CN113457781A - Automatic crushing device and automatic crushing method for sintered neodymium-iron-boron magnet - Google Patents

Automatic crushing device and automatic crushing method for sintered neodymium-iron-boron magnet Download PDF

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Publication number
CN113457781A
CN113457781A CN202110710724.5A CN202110710724A CN113457781A CN 113457781 A CN113457781 A CN 113457781A CN 202110710724 A CN202110710724 A CN 202110710724A CN 113457781 A CN113457781 A CN 113457781A
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CN
China
Prior art keywords
iron boron
neodymium iron
feeding pipe
groups
crushing
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Granted
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CN202110710724.5A
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Chinese (zh)
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CN113457781B (en
Inventor
唐睿
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Anhui Wanci Electronics Co ltd
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Anhui One Magnet Electronic Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers

Abstract

The invention relates to an automatic crushing device for a sintered neodymium-iron-boron magnet. Automatic reducing mechanism includes: crushing bin, feeding pipe, roller set and sieving assembly; the screening assembly is arranged in the crushing bin and is positioned between the feeding pipe and the roller set; the screen assembly includes: the screening box comprises a screening box, two rotating plates I, two rotating plates II, two groups of telescopic assemblies I, two groups of telescopic assemblies II, a support, a motor I and a controller, wherein the controller is used for controlling the work of the motor I, the telescopic assemblies I and the telescopic assemblies II. According to the invention, through arranging the screening component, the neodymium iron boron magnetic groups in the neodymium iron boron magnetic powder can be separated, and then the neodymium iron boron magnetic groups are crushed, so that the crushing effect is improved. Through setting up circulation subassembly, can be with the neodymium iron boron magnetism group regrinding for complete crushing, until its crushing is complete.

Description

Automatic crushing device and automatic crushing method for sintered neodymium-iron-boron magnet
Technical Field
The invention relates to the field of production of sintered neodymium-iron-boron magnets, in particular to an automatic crushing device and an automatic crushing method for sintered neodymium-iron-boron magnets.
Background
The neodymium-iron-boron magnet is also called a neodymium-iron-boron magnet, and is a tetragonal crystal formed of neodymium, iron, and boron. The neodymium iron boron magnet has high magnetism and is widely applied to electronic products. In the production process of the neodymium iron boron magnet, the neodymium iron boron magnet needs to be crushed after a smelting process, and then a multifunctional additive is added. Because the neodymium iron boron magnetic powder has the reunion characteristic, consequently can coalesce into the neodymium iron boron magnetic group of equidimension not, if directly smash it, owing to there is the magnetic, can lead to its crushing effect poor, and owing to after smashing, can have some neodymium iron boron magnetic group can't be smashed by completely, lead to having certain neodymium iron boron magnetic group in the material after smashing.
Disclosure of Invention
Based on this, it is necessary to provide an automatic crushing device and an automatic crushing method for sintered neodymium iron boron magnet, aiming at the problem of how to sieve the clustered neodymium iron boron magnet clusters so as to crush the neodymium iron boron magnet clusters circularly until the neodymium iron boron magnet clusters are completely crushed.
The invention is realized by adopting the following technical scheme: the utility model provides an automatic reducing mechanism of sintered neodymium iron boron magnetism body, its is used for smashing neodymium iron boron magnetism group, and it includes:
the lower end of the crushing bin is provided with an opening and is used for discharging neodymium iron boron magnetic powder;
the feeding pipe is arranged on the crushing bin;
the roller set is arranged in the crushing bin, is positioned below the feeding pipe and is used for crushing the screened neodymium iron boron magnetic clusters;
the circulating assembly is used for conveying the neodymium iron boron magnetic clusters which are not completely crushed by the roller set into the feeding pipe; and
the screening assembly is arranged in the crushing bin and is positioned between the feeding pipe and the roller set; the screen assembly includes:
the screening box is rotatably arranged in the crushing bin, a plurality of screen holes are distributed on the screening box, and the aperture of each screen hole is the same as the outer diameter of the required neodymium iron boron magnetic powder;
the two first rotating plates are symmetrically and rotatably arranged at one end of the screening box, and the rotating directions of the two first rotating plates face the inner side of the screening box;
the two second rotating plates are symmetrically and rotatably arranged at the other end of the screening box, and the rotating directions of the two second rotating plates face the outer side of the screening box; the second rotating plate and the first rotating plate have the same structure and are symmetrically arranged;
the telescopic ends of the two groups of first telescopic assemblies are respectively hinged with the two rotating plates, and the fixed ends of the two groups of first telescopic assemblies are respectively hinged with the two positioning rods;
the telescopic ends of the two groups of telescopic assemblies II are respectively hinged with the two rotating plates II, and the fixed ends of the two groups of telescopic assemblies II are respectively hinged with the two positioning rods II;
the bracket is fixed in the screening box, the first two positioning rods are fixed on one side of the bracket, which faces the first rotating plate, and the second two positioning rods are fixed on one side of the bracket, which faces the second rotating plate;
the first motor is fixed on the crushing bin and used for driving the screening box to rotate; and
the controller is used for controlling the first motor, the first telescopic assembly and the second telescopic assembly to work; the control method of the controller comprises the following steps:
step S1, controlling the first motor to drive the first two rotating plates to rotate below the feeding pipe and then stopping the first motor;
step S2, after detecting that the first two rotating plates are positioned below the feeding pipe, the controller controls the two groups of telescopic assemblies to synchronously contract, so that the two rotating plates are driven to rotate towards the inner side of the screening box;
step S3, a predetermined time T is passed1Then, the controller controls the two groups of telescopic assemblies to synchronously extend until the two rotating plates are driven to return to the initial position, and at the moment, the controller controls the motor to drive the screening box to rotate;
step S4, the controller controls the motor for a predetermined time T2Working when the motor has a working time exceeding a predetermined time T2When the feeding pipe is in use, the motor drives the two rotating plates to rotate to the position below the feeding pipe and then stops;
step S5, the controller controls the two groups of telescopic assemblies to synchronously extend, so that the two rotary plates are driven to rotate towards the outer sides of the two-way screening box until a preset time T passes3Then, the controller controls the two groups of telescopic assemblies to contract synchronously until the two groups of telescopic assemblies are drivenAfter the second rotating plate returns to the initial position, step S2 is executed.
Above-mentioned through setting up screening subassembly, can isolate the neodymium iron boron magnetism group in the neodymium iron boron magnetic, later smash the neodymium iron boron magnetism group to crushing effect has been promoted. Through the rotation of screening case, can drive its inside neodymium iron boron magnetism group and can take place certain collision each other to can make neodymium iron boron magnetism group preliminary crushing. Through setting up circulation subassembly, can be with the neodymium iron boron magnetism group regrinding for complete crushing, until its crushing is complete. Through setting up the controller, can the operating time of accurate control flexible subassembly one, flexible subassembly two, motor one to can the inside screening condition of accurate control screening case.
As a further improvement of the above aspect, the circulation assembly includes:
the screen is positioned on one side of the roller set, which is far away from the screening box;
the motor II is fixed on the circulating bin;
the rotating shaft is rotatably arranged in the circulating bin, and one end of the rotating shaft is coaxially connected with the rotating end of the second motor so that the second motor works to drive the rotating shaft to rotate synchronously;
the flood dragon blades are arranged on the outer side of the rotating shaft and synchronously rotate with the rotating shaft so as to convey the incompletely-crushed neodymium iron boron magnetic groups in the circulating bin into the feeding pipe; and
and the feed back outlet is used for communicating the circulating bin with the feed pipe.
As a further improvement of the scheme, the screen is also provided with a plurality of vibrators for driving the screen to vibrate.
As a further improvement of the above scheme, the screen is obliquely arranged in the crushing bin, the crushing bin positioned at the lowest end side of the screen is also provided with a feed back inlet for transferring the incompletely crushed neodymium iron boron magnetic groups, and the feed back inlet is communicated with a circulating bin fixed at one side of the crushing bin.
As a further improvement of the proposal, the feed back outlet is obliquely arranged between the circulating bin and the feed pipe, and the lowest end of the feed back outlet is positioned on the feed pipe.
As a further improvement of the scheme, a gap is reserved between one end, extending into the crushing bin, of the feeding pipe and the screening box, and the gap is smaller than the outer diameter of the neodymium iron boron magnetic group.
As a further improvement of the scheme, when the first rotating plate and the second rotating plate return to the initial positions and rotate along with the screening box, the first rotating plate and the second rotating plate are not contacted with the feeding pipe.
As a further improvement of the scheme, the two rotating plates I and the feeding pipe are respectively provided with a sensor, and the position of the two rotating plates I relative to the feeding pipe is sensed through the sensors, so that the two rotating plates I are stopped below the feeding pipe.
As a further improvement of the scheme, the mesh aperture on the screen is the same as that of the screening box.
The invention also provides an automatic crushing method of the sintered neodymium iron boron magnet, which is used for crushing the neodymium iron boron magnet groups, and the automatic crushing method is applied to the automatic crushing device of the sintered neodymium iron boron magnet; the automatic crushing method comprises the following steps:
separating the neodymium iron boron magnetic groups from the neodymium iron boron magnetic powder by a screening box;
crushing the separated neodymium iron boron magnetic clusters through a roller set to obtain neodymium iron boron magnetic powder and incompletely crushed neodymium iron boron magnetic clusters;
separating the neodymium iron boron magnetic powder from the incompletely crushed neodymium iron boron magnetic groups through a screen, and conveying the incompletely crushed neodymium iron boron magnetic groups into a circulating bin;
through circulation subassembly will not transfer to the screening incasement with the neodymium iron boron magnetism group that smashes completely, realize the circulation and smash.
The invention has the following beneficial effects:
1. through setting up screening subassembly, can isolate the neodymium iron boron magnetism group in the neodymium iron boron magnetic, later smash the neodymium iron boron magnetism group to crushing effect has been promoted. Through the rotation of screening case, can drive its inside neodymium iron boron magnetism group and can take place certain collision each other to can make neodymium iron boron magnetism group preliminary crushing. Through setting up circulation subassembly, can be with the neodymium iron boron magnetism group regrinding for complete crushing, until its crushing is complete. Through setting up the controller, can the operating time of accurate control flexible subassembly one, flexible subassembly two, motor one to can the inside screening condition of accurate control screening case.
2. Through setting up screen cloth, feed back import and circulation storehouse, can collect not kibbling neodymium iron boron magnetism group completely, prevent that it from mixing in the neodymium iron boron magnetism powder.
3. Still through setting up the circulation subassembly, can shift the not complete kibbling neodymium iron boron magnetism group of collection to in the feed pipe to can realize the circulation and smash, further promote crushing effect.
Drawings
Fig. 1 is a schematic structural diagram of an automatic crushing device for a sintered nd-fe-b magnet according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a screening box of the automatic sintered nd-fe-b magnet crushing device in fig. 1.
Fig. 3 is a flowchart of a control method of a controller in an automatic crushing device for sintered ndfeb magnets according to embodiment 1 of the present invention.
Fig. 4 is a flowchart of an automatic grinding method for a sintered ndfeb magnet according to embodiment 2 of the present invention.
In the figure: 1. a crushing bin; 2. a feed pipe; 3. screening the box; 4. rotating the first plate; 5. a second rotating plate; 6. a support; 7. a first positioning rod; 8. a second positioning rod; 9. a first telescopic component; 10. a second telescopic assembly; 11. a roller set; 12. screening a screen; 13. a vibrator; 14. a feed back inlet; 15. circulating the bin; 16. a second motor; 17. a rotating shaft; 18. flood dragon leaves; 19. and a feed back outlet.
The present invention is described in further detail with reference to the drawings and the detailed description.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Example 1
The embodiment discloses a production method of a sintered neodymium-iron-boron magnet, which specifically comprises the following steps:
preparing a plurality of raw materials, designing the components of the raw materials, and carrying out ingredient calculation and weighing according to the designed proportion to obtain a preliminary mixture.
And smelting the primary mixture, then sequentially carrying out ingot casting/sheet casting and crushing treatment, and then adding a multifunctional additive to obtain mixed powder.
And analyzing the particle size distribution of the mixed powder, and then sequentially carrying out magnetic field orientation and profiling treatment, sintering treatment and tempering treatment on the mixed powder to obtain the black body blank.
And machining the black body blank to obtain a white body blank, performing surface coating treatment on the white body blank, cutting, sintering and magnetizing to obtain the sintered neodymium-iron-boron magnet.
Referring to fig. 1, the embodiment further discloses an automatic crushing device for a sintered ndfeb magnet, which is applied to a step of fully crushing ndfeb magnetic powder in a production method of the sintered ndfeb magnet. Automatic reducing mechanism of sintered neodymium iron boron magnetism body includes: crushing storehouse 1, inlet pipe 2, roller set 11 and screening subassembly.
Wherein, smash the upper end and the inlet pipe 2 intercommunication in storehouse 1 for carry the neodymium iron boron magnet to smash in the storehouse 1 and smash. The lower end of the crushing bin 1 is provided with an opening for discharging neodymium iron boron magnetic powder.
The roller set 11 sets up in the inside of smashing storehouse 1 for smash neodymium iron boron magnetic powder and neodymium iron boron magnetism group. The roller set 11 not only can smash neodymium iron boron magnetism group, can further smash neodymium iron boron magnetic moreover.
Screening subassembly sets up in smashing storehouse 1, and is located between inlet pipe 2 and the roller set 11, and it is used for sieving out in the neodymium iron boron magnetism group follow neodymium iron boron magnetic. The screen assembly includes: screening case 3, two first 4, two 5, two first 9, two sets of two 10, support 6, motor one and controller of flexible subassembly of two rotating plates.
Referring to fig. 2, the sieving box 3 is rotatably disposed in the pulverizing bin 1, and a plurality of sieve holes are distributed on the sieving box 3, and the aperture of each sieve hole is the same as the outer diameter of the required neodymium iron boron magnetic powder. In order to avoid the interference of the feeding pipe 2 on the screening box 3 when the screening box rotates, a gap is reserved between one end of the feeding pipe 2 extending into the crushing bin 1 and the screening box 3, and the gap is smaller than the outer diameter of the neodymium iron boron magnetic group. Can prevent effectively like this that the neodymium iron boron magnetism group directly drops the outside of running roller group 11, lead to unable smashing it.
Two first rotating plates 4 are symmetrically and rotatably arranged at one end of the screening box 3, and the rotating directions of the two first rotating plates 4 face the inner side of the screening box 3. When two rotor plates 4 rotate to the inboard of screening case 3, can be effectively be convenient for enter into screening case 3 with the neodymium iron boron magnetic powder that is detained in inlet pipe 2.
The two rotating plates 5 are symmetrically and rotatably arranged at the other end of the screening box 3, and the rotating directions of the two rotating plates 5 face the outer side of the screening box 3. The second rotating plate 5 and the first rotating plate 4 are identical in structure and are symmetrically arranged. When two rotor plates 5 rotate to the outside of screening case 3, can be convenient for detain the neodymium iron boron magnetism group in screening case 3 after screening and transfer to in the roller set 11 smash.
The telescopic ends of the two groups of telescopic assemblies I9 are respectively hinged with the two rotating plates I4, and the fixed ends of the two groups of telescopic assemblies I are respectively hinged with the two positioning rods I7. The two rotating plates (4) can be driven to rotate towards the inner side of the screening box (3) through the contraction of the telescopic ends of the two groups of telescopic assemblies (9). The two rotating plates I4 can be driven to return to the initial position through the extension of the telescopic ends of the two groups of telescopic assemblies I9. The type of the first telescopic assembly 9 is not limited, and the first telescopic assembly can be an air cylinder, a hydraulic cylinder and the like, as long as the first telescopic assembly can drive the first rotating plate 4 to rotate. In order to avoid the interference between the two rotating plates one 4 and the feeding pipe 2 along with the rotation of the screening box 3 when the two rotating plates one 4 return to the initial position, the two rotating plates one 4 are not contacted with the feeding pipe 2 after returning to the initial position.
The telescopic ends of the two groups of telescopic assemblies 10 are respectively hinged with the two rotating plates 5, and the fixed ends of the two groups of telescopic assemblies are respectively hinged with the two positioning rods 8. Through the extension of the flexible end of two sets of flexible subassemblies two 10, can drive two rotor plates two 5 and rotate towards the outside of screening case 3. The two rotating plates 5 can be driven to return to the initial position through the contraction of the two groups of telescopic assemblies 10. The type of the second telescopic assembly 10 is not limited, and the second telescopic assembly can be an air cylinder, a hydraulic cylinder and the like, as long as the second rotary plate 5 can be driven to rotate through telescopic. In order to avoid the two rotating plates 5 from interfering with the feeding pipe 2 along with the rotation of the screening box 3 when the two rotating plates are returned to the initial position, the two rotating plates 5 are not in contact with the feeding pipe 2 after being returned to the initial position.
The support 6 is fixed in screening case 3, and two locating levers 7 are fixed in one side of support 6 towards rotating plate 4, and two locating levers 8 are fixed in one side of support 6 towards rotating plate two 5, and locating lever 7 and locating lever two 8 can the symmetry set up, also can the asymmetric setting. The two positioning rods I7 are symmetrically arranged at the two ends of one side of the support 6, and the two positioning rods II 8 are symmetrically arranged at the two ends of the other side of the support 6. Therefore, the two rotating plates I4 can rotate synchronously, and the two rotating plates II 5 rotate synchronously.
The first motor is fixed on the screening box 3, and the rotating end of the first motor is coaxially fixed with the central shaft of the screening box 3, so that the screening box 3 rotates along with the rotation of the rotating end of the first motor. Screening case 3 can drive its inside neodymium iron boron magnetic and neodymium iron boron magnetism group motion when rotating, and the neodymium iron boron magnetic can be followed screening case 3's sieve mesh direct separation and gone out, and screening case 3 interior surplus neodymium iron boron magnetism group can take place certain collision each other to can make neodymium iron boron magnetism group preliminary crushing.
Referring to fig. 3, the controller is used for controlling the operation of the first motor, the first telescopic assembly 9 and the second telescopic assembly 10. The control method of the controller comprises the following steps:
and step S1, controlling the first motor to drive the first two rotating plates 4 to rotate to the lower part of the feeding pipe 2 and then stopping.
And step S2, after the two rotating plates I4 are detected to be positioned below the feeding pipe 2, the controller controls the two groups of telescopic assemblies I9 to contract synchronously, so that the two rotating plates I4 are driven to rotate towards the inner side of the screening box 3. Wherein, in order to facilitate the position of detecting two rotor plates 4, all be equipped with the inductor on two rotor plates 4 and the inlet pipe 2. The position of the two rotating plates one 4 relative to the feeding pipe 2 is sensed by a sensor, so that the two rotating plates one 4 are stopped below the feeding pipe 2.
Step S3, a predetermined time T is passed1And then, the controller controls the two groups of first telescopic assemblies 9 to synchronously extend until the two rotating plates 4 are driven to return to the initial position, and at the moment, the controller controls the motor to drive the screening box 3 to rotate. Screening case 3 can drive its inside neodymium iron boron magnetic and neodymium iron boron magnetism group motion when rotating, and the neodymium iron boron magnetic can be followed the sieve mesh direct separation of screening case 3 and gone out, and neodymium iron boron magnetism group can be detained in screening case 3.
Step S4, the controller controls the motor for a predetermined time T2Working when the motor has a working time exceeding a predetermined time T2When the feeding pipe 2 is in use, the first motor drives the two rotating plates 4 to rotate to the position below the feeding pipe 2 and then stops.
Step S5, the controller controlsTwo sets of two 10 synchronous extensions of flexible subassembly to drive two rotor plates two 5 and rotate to the outside of screening case 3, neodymium iron boron magnetism group can break away from in the screening case 3 this moment. Until a predetermined time T has elapsed3And after the neodymium iron boron magnetic groups in the screening box 3 are completely separated, the controller controls the two groups of telescopic assemblies 10 to synchronously contract until the two rotating plates 5 are driven to return to the initial position, and then the step S2 is executed.
When the roller set 11 crushes the ndfeb magnetic clusters, there may be a certain amount of ndfeb magnetic clusters that cannot be completely crushed. In order to avoid discharging incompletely crushed neodymium iron boron magnetic clusters from the lower end opening of the screening box 3, a screen 12 is further arranged in the crushing bin 1 which is positioned on one side of the roller set 11 far away from the screening box 3. The mesh openings of the screen 12 are the same size as the mesh openings of the screening box 3. In order to avoid the neodymium iron boron magnetic powder from accumulating on the screen 12, a plurality of vibrators 13 for driving the screen 12 to vibrate are further arranged on the screen.
In order to facilitate the recovery of the incompletely crushed neodymium iron boron magnet, the screen 12 is obliquely arranged in the crushing bin 1, and the crushing bin 1 at the lowest end side of the screen is also provided with a material return inlet 14 for transferring the incompletely crushed neodymium iron boron magnet group. The feed back inlet 14 is communicated with a circulating bin 15 fixed at one side of the crushing bin 1. The circulating bin 15 is used for recycling the incompletely crushed neodymium iron boron magnetic groups.
After the neodymium iron boron magnetic groups which are not completely crushed are recovered by the circulating bin 15, the neodymium iron boron magnetic groups need to be transferred into the feeding pipe 2 for circulating and crushing. In order to transfer the incompletely crushed neodymium iron boron magnetic clusters, a circulating component for conveying the incompletely crushed neodymium iron boron magnetic clusters into the feeding pipe 2 is arranged in the circulating bin 15. The circulation assembly includes: motor two 16, pivot 17, flood dragon blade 18 and feed back export 19.
The second motor 16 is fixed on the circulating bin 15, and the rotating end of the second motor is coaxially fixed with a rotating shaft 17 which is rotatably arranged in the circulating bin 15. The rotating end of the second motor 16 rotates to drive the rotating shaft 17 to rotate synchronously.
Flood dragon blade 18 is fixed in the outside of pivot 17, rotates with pivot 17 synchronous to carry the feeding pipe 2 with the not complete kibbling neodymium iron boron magnetism group that is located inside the circulation storehouse 15.
The feed back outlet 19 is used for communicating the circulating bin 15 with the feeding pipe 2 so as to convey the incompletely crushed neodymium-iron-boron magnetic clusters in the circulating bin 15 into the feeding pipe 2. The feed back outlet 19 is obliquely arranged between the circulating bin 15 and the feed pipe 2, and the lowest end of the feed back outlet 19 is positioned on the feed pipe 2.
According to the invention, through arranging the screening component, the neodymium iron boron magnetic groups in the neodymium iron boron magnetic powder can be separated, and then the neodymium iron boron magnetic groups are crushed, so that the crushing effect is improved. Through the rotation of screening case 3, can drive its inside neodymium iron boron magnetism group and can take place certain collision each other to can make neodymium iron boron magnetism group preliminary crushing. Through setting up circulation subassembly, can be with the neodymium iron boron magnetism group regrinding for complete crushing, until its crushing is complete. Through setting up the controller, can the accurate control flexible subassembly one 9, flexible subassembly two 10, the operating time of motor one to can the inside screening condition of accurate control screening case 3.
According to the invention, through the arrangement of the screen 12, the feed back inlet 14 and the circulating bin 15, the incompletely crushed neodymium iron boron magnetic clusters can be collected, and are prevented from being mixed in neodymium iron boron magnetic powder.
The invention also can transfer the collected incompletely crushed neodymium iron boron magnetic groups into the feeding pipe 2 by arranging the circulating component, thereby realizing circulating crushing and further improving the crushing effect.
Example 2
Referring to fig. 4, this embodiment describes an automatic crushing method for a sintered ndfeb magnet, where the automatic crushing method is applied to the automatic crushing device for a sintered ndfeb magnet in embodiment 1, and crushes ndfeb magnetic clusters. The automatic crushing method comprises the following steps:
the neodymium iron boron magnetic groups are separated from the neodymium iron boron magnetic powder through a screening box 3.
The separated neodymium iron boron magnetic groups are crushed through the roller set 11 to obtain neodymium iron boron magnetic powder and incompletely crushed neodymium iron boron magnetic groups.
The neodymium iron boron magnetic powder is separated from the incompletely crushed neodymium iron boron magnetic groups through the screen 12, and the incompletely crushed neodymium iron boron magnetic groups are conveyed into the circulating bin 15.
Through circulation subassembly will not totally kibbling neodymium iron boron magnetism group transfer to screening case 3 in, realize the circulation and smash.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims (10)

1. The utility model provides an automatic reducing mechanism of sintered neodymium iron boron magnet, its is used for smashing neodymium iron boron magnetism group, and its characterized in that, it includes:
the lower end of the crushing bin (1) is provided with an opening and is used for discharging neodymium iron boron magnetic powder;
the feeding pipe (2) is arranged on the crushing bin (1);
the roller set (11) is arranged in the crushing bin (1), is positioned below the feeding pipe (2) and is used for crushing the sieved neodymium iron boron magnetic clusters;
the circulating assembly is used for conveying the neodymium iron boron magnetic clusters which are not completely crushed by the roller set (11) into the feeding pipe (2); and
the screening assembly is arranged in the crushing bin (1) and is positioned between the feeding pipe (2) and the roller set (11); the screen assembly includes:
the screening box (3) is rotatably arranged in the crushing bin (1), a plurality of screen holes are distributed on the screening box (3), and the aperture of each screen hole is the same as the outer diameter of the required neodymium iron boron magnetic powder;
the two rotating plates I (4) are symmetrically and rotatably arranged at one end of the screening box (3), and the rotating directions of the two rotating plates I (4) face the inner side of the screening box (3);
the two rotating plates (5) are symmetrically and rotatably arranged at the other end of the screening box (3), and the rotating directions of the two rotating plates (5) face the outer side of the screening box (3); the second rotating plate (5) and the first rotating plate (4) have the same structure and are symmetrically arranged;
the telescopic ends of the two groups of first telescopic assemblies (9) are respectively hinged with the two rotating plates I (4), and the fixed ends of the two groups of first telescopic assemblies are respectively hinged with the two positioning rods I (7);
the telescopic ends of the two groups of telescopic assemblies II (10) are respectively hinged with the two rotating plates II (5), and the fixed ends of the two groups of telescopic assemblies II are respectively hinged with the two positioning rods II (8);
the bracket (6) is fixed in the screening box (3), the first two positioning rods (7) are fixed on one side, facing the first rotating plate (4), of the bracket (6), and the second two positioning rods (8) are fixed on one side, facing the second rotating plate (5), of the bracket (6);
the motor I is fixed on the crushing bin (1) and used for driving the screening box (3) to rotate; and
the controller is used for controlling the first motor, the first telescopic assembly (9) and the second telescopic assembly (10) to work; the control method of the controller comprises the following steps:
s1, controlling the first motor to drive the first two rotating plates (4) to rotate to the position below the feeding pipe (2) and then stopping;
s2, after detecting that the two rotating plates I (4) are located below the feeding pipe (2), the controller controls the two groups of telescopic assemblies I (9) to contract synchronously, so that the two rotating plates I (4) are driven to rotate towards the inner side of the screening box (3);
step S3, a predetermined time T is passed1Then, the controller controls the two groups of first telescopic assemblies (9) to extend synchronously until the two rotating plates (4) are driven to return to the initial position, and at the moment, the controller controls the motor to drive the screening box (3) to rotate;
step S4, the controller controls the motor for a predetermined time T2Operate when said electricityThe working time of the machine exceeds the preset time T2When the feeding pipe is used, the first motor drives the two rotating plates (4) to rotate to the position below the feeding pipe (2) and then stops;
s5, the controller controls the two groups of second telescopic assemblies (10) to extend synchronously, so that the two rotating plates (5) are driven to rotate towards the outer side of the screening box (3) until a preset time T passes3And then, the controller controls the two groups of second telescopic assemblies (10) to synchronously contract until the two rotating plates (5) are driven to return to the initial position, and then the step S2 is executed.
2. The automatic sintered nd-fe-b magnet crushing device of claim 1, wherein the circulation assembly comprises:
a screen (12) located on the side of the roller set (11) remote from the screening box (3);
a second motor (16) fixed on the circulating bin (15);
the rotating shaft (17) is rotatably arranged in the circulating bin (15), and one end of the rotating shaft is coaxially connected with the rotating end of the second motor (16) so that the second motor (16) works to drive the rotating shaft (17) to rotate synchronously;
the flood dragon blades (18) are arranged on the outer side of the rotating shaft (17) and synchronously rotate with the rotating shaft (17) so as to convey the incompletely crushed neodymium iron boron magnetic clusters in the circulating bin (15) into the feeding pipe (2); and
a feed back outlet (19) for communicating the circulation bin (15) with the feed pipe (2).
3. The automatic smashing device for the sintered neodymium iron boron magnet according to claim 2 is characterized in that a plurality of vibrators (13) for driving the screen (12) to vibrate are further arranged on the screen.
4. The automatic smashing device for the sintered neodymium-iron-boron magnet according to claim 3, wherein the screen (12) is obliquely arranged in the smashing bin (1), the smashing bin (1) located on one side of the lowest end of the screen is further provided with a material returning inlet (14) for transferring incompletely smashed neodymium-iron-boron magnetic groups, and the material returning inlet (14) is communicated with a circulating bin (15) fixed on one side of the smashing bin (1).
5. The automatic smashing device for the sintered neodymium-iron-boron magnet, according to claim 2, is characterized in that a return outlet (19) is obliquely arranged between the circulating bin (15) and the feeding pipe (2), and the lowest end of the return outlet (19) is located on the feeding pipe (2).
6. The automatic crushing device for the sintered neodymium-iron-boron magnet according to claim 1, wherein a gap is formed between one end, extending into the crushing bin (1), of the feeding pipe (2) and the screening box (3), and the gap is smaller than the outer diameter of the neodymium-iron-boron magnet mass.
7. The automatic crushing device for the sintered NdFeB magnet according to claim 1, wherein when the first rotating plate (4) and the second rotating plate (5) return to the initial positions and then rotate along with the screening box (3), the first rotating plate (4) and the second rotating plate (5) are not in contact with the feeding pipe (2).
8. The automatic pulverizing apparatus of sintered nd-fe-b magnet according to claim 1, wherein in step S2, the two rotating plates one (4) and the feeding pipe (2) are provided with sensors, and the position of the two rotating plates one (4) relative to the feeding pipe (2) is sensed by the sensors, so that the two rotating plates one (4) are stagnant under the feeding pipe (2).
9. The automatic pulverizing device for sintered NdFeB magnet according to claim 2, wherein the mesh aperture on the screen (12) is the same size as the mesh aperture of the screening box (3).
10. An automatic grinding method for sintered NdFeB magnets, which is used for grinding NdFeB magnetic groups, and is characterized in that the automatic grinding method is applied to the automatic grinding device for the sintered NdFeB magnets according to any one of claims 1 to 9; the automatic crushing method comprises the following steps:
separating the neodymium iron boron magnetic groups from the neodymium iron boron magnetic powder by a screening box (3);
crushing the separated neodymium iron boron magnetic groups through a roller set (11) to obtain neodymium iron boron magnetic powder and incompletely crushed neodymium iron boron magnetic groups;
separating the neodymium iron boron magnetic powder from the incompletely crushed neodymium iron boron magnetic groups through a screen (12), and conveying the incompletely crushed neodymium iron boron magnetic groups into a circulating bin (15);
through circulation subassembly will not totally kibbling neodymium iron boron magnetism group transfer to in screening case (3), realize the circulation and smash.
CN202110710724.5A 2021-06-25 2021-06-25 Automatic crushing device and automatic crushing method for sintered neodymium-iron-boron magnet Active CN113457781B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10159602A1 (en) * 2001-12-05 2003-06-12 Palmer Gmbh Maschf Device for disposing of kitchen food waste has reduction mechanism, water extraction unit in combination with worm conveyor, filter cylinder, milling mechanism, grease/starch separator
JP2003251218A (en) * 2002-03-01 2003-09-09 Toyo Tire & Rubber Co Ltd Cinder sorter after co-combustion of coal and waste tire
CN107252717A (en) * 2017-07-17 2017-10-17 杜鑫 Recyclable iron waste material crushing separator in a kind of building waste
CN207872354U (en) * 2017-12-23 2018-09-18 范志 A kind of concrete crushing retracting device
CN110639658A (en) * 2019-09-23 2020-01-03 安徽万磁电子有限公司 Automatic crushing device and crushing method for neodymium iron boron magnetic powder blocks
CN112317055A (en) * 2020-10-27 2021-02-05 杜维 Small-size building material grinder for building engineering
CN212524268U (en) * 2020-04-24 2021-02-12 上海筱启新能源科技有限公司 Dispel useless metal device in building rubbish

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10159602A1 (en) * 2001-12-05 2003-06-12 Palmer Gmbh Maschf Device for disposing of kitchen food waste has reduction mechanism, water extraction unit in combination with worm conveyor, filter cylinder, milling mechanism, grease/starch separator
JP2003251218A (en) * 2002-03-01 2003-09-09 Toyo Tire & Rubber Co Ltd Cinder sorter after co-combustion of coal and waste tire
CN107252717A (en) * 2017-07-17 2017-10-17 杜鑫 Recyclable iron waste material crushing separator in a kind of building waste
CN207872354U (en) * 2017-12-23 2018-09-18 范志 A kind of concrete crushing retracting device
CN110639658A (en) * 2019-09-23 2020-01-03 安徽万磁电子有限公司 Automatic crushing device and crushing method for neodymium iron boron magnetic powder blocks
CN212524268U (en) * 2020-04-24 2021-02-12 上海筱启新能源科技有限公司 Dispel useless metal device in building rubbish
CN112317055A (en) * 2020-10-27 2021-02-05 杜维 Small-size building material grinder for building engineering

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Address after: 231524 shitouzhen Industrial Park, Lujiang County, Hefei City, Anhui Province

Patentee after: Anhui Wanci Electronics Co.,Ltd.

Address before: 231524 shitouzhen Industrial Park, Lujiang County, Hefei City, Anhui Province

Patentee before: ANHUI ONE MAGNET ELECTRONIC Co.,Ltd.