CN112452440B - Automatic neodymium iron boron magnetic powder block crushing device and automatic crushing method thereof - Google Patents

Abstract

The invention discloses an automatic crushing device and an automatic crushing method for neodymium iron boron magnetic powder blocks. The neodymium iron boron magnetic powder block is subjected to vibration screening through the vibration dispersion mechanism, the neodymium iron boron magnetic powder block subjected to vibration screening is ground through the grinding mechanism, the air blowing recovery mechanism blows the magnetic powder into the recovery shell for recovery, small powder groups and part of the magnetic powder can fall onto the second screen mesh for screening, the small powder groups can roll down from the second screen mesh into the grinding shell, the magnetic powder directly falls into the collection barrel, the small powder groups can be further broken under the rolling of the roller set, meanwhile, some larger magnetic blocks can be ground, and the magnetic powder can fall onto the conveying assembly and is conveyed into the collection barrel. The invention can improve the crushing and screening efficiency, can also improve the utilization rate of magnetic materials, improves the crushing effect of the neodymium iron boron magnetic powder blocks and realizes full-automatic circulation.

Description

Automatic neodymium iron boron magnetic powder block crushing device and automatic crushing method thereof

The application is a divisional application with the application number of CN201910899512.9 and the application date of 2019/09/23 and the name of the invention is an automatic crushing device of neodymium iron boron magnetic powder blocks and a crushing method thereof.

Technical Field

The invention relates to an automatic crushing device and an automatic crushing method thereof in the technical field of crushing, in particular to an automatic crushing device and an automatic crushing method for neodymium iron boron magnetic powder blocks.

Background

The neodymium-iron-boron magnet is a tetragonal crystal formed of neodymium, iron, and boron. This magnet is a permanent magnet that is second only to absolute zero holmium magnets in magnetism today and is also the most commonly used rare earth magnet. Neodymium iron boron magnets are widely used in electronic products such as hard disks, mobile phones, earphones, and battery powered tools. The neodymium iron boron is divided into sintered neodymium iron boron and bonded neodymium iron boron, and the bonded neodymium iron boron is magnetic in all directions and is corrosion-resistant; the sintered neodymium iron boron is easy to corrode, and the surface of the sintered neodymium iron boron needs to be plated with zinc, nickel, environment-friendly zinc, environment-friendly nickel, nickel copper nickel, environment-friendly nickel copper nickel and the like. The sintered neodymium iron boron is generally divided into axial magnetization and radial magnetization according to the required working surface.

In the production process of the neodymium-iron-boron permanent magnetic material, as the neodymium-iron-boron powder has the agglomeration characteristic, the neodymium-iron-boron powder can be agglomerated into neodymium-iron-boron magnetic powder blocks, and the screening efficiency can be greatly influenced when the neodymium-iron-boron magnetic powder is screened. Moreover, the great neodymium iron boron magnetic path of particle diameter often can exist among the neodymium iron boron magnetic powder piece, if directly sieve it, can cause a large amount of wastes, and then difficult realization is directly smashed to neodymium iron boron magnetic powder piece, owing to there being the magnetic, crushing efficiency is not high simultaneously. Therefore, the neodymium iron boron magnetic powder block needs to be screened and crushed.

Disclosure of Invention

The invention provides an automatic neodymium iron boron magnetic powder block crushing device and an automatic neodymium iron boron magnetic block crushing method, and aims to solve the technical problem that the screening efficiency and the crushing efficiency of an existing neodymium iron boron magnetic powder block screening device or an existing neodymium iron boron magnetic block crushing device are not high.

The invention is realized by adopting the following technical scheme: the utility model provides an automatic reducing mechanism of neodymium iron boron magnetic powder piece, it includes:

the vibration dispersion mechanism is used for screening the neodymium iron boron magnetic powder blocks input from the outside;

the grinding mechanism is used for grinding the neodymium iron boron magnetic powder blocks falling from the vibration dispersion mechanism;

the blast air recovery mechanism comprises a blast air blower, a screen drum, a recovery shell and a plurality of electromagnets; the screen cylinder is arranged at the bottom end of the vibration dispersion mechanism and surrounds the mincing mechanism; the air blower and the recovery shell are positioned at two opposite sides of the screen drum, and a plurality of through holes are formed in the two side walls of the screen drum, which are close to the air blower and the recovery shell; the blower is used for blowing air to the inside of the screen cylinder, so that the magnetic powder which is positioned in the screen cylinder and is ground by the grinding mechanism passes through the through holes and is collected in the recovery shell; the electromagnet is arranged on the outer wall of the recovery shell;

the screening and collecting mechanism comprises a collecting barrel and at least one layer of screen II; the collecting barrel is arranged at the bottom end of the screen cylinder and is used for collecting neodymium iron boron magnetic powder blocks falling from the screen cylinder; a first perforation and a second perforation are formed on the side wall of the collecting barrel; the bottom end of the recovery shell is communicated with the collecting barrel through a perforation; the screen II is obliquely arranged in the collecting barrel, one end of the screen II, which is obliquely upward, is positioned above the first through hole, and the other end of the screen II, which is obliquely downward, penetrates through the second through hole;

the crushing mechanism comprises a crushing shell, a roller set, at least one layer of screen mesh III and a conveying assembly; the crushing shell is positioned on one side of the collecting barrel, at least one first outlet corresponding to the at least one layer of screen mesh III is formed in the side wall far away from the second perforated hole, and a second outlet is formed in the side wall close to the second perforated hole; one end of the screen II, which faces downwards in an inclined mode, is positioned in the crushing shell; the roller set is arranged in the crushing shell and is used for rolling the neodymium iron boron magnetic powder blocks rolled down from the second screen mesh; the screen mesh III is obliquely arranged on the crushing shell, and one end of the screen mesh III which is obliquely downward is clamped in the corresponding outlet I; the conveying assembly is arranged in the crushing shell, is positioned below the third screen mesh and is used for conveying the magnetic powder falling from the third screen mesh into the collecting barrel from the second outlet; the apertures of the third screen and the second screen are the same and smaller than the screening aperture of the vibration dispersion mechanism;

the detection mechanism is used for detecting the throughput of the neodymium iron boron magnetic powder block passing through the second through hole and the accumulation amount of the magnetic powder on the conveying assembly; and

the controller is used for controlling the vibration dispersion mechanism to perform vibration screening on the neodymium iron boron magnetic powder blocks input from the outside; the grinding mechanism is also used for controlling the grinding mechanism to grind the neodymium iron boron magnetic powder blocks subjected to vibration screening, and the air blower is controlled to blow air into the grinding area, so that the magnetic powder in the screen cylinder passes through the through holes and is collected in the recovery shell; the electromagnetic valve is also used for starting the electromagnet once every other preset time I, so that the magnetic powder of the recovery shell is adsorbed on the inner wall of the recovery shell by the magnetism generated by the electromagnet, and the electromagnet is closed when the working time of the electromagnet reaches a preset time II; the roller group is also used for controlling the roller group to further roll the neodymium iron boron magnetic powder blocks rolled down from the second screen; the device is also used for adjusting the transmission power of the transmission component according to the accumulation amount and referring to a data corresponding relation of a preset accumulation amount-transmission power comparison table, and the accumulation amount and the transmission power have a one-to-one corresponding data corresponding relation in the accumulation amount-transmission power comparison table; and the rolling power control device is also used for adjusting the rolling power of the roller set according to the throughput and referring to a data corresponding relation of a preset throughput-rolling power comparison table, wherein the one-to-one data corresponding relation exists between the throughput and the rolling power in the throughput-rolling power comparison table.

As a further improvement of the scheme, the automatic crushing device for the neodymium iron boron magnetic powder blocks comprises a dispersing cylinder, a first screen and a vibration source; the first screen is arranged in the dispersing cylinder and is used for screening the neodymium iron boron magnetic powder blocks input from the outside; the vibration source is arranged on the dispersing cylinder and is used for vibrating the first screen.

Preferably, the controller is configured to adjust the vibration power of the vibration source according to the specific gravity of the bulk powder mass in the unit volume of the neodymium-iron-boron magnetic powder block, and with reference to a preset specific gravity-vibration power correspondence in the data correspondence table; and the proportion and the vibration power have a one-to-one corresponding data corresponding relation in the proportion-vibration power comparison table.

As a further improvement of the above solution, the mincing mechanism comprises a mincing rod and a rotating assembly; the twisting rod is positioned below the vibration dispersion mechanism; the rotating assembly is installed in the vibration dispersing mechanism and is used for driving the twisting rod to rotate so as to enable the twisting rod to rub the neodymium iron boron magnetic powder blocks falling from the vibration dispersing mechanism; the screen cylinder surrounds the twisted rod.

Further, the controller is also used for adjusting the rotating speed of the rotating assembly according to the specific gravity of the blocky powder lumps in the neodymium iron boron magnetic powder blocks in unit volume and by referring to a data corresponding relation in a preset specific gravity-rotating speed comparison table, and the specific gravity and the rotating speed have a one-to-one corresponding data corresponding relation in the specific gravity-rotating speed comparison table.

As a further improvement of the above scheme, the detection mechanism comprises a distance measuring sensor and a weighing sensor; the distance measuring sensor is arranged in the second through hole and is fixed on the collecting barrel; the distance measuring sensor is used for detecting the thickness of the neodymium iron boron magnetic powder block on the second screen mesh and taking the thickness as the throughput transmitted to the controller; the weighing sensor is used for detecting the weight of magnetic powder on the conveying assembly and taking the weight as the accumulation amount transmitted to the controller.

As a further improvement of the above aspect, the automatic crushing apparatus further includes:

the conveying mechanism is used for conveying the neodymium iron boron magnetic powder blocks rolled out from the first outlet to the first screen; and the controller drives the conveying mechanism to convey the neodymium iron boron magnetic powder blocks once every preset time.

Furthermore, the conveying mechanism comprises a lifting barrel, a lifting assembly, an electromagnetic adsorption block, a material transferring assembly and a feeding assembly; the lifting barrel is positioned at one side of the crushing shell and receives the neodymium iron boron magnetic powder block rolled out from the first outlet; a discharge port is formed in the side wall of the lifting barrel, and the height of the discharge port is higher than that of the dispersing barrel; the lifting assembly is arranged on the lifting barrel and is used for driving the electromagnetic adsorption block to lift; the electromagnetic adsorption block is positioned in the lifting barrel, slides up and down along a vertical sliding groove formed in the side wall of the lifting barrel, and adsorbs the neodymium iron boron magnetic powder block positioned in the lifting barrel through produced magnetism; the material transferring assembly is arranged on the lifting barrel and is used for transferring the neodymium iron boron magnetic powder blocks adsorbed by the electromagnetic adsorption blocks to the feeding assembly through the discharge port; the feeding assembly is used for conveying the received neodymium iron boron magnetic powder blocks to the first screen.

Still further, the lifting assembly comprises a lifting motor, at least one positioning rod, a threaded rod and a lifting platform; the lifting motor is arranged outside the lifting barrel, and the rotating shaft is arranged in parallel with the rotating shaft of the twisting rod; the positioning rod penetrates through the lifting platform, is fixed outside the lifting barrel and is arranged in parallel with the threaded rod; the bottom end of the threaded rod penetrates through the lifting platform and is connected to an output shaft of the lifting motor; the electromagnetic adsorption block penetrates through the chute and is fixed on the lifting platform;

the material transferring component comprises a material transferring motor, a material transferring hopper and a material transferring valve; the material transferring motor is arranged on the lifting barrel, and the output shaft is positioned in the discharge hole; the material transferring hopper is provided with an installation column which is vertical to the discharging direction of the material transferring hopper, and the installation column is installed on an output shaft of the material transferring motor; the rotating hopper rotates to receive the neodymium iron boron magnetic powder blocks adsorbed on the electromagnetic adsorption blocks; the material transferring valve is arranged on the material transferring hopper and used for adjusting the discharging amount of the material from the material transferring hopper to the feeding assembly;

the feeding assembly comprises a sliding plate with a smooth upper surface; the sliding plate is obliquely arranged relative to the dispersing cylinder, one end of the sliding plate, which is obliquely downward, is positioned above the first screen mesh, and the other end of the sliding plate, which is obliquely upward, is positioned below the material transferring hopper;

wherein, the controller is used for at first starting the electromagnetic adsorption piece to drive elevator motor rotates, makes the threaded rod rotate and rises to one in order to make the elevating platform predetermine the height, and then the drive changes the material motor and rotates, makes the below of changeing the hopper rotation in order to be located the electromagnetic adsorption piece, then closes the electromagnetic adsorption piece, makes the last adsorbed neodymium iron boron magnetic powder piece of electromagnetic adsorption piece fall to changeing in the hopper, then the drive changes the material motor and rotates, makes the rotatory top to the slide of changeing the hopper, makes the neodymium iron boron magnetic powder piece that is located to change in the hopper fall to the slide through changeing the material valve at last.

The invention also provides an automatic crushing method of the neodymium iron boron magnetic powder block, which is applied to the automatic crushing device of any neodymium iron boron magnetic powder block, and the automatic crushing method of the neodymium iron boron magnetic powder block comprises the following steps:

(a) controlling the vibration dispersion mechanism to perform vibration screening on the externally input neodymium iron boron magnetic powder blocks;

according to the specific gravity of the blocky powder lumps in the unit volume of the neodymium iron boron magnetic powder blocks, adjusting the vibration power of the vibration dispersing mechanism according to a preset specific gravity-vibration power comparison table according to the data corresponding relation, and adjusting the rotating speed of the mincing mechanism according to a preset specific gravity-rotating speed comparison table according to the data corresponding relation;

(b) controlling the mincing mechanism to mince the neodymium iron boron magnetic powder blocks after the vibrating sieving, and simultaneously controlling a blower to blow air into the minced area, so that the magnetic powder in the sieve cylinder passes through the through holes and is collected in the recovery shell;

(c) controlling the detection mechanism to detect the throughput of the neodymium iron boron magnetic powder block passing through the second perforation and the accumulation amount of the magnetic powder on the conveying assembly;

(d) controlling the roller group to further roll the neodymium iron boron magnetic powder blocks rolled off from the second screen;

according to the throughput, the rolling power of the roller set is adjusted by referring to a data corresponding relation of a preset throughput-rolling power comparison table; the corresponding data relation between the throughput and the rolling power exists in a one-to-one correspondence in the comparison table of the throughput and the rolling power;

(e) adjusting the transmission power of the transmission component according to the accumulation amount and by referring to a preset data corresponding relation of an accumulation amount-transmission power comparison table; the accumulation amount and the transmission power have a one-to-one corresponding data correspondence in the accumulation amount-transmission power comparison table.

The invention carries out vibration screening on neodymium iron boron magnetic powder blocks through the vibration dispersion mechanism to realize pre-screening, rubs the neodymium iron boron magnetic powder blocks after the vibration screening through the rubbing mechanism, so that large powder lumps can be knocked away by a rubbing rod to form small powder lumps and magnetic powder, simultaneously, the air blowing recovery mechanism blows the magnetic powder to the recovery shell to recover, the small powder lumps and partial magnetic powder can fall onto the second screen mesh to carry out further screening, the small powder lumps can roll down into the crushing shell from the second screen mesh, the magnetic powder directly falls into the collection barrel, then, the small powder lumps can be further cracked under the rolling of the roller set, meanwhile, a plurality of larger magnetic blocks can be crushed, thus the formed magnetic powder can directly fall onto the conveying assembly from the third screen mesh and further conveyed into the collection barrel, and the powder lumps which fall onto the first outlet from the third screen mesh can be conveyed into the vibration dispersion mechanism again to be crushed, the technical problems that the screening efficiency and the crushing efficiency of an existing neodymium iron boron magnetic powder block screening device or an existing neodymium iron boron magnetic block crushing device are not high are solved, meanwhile, the detection mechanism can detect the number of neodymium iron boron magnetic powder blocks entering a crushing shell, and simultaneously detect the accumulation amount of generated magnetic powder, so that the controller adjusts rolling power and transmission power according to the information, adjusts the power of a vibration source, and achieves the technical effects of improving the screening efficiency and improving the energy utilization rate.

Compared with the existing neodymium iron boron magnetic powder block screening device or neodymium iron boron magnetic block crushing device, the automatic crushing device for neodymium iron boron magnetic powder blocks has the following beneficial effects:

1. this automatic reducing mechanism of neodymium iron boron magnetism powder piece, it carries out vibration screening to neodymium iron boron magnetism powder piece through vibration dispersion mechanism, realize pre-screening, can prevent very big impurity and powder group to get into and influence subsequent smashing on the one hand like this, on the other hand can shake very big powder group and smash, will form relatively big powder group like this, then rub the neodymium iron boron magnetism powder piece after the vibration screening through rubbing the mechanism, big powder group can be knocked off by the drift rod like this and rub with the magnetic, further become little powder group and magnetic. Meanwhile, the air blower of the air blowing recovery mechanism of the crushing device blows magnetic powder to the recovery shell for recovery, small powder lumps and partial magnetic powder can fall onto the second screen mesh for further screening, the small powder lumps can roll down to the crushing shell from the second screen mesh, the falling magnetic powder directly falls into the collecting barrel, and then the small powder lumps can further break under the rolling of the roller set, and meanwhile, some large magnetic blocks can also be crushed.

2. This automatic reducing mechanism of neodymium iron boron magnetism powder piece, its detection mechanism can detect the throughput of passing through the two neodymium iron boron magnetism powder pieces of perforation, and the controller adjusts the power of roller set according to the throughput like this, for example can suitably reduce the roll-in power when the throughput is less, and then increase the roll-in power when the throughput is great, then stop the roll-in when the throughput, can improve the energy utilization of roller set like this, can also prolong the life of roller set. This automatic reducing mechanism's detection mechanism can also detect the magnetic deposit volume that is located on the conveying subassembly, and the controller can adjust conveying efficiency according to the deposit volume like this, for example can reduce transmission power when the deposit volume is less, slows down the conveying promptly, then accelerates the conveying on the contrary, under the prerequisite of the timely conveying of guaranteeing the magnetic, improves the utilization ratio of the energy of conveying. The controller also adjusts the vibration power of the vibration source according to the specific gravity of the massive powder lumps, for example, the vibration power can be increased when the specific gravity is larger, so that the amplitude and the vibration frequency of the first screen mesh are increased, and the vibration power is reduced when the specific gravity is smaller, so that the waste of vibration energy is avoided.

3. This automatic reducing mechanism of neodymium iron boron magnetism powder piece, its blast air is retrieved the mechanism and still can be set up the electro-magnet, the electro-magnet can produce the magnetic field effect to the magnetic of retrieving in the casing, make the magnetic adsorb on the inner wall of retrieving the casing, the controller just can pass through the control electro-magnet like this, make these absorbent magnetic fall after reaching a certain amount, thereby accelerate to collect the magnetic, avoid partial magnetic to flow back to a dispersion section of thick bamboo in, and can also produce the appeal to the magnetic in the dispersion section of thick bamboo, accelerate the speed that the magnetic got into the recovery casing.

4. The automatic crushing device for the neodymium iron boron magnetic powder blocks is further provided with a conveying mechanism, a controller can start an electromagnetic adsorption block to adsorb the powder balls entering a lifting barrel firstly, drive a lifting motor to rotate, enable a threaded rod to rotate and enable a lifting platform to ascend to a preset height, drive a material rotating motor to rotate secondly, enable a material rotating hopper to rotate till the position below the electromagnetic adsorption block, then close the electromagnetic adsorption block, enable the adsorbed powder balls to fall into the material rotating hopper under the action of gravity, then drive the material rotating motor to rotate again, enable the material rotating hopper to rotate till the position above a sliding plate, finally open a material rotating valve, enable the powder balls in the material rotating hopper to fall onto the sliding plate and further slide onto a screen mesh to perform vibration screening again, thereby realizing repeated screening and crushing of the neodymium iron boron magnetic powder blocks, and the neodymium iron boron magnetic powder blocks can be crushed by multiple wheels, thereby becoming magnetic powder. The process is smashed in repeated screening like this, can improve neodymium iron boron magnetic powder piece crushing effect, improves the utilization ratio to magnetic material, can realize full automatic cycle moreover, need not manual operation, further improves crushing efficiency, alleviates artifical intensity of labour simultaneously, avoids the dust to cause the health hazard to the people.

5. The beneficial effects of the method for automatically crushing the neodymium iron boron magnetic powder block are the same as those of the device for automatically crushing the neodymium iron boron magnetic powder block, and the detailed description is omitted here.

Drawings

Fig. 1 is a schematic structural diagram of an automatic neodymium iron boron magnetic powder block crushing device in embodiment 1 of the invention;

fig. 2 is a schematic structural diagram of an automatic neodymium iron boron magnetic powder block crushing device in embodiment 2 of the invention;

fig. 3 is a schematic structural diagram of an automatic neodymium iron boron magnetic powder block crushing device in embodiment 3 of the invention when an electromagnetic adsorption block is not lifted;

FIG. 4 is an enlarged view of area A of FIG. 3;

FIG. 5 is an enlarged view of area B of FIG. 3;

fig. 6 is a schematic structural diagram of the automatic neodymium iron boron magnetic powder block crushing device according to embodiment 3 of the present invention when the electromagnetic adsorption block rises to a preset height;

FIG. 7 is an enlarged view of area C of FIG. 6;

fig. 8 is a flowchart of an automatic pulverizing method of neodymium iron boron magnetic powder blocks according to embodiment 4 of the present invention.

Description of the symbols:

1 dispersing cylinder 21 lifting motor

2 screen 22 locating rod

3 vibration source 23 threaded rod

4 24 elevating platforms of hank stick

5 air-blower 25 changes material motor

6 screen drum 26 rotating hopper

7 retrieve casing 27 commentaries on classics material valve

8 collecting barrel 28 mounting column

9 screen II 29 sliding plate

10-hole one 30-shield

11 two 31 rotating motor of perforation

12 crushing shell 32 hinge

13 roller set 33 hinge rod

14 mesh three 34 conveyor belt

15 outlet-35 damping ring

16 outlet two 36 discharge outlet

17 electromagnet 37 positioning plate

18 ranging sensor 38 baffle

19 lifting bucket 39 base

20 electromagnetic adsorption block 40 cover

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

Referring to fig. 1, the present invention provides an automatic pulverizing apparatus for neodymium iron boron magnetic powder blocks, which is used for sieving and pulverizing neodymium iron boron magnetic powder blocks formed by neodymium iron boron magnetic powder, so as to form magnetic powder in the same particle size range. The automatic crushing device for the neodymium iron boron magnetic powder blocks comprises a vibration dispersing mechanism, a rubbing mechanism, an air blowing recovery mechanism, a screening and collecting mechanism, a crushing mechanism, a detection mechanism and a controller.

The vibration dispersing mechanism comprises a dispersing cylinder 1, a screen cloth 2 and a vibration source 3. The first screen 2 is installed in the dispersing cylinder 1 and is used for screening the neodymium iron boron magnetic powder block input from the outside. The vibration source 3 is installed on the dispersing cylinder 1 and is used for vibrating the screen mesh I2. In this embodiment, the dispersing cylinder 1 is a cylinder, and both ends thereof are open. The dispersion cylinder 1 may be horn-shaped or funnel-shaped, and of course, other shapes such as column-shaped may be selected according to actual needs. The inner wall of the dispersing cylinder 1 can be laid with wear-resistant materials, and the dispersing cylinder 1 can be made of non-magnetic materials, so that magnetic powder is prevented from being adsorbed on the inner wall of the dispersing cylinder. The first screen 2 may be fixed to an inner wall of the dispersing cylinder 1 and spaced apart from an opening of the dispersing cylinder 1. Similarly, the first screen 2 may need to be made of a non-magnetic material, such as plastic, and may be made of the same material as the material of the dispersing cylinder 1, or may even be directly formed integrally with the dispersing cylinder 1. Of course, in some embodiments, the first screen 2 may be detachably connected to the dispersing cylinder 1, so as to facilitate subsequent replacement of the first screen 2 or maintenance cleaning of the first screen 2. The vibration source 3 may be a vibration motor, which may be installed on the outer wall of the dispersing cylinder 1, or may be embedded in the dispersing cylinder 1. In this embodiment, in order to prevent the vibration source 3 from affecting other structures, a damping ring 35 may be installed on the bottom end of the dispersing cylinder 1 to reduce the influence of vibration on the lower structure. Like this, carry out vibration screening to neodymium iron boron magnetism powder piece through vibration dispersion mechanism, realize prescreening, can prevent on the one hand that very big impurity and powder ball from getting into and influencing subsequent smashing, on the other hand can shake garrulous with very big powder ball.

The mincing mechanism comprises a mincing rod 4 and a rotating component. The twisting rod 4 is positioned below the dispersing cylinder 1 and is arranged coaxially with the dispersing cylinder 1. The rotating assembly is installed in the dispersing cylinder 1 and is used for driving the hinge rod 4 to rotate so as to grind the neodymium iron boron magnetic powder blocks falling from the screen mesh I2. In the present embodiment, the rotation assembly includes a shield 30 and a rotation motor 31. The shield 30 is fixed in the dispersing cylinder 1. The rotating motor 31 is located in the guard cover 30, and the output shaft protrudes outside the guard cover 30. The hinge rod 4 comprises a hinge shaft 32 and a plurality of hinge rods 33. The top end of the hinge shaft 32 is connected to the output shaft of the rotating motor 31, and the bottom end is rotatably mounted on the base 39. The plurality of hinge rods 33 are mounted on the hinge shaft 32 and are arranged in a staggered manner. After the neodymium iron boron magnetic powder block vibrates in the screen mesh I2, a part of relatively large powder mass can directly enter the area where the twisting rod 4 is located, so that the rotating motor 31 rotates to drive the twisting shaft 32 to rotate, the twisting rod 33 can impact and knock the large powder mass to rub the large powder mass, and the large powder mass can further become small powder masses and magnetic powder.

The air blast recovery mechanism includes an air blast 5, a screen drum 6, and a recovery case 7. The screen cylinder 6 is installed on the bottom end of the dispersing cylinder 1 and surrounds the hinge rod 4, and the base 39 is fixed on the inner wall of the screen cylinder 6. Air-blower 5 and recovery casing 7 are located the relative both sides of a sieve section of thick bamboo 6, and a plurality of through-holes are all seted up to two lateral walls that a sieve section of thick bamboo 6 is close to air-blower 5 and recovery casing 7. The blower 5 is used for blowing air to the inside of the screen drum 6, so that the magnetic powder in the screen drum 6 passes through the through holes and is collected in the recovery casing 7. In this embodiment, the sieve cylinder 6 and the recovery casing 7 are made of non-magnetic materials, so as to prevent the magnetic materials from being directly adsorbed on the inner wall. The blower 5 can be selected according to actual needs, and the selection standard is generated according to the particle size of magnetic powder, so that the magnetic material with larger particle size cannot block the through hole under the action of wind force.

The screening and collecting mechanism comprises a collecting barrel 8 and a second screen 9. The collecting bucket 8 is installed on the bottom end of the screen drum 6 and is used for collecting neodymium iron boron magnetic powder blocks falling from the screen drum 6. The side wall of the collecting barrel 8 is provided with a first perforation 10 and a second perforation 11. The bottom end of the recovery shell 7 is communicated with the collecting barrel 8 through a perforation hole 10. The number of the second screen 9 is at least one layer, the second screen 9 is obliquely arranged in the collecting barrel 8, one end which is obliquely upward is positioned above the first perforation hole 10, and the other end which is obliquely downward penetrates through the second perforation hole 11. One end of the second screen 9, which inclines upwards, is inserted into the collecting barrel 8, and a hemispherical cover body 40 is arranged at the joint. In this embodiment, the collection barrel 8 and the second screen 9 are made of non-magnetic materials, and the surfaces thereof may be coated with wear-resistant materials.

The crushing mechanism comprises a crushing shell 12, a roller set 13, at least one layer of screen mesh three 14 and a conveying assembly. The crushing shell 12 is positioned on one side of the collecting barrel 8, at least one first outlet 15 corresponding to at least one layer of screen mesh three 14 is arranged on the side wall far away from the second perforated hole 11, and a second outlet 16 is arranged on the side wall close to the second perforated hole 11. The end of the second screen 9 which is inclined downwards is positioned in the crushing shell 12. The roller set 13 is installed in the pulverizing casing 12 and is used for rolling the neodymium iron boron magnetic powder block rolled down from the second screen 9. The third screen 14 is obliquely arranged on the crushing shell 12, and one end obliquely downwards is clamped in the corresponding first outlet 15. The transfer assembly is installed in the pulverizing casing 12 below the mesh third 14, and serves to transfer the magnetic powder falling from the mesh third 14 from the outlet second 16 into the collection tub 8. Wherein, the aperture of the third screen 14 and the second screen 9 is the same and smaller than the aperture of the first screen 2.

In this embodiment, the pulverizing casing 12, the roller set 13 and the screen cloth 14 are made of non-magnetic material, and the surface of the conveying assembly is also made of non-magnetic material. It should be noted that, in the present embodiment, in order to save materials, the dispersing cylinder 1, the screen cylinder 6, the recovery casing 7, the collecting tub 8, and the pulverizing casing 12 are integrally formed, and the same nonmagnetic material is used. The roller set 13 is provided with two rollers, the rollers are provided with even roller teeth, and the downward inclined end of the second screen mesh 9 is positioned above the two rollers in an inclined manner, so that the small powder lumps on the second screen mesh 9 can just fall between the two rollers under the action of inertia. For convenience of description, the number of the third screens 14 in the present embodiment is two, and the two third screens 14 are arranged in parallel. The conveyor assembly includes a conveyor belt 34, the conveyor belt 34 being disposed at an incline. The conveyor belt 34 has an inclined upward end adjacent to the first outlet 15 and an inclined downward end passing through the second outlet 16 and located in the collection tub 8.

The detection mechanism is used for detecting the throughput of the neodymium iron boron magnetic powder block passing through the second through hole 11 and the accumulation amount of the magnetic powder on the conveying assembly. In the present embodiment, the detection mechanism includes a distance measuring sensor 18 and a load cell. The distance measuring sensor 18 is installed in the second penetration hole 11 and fixed on the collection barrel 8. The distance measuring sensor 18 is used for detecting the thickness of the neodymium iron boron magnetic powder block on the second screen 9 and using the thickness as the throughput transmitted to the controller. The weighing sensor is used for detecting the weight of the magnetic powder on the conveying assembly and transmitting the weight to the controller as a stacking amount.

The controller is used for adjusting the vibration power of the vibration source 3 according to the specific gravity of the blocky powder mass in the unit volume of the neodymium iron boron magnetic powder block and according to a data corresponding relation in a preset specific gravity-vibration power comparison table, and adjusting the rotating speed of the rotating assembly according to a data corresponding relation in a preset specific gravity-rotating speed comparison table. The proportion and the vibration power have a one-to-one corresponding data corresponding relation in a proportion-vibration power comparison table, and the proportion and the rotating speed have a one-to-one corresponding data corresponding relation in a proportion-rotating speed comparison table. The controller is also used for adjusting the rolling power of the roller set 13 according to the passing amount and referring to a data corresponding relation of a preset passing amount-rolling power comparison table, and adjusting the transmission power of the transmission assembly according to the accumulation amount and referring to a data corresponding relation of a preset accumulation amount-transmission power comparison table. The corresponding data relation between the passing amount and the rolling power exists in a comparison table of the passing amount and the rolling power, and the corresponding data relation between the accumulation amount and the transmission power exists in a comparison table of the accumulation amount and the transmission power.

To sum up, compare in prior art, the automatic reducing mechanism of neodymium iron boron magnetic powder piece of this embodiment, it has following advantage:

1. this automatic reducing mechanism of neodymium iron boron magnetism powder piece, it carries out vibration screening to neodymium iron boron magnetism powder piece through vibration dispersion mechanism, realize pre-screening, can prevent very big impurity and powder group to get into and influence subsequent smashing on the one hand like this, on the other hand can shake very big powder group and smash, will form relatively big powder group like this, then rub the neodymium iron boron magnetism powder piece after the vibration screening through rubbing the mechanism, big powder group can be knocked off by the drift rod like this and rub with the magnetic, further become little powder group and magnetic. Meanwhile, the blower 5 of the air blowing recovery mechanism of the crushing device blows magnetic powder to the recovery shell 7 for recovery, small powder agglomerates and part of the magnetic powder can fall onto the second screen mesh 9 for further screening, the small powder agglomerates can roll from the second screen mesh 9 to the crushing shell 12, the falling magnetic powder directly falls into the collecting barrel 8, then the small powder agglomerates can be further cracked under the rolling of the roller set 13, meanwhile, some large magnetic blocks can be crushed, the formed magnetic powder can directly fall onto the conveying assembly from the third screen mesh 14 and is further conveyed to the collecting barrel 8, the powder agglomerates which fall onto the first outlet from the third screen mesh 14 can be conveyed to the vibration dispersion mechanism again for re-crushing, and therefore, the crushing and screening efficiency can be improved, and meanwhile, the utilization rate of magnetic materials can be improved.

2. According to the automatic crushing device for the neodymium iron boron magnetic powder block, the detection mechanism can detect the throughput of the neodymium iron boron magnetic powder block passing through the second through hole 11, so that the controller adjusts the power of the roller set 13 according to the throughput, for example, the rolling power can be properly reduced when the throughput is small, the rolling power is increased when the throughput is large, and the rolling is stopped when the throughput is large, so that the energy utilization rate of the roller set can be improved, and the service life of the roller set can be prolonged. This automatic reducing mechanism's detection mechanism can also detect the magnetic deposit volume that is located on the conveying subassembly, and the controller can adjust conveying efficiency according to the deposit volume like this, for example can reduce transmission power when the deposit volume is less, slows down the conveying promptly, then accelerates the conveying on the contrary, under the prerequisite of the timely conveying of guaranteeing the magnetic, improves the utilization ratio of the energy of conveying. The controller also adjusts the vibration power of the vibration source 3 according to the specific gravity of the lump powder, for example, the vibration power can be increased when the specific gravity is larger, so that the amplitude and the vibration frequency of the screen mesh I2 are increased, and the vibration power can be reduced when the specific gravity is smaller, so as to avoid the waste of vibration energy.

Example 2

Referring to fig. 2, the embodiment provides an automatic pulverizing device for neodymium iron boron magnetic powder blocks, which is added with an electromagnet 17 based on embodiment 1. The number of the electromagnets 17 is plural, and the electromagnets 17 belong to the air blast recovery mechanism. An electromagnet 17 is mounted on the outer wall of the recovery casing 7. The controller is also used for starting the electromagnet 17 once every other preset time, so that the magnetic powder of the recovery shell 7 is adsorbed on the inner wall of the recovery shell 7 by the magnetism generated by the electromagnet 17, and the electromagnet 17 is closed when the working time of the electromagnet 17 reaches a preset time two.

Consequently, the automatic reducing mechanism of neodymium iron boron magnetic powder piece that this embodiment provided, its blast air is retrieved mechanism electro-magnet 17 and can be to the magnetic production magnetic field effect in retrieving casing 7, make the magnetic adsorb on retrieving the inner wall of casing 7, the controller just can be through control electro-magnet 17 like this, make these adsorbed magnetic fall after reaching a certain amount, thereby accelerate to converge the magnetic, avoid partial magnetic to flow back to a dispersion section of thick bamboo 1 in, and can also produce the appeal to the magnetic in a dispersion section of thick bamboo 1, accelerate the magnetic entering speed of retrieving casing 7.

Example 3

Referring to fig. 3-7, the present embodiment provides an automatic pulverizing apparatus for neodymium iron boron magnetic powder blocks, which is added with a conveying mechanism based on embodiment 1. The conveying mechanism is used for conveying the neodymium iron boron magnetic powder blocks rolled out from the first outlet 15 to the first screen 2. Wherein, the controller drives the conveying mechanism to convey the neodymium iron boron magnetic powder blocks once every three preset times.

The conveying mechanism in this embodiment includes a lifting bucket 19, a lifting assembly, an electromagnetic adsorption block 20, a material transferring assembly and a feeding assembly. The lifting tub 19 is located at one side of the pulverizing casing 12 and receives the nd-fe-b magnetic powder lumps rolled out from the outlet one 15. The side wall of the lifting barrel 19 is provided with a discharge port 36, and the height of the discharge port 36 is higher than that of the dispersion barrel 1. The lifting assembly is installed on the lifting bucket 19 and is used for driving the electromagnetic adsorption block 20 to lift. The electromagnetic adsorption block 20 is located in the lifting bucket 19, and slides up and down along a vertical sliding groove formed in the side wall of the lifting bucket 19, and adsorbs the neodymium iron boron magnetic powder block located in the lifting bucket 19 through the produced magnetism. The material transferring component is arranged on the lifting barrel 19 and is used for transferring the neodymium iron boron magnetic powder blocks adsorbed by the electromagnetic adsorption blocks 20 to the feeding component through the discharge hole 36. The feeding assembly is used for conveying the received neodymium iron boron magnetic powder blocks to the first screen 2.

In some embodiments (including the present embodiment), the lifting assembly includes a lifting motor 21, at least one positioning rod 22, a threaded rod 23, a lifting platform 24, and may further include a positioning plate 37. The lifting motor 21 is installed outside the lifting barrel 19, and the rotating shaft thereof is arranged in parallel with the rotating shaft of the twisting rod 4. The positioning rod 22 passes through the lifting platform 24, is fixed outside the lifting barrel 19 through a positioning plate 37, and is arranged in parallel with the threaded rod 23. The bottom end of the threaded rod 23 passes through the lifting platform 24 and is connected to the output shaft of the lifting motor 21. The positioning plate 37 is fixed on the outer wall of the lifting barrel 19, and the end part of the output shaft of the lifting motor 21 penetrates through the positioning plate 37 and then is connected with the threaded rod 23. The electromagnetic adsorption block 20 passes through the chute and is fixed on the lifting platform 24. In order to prevent the small powder lumps from obstructing the ascending and descending of the electromagnetic adsorption block 20, a baffle 38 is provided in the ascending and descending bucket 19.

Furthermore, the material transferring assembly comprises a material transferring motor 25, a material transferring hopper 26 and a material transferring valve 27. The material transferring motor 25 is installed on the lifting barrel 19, and the output shaft is located in the discharge hole 36. The material transferring hopper 26 is provided with a mounting column 28 perpendicular to the discharging direction thereof, and the mounting column 28 is mounted on the output shaft of the material transferring motor 25. The rotary hopper 26 rotates to receive the neodymium iron boron magnetic powder blocks adsorbed on the electromagnetic adsorption blocks 20. The transfer valve 27 is mounted on the transfer hopper 26 and is used for adjusting the discharge amount of the transfer hopper 26 from the feeding assembly. The feed assembly includes a smooth-surfaced slide plate 29. The slide plate 29 is arranged obliquely relative to the dispersing cylinder 1, and one end of the slide plate facing obliquely downwards is positioned above the first screen 2, and one end of the slide plate facing obliquely upwards is positioned below the rotary hopper 26.

In order to realize the conveying control, the controller of the embodiment is configured to first start the electromagnetic adsorption block 20, and drive the lifting motor 21 to rotate, so that the threaded rod 23 rotates to enable the lifting platform 24 to ascend to a preset height, then drive the material transferring motor 25 to rotate, so that the material transferring hopper 26 rotates to be located below the electromagnetic adsorption block 20, then close the electromagnetic adsorption block 20, so that the neodymium iron boron magnetic powder blocks adsorbed on the electromagnetic adsorption block 20 fall into the material transferring hopper 26, then drive the material transferring motor 25 to rotate, so that the material transferring hopper 26 rotates to be located above the sliding plate 29, and finally enable the neodymium iron boron magnetic powder blocks located in the material transferring hopper 26 to fall onto the sliding plate 29 through the material transferring valve 27.

This automatic reducing mechanism of neodymium iron boron magnetism powder piece, its conveying mechanism who sets up can be convenient for the controller and control. Specifically, the controller may first start the electromagnetic absorption block to absorb the powder dough entering the lifting barrel 19, and drives the lifting motor 21 to rotate, so that the threaded rod 23 rotates and the lifting platform 24 is driven to ascend to a preset height, and then the material transferring motor 25 is driven to rotate, so that the material transferring hopper 26 rotates until being positioned below the electromagnetic absorption block 20, then the electromagnetic absorption block 20 is closed, at this time, the absorbed powder mass falls into the rotary hopper 26 under the action of gravity, then the material transferring motor 25 is driven to rotate again, the material transferring hopper 26 is rotated until the material transferring hopper is positioned above the sliding plate 29, finally the material transferring valve 27 is opened, the powder mass in the material transferring hopper 26 falls onto the sliding plate 29 and further slides onto the first screen 2 for vibrating screening again, thereby realize the repeated screening of neodymium iron boron magnetism powder piece and smash, neodymium iron boron magnetism powder piece will be smashed by the multiple round like this, and then becomes the magnetic. The process is smashed in repeated screening like this, can improve neodymium iron boron magnetic powder piece crushing effect, improves the utilization ratio to magnetic material, can realize full automatic cycle moreover, need not manual operation, further improves crushing efficiency, alleviates artifical intensity of labour simultaneously, avoids the dust to cause the health hazard to the people.

Example 4

Referring to fig. 8, the present embodiment provides an automatic grinding method for neodymium iron boron magnetic powder blocks, which is applied to any one of the automatic grinding devices for neodymium iron boron magnetic powder blocks provided in embodiments 1 to 3, and the method includes the following steps:

(a) vibrating and screening the neodymium iron boron magnetic powder block input from the outside;

according to the specific gravity of the blocky powder mass in the unit volume of the neodymium iron boron magnetic powder block, the vibration power of the vibration source 3 is adjusted according to a data corresponding relation in a preset specific gravity-vibration power comparison table, and meanwhile, the rotating speed of the rotating assembly is adjusted according to a data corresponding relation in a preset specific gravity-rotating speed comparison table; the proportion and the vibration power have a one-to-one corresponding data corresponding relation in a proportion-vibration power comparison table, and the proportion and the rotating speed have a one-to-one corresponding data corresponding relation in a proportion-rotating speed comparison table;

(b) mincing the neodymium iron boron magnetic powder block after the vibration screening, and simultaneously blowing air into the minced region to ensure that the magnetic powder in the screen cylinder 6 passes through the through hole and is collected in the recovery shell 7;

(c) further screening the neodymium iron boron magnetic powder blocks falling from the screen drum 6, and detecting the throughput of the neodymium iron boron magnetic powder blocks passing through the second perforation 11;

according to the throughput, the rolling power of the roller set 13 is adjusted by referring to the data corresponding relation of a preset throughput-rolling power comparison table; the corresponding relationship of the throughput and the rolling power exists in a one-to-one corresponding data in a comparison table of the throughput and the rolling power;

(d) sequentially crushing and screening the coarse magnetic powder blocks separated in the step (c), and detecting the accumulation amount of the magnetic powder on the conveying assembly;

according to the accumulation amount, the transmission power of the transmission assembly is adjusted by referring to a data corresponding relation of a preset accumulation amount-transmission power comparison table; the accumulation amount and the transmission power have a one-to-one corresponding data corresponding relation in the accumulation amount-transmission power comparison table;

(e) collecting the magnetic powder collected in (b), the finer magnetic powder separated in (c), and the finer magnetic powder screened in (d) in a collecting barrel 8;

(f) returning the coarse magnetic powder blocks sieved in the step (d) to the step (a).

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides an automatic reducing mechanism of neodymium iron boron magnetic powder piece which characterized in that, it includes:

the vibration dispersion mechanism is used for screening the neodymium iron boron magnetic powder blocks input from the outside;

the grinding mechanism is used for grinding the neodymium iron boron magnetic powder blocks falling from the vibration dispersion mechanism;

the air blowing recovery mechanism comprises an air blower (5), a screen drum (6), a recovery shell (7) and a plurality of electromagnets (17); the screen cylinder (6) is arranged at the bottom end of the vibration dispersion mechanism and surrounds the mincing mechanism; the air blower (5) and the recovery shell (7) are positioned on two opposite sides of the screen drum (6), and a plurality of through holes are formed in two side walls, close to the air blower (5) and the recovery shell (7), of the screen drum (6); the blower (5) is used for blowing air to the inside of the screen cylinder (6) so that the magnetic powder which is positioned in the screen cylinder (6) and is ground by the grinding mechanism passes through the through holes and is collected in the recovery shell (7); the electromagnet (17) is arranged on the outer wall of the recovery shell (7);

the screening and collecting mechanism comprises a collecting barrel (8) and at least one layer of second screen (9); the collecting barrel (8) is arranged at the bottom end of the screen drum (6) and is used for collecting neodymium iron boron magnetic powder blocks falling from the screen drum (6); a first perforation (10) and a second perforation (11) are formed on the side wall of the collecting barrel (8); the bottom end of the recovery shell (7) is communicated with the collecting barrel (8) through a first perforation (10); the second screen (9) is obliquely arranged in the collecting barrel (8), one end which is obliquely upward is positioned above the first through hole (10), and the other end which is obliquely downward passes through the second through hole (11);

the crushing mechanism comprises a crushing shell (12), a roller set (13), at least one layer of screen mesh III (14) and a conveying assembly; the crushing shell (12) is positioned on one side of the collecting barrel (8), at least one first outlet (15) corresponding to at least one layer of screen mesh three (14) is formed in the side wall far away from the second perforated hole (11), and a second outlet (16) is formed in the side wall close to the second perforated hole (11); one end of the second screen (9) which is inclined downwards is positioned in the crushing shell (12); the roller set (13) is arranged in the crushing shell (12) and is used for rolling the neodymium iron boron magnetic powder blocks rolled down from the second screen mesh (9); the third screen (14) is obliquely arranged on the crushing shell (12), and one end of the third screen, which is obliquely downward, is clamped in the corresponding first outlet (15); the conveying assembly is installed in the crushing shell (12) and is positioned below the third screen mesh (14) and used for conveying the magnetic powder falling from the third screen mesh (14) into the collecting barrel (8) from the second outlet (16); the apertures of the third screen (14) and the second screen (9) are the same and smaller than the screening aperture of the vibration dispersion mechanism;

the detection mechanism is used for detecting the passing amount of the neodymium iron boron magnetic powder block passing through the second perforation (11) and the accumulation amount of the magnetic powder on the conveying assembly; and

the controller is used for controlling the vibration dispersion mechanism to perform vibration screening on the neodymium iron boron magnetic powder blocks input from the outside; the grinding mechanism is also used for controlling the grinding mechanism to grind the neodymium iron boron magnetic powder blocks after the vibrating screening, and the blower (5) is controlled to blow air to the ground area, so that the magnetic powder in the screen cylinder (6) passes through the through holes and is collected in the recovery shell (7); the magnetic powder recovery device is also used for starting the electromagnet (17) once every other preset time, so that the magnetic powder of the recovery shell (7) is adsorbed on the inner wall of the recovery shell (7) by the magnetism generated by the electromagnet (17), and the electromagnet (17) is closed when the working time of the electromagnet (17) reaches a preset time two; the roller set (13) is also used for controlling the roller set to further roll the neodymium iron boron magnetic powder block rolled down from the second screen (9); the device is also used for adjusting the transmission power of the transmission component according to the accumulation amount and referring to a data corresponding relation of a preset accumulation amount-transmission power comparison table, and the accumulation amount and the transmission power have a one-to-one corresponding data corresponding relation in the accumulation amount-transmission power comparison table; and the device is also used for adjusting the rolling power of the roller set (13) according to the throughput by referring to the data corresponding relation of a preset throughput-rolling power comparison table, wherein the throughput and the rolling power have one-to-one corresponding data corresponding relation in the throughput-rolling power comparison table.

2. The automatic neodymium iron boron magnetic powder block crushing device according to claim 1, wherein the automatic neodymium iron boron magnetic powder block crushing device comprises a dispersing cylinder (1), a first screen (2) and a vibration source (3); the screen I (2) is arranged in the dispersing cylinder (1) and is used for screening the neodymium iron boron magnetic powder block input from the outside; the vibration source (3) is arranged on the dispersing cylinder (1) and is used for vibrating the screen I (2).

3. The ndfeb magnetic powder block automatic pulverization apparatus according to claim 2, characterized in that the controller is adapted to adjust the vibration power of the vibration source (3) according to the specific gravity of the lump powder in the unit volume of the ndfeb magnetic powder block with reference to a preset specific gravity-vibration power correspondence in the table; and the proportion and the vibration power have a one-to-one corresponding data corresponding relation in the proportion-vibration power comparison table.

4. The automatic pulverizing device of neodymium iron boron magnetic powder block of claim 1, characterized in that the mincing mechanism comprises a mincing bar (4) and a rotating component; the twisting rod (4) is positioned below the vibration dispersion mechanism; the rotating assembly is installed in the vibration dispersion mechanism and is used for driving the twisting rod (4) to rotate so as to enable the twisting rod (4) to rub the neodymium-iron-boron magnetic powder blocks falling from the vibration dispersion mechanism; the screen cylinder (6) surrounds the hinge rod (4).

5. The apparatus of claim 4, wherein the controller is further configured to adjust the rotation speed of the rotating assembly according to a specific gravity of the lump of powder in each unit volume of the ndfeb magnetic powder, with reference to a preset specific gravity-rotation speed map, in which there is a one-to-one data correspondence between the specific gravity and the rotation speed.

6. The automatic neodymium iron boron magnetic powder block crushing device according to claim 1, wherein the detection mechanism comprises a distance measuring sensor (18) and a weighing sensor; the distance measuring sensor (18) is arranged in the second through hole (11) and is fixed on the collecting barrel (8); the distance measuring sensor (18) is used for detecting the thickness of the neodymium iron boron magnetic powder block on the second screen (9) and taking the thickness as the throughput transmitted to the controller; the weighing sensor is used for detecting the weight of magnetic powder on the conveying assembly and taking the weight as the accumulation amount transmitted to the controller.

7. The automatic pulverizing apparatus of neodymium iron boron magnetic powder block of claim 1, characterized in that the automatic pulverizing apparatus further comprises:

the conveying mechanism is used for conveying the neodymium iron boron magnetic powder blocks rolled out from the first outlet (15) to the first screen (2); and the controller drives the conveying mechanism to convey the neodymium iron boron magnetic powder blocks once every preset time.

8. The automatic neodymium iron boron magnetic powder block crushing device according to claim 7, wherein the conveying mechanism comprises a lifting barrel (19), a lifting assembly, an electromagnetic adsorption block (20), a material transferring assembly and a feeding assembly; the lifting barrel (19) is positioned at one side of the crushing shell (12) and receives the neodymium iron boron magnetic powder blocks rolled out from the first outlet (15); a discharge port (36) is formed in the side wall of the lifting barrel (19), and the height of the discharge port (36) is higher than that of the dispersion barrel (1); the lifting component is arranged on the lifting barrel (19) and is used for driving the electromagnetic adsorption block (20) to lift; the electromagnetic adsorption block (20) is positioned in the lifting barrel (19), slides up and down along a vertical chute arranged on the side wall of the lifting barrel (19), and adsorbs the neodymium iron boron magnetic powder block positioned in the lifting barrel (19) through produced magnetism; the material transferring component is arranged on the lifting barrel (19) and is used for transferring the neodymium iron boron magnetic powder blocks adsorbed by the electromagnetic adsorption blocks (20) to the feeding component through the discharge hole (36); the feeding assembly is used for conveying the received neodymium iron boron magnetic powder blocks to the first screen (2).

9. The automatic pulverizing device of neodymium iron boron magnetic powder block of claim 8, characterized in that the lifting component comprises a lifting motor (21), at least one positioning rod (22), a threaded rod (23), a lifting platform (24); the lifting motor (21) is arranged outside the lifting barrel (19), and the rotating shaft is arranged in parallel with the rotating shaft of the twisting rod (4); the positioning rod (22) penetrates through the lifting platform (24), is fixed outside the lifting barrel (19), and is arranged in parallel with the threaded rod (23); the bottom end of the threaded rod (23) penetrates through the lifting platform (24) and is connected to an output shaft of the lifting motor (21); the electromagnetic adsorption block (20) penetrates through the sliding groove and is fixed on the lifting platform (24);

the material transferring component comprises a material transferring motor (25), a material transferring hopper (26) and a material transferring valve (27); the material transferring motor (25) is arranged on the lifting barrel (19), and an output shaft is positioned in the discharge hole (36); the material transferring hopper (26) is provided with an installation column (28) vertical to the discharging direction of the material transferring hopper, and the installation column (28) is installed on the output shaft of the material transferring motor (25); the material transferring hopper (26) is rotated to receive the neodymium iron boron magnetic powder blocks adsorbed on the electromagnetic adsorption blocks (20); the material transferring valve (27) is arranged on the material transferring hopper (26) and is used for adjusting the discharging amount of the material from the material transferring hopper (26) to the feeding assembly;

the feeding assembly comprises a sliding plate (29) with a smooth upper surface; the sliding plate (29) is obliquely arranged relative to the dispersing cylinder (1), one end of the sliding plate, which is obliquely downward, is positioned above the screen I (2), and the other end of the sliding plate, which is obliquely upward, is positioned below the material rotating hopper (26);

the controller is used for firstly starting the electromagnetic adsorption block (20), driving the lifting motor (21) to rotate, enabling the threaded rod (23) to rotate to enable the lifting platform (24) to ascend to a preset height, secondly driving the material transferring motor (25) to rotate, enabling the material transferring hopper (26) to rotate to be located below the electromagnetic adsorption block (20), then closing the electromagnetic adsorption block (20), enabling the neodymium iron boron magnetic powder blocks adsorbed on the electromagnetic adsorption block (20) to fall into the material transferring hopper (26), then driving the material transferring motor (25) to rotate, enabling the material transferring hopper (26) to rotate to be located above the sliding plate (29), and finally enabling the neodymium iron boron magnetic powder blocks located in the material transferring hopper (26) to fall onto the sliding plate (29) through the material transferring valve (27).

10. An automatic crushing method for neodymium iron boron magnetic powder blocks, which is applied to the automatic crushing device for neodymium iron boron magnetic powder blocks as claimed in any one of claims 1 to 9, is characterized by comprising the following steps:

(a) controlling the vibration dispersion mechanism to perform vibration screening on the externally input neodymium iron boron magnetic powder blocks;

according to the specific gravity of the blocky powder lumps in the unit volume of the neodymium iron boron magnetic powder blocks, adjusting the vibration power of the vibration dispersing mechanism according to a preset specific gravity-vibration power comparison table according to the data corresponding relation, and adjusting the rotating speed of the mincing mechanism according to a preset specific gravity-rotating speed comparison table according to the data corresponding relation;

(b) controlling the mincing mechanism to mince the neodymium iron boron magnetic powder blocks after the vibrating sieving, and simultaneously controlling a blower (5) to blow air into the minced area, so that the magnetic powder in the sieve cylinder (6) passes through the through holes and is collected in the recovery shell (7);

(c) controlling the detection mechanism to detect the passing amount of the neodymium iron boron magnetic powder block passing through the second perforation (11) and the accumulation amount of the magnetic powder on the conveying assembly;

(d) controlling a roller set (13) to further roll the neodymium iron boron magnetic powder blocks rolled down from the second screen (9);

according to the throughput, adjusting the rolling power of the roller set (13) by referring to a data corresponding relation of a preset throughput-rolling power comparison table; the corresponding data relation between the throughput and the rolling power exists in a one-to-one correspondence in the comparison table of the throughput and the rolling power;

(e) according to the accumulation amount, the transmission power of the transmission assembly is adjusted by referring to a data corresponding relation of a preset accumulation amount-transmission power comparison table; the accumulation amount and the transmission power have a one-to-one corresponding data correspondence in the accumulation amount-transmission power comparison table.

Images