CN114210420B - Preparation method of composite permanent magnet material - Google Patents
Preparation method of composite permanent magnet material Download PDFInfo
- Publication number
- CN114210420B CN114210420B CN202111649502.3A CN202111649502A CN114210420B CN 114210420 B CN114210420 B CN 114210420B CN 202111649502 A CN202111649502 A CN 202111649502A CN 114210420 B CN114210420 B CN 114210420B
- Authority
- CN
- China
- Prior art keywords
- roller
- cavity
- stud
- gear
- crushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000463 material Substances 0.000 title claims abstract description 54
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 69
- 239000010959 steel Substances 0.000 claims abstract description 69
- 239000000696 magnetic material Substances 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 26
- 238000000227 grinding Methods 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 238000011049 filling Methods 0.000 claims abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000011261 inert gas Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 61
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 60
- 229910002804 graphite Inorganic materials 0.000 claims description 52
- 239000010439 graphite Substances 0.000 claims description 52
- 229910052742 iron Inorganic materials 0.000 claims description 31
- 239000004576 sand Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 210000004209 hair Anatomy 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/005—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls the charge being turned over by magnetic forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
Abstract
The invention belongs to the technical field of permanent magnet materials, in particular to a preparation method of a composite permanent magnet material, which comprises the following steps: putting large-particle soft magnetic materials into a ball mill, starting a gear motor to drive a roller to rotate, grinding and crushing the soft magnetic materials by utilizing continuous collision and grinding of steel balls and the soft magnetic materials in the roller, supplying power to an electromagnet by a conductive rail to increase the lifting height of the steel balls, increasing the crushing efficiency, vacuumizing the roller after the diameter of powder particles after crushing is smaller than 0.5mm, adding rare earth elements Sm into the roller, and continuously grinding until the diameter of the powder particles is smaller than 0.05mm to obtain a mixture M; and (3) mixing the mixture M with a hard magnetic material, uniformly stirring to obtain a mixture N, filling the mixture N into a mold, carrying out pressurized high-temperature sintering under the protection of inert gas, and carrying out natural cooling after sintering, grinding and crushing to obtain the composite permanent magnetic material.
Description
Technical Field
The invention belongs to the technical field of permanent magnet materials, and particularly relates to a preparation method of a composite permanent magnet material.
Background
Compared with the traditional hard magnetic single-phase permanent magnet material, the isotropic nanocrystalline composite permanent magnet material composed of the soft magnetic phase and the hard magnetic phase has the advantages of low rare earth content, short preparation period, high magnetic consistency, near-net forming and the like, and has wide application in the fields of information industry and office automation at present.
One chinese patent with publication No. CN105632673B discloses a method for preparing nanocomposite permanent magnet material, respectively preparing powder a and powder B, wherein the main component of powder a is SmxFe (1-x-y) My, where M is selected from any one or more of Ti, V, mo and Co, x ranges from 40 to 50wt%, y ranges from 0 to 5wt%, and powder a is crystalline powder; the main component of the powder B is RM, wherein R is at least one rare earth element, M is at least one of Fe and Co, and the mass percentage of R in the powder B is 85-95%; mixing the powder A and the powder B to obtain mixed alloy powder, wherein the mass percentage of the powder B in the mixed alloy powder is 3-10wt%; and carrying out hot press deformation treatment on the mixed alloy powder until the permanent magnet material with anisotropic grains is formed.
In the prior art, after the steel ball inside is lifted to a high position by a rotating roller, the material to be ground is impacted, crushed and ground by falling of the steel ball, but the lifting height of the steel ball is limited, and when the height of the steel ball is increased by the lifting rotating speed, the material also rotates and rises along with the lifting of the rotating speed, so that the material cannot be fully hit when the steel ball falls, the crushing efficiency of the material is difficult to lift, and more time and energy are required to be consumed for grinding operation.
Therefore, the invention provides a preparation method of the composite permanent magnet material.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.
The technical scheme adopted for solving the technical problems is as follows: the preparation method of the composite permanent magnet material comprises the following steps:
s1, putting large-particle soft magnetic materials into a ball mill, starting a gear motor to drive a roller to rotate, grinding and crushing the soft magnetic materials by utilizing continuous collision and grinding of steel balls and the soft magnetic materials in the roller, supplying power to an electromagnet by a conductive rail to increase the lifting height of the steel balls, increasing the crushing efficiency, vacuumizing the roller after the diameter of powder particles after crushing is smaller than 0.5mm, adding rare earth elements Sm into the roller, and continuously grinding until the diameter of the powder particles is smaller than 0.05mm to obtain a mixture M;
s2, mixing the mixture M with a hard magnetic material, uniformly stirring to obtain a mixture N, filling the mixture N into a mold, carrying out high-temperature sintering under the protection of inert gas, naturally cooling after sintering, and grinding and crushing to obtain the composite permanent magnetic material;
the ball mill in S1 comprises a machine body and a roller, wherein the top of the machine body is rotationally connected with the roller, and a rotating shaft of the roller is driven to rotate by a gear motor; a group of inner liners are uniformly distributed on the inner circumference of the roller, and studs fixedly connected to one side of each inner liner penetrate through the roller and extend to the periphery of the roller; the screw bolt is connected with a nut in a threaded manner; the periphery of the roller is fixedly connected with a bracket at a position corresponding to the nut, the bracket and the rotating shaft are positioned on the same horizontal plane, two rows of arc-shaped conductive rails are arranged at the top of the bracket in an insulating manner, and the conductive rails are contacted with the end parts of the studs at the corresponding positions; the stud is in insulating sliding connection with the roller, and one end of the stud extending to the inner part of the lining is electrically connected with an electromagnet; a plurality of steel balls are filled in the roller; when the device is used, in the prior art, after the steel ball in the device is lifted to a high position by the rotating roller, the material to be ground is impacted, crushed and ground by falling of the steel ball, but the lifting height of the steel ball is limited, and when the lifting speed is used for improving the height of the steel ball, the material is also rotated and lifted along with the lifting of the rotating speed, so that the material cannot be fully hit when the steel ball falls, the crushing efficiency of the material is difficult to be improved, and more time and energy are required to be consumed for grinding operation; at the moment, the electric conduction rail is used for supplying power to the stud, so that the electromagnet at the corresponding position of the stud is electrified to attract the steel ball, the stud is separated from the electric conduction rail when the steel ball reaches the highest point of the roller along with the lining, at the moment, the electromagnet is powered off and loses attraction to the steel ball, the falling height difference of the steel ball is increased, the impact force of the steel ball on materials is further improved, and the grinding and crushing efficiency of the materials is further improved.
Preferably, a blind hole is formed in one end, close to the conductive rail, of the stud, a graphite column is connected in the blind hole in a sliding manner, one end of the graphite column is connected with the bottom of the blind hole through a spring, and the other end of the graphite column is of a hemispherical structure; through tip for hemispherical graphite post cooperation spring, increase the laminating degree of double-screw bolt and conductor rail, and then increase the circular telegram stability of electro-magnet, reduce unexpected outage and make the steel ball drop, increase the lifting efficiency of steel ball, reduce the wearing and tearing of conductor rail and double-screw bolt through removable graphite post simultaneously, increase of service life.
Preferably, the bottom of the blind hole is provided with a gas spraying hole which penetrates through the lining and is communicated with the inside of the roller; one end of the air injection hole, which is close to the rotating shaft, is provided with a one-way valve; the graphite column is in clearance fit with the blind hole, and the bottom of the graphite column is fixedly connected with a conical elastic sealing ring; when the graphite column is extruded by the conductive rail, the graphite column slides in the blind hole, so that compressed air generated in the blind hole is sprayed out into the roller through the air spraying hole, the inner lining surface of the material adhesion of the powder formed by partial crushing is further reduced, the loosening mixing stirring effect of the material is improved, the uniformity of the impact of the steel ball on the material is further improved, and the efficiency of sucking the graphite powder into the blind hole is improved by matching with the sealing ring during rebound of the graphite column.
Preferably, a first gear is arranged at the top of the roller and is rotationally connected with the machine body through a rotary pin and a support; the periphery of the roller is fixedly connected with a second gear at a position corresponding to the first gear, and the first gear is meshed with the second gear; the side face of the first gear is fixedly connected with a rotary table, a group of wedge-shaped grooves are uniformly distributed on the periphery of the rotary table, shaft sleeves are rotationally connected in the wedge-shaped grooves through pins, billiards are fixedly connected with the shaft sleeves through connecting rods, and the billiards are correspondingly arranged with the studs; the first gear and the turntable are driven to rotate through the second gear, so that the connecting rod is communicated with the billiard ball to rotate anticlockwise, and after the connecting rod is communicated with the billiard ball to rotate through the highest point, the billiard ball downwards drives the connecting rod to rotate around the pin, so that the billiard ball impacts the stud, the vibration of the stud and the lining is increased, the hardened materials adhered on the lining are further shaken off, and the efficiency of the materials in collision and crushing is increased.
Preferably, a through groove is formed in one side, far away from the connecting rod, of the billiard ball, and the width of the through groove is larger than the diameter of the stud and smaller than the outer diameter of the nut; an elastic washer is sleeved on the stud between the nut and the roller, and the elastic washer is in an incompletely pressed state; the through groove is used for preventing the billiard ball from contacting the stud when the billiard ball impacts the stud, so that the steel balls on two sides of the through groove are contacted with the nut, the contact area of the billiard ball and the nut is increased, the damage of the graphite column caused by the collision of the billiard ball with the graphite column is reduced, the service life of the graphite column is prolonged, meanwhile, the elastic washer which is not fully compressed is matched, the vibration distance of the stud and the lining is increased, and the efficiency of the collision and crushing of materials is further increased.
Preferably, a group of bristles are uniformly distributed on two sides of the inner wall of the through groove, and the lengths of the bristles are more than half of the width of the through groove; the brush hair that staggers each other brushes around the graphite post on double-screw bolt top, reduces the stone dust that forms because of wearing and tearing on the graphite post, and then reduces the short circuit electric leakage of circuit, guarantees the power consumption safety, reduces trouble and the potential safety hazard that the electric leakage causes.
Preferably, a cavity is formed in the billiard ball, and a first hole formed in the connecting rod is communicated with the cavity; a storage chamber is formed in the turntable, and iron sand is filled in the storage chamber; the storage chamber is communicated with the first hole through the second hole; when the billiards rotate around the pins and fall, iron sand flows from the storage chamber to the cavity, so that impact force of the steel balls on the nuts is increased, and meanwhile, the rebound of the steel balls is reduced by utilizing loose iron sand, so that impact efficiency of the steel balls on the nuts is further increased, and vibration shaking-off efficiency of the lining is increased.
Preferably, a sliding cylinder is sleeved at the position of the rotary pin positioned in the storage chamber, and one end of the sliding cylinder extending to the outside of the rotary table is fixedly connected with a balancing weight through a pull rod; the periphery of one end of the sliding cylinder, which is positioned in the storage chamber, is fixedly connected with a scraping plate, and the scraping plate is in a horizontal state; the scraper blade is in horizontal position small circle swing throughout through the balancing weight, and then stirs and drain iron sand, increases the efficiency that iron sand filled the cavity, increases the efficiency that iron sand backward flow flowed into the apotheca simultaneously, reduces the rotation resistance of gear No. one, reduces wearing and tearing.
Preferably, the position of the through groove close to the connecting rod is provided with an elastic deflector rod, and the deflector rod penetrates through the side wall of the cavity and extends into the inner wall of the cavity; one end of the deflector rod, which is positioned in the cavity, is fixedly connected with a small ball; the iron sand flows into the cavity to the impact ball to drive the poking rod to rotate, so that the sweeping effect of the poking rod on the residual graphite powder on the periphery of the graphite column is further improved.
Preferably, a cylindrical rubber ring is sleeved at the position corresponding to the side wall of the cavity on the periphery of the deflector rod, and the deflector rod is in sealing connection with the side wall of the cavity through the rubber ring; flanges are arranged at two ends of the rubber ring, and the end face of the flange positioned at one side in the cavity is in a hemispherical structure; a group of air storage chambers are uniformly distributed in the side flange and are communicated with the cavity through spray holes, and the diameter of the spray holes is smaller than that of the iron sand particles; the deflector rod is isolated from the inner wall of the cavity through the elastic rubber ring, so that the consumption of swing energy when the deflector rod is impacted by iron sand is reduced, the swing range and swing time of the deflector rod are further increased, the cleaning time of the deflector rod to graphite powder is prolonged, meanwhile, the flange positioned on one side in the cavity is extruded when the deflector rod swings, the air flow is ejected after the air storage chamber contracts, the loosening of the iron sand is further increased, and the reduction of the flowability of the iron sand in the cavity is realized by the reduction of the slab.
The beneficial effects of the invention are as follows:
1. according to the preparation method of the composite permanent magnet material, the conductive rail is used for supplying power to the stud, so that the electromagnet at the corresponding position of the stud is electrified to attract the steel ball, when the steel ball reaches the highest point of the roller along with the lining, the stud is separated from the conductive rail, at the moment, the electromagnet is powered off and loses attraction to the steel ball, the falling height difference of the steel ball is increased, the impact force of the steel ball on materials is further improved, and the grinding and crushing efficiency of the materials is further improved.
2. According to the preparation method of the composite permanent magnetic material, the through grooves enable the billiards to be not in contact with the studs when the billiards strike the studs, so that the steel balls on two sides of the through grooves are in contact with the nuts, the contact area of the billiards and the nuts is increased, the damage of the graphite columns caused by the billiards striking the graphite columns is reduced, the service life of the graphite columns is prolonged, meanwhile, the elastic washers which are not fully pressed are matched, the vibration distance of the studs and the lining is increased, and the efficiency of the materials involved in collision and crushing is further increased.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a cross-sectional view of the section at A-A in FIG. 2;
FIG. 5 is an enlarged view of a portion of FIG. 4 at B;
FIG. 6 is a schematic view of the structure of the turntable in the present invention;
FIG. 7 is an enlarged view of a portion of FIG. 5 at C;
in the figure: the machine body 1, the roller 11, the gear motor 12, the inner liner 13, the stud 15, the nut 16, the bracket 17, the rotating shaft 18, the conductive rail 19, the electromagnet 2, the steel ball 21, the blind hole 22, the graphite column 23, the air injection hole 24, the sealing ring 25, the first gear 14, the rotary pin 26, the second gear 27, the rotary disc 28, the wedge groove 29, the pin 3, the shaft sleeve 31, the connecting rod 32, the billiard ball 33, the through groove 34, the elastic washer 35, the brush hair 36, the cavity 37, the first hole 38, the storage chamber 39, the second hole 4, the sliding cylinder 41, the pull rod 42, the balancing weight 43, the scraping plate 44, the deflector 45, the small ball 46, the rubber ring 47, the flange 48, the air storage chamber 49 and the spray hole 5.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Example 1
As shown in fig. 1 to 3, the preparation method of the composite permanent magnetic material according to the embodiment of the invention comprises the following steps:
s1, putting large-particle soft magnetic materials into a ball mill, starting a gear motor 12 to drive a roller 11 to rotate, continuously colliding and grinding the soft magnetic materials in the roller 11 by utilizing a steel ball 21 to grind and crush the soft magnetic materials, supplying power to an electromagnet 2 by utilizing a conductive rail 19 to increase the lifting height of the steel ball 21, increasing crushing efficiency, vacuumizing the roller 11 after the diameter of powder particles after crushing is smaller than 0.5mm, and then adding rare earth elements Sm into the roller 11 and continuously grinding until the diameter of the powder particles is smaller than 0.05mm to obtain a mixture M;
s2, mixing the mixture M with the hard magnetic material, uniformly stirring to obtain a mixture N, filling the mixture N into a mold, carrying out pressurized high-temperature sintering under the protection of inert gas, naturally cooling after sintering, and grinding and crushing to obtain the composite permanent magnetic material
The ball mill in S1 comprises a machine body 1 and a roller 11, wherein the roller 11 is rotationally connected to the top of the machine body 1, and a rotating shaft 18 of the roller 11 is driven to rotate by a gear motor 12; a group of inner liners 13 are uniformly distributed on the inner circumference of the roller 11, and studs 15 fixedly connected to one side of the inner liners 13 penetrate through the roller 11 and extend to the outer circumference of the roller 11; the screw bolt 15 is in threaded connection with a nut 16; a bracket 17 is fixedly connected to the periphery of the roller 11 at a position corresponding to the nut 16, the bracket 17 and the rotating shaft 18 are positioned on the same horizontal plane, two rows of arc-shaped conductive rails 19 are arranged at the top of the bracket 17 in an insulating manner, and the conductive rails 19 are in contact with the end parts of the studs 15 at the corresponding positions; the stud 15 is in insulating sliding connection with the roller 11, and one end of the stud 15 extending into the liner 13 is electrically connected with the electromagnet 2; a plurality of steel balls 21 are filled in the roller 11; when the grinding machine is used, in the prior art, after the steel balls 21 in the grinding machine are lifted to a high position through the rotating roller 11, the materials to be ground are impacted, crushed and ground by falling of the steel balls 21, but the lifting height of the steel balls 21 is limited, and when the lifting speed is used for improving the height of the steel balls 21, the materials are also rotated and lifted along with the lifting speed, so that the materials cannot be fully hit when the steel balls 21 fall, the crushing efficiency of the materials is difficult to be improved, and more time and energy are required to be consumed for grinding operation; at this time, the invention supplies power to the stud 15 through the conductive rail 19, so that the electromagnet 2 at the corresponding position of the stud 15 is electrified to attract the steel ball 21, when the steel ball 21 reaches the highest point of the roller 11 along with the liner 13, the stud 15 is separated from the conductive rail 19, at this time, the electromagnet 2 is powered off and loses attraction to the steel ball 21, the drop height difference of the steel ball 21 is increased, the impact force of the steel ball 21 to materials is further improved, and the grinding and crushing efficiency of the materials is further improved.
As shown in fig. 5, a blind hole 22 is formed at one end of the stud 15, which is close to the conductive rail 19, a graphite column 23 is slidably connected in the blind hole 22, one end of the graphite column 23 is connected with the bottom of the blind hole 22 through a spring, and the other end of the graphite column 23 is in a hemispherical structure; through tip for hemispherical graphite post 23 cooperation spring, increase double-screw bolt 15 and conductor rail 19's laminating degree, and then increase electromagnet 2's circular telegram stability, reduce unexpected outage and make steel ball 21 drop, increase steel ball 21's lifting efficiency, reduce conductor rail 19 and double-screw bolt 15's wearing and tearing through removable graphite post 23 simultaneously, increase of service life.
The bottom of the blind hole 22 is provided with a gas spraying hole 24, and the gas spraying hole 24 penetrates through the lining 13 and is communicated with the inside of the roller 11; one end of the air injection hole 24, which is close to the rotating shaft 18, is provided with a one-way valve; the graphite column 23 is in clearance fit with the blind hole 22, and a conical elastic sealing ring 25 is fixedly connected to the bottom of the graphite column 23; when the graphite column 23 is extruded by the conductive rail 19, the graphite column 23 slides into the blind hole 22, so that compressed air generated in the blind hole 22 is sprayed into the roller 11 through the air spraying holes 24, the surface of the lining 13 adhered by the materials which are partially crushed into powder is further reduced, the loosening, mixing and turning effects of the materials are improved, the uniformity of the impact of the steel ball 21 on the materials is further improved, and the efficiency of sucking graphite powder into the blind hole 22 is improved by matching the sealing ring 25 when the graphite column 23 rebounds.
As shown in fig. 2 to 4, the top of the roller 11 is provided with a first gear 14, and the first gear 14 is rotatably connected with the machine body 1 through a rotary pin 26 and a support; a second gear 27 is fixedly connected to the periphery of the roller 11 at a position corresponding to the first gear 14, and the first gear 14 is meshed with the second gear 27; the side surface of the first gear 14 is fixedly connected with a rotary table 28, a group of wedge grooves 29 are uniformly distributed on the periphery of the rotary table 28, a shaft sleeve 31 is rotatably connected in the wedge grooves 29 through a pin 3, a billiard ball 33 is fixedly connected with the shaft sleeve 31 through a connecting rod 32, and the billiard ball 33 is correspondingly arranged with the stud 15; the gear number one 14 and the turntable 28 are driven to rotate through the gear number two 27, so that the connecting rod 32 is communicated with the billiard ball 33 to rotate anticlockwise, after the connecting rod 32 is communicated with the billiard ball 33 to rotate through the highest point, the billiard ball 33 downwards drives the connecting rod 32 to rotate around the pin 3, so that the billiard ball 33 impacts the stud 15, the vibration of the stud 15 and the lining 13 is increased, the hardened materials adhered on the lining 13 are further shaken off, and the efficiency of the materials participating in collision and crushing is increased.
As shown in fig. 5 to 6, a through groove 34 is formed on one side of the billiard ball 33 away from the connecting rod 32, and the width of the through groove 34 is larger than the diameter of the stud 15 and smaller than the outer diameter of the nut 16; an elastic washer 35 is sleeved on the stud 15 between the nut 16 and the roller 11, and the elastic washer 35 is in an incompletely pressed state; the through groove 34 enables the billiard ball 33 not to contact the stud 15 when striking the stud 15, the steel balls 21 at two sides of the through groove 34 are in contact with the nut 16, the contact area of the billiard ball 33 and the nut 16 is increased, the damage of the graphite column 23 caused by the billiard ball 33 striking the graphite column 23 is reduced, the service life of the graphite column 23 is prolonged, meanwhile, the elastic washer 35 which is not fully pressed is matched, the vibration distance of the stud 15 and the lining 13 is increased, and the efficiency of the collision and crushing of materials is further increased.
A group of bristles 36 are uniformly distributed on two sides of the inner wall of the through groove 34, and the length of each bristle 36 is greater than half of the width of the through groove 34; the brush hairs 36 which are staggered mutually brush the periphery of the graphite column 23 at the top end of the stud 15, so that stone abrasive powder formed by abrasion on the graphite column 23 is reduced, short-circuit electric leakage of a circuit is further reduced, the electricity utilization safety is ensured, and faults and potential safety hazards caused by electric leakage are reduced.
A cavity 37 is formed in the billiard ball 33, and a first hole 38 formed in the connecting rod 32 is communicated with the cavity 37; a storage chamber 39 is formed in the turntable 28, and iron sand is filled in the storage chamber 39; the storage chamber 39 is communicated with the first hole 38 through the second hole 4; when the billiard ball 33 rotates around the pin 3 and falls, iron sand flows from the storage chamber 39 to the cavity 37, so that the impact force of the steel ball 21 on the nut 16 is increased, and meanwhile, the rebound of the steel ball 21 is reduced by utilizing loose iron sand, the impact efficiency of the steel ball 21 on the nut 16 is further increased, and the vibration shaking-off efficiency of the lining 13 is increased.
A sliding cylinder 41 is sleeved at the position of the rotary pin 26 in the storage chamber 39, and a balancing weight 43 is fixedly connected with one end of the sliding cylinder 41 extending to the outside of the turntable 28 through a pull rod 42; a scraper 44 is fixedly connected to the periphery of one end of the sliding cylinder 41 positioned in the storage chamber 39, and the scraper 44 is in a horizontal state; the scraper 44 is always in the horizontal position and swings in a small range through the balancing weight 43, so that the iron sand is stirred and drained, the efficiency of filling the iron sand into the cavity 37 is increased, the efficiency of flowing the iron sand back into the storage chamber 39 is increased, the rotation resistance of the first gear 14 is reduced, and abrasion is reduced.
The position of the through groove 34, which is close to the connecting rod 32, is provided with an elastic deflector rod 45, and the deflector rod 45 penetrates through the side wall of the cavity 37 and extends into the inner wall of the cavity 37; a small ball 46 is fixedly connected to one end of the deflector rod 45, which is positioned in the cavity 37; through the inflow of iron sand into the cavity 37 to the impact ball 46, the deflector rod 45 is driven to rotate, and the cleaning effect of the deflector rod 45 on the residual graphite powder on the periphery of the graphite column 23 is further increased.
Example two
As shown in fig. 7, in comparative example one, another embodiment of the present invention is: a cylindrical rubber ring 47 is sleeved on the periphery of the deflector rod 45 and the corresponding position of the side wall of the cavity 37, and the deflector rod 45 is connected with the side wall of the cavity 37 in a sealing way through the rubber ring 47; flanges 48 are arranged at two ends of the rubber ring 47, and the end face of the flange 48 positioned at one side in the cavity 37 is of a hemispherical structure; a group of air storage chambers 49 are uniformly distributed in the side flange 48, the air storage chambers 49 are communicated with the cavity 37 through spray holes 5, and the diameter of the spray holes 5 is smaller than that of the iron sand particles; the deflector rod 45 is isolated from the inner wall of the cavity 37 through the elastic rubber ring 47, so that the consumption of swing energy when the deflector rod 45 is impacted by iron sand is reduced, the swing range and swing time of the deflector rod 45 are further increased, the cleaning time of the deflector rod 45 to graphite powder is prolonged, meanwhile, the flange 48 positioned on one side in the cavity 37 is extruded when the deflector rod 45 swings, the air storage chamber 49 is contracted and then sprays air flow, the loosening of the iron sand is further increased, and the reduction of the flowability of the iron sand due to the slab in the cavity 37 is reduced.
When the electric grinder works, the electric power is supplied to the stud 15 through the conductive rail 19, so that the electromagnet 2 at the corresponding position of the stud 15 is electrified to attract the steel ball 21 at the rear part, and when the steel ball 21 reaches the highest point of the roller 11 along with the liner 13, the stud 15 is separated from the conductive rail 19, at the moment, the electromagnet 2 is powered off and loses attraction to the steel ball 21, the falling height difference of the steel ball 21 is increased, the impact force of the steel ball 21 on materials is further improved, and the grinding and crushing efficiency of the materials is further improved; the graphite column 23 with the hemispherical end is matched with a spring, so that the fit degree of the stud 15 and the conductive rail 19 is increased, the electrifying stability of the electromagnet 2 is further improved, accidental power failure is reduced, the steel ball 21 falls off, the lifting efficiency of the steel ball 21 is improved, meanwhile, the abrasion of the conductive rail 19 and the stud 15 is reduced through the replaceable graphite column 23, and the service life is prolonged; when the graphite column 23 is extruded by the conductive rail 19, the graphite column 23 slides into the blind hole 22, so that compressed air generated in the blind hole 22 is sprayed into the roller 11 through the air spraying holes 24, the surface of the liner 13 adhered by the material partially crushed into powder is further reduced, the loosening, mixing and turning effects of the material are improved, the uniformity of the impact of the steel ball 21 on the material is further improved, and the efficiency of sucking graphite powder into the blind hole 22 is improved by matching with the sealing ring 25 when the graphite column 23 rebounds; the gear number one 14 and the turntable 28 are driven to rotate through the gear number two 27, so that the connecting rod 32 is communicated with the billiard ball 33 to rotate anticlockwise, after the connecting rod 32 is communicated with the billiard ball 33 to rotate around the pin 3, the billiard ball 33 downwards drives the connecting rod 32 to rotate around the pin 3, and then the billiard ball 33 is enabled to impact the stud 15, so that the vibration of the stud 15 and the lining 13 is increased, the hardened materials adhered on the lining 13 are further shaken off, and the efficiency of the materials participating in collision and crushing is increased; the through groove 34 enables the billiard ball 33 not to contact the stud 15 when striking the stud 15, so that the steel balls 21 at two sides of the through groove 34 contact the nut 16, the contact area of the billiard ball 33 and the nut 16 is increased, the damage of the graphite column 23 caused by the billiard ball 33 striking the graphite column 23 is reduced, the service life of the graphite column 23 is prolonged, meanwhile, the elastic washer 35 which is not fully pressed is matched, the vibration distance of the stud 15 and the lining 13 is increased, and the efficiency of the collision and crushing of materials is further increased; the brush hairs 36 which are mutually staggered brush around the graphite column 23 at the top end of the stud 15, so that stone abrasive powder formed by abrasion on the graphite column 23 is reduced, short circuit electric leakage of a circuit is further reduced, electricity utilization safety is ensured, and faults and potential safety hazards caused by electric leakage are reduced; when the billiard ball 33 rotates around the pin 3 and falls, iron sand flows from the storage chamber 39 to the cavity 37, so that the impact force of the steel ball 21 on the nut 16 is increased, and meanwhile, the rebound of the steel ball 21 is reduced by utilizing loose iron sand, the impact efficiency of the steel ball 21 on the nut 16 is further increased, and the vibration shaking-off efficiency of the lining 13 is increased; the scraper 44 is always in a horizontal position and swings in a small range through the balancing weight 43, so that the iron sand is stirred and drained, the efficiency of filling the iron sand into the cavity 37 is increased, the efficiency of flowing the iron sand back into the storage chamber 39 is increased, the rotation resistance of the first gear 14 is reduced, and abrasion is reduced; through the inflow of iron sand into the cavity 37 to the impact ball 46, the deflector rod 45 is driven to rotate, and the cleaning effect of the deflector rod 45 on the residual graphite powder on the periphery of the graphite column 23 is further increased.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A preparation method of a composite permanent magnet material is characterized by comprising the following steps: the method comprises the following steps:
s1, putting large-particle soft magnetic materials into a ball mill, starting a gear motor (12) to drive a roller (11) to rotate, grinding and crushing the soft magnetic materials by utilizing continuous collision and grinding of the steel balls (21) and the soft magnetic materials in the roller (11), supplying power to an electromagnet (2) by matching with a conductive rail (19) to increase the lifting height of the steel balls (21), increasing the crushing efficiency, vacuumizing the roller (11) after the diameter of powder particles after crushing is smaller than 0.5mm, and then adding rare earth elements Sm into the roller (11) and continuously grinding until the diameter of the powder particles is smaller than 0.05mm to obtain a mixture M;
s2, mixing the mixture M with a hard magnetic material, uniformly stirring to obtain a mixture N, filling the mixture N into a mold, carrying out high-temperature sintering under the protection of inert gas, naturally cooling after sintering, and grinding and crushing to obtain the composite permanent magnetic material;
the ball mill in S1 comprises a machine body (1) and a roller (11), wherein the top of the machine body (1) is rotationally connected with the roller (11), and a rotating shaft (18) of the roller (11) is driven to rotate through a reducing motor (12); a group of inner liners (13) are uniformly distributed on the inner circumference of the roller (11), and studs (15) fixedly connected to one side of the inner liners (13) penetrate through the roller (11) and extend to the outer circumference of the roller (11); a nut (16) is connected to the stud (15) in a threaded manner; the periphery of the roller (11) is fixedly connected with a bracket (17) at a position corresponding to the nut (16), the bracket (17) and the rotating shaft (18) are positioned on the same horizontal plane, two rows of arc-shaped conductive rails (19) are arranged at the top of the bracket (17) in an insulating manner, and the conductive rails (19) are contacted with the end parts of the studs (15) at the corresponding positions; the stud (15) is in insulating sliding connection with the roller (11), and one end of the stud (15) extending to the inside of the lining (13) is electrically connected with the electromagnet (2); a plurality of steel balls (21) are filled in the roller (11);
a blind hole (22) is formed in one end, close to the conductive rail (19), of the stud (15), a graphite column (23) is connected in the blind hole (22) in a sliding manner, one end of the graphite column (23) is connected with the bottom of the blind hole (22) through a spring, and the other end of the graphite column (23) is of a hemispherical structure;
the bottom of the blind hole (22) is provided with a gas spraying hole (24), and the gas spraying hole (24) penetrates through the lining (13) and is communicated with the inside of the roller (11); one end of the air injection hole (24) close to the rotating shaft (18) is provided with a one-way valve; the graphite column (23) is in clearance fit with the blind hole (22), and a conical elastic sealing ring (25) is fixedly connected to the bottom of the graphite column (23);
the top of the roller (11) is provided with a first gear (14), and the first gear (14) is rotationally connected with the machine body (1) through a rotary pin (26) and a support; the periphery of the roller (11) is fixedly connected with a second gear (27) at a position corresponding to the first gear (14), and the first gear (14) is meshed with the second gear (27); the side of the first gear (14) is fixedly connected with a rotary table (28), a group of wedge grooves (29) are uniformly distributed on the periphery of the rotary table (28), shaft sleeves (31) are connected in the wedge grooves (29) through pins (3) in a rotating mode, the shaft sleeves (31) are fixedly connected with billiards (33) through connecting rods (32), and the billiards (33) are correspondingly arranged with the studs (15).
2. The method for preparing the composite permanent magnetic material according to claim 1, wherein the method comprises the following steps: a through groove (34) is formed in one side, far away from the connecting rod (32), of the billiard ball (33), and the width of the through groove (34) is larger than the diameter of the stud (15) and smaller than the outer diameter of the nut (16); an elastic washer (35) is sleeved on the stud (15) between the nut (16) and the roller (11), and the elastic washer (35) is in an incompletely pressed state.
3. The method for preparing the composite permanent magnetic material according to claim 2, wherein the method comprises the following steps: a group of bristles (36) are uniformly distributed on two sides of the inner wall of the through groove (34), and the length of each bristle (36) is greater than half of the width of the through groove (34).
4. A method of producing a composite permanent magnet material according to claim 3, wherein: a cavity (37) is formed in the billiard ball (33), and a first hole (38) formed in the connecting rod (32) is communicated with the cavity (37); a storage chamber (39) is formed in the turntable (28), and iron sand is filled in the storage chamber (39); the storage chamber (39) is communicated with the first hole (38) through the second hole (4).
5. The method for preparing the composite permanent magnetic material according to claim 4, wherein the method comprises the following steps: a sliding cylinder (41) is sleeved at the position of the rotary pin (26) in the storage chamber (39), and a balancing weight (43) is fixedly connected to one end of the sliding cylinder (41) extending to the outside of the rotary table (28) through a pull rod (42); the periphery of one end of the sliding cylinder (41) positioned in the storage chamber (39) is fixedly connected with a scraping plate (44), and the scraping plate (44) is in a horizontal state.
6. The method for preparing the composite permanent magnetic material according to claim 5, wherein the method comprises the following steps: the position of the through groove (34) close to the connecting rod (32) is provided with an elastic deflector rod (45), and the deflector rod (45) penetrates through the side wall of the cavity (37) and extends into the inner wall of the cavity (37); one end of the deflector rod (45) positioned in the cavity (37) is fixedly connected with a small ball (46).
7. The method for preparing the composite permanent magnetic material according to claim 6, wherein the method comprises the following steps: a cylindrical rubber ring (47) is sleeved at the periphery of the deflector rod (45) and the side wall of the cavity (37), and the deflector rod (45) is connected with the side wall of the cavity (37) in a sealing way through the rubber ring (47); flanges (48) are arranged at two ends of the rubber ring (47), and the end face of the flange (48) positioned at one side in the cavity (37) is of a hemispherical structure; a group of air storage chambers (49) are uniformly distributed in the side flange (48), the air storage chambers (49) are communicated with the cavity (37) through spray holes (5), and the diameter of the spray holes (5) is smaller than that of iron sand particles.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111649502.3A CN114210420B (en) | 2021-12-30 | 2021-12-30 | Preparation method of composite permanent magnet material |
| CN202211544992.5A CN117854905A (en) | 2021-12-30 | 2021-12-30 | Preparation method of composite permanent magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111649502.3A CN114210420B (en) | 2021-12-30 | 2021-12-30 | Preparation method of composite permanent magnet material |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211544992.5A Division CN117854905A (en) | 2021-12-30 | 2021-12-30 | Preparation method of composite permanent magnet material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114210420A CN114210420A (en) | 2022-03-22 |
| CN114210420B true CN114210420B (en) | 2023-08-01 |
Family
ID=80706869
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211544992.5A Pending CN117854905A (en) | 2021-12-30 | 2021-12-30 | Preparation method of composite permanent magnet material |
| CN202111649502.3A Active CN114210420B (en) | 2021-12-30 | 2021-12-30 | Preparation method of composite permanent magnet material |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211544992.5A Pending CN117854905A (en) | 2021-12-30 | 2021-12-30 | Preparation method of composite permanent magnet material |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN117854905A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115448715A (en) * | 2022-07-25 | 2022-12-09 | 矿冶科技集团有限公司 | Method for manufacturing dry-pressed sintered ferrite permanent magnet material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823013A (en) * | 2009-03-06 | 2010-09-08 | 北京化工大学 | Ball grinder available for solid state reaction of powder |
| CN108355782A (en) * | 2018-04-27 | 2018-08-03 | 刘大康 | A kind of two formula ball mill of mining dry and wet |
| CN209049464U (en) * | 2018-08-27 | 2019-07-02 | 曲靖师范学院 | A kind of ball mill of broken magnetic material |
| CN110918201A (en) * | 2019-12-10 | 2020-03-27 | 朱义法 | Novel magnetic ball mill |
| CN112121927A (en) * | 2020-09-14 | 2020-12-25 | 林东杰 | Ball mill for realizing fine grinding by utilizing magnetic repulsion |
| CN112934381A (en) * | 2021-02-08 | 2021-06-11 | 杨凌剑 | Novel ball mill is used in wall materials processing |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1920095A1 (en) * | 1969-04-21 | 1970-10-22 | Westfalia Dinnendahl Groeppel | Grinding plant |
| US5383615A (en) * | 1989-10-03 | 1995-01-24 | The Australian National University | Ball milling apparatus |
| CN101877264B (en) * | 2009-04-30 | 2012-12-12 | 比亚迪股份有限公司 | Rare earth-based permanent magnetic material and preparation method thereof |
| CN103240149B (en) * | 2013-04-24 | 2015-09-16 | 长春奥瑞投资管理有限公司 | Garbage crushing device and refuse breaking method |
| CN210410989U (en) * | 2019-06-29 | 2020-04-28 | 焦作市增氟科技有限公司 | Fluorite ball apparatus for producing that noise is low |
| CN211246788U (en) * | 2019-11-23 | 2020-08-14 | 佛山锦荣磁性材料科技有限公司 | Magnetic material ball mill |
| CN111420759B (en) * | 2020-04-03 | 2021-07-20 | 娄底市利通磁电科技有限公司 | Soft magnetic core grinds and uses ball mill |
| CN214916645U (en) * | 2021-04-21 | 2021-11-30 | 北京京茂香源科技发展有限公司 | Sesame paste grinding device |
-
2021
- 2021-12-30 CN CN202211544992.5A patent/CN117854905A/en active Pending
- 2021-12-30 CN CN202111649502.3A patent/CN114210420B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823013A (en) * | 2009-03-06 | 2010-09-08 | 北京化工大学 | Ball grinder available for solid state reaction of powder |
| CN108355782A (en) * | 2018-04-27 | 2018-08-03 | 刘大康 | A kind of two formula ball mill of mining dry and wet |
| CN209049464U (en) * | 2018-08-27 | 2019-07-02 | 曲靖师范学院 | A kind of ball mill of broken magnetic material |
| CN110918201A (en) * | 2019-12-10 | 2020-03-27 | 朱义法 | Novel magnetic ball mill |
| CN112121927A (en) * | 2020-09-14 | 2020-12-25 | 林东杰 | Ball mill for realizing fine grinding by utilizing magnetic repulsion |
| CN112934381A (en) * | 2021-02-08 | 2021-06-11 | 杨凌剑 | Novel ball mill is used in wall materials processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117854905A (en) | 2024-04-09 |
| CN114210420A (en) | 2022-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114210420B (en) | Preparation method of composite permanent magnet material | |
| CN209287396U (en) | A kind of animal husbandry feed breaking means | |
| CN110227583B (en) | Throw impact formula rubble system sand machine | |
| CN201135895Y (en) | Counterattack plate type fine breaking machine | |
| CN209109283U (en) | A kind of magnetic-type medicinal material ball mill | |
| CN109985694B (en) | Cement deblocking machine with magnetic resonance crushing function | |
| CN202238183U (en) | Centrifugal mill | |
| CN217512005U (en) | Herbal pieces-breaker with lift upset rolling function | |
| CN214076999U (en) | Green energy-conserving high-efficient grinding type ball mill | |
| CN200987991Y (en) | Pulverizing and grinding machine | |
| CN108951524A (en) | A kind of road deicer | |
| CN101912802B (en) | Vertical combined ball grinder | |
| CN104209173B (en) | A kind of double mass Near resonance oscillating breaks grinding machine | |
| CN203448145U (en) | Dry-type ball crusher | |
| CN2832295Y (en) | Reversible hammer crusher | |
| CN2543594Y (en) | Beating sieving combined crusher | |
| CN110270394B (en) | Aggregate crushing device and method | |
| CN113058704A (en) | Raw materials grinds anti-caking device for cosmetics production | |
| CN207385599U (en) | A kind of dedusting high capacity crusher | |
| CN2296767Y (en) | Superfine crusher | |
| CN201776168U (en) | Combinational ball mill | |
| CN214346908U (en) | High-strength high-toughness mining wear-resistant steel ball | |
| CN205570436U (en) | Traditional chinese medicine medicinal material reducing mechanism | |
| CN204429392U (en) | A kind of hammer vibro-crusher | |
| CN204074205U (en) | A kind of double mass Near resonance oscillating breaks grinding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230703 Address after: 435300 group 6, Liuhe village, Liuhe Town, Qichun County, Huanggang City, Hubei Province Applicant after: HUBEI XINYUAN ELECTRONIC CO.,LTD. Address before: 215000 No. 276, beipaijiu Road, Taicang City, Suzhou City, Jiangsu Province Applicant before: Mao Xingxing |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |