is come carries out the centre gripping fixed to what make things convenient for equipment better detects the work piece.

2. This neodymium iron boron permanent magnet polarity check out test set through the operation of the centre gripping subassembly on the installed part, drives spacing subassembly interlock to make spacing subassembly support the work piece bottom of centre gripping spacingly, improve the stability of centre gripping, prevent that the work piece from producing the displacement, the work piece after the centre gripping of being convenient for shifts up through adjusting the subassembly, and the utilization should carry out polarity detection by polarity detecting instrument.

3. This neodymium iron boron permanent magnet polarity check out test set conveniently will wait to detect through the transmission assembly who sets up on the workstation neodymium iron boron permanent magnet material and place and go on transmission assembly, transport the transmission automatically to waiting to detect the region, make things convenient for equipment to carry out detection operation, automation mechanized operation, convenient to use effectively improves its work efficiency.

The device has the advantages that the structure is simple, workpieces to be detected are automatically conveyed to the lower side of the detection area through the transmission assembly, the workpieces to be detected are conveniently clamped, fixed and limited through the mutual matching of the clamping assembly and the limiting assembly, the workpieces are moved up to the detection area through the adjusting assembly, the mechanical operation is automated, and the use is convenient.

Drawings

FIG. 1 is a schematic structural diagram of a neodymium-iron-boron permanent magnet polarity detection device according to the present invention;

FIG. 2 is a side sectional view of an apparatus for detecting polarity of NdFeB permanent magnet according to the present invention;

FIG. 3 is an enlarged view of area A of FIG. 2 according to the present invention;

FIG. 4 is a partial structural view of a clamping assembly according to the present invention;

FIG. 5 is a schematic view of a partial structure of a position limiting assembly according to the present invention;

fig. 6 is a top view of a polarity detection device according to the present invention;

fig. 7 is another sectional side view of the polarity sensing apparatus according to the present invention.

In the figure: 1. a work table; 2. a mounting member; 3. an adjustment assembly; 301. a fixing plate; 302. a first electric push rod; 303. connecting blocks; 304. a chute; 305. a slider; 306. a second electric push rod; 4. a clamping assembly; 401. a first motor; 402. a first rotating shaft; 403. a first tooth link; 404. a first clamping bar; 405. a limiting rod; 406. a second toothed connecting rod; 407. a second rotating shaft; 408. a second clamping bar; 409. a connecting rod; 5. a limiting component; 501. a driving wheel; 502. a driven wheel; 503. rotating the rod; 504. a worm; 505. a turbine; 506. a screw rod; 507. a threaded sleeve; 508. a support plate; 509. a baffle plate; 510. a telescopic rod; 6. a side plate; 7. a polarity detection instrument; 8. a transmission assembly; 801. a second motor; 802. a first transmission shaft; 803. a first drive roller; 804. a conveyor belt; 805. a second driving roller; 806. a second transmission shaft; 807. separating the barrier strips; 9. placing a box; 10. a protection plate; 11. a limiting block; 12. a cylinder; 13. a push plate; 14. and a box door.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1:

referring to fig. 1-7, a neodymium iron boron permanent magnet polarity detection device comprises a workbench 1, an installation part 2 is arranged above the workbench 1, an adjusting component 3 used for driving the installation part 2 to move is arranged on the surface of the workbench 1, a clamping component 4 used for fixing a workpiece is arranged on the installation part 2, a limiting component 5 used for limiting the support of the workpiece is arranged on the clamping component 4 in a transmission mode, a side plate 6 is fixed on the surface of one side of the workbench 1, a polarity detection instrument 7 is installed on the surface of the side plate 6, a transmission component 8 used for driving the workpiece to convey is arranged on the workbench 1, and a placement box 9 is arranged below one side of the transmission component 8 on the workbench 1.

In the invention, when the neodymium iron boron permanent magnet material detection device is used, neodymium iron boron permanent magnet material to be detected is automatically transmitted and conveyed to a detection area below a polarity detection instrument 7 through a transmission assembly 8, further, the trouble of manual taking, carrying and detection of workers is eliminated, the mechanical operation is realized, the use is convenient, when the neodymium iron boron permanent magnet material is conveyed to the position below the polarity detection instrument 7, the position of an installation part 2 is conveniently adjusted through an adjusting assembly 3 on a workbench 1, a clamping assembly 4 on the installation part 2 is further used for clamping and fixing a placed workpiece, the workpiece is conveniently taken up and is close to the polarity detection instrument 7 on a side plate 6, so that polarity detection is carried out, a limiting assembly 5 is driven to link through a limiting assembly 5 arranged on the installation part 2, the workpiece is supported and limited at the bottom of the workpiece by the limiting assembly 5 in the clamping process, a good stabilizing effect is achieved, the falling and displacement during detection is prevented, when the workpiece is detected to be unqualified, the unqualified product is intensively recovered and stored through a placing box 9, the classification is convenient, and the working efficiency of the workers is effectively improved.

Example 2:

Adjusting part 3 is including fixing fixed plate 301 on 1 surperficial of workstation, the fixed surface of fixed plate 301 has first electric putter 302, the output of first electric putter 302 is fixed with connecting block 303, spout 304 has been seted up on the top surface of workstation 1, the inside slip of spout 304 has slider 305, the tip and the connecting block 303 fixed connection of slider 305, second electric putter 306 is installed at the top of connecting block 303, the top and the installed part 2 of second electric putter 306 are fixed continuously.

In the invention, the first electric push rod 302 is started to drive the connecting block 303 to move, the second electric push rod 306 is driven to move through the connecting block 303, the left and right positions of the mounting part 2 are adjusted, the clamping component 4 and the limiting component 5 are convenient to be in clamping contact with a workpiece during conveying better, the sliding block 305 slides in the sliding groove 304, the movement limiting effect on the connecting block 303 is convenient, the second electric push rod 306 is started to drive the mounting part 2 to move up and down, the clamped workpiece is convenient to be lifted to the lower part of the polarity detection instrument 7, the polarity detection is carried out on the workpiece by using the detection probe on the polarity detection instrument 7, the trouble of manual taking is saved, and the labor intensity is saved.

Example 3:

referring to fig. 1-7, a neodymium iron boron permanent magnet polarity check out test set, including workstation 1, workstation 1's top is provided with installed part 2, workstation 1's surface is provided with the adjusting part 3 that is used for driving installed part 2 to remove, be provided with on the installed part 2 and be used for the centre gripping subassembly 4 fixed to the work piece, the transmission has the spacing subassembly 5 that supports the work piece spacing on the centre gripping subassembly 4, workstation 1's one side fixed surface has curb plate 6, the fixed surface of curb plate 6 is provided with polarity detection instrument 7, be provided with the transmission assembly 8 that is used for driving the work piece and carries on the workstation 1, it is provided with and places box 9 to lie in one side below of transmission assembly 8 on the workstation 1.

The clamping assembly 4 comprises a first motor 401 fixed on the surface of the mounting part 2, the output end of the first motor 401 penetrates through the mounting part 2 and is fixed with a first rotating shaft 402, the surface of the first rotating shaft 402 is fixed with a first tooth connecting rod 403, one end of the first tooth connecting rod 403 rotates with a first clamping rod 404 through a pin shaft, the surface of the first clamping rod 404 rotates with a limiting rod 405 through a pin shaft, one end of the limiting rod 405 rotates with the surface of the mounting part 2 through a pin shaft, the surface of the first tooth connecting rod 403 is engaged with a second tooth connecting rod 406, the shaft center of one end of the second tooth connecting rod 406 is fixed with a second rotating shaft 407, the end of the second rotating shaft 407 is connected with the mounting part 2 through a bearing, the other end of the second tooth connecting rod 406 rotates with a second clamping rod 408 through a pin shaft, the surface of the second clamping rod 408 rotates with a connecting rod 409 through a pin shaft, the end of the connecting rod is connected with the surface of the mounting part 2 through a pin shaft 409, and anti-slip rubber blocks are fixed on the surfaces of the second clamping rod 408 and the first clamping rod 404.

In the invention, a first motor 401 is started to drive a first rotating shaft 402 to rotate, the first rotating shaft 402 drives a first tooth connecting rod 403 to rotate, the first tooth connecting rod 403 drives a first clamping rod 404 to displace, at the moment, teeth on the first tooth connecting rod 403 are used for driving a second tooth connecting rod 406 to rotate while the first tooth connecting rod 403 rotates, the second tooth connecting rod 406 drives a second clamping rod 408 to displace, and further the second clamping rod 408 and the first clamping rod 404 displace in the same direction and are relatively close to each other, so that a workpiece is clamped, the anti-skidding rubber blocks on the surfaces of the second clamping rod 408 and the first clamping rod 404 can effectively prevent skidding in the clamping process, and the second clamping rod 408 and the first clamping rod 404 are conveniently limited through a limiting rod 405 and a connecting rod 409, so that the structure is more stable.

Example 4:

The limiting component 5 comprises a driving wheel 501 fixed on the surface of the first rotating shaft 402, a driven wheel 502 is driven on the surface of the driving wheel 501 through a belt, a rotating rod 503 is fixed at the axis of the driven wheel 502, the end part of the rotating rod 503 penetrates through the installation part 2 and is rotatably connected to the inner wall of the bottom of the installation part 2 through a bearing, a worm 504 is arranged on the surface of the rotating rod 503, a worm wheel 505 is meshed with the surface of the worm 504, a lead screw 506 is fixed at the axis of the worm wheel 505, the surface of the lead screw 506 is rotatably connected with the installation part 2 through a bearing, a threaded sleeve 507 is connected to one end of the lead screw 506 in a threaded manner, a supporting plate 508 is fixed at the end part of the threaded sleeve 507, a baffle 509 is fixed on the top surface of the supporting plate 508, telescopic rods 510 are fixed on the two sides of the surface of the supporting plate 508, which are located on the threaded sleeve 507, and the end parts of the telescopic rods 510 are fixedly connected with the installation part 2.

In the invention, when the first rotating shaft 402 rotates, the driving wheel 501 is driven to rotate, the driven wheel 502 is driven to synchronously rotate through the driving wheel 501, the rotating rod 503 is driven to rotate through the rotation of the driven wheel 502, the worm 504 on the surface of the rotating rod 503 drives the turbine 505 to rotate, the screw rod 506 is driven to rotate through the turbine 505, the threaded sleeve 507 at the end part of the screw rod 506 moves, the supporting plate 508 at the end part of the threaded sleeve 507 moves and extends out, the bottom of a workpiece is supported and limited, the supporting plate 508 is conveniently limited through the arrangement of the telescopic rod 510, the effect of stable support is achieved, the clamping assembly is matched with the clamping assembly 4, the workpiece is clamped more stably, and the detection accuracy is improved.

Example 5:

The transmission assembly 8 comprises a second motor 801 fixed on one side surface of the workbench 1, an output end of the second motor 801 penetrates through the workbench 1 and is fixed with a first transmission shaft 802, an end part of the first transmission shaft 802 is rotatably connected with the workbench 1 through a bearing, a surface of the first transmission shaft 802 is fixed with a first transmission roller 803, a surface of the first transmission roller 803 is transmitted with a transmission belt 804, a surface of the transmission belt 804 is transmitted with a second transmission roller 805, an axis of the second transmission roller 805 is fixed with a second transmission shaft 806, an end part of the second transmission shaft 806 is rotatably connected with the workbench 1 through a bearing, and a surface of the transmission belt 804 is fixed with a separation barrier 807.

In the invention, a second motor 801 is started to drive a first transmission shaft 802 to rotate, a first transmission roller 803 is driven to rotate through the first transmission shaft 802, a second transmission roller 805 is driven to synchronously rotate through a conveyor belt 804 on the surface of the first transmission roller 803, so that workpieces placed on the conveyor belt 804 are transported, the labor intensity of workers is saved, the placed workpieces to be detected are conveniently separated through a separation barrier strip 807 on the surface of the conveyor belt 804, and accumulation in the transportation process is prevented.

Example 6:

The top surface of the placing box 9 is fixed with a protection plate 10, the top of the workbench 1 is fixed with a limiting block 11, one side surface of the limiting block 11 is fixed with a cylinder 12, the end part of the cylinder 12 is fixed with a push plate 13, one side surface of the workbench 1 is rotatably connected with a box door 14 through a hinge, and the surface of the box door 14 is provided with a handle.

According to the tool storage box, the cylinder 12 is started to drive the pushing plate 13 to move, unqualified workpieces transmitted on the transmission assembly 8 are pushed out, then the workpieces fall into the storage box 9, the workpieces are conveniently and intensively recycled and stored, convenience and practicability are achieved, the workpieces are prevented from falling through the protection plate 10 arranged on the surface of the storage box 9, the protection effect is achieved, other articles for tools can be conveniently placed in the storage space arranged in the workbench 1 through the box door 14 on the workbench 1, and the tools can be conveniently taken.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a neodymium iron boron permanent magnet polarity check out test set, includes workstation (1), its characterized in that, the top of workstation (1) is provided with installed part (2), the surface of workstation (1) is provided with and is used for driving adjusting part (3) that installed part (2) removed, be provided with on installed part (2) and be used for centre gripping subassembly (4) fixed to the work piece, centre gripping subassembly (4) go up the transmission have support spacing subassembly (5) spacing to the work piece, one side fixed surface of workstation (1) has curb plate (6), the fixed surface of curb plate (6) is installed polarity detecting instrument (7), be provided with on workstation (1) and be used for driving transmission assembly (8) that the work piece carried, one side below that lies in transmission assembly (8) on workstation (1) is provided with places box (9).

2. The neodymium iron boron permanent magnet polarity check out test set of claim 1, characterized in that, adjusting part (3) is including fixing fixed plate (301) on workstation (1) surface, the fixed surface of fixed plate (301) has first electric putter (302), the output of first electric putter (302) is fixed with connecting block (303), spout (304) have been seted up to the top surface of workstation (1), the inside slip of spout (304) has slider (305), the tip and connecting block (303) fixed connection of slider (305), second electric putter (306) are installed at the top of connecting block (303), the top and the installed part (2) of second electric putter (306) are fixed continuous.

3. The neodymium iron boron permanent magnet polarity detection device of claim 1, characterized in that, centre gripping subassembly (4) is including fixing first motor (401) on installed part (2) surface, the output of first motor (401) runs through installed part (2) and is fixed with first rotation axis (402), the fixed surface of first rotation axis (402) has first tooth connecting rod (403), the one end of first tooth connecting rod (403) is rotated through the round pin axle and is had first clamping bar (404), the surface of first clamping bar (404) is rotated through the round pin axle and is had gag lever post (405), the one end of gag lever post (405) is rotated through the round pin axle and is connected on the surface of installed part (2).

4. The neodymium iron boron permanent magnet polarity detection equipment of claim 3, characterized in that, the surface meshing of first tooth connecting rod (403) has second tooth connecting rod (406), the axle center department of second tooth connecting rod (406) one end is fixed with second axis of rotation (407), the tip of second axis of rotation (407) is passed through the bearing and is rotated with installed part (2) and is connected, the other end of second tooth connecting rod (406) has second clamping bar (408) through the round pin hub rotation, the surface of second clamping bar (408) has connecting rod (409) through the round pin hub rotation, the tip of connecting rod (409) is connected on the surface of installed part (2) through the round pin hub rotation, second clamping bar (408) and the surface of first clamping bar (404) all are fixed with anti-skidding rubber piece.

5. The neodymium iron boron permanent magnet polarity check out test set of claim 4, characterized in that, spacing subassembly (5) is including fixing action wheel (501) on first axis of rotation (402) surface, there is from driving wheel (502) on the surface of action wheel (501) through belt transmission, the axle center department from driving wheel (502) is fixed with dwang (503), dwang (503) tip runs through installed part (2) and rotates through the bearing and connect on the bottom inner wall of installed part (2), the surface of dwang (503) is provided with worm (504), the surface meshing of worm (504) has turbine (505), the axle center department of turbine (505) is fixed with lead screw (506), the surface of lead screw (506) passes through the bearing and is connected with installed part (2) rotation.

6. The polarity detection device for the neodymium iron boron permanent magnet according to claim 5, characterized in that one end of the screw rod (506) is connected with a threaded sleeve (507) in a threaded mode, a support plate (508) is fixed to the end portion of the threaded sleeve (507), a baffle (509) is fixed to the top surface of the support plate (508), telescopic rods (510) are fixed to two sides, located on the threaded sleeve (507), of the surface of the support plate (508), and the end portion of each telescopic rod (510) is fixedly connected with the mounting piece (2).

7. The polarity detection device of a neodymium iron boron permanent magnet according to claim 1, characterized in that the transmission assembly (8) comprises a second motor (801) fixed on one side surface of the workbench (1), an output end of the second motor (801) penetrates through the workbench (1) and is fixed with a first transmission shaft (802), an end of the first transmission shaft (802) is rotatably connected with the workbench (1) through a bearing, a first transmission roller (803) is fixed on the surface of the first transmission shaft (802), a transmission belt (804) is transmitted on the surface of the first transmission roller (803), a second transmission roller (805) is transmitted on the surface of the transmission belt (804), a second transmission shaft (806) is fixed at the axis of the second transmission roller (805), an end of the second transmission shaft (806) is rotatably connected with the workbench (1) through a bearing, and a separation bar (807) is fixed on the surface of the transmission belt (804).

8. The polarity detection device for the neodymium-iron-boron permanent magnet according to claim 1, characterized in that a protection plate (10) is fixed on the top surface of the placement box (9).

9. The polarity detection device for the neodymium iron boron permanent magnet according to claim 1, wherein a limiting block (11) is fixed to the top of the workbench (1), an air cylinder (12) is fixed to one side surface of the limiting block (11), and a pushing plate (13) is fixed to the end portion of the air cylinder (12).

10. The polarity detection device for the neodymium iron boron permanent magnet according to claim 1, wherein a door (14) is rotatably connected to one side surface of the workbench (1) through a hinge, and a handle is mounted on the surface of the door (14).