CN111745786A

CN111745786A - Novel mould structure is used in production of magnetic shoe

Info

Publication number: CN111745786A
Application number: CN202010696233.5A
Authority: CN
Inventors: 许坚
Original assignee: Yancheng City Zhongtian Material Co ltd
Current assignee: Yancheng City Zhongtian Material Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2020-10-09

Abstract

The invention discloses a novel mould structure for producing magnetic shoes, which is applied to the field of processing of motor magnetic shoes and solves the technical problem of vibration and noise conditions under the working condition of the existing motor magnetic shoes as stators, and the technical scheme is characterized in that the novel mould structure comprises an upper mould, a cavity mould and a lower mould core, wherein the middle part of the cavity mould is provided with a central hole for the lower mould core to be inserted, and a magnetic shoe cavity is enclosed between the top end of the lower mould core and the upper mould, and the novel mould structure is characterized in that: the top of lower mold core is equipped with combination and inserts and dog, combination is inserted including inserting one and inserting two, insert one and insert two and locate the both sides of dog, the top both sides of lower mold core are equipped with respectively and supply to insert one and insert two a pair of hypotenuses of laminating, and is a pair of the hypotenuse sets up about the dog symmetry, the both sides in centre bore drill way still are equipped with magnetic force traction piece, combination is inserted and the die cavity mould is non-magnetic material, has the technological effect of improving motor magnetic shoe performance.

Description

Novel mould structure is used in production of magnetic shoe

Technical Field

The invention relates to the field of motor magnetic shoe processing, in particular to a novel mold structure for producing a magnetic shoe.

Background

At present, for the production of tile-shaped permanent magnetic ferrite products, a die with a combination of an upper female die and a lower male die is usually installed in a material cavity of a die carrier, a magnetizing coil is arranged on the periphery of the material cavity, slurry is injected into the material cavity, a press machine enables the upper female die and the lower male die to extrude, the magnetizing coil is electrified to generate a magnetic field, and magnetizing orientation, water pumping and demagnetization are completed simultaneously in the pressing process.

The lower convex die structure has the following defects that the magnetic field intensity in the cavity cannot be uniformly distributed due to the fact that the die has the function of magnetizing the iron core, the magnetic field intensity of the protruded part is strong, the magnetizing orientation of the tile-shaped permanent magnet product is not uniform, the magnetizing orientation of the middle part is often stronger than that of the two sides, and the waveform of the magnetic field of the magnetic tile is in a saddle shape when the magnetic tile is used as a stator (as shown in figure 3).

However, in order to improve vibration noise, research and development personnel rely on changing the magnetic field waveform of the magnetic shoe to achieve performance optimization, mainly to change the saddle-shaped waveform into a sine shape (as shown in fig. 4), and the existing means mainly changes the magnetic shoe mold to change the overall dimensions of the magnetic shoe, including the changes of thickness, radian and the like (as shown in fig. 5), but the change of the overall shape of the existing conventional magnetic shoe product (as shown in fig. 6) not only affects the structural strength and the like of the magnetic shoe itself, but also increases the product material consumption.

Disclosure of Invention

The invention aims to provide a novel mould structure for producing magnetic tiles, which is beneficial to improving the performance of the magnetic tiles and meeting the requirement of sine-wave magnetic field waveform.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a novel mould structure is used in magnetic shoe production, includes mould, die cavity mould and lower die core, and the middle part of die cavity mould is equipped with the centre bore that supplies die core to alternate down, encloses into the magnetic shoe cavity between the top of lower die core and the last mould, and the top of lower die core is equipped with the combination and inserts and the dog, and the combination is inserted including inserting one and inserting two, inserts one and insert two and locate the both sides of dog, and the top both sides of lower die core are equipped with respectively and supply to insert one and insert a pair of hypotenuse of two laminatings, and is a pair of the hypotenuse sets up about the dog symmetry, the both sides in centre bore drill way still are equipped with magnetic force traction piece.

Further: and the cavity die is provided with a fixing groove for embedding the magnetic traction block, and the magnetic traction block is connected with the fixing groove through a bolt.

Further: the pair of bevel edges are arranged at 90 degrees.

Further: the magnetic traction block is in a right-angle trapezoid shape.

Further: the groove wall of the fixed groove close to one side of the central hole is a chute edge, and the chute edges on two sides of the central hole are arranged at 90 degrees.

Further: and a space is arranged between the fixing groove and the central hole.

Further: the bottom of the upper die is provided with an arc-shaped groove.

Further: and the combined insert is welded with the bevel edge.

In conclusion, the invention has the following beneficial effects:

1. through the design of assembled mould to and adopt selection and arrangement of non-magnetic conduction and magnetic material, realized the inside stable route overall arrangement that magnetizes of mould, and then can satisfy the adjustment of processing personnel to the final magnetic property of magnetic shoe product, in order to reach predetermined whole effect of magnetizing, satisfy the magnetic field waveform requirement that final product can realize sinusoidal.

Drawings

FIG. 1 is a sectional view for showing a structure of a mold in the embodiment;

FIG. 2 is a schematic view for showing a magnetizing flow path in the embodiment;

FIG. 3 is a waveform diagram for showing the saddle-shaped induction lines of a prior art magnetic shoe product;

FIG. 4 is a waveform diagram for demonstrating the sinusoidal magnetic induction line of a prior art magnetic shoe product;

FIG. 5 is a view for showing the appearance of a prior art improved magnetic shoe;

fig. 6 is a schematic view for showing the conventional appearance of a magnetic shoe product in the prior art.

Reference numerals: 1. an upper die; 2. a cavity mold; 3. a lower mold core; 4. a central bore; 5. a magnetic shoe cavity; 6. combining the inserts; 7. a stopper; 8. an insert I; 9. a second insert; 10. a bevel edge; 11. a magnetic traction block; 12. fixing grooves; 13. a chute edge; 14. spacing; 15. an arc-shaped groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a novel mould structure for producing magnetic shoes is shown in figure 1 and comprises an upper mould 1, a cavity mould 2 and a lower mould core 3, wherein the cavity mould 2 is made of stainless steel, and the upper mould 1 and the lower mould are made of 45# steel. The middle part of the cavity die 2 is provided with a central hole 4 for the lower die core 3 to penetrate, the lower die core 3 is inserted from the central hole 4, the bottom of the upper die 1 is provided with an arc-shaped groove 15, and a magnetic shoe cavity 5 is enclosed between the top end of the lower die core 3 and the upper die 1.

The top end of the lower die core 3 is provided with a combined insert 6 and a stop block 7, the combined insert 6 is a non-magnetic material of 50Mn non-magnetic steel, the combined insert 6 comprises a first insert 8 and a second insert 9, the first insert 8 and the second insert 9 are respectively arranged on two sides of the stop block 7, a pair of bevel edges 10 for the first insert 8 and the second insert 9 to be attached are respectively arranged on two sides of the top end of the lower die core 3, and the combined insert 6 and the bevel edges 10 are welded and fixed. And a pair of inclined edges 10 are symmetrically arranged about the stopper 7, such that 90 degrees is formed between the pair of inclined edges 10.

The two sides of the hole of the central hole 4 are also provided with magnetic traction blocks 11, the magnetic traction blocks 11 are 45# steel magnetic strips, the cavity die 2 is provided with fixing grooves 12 for the magnetic traction blocks 11 to be embedded, and the magnetic traction blocks 11 are fixed with the fixing grooves 12 through bolts.

The magnetic traction block 11 is in a right trapezoid shape, a gap 14 is formed between the fixing groove 12 and the central hole 4, the groove wall of the fixing groove 12 close to one side of the central hole 4 is a chute edge 13, and the chute edges 13 on two sides of the central hole 4 are arranged at 90 degrees.

The specific working process is as follows: the wet-pressing forming of the magnetic shoe is carried out in the magnetic shoe cavity 5 formed in the area among the combined insert 6, the central hole 4 and the arc-shaped groove 15 of the upper die 1 through the assembly of the upper die 1, the cavity die 2 and the lower die core 3. After the forming is completed, the parallel magnetic field magnetizing process is carried out, because in the mold, the cavity mold 2 and the combined insert 6 both adopt non-magnetic-conductive materials, in the magnetizing process, a fixed magnetizing flow channel (as shown in fig. 2) is formed, so that in the magnetizing process aiming at the magnetic tile product, a magnetic field can enter the magnetic tile from the baffle 7 and the interval 14 part between the fixed groove 12 and the central hole 4, the combined insert 6 is beneficial to improving the surface magnetism of the central inner arc of the magnetic tile product, meanwhile, the magnetic force traction blocks 11 on two sides can realize the migration of the magnetic field distribution in the magnetic tile product to the two ends, the reduction of the outer arc surface magnetism of the magnetic tile product is realized, and finally, the surface magnetism of the inner arc of the magnetic tile product is stronger than that of the outer arc, so as to meet the requirement of sine wave shape of the product.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a novel mould structure is used in magnetic shoe production, includes last mould (1), die cavity mould (2) and lower die core (3), the middle part of die cavity mould (2) is equipped with centre bore (4) that supply lower die core (3) to alternate, enclose into magnetic shoe cavity (5), characterized by between the top of lower die core (3) and last mould (1): the top of lower mold core (3) is equipped with combination insert (6) and dog (7), combination insert (6) are including inserting one (8) and inserting two (9), insert one (8) and insert two (9) and divide the both sides of locating dog (7), the top both sides of lower mold core (3) are equipped with respectively and supply a pair of hypotenuse (10) of inserting one (8) and inserting two (9) laminating, and is a pair of hypotenuse (10) set up about dog (7) symmetry, the both sides in centre bore (4) drill way still are equipped with magnetic force traction piece (11), combination insert (6) and die cavity mould (2) are non-magnetic material.

2. The novel mold structure for producing magnetic tiles as claimed in claim 1, wherein: and a fixing groove (12) for embedding the magnetic traction block (11) is arranged on the cavity die (2).

3. The novel mold structure for producing magnetic tiles as claimed in claim 1, wherein: the pair of inclined edges (10) are arranged at 90 degrees.

4. The novel mold structure for producing magnetic tiles as claimed in claim 1, wherein: the magnetic traction block (11) is in a right-angle trapezoid shape.

5. The novel mold structure for producing magnetic tiles as claimed in claim 2, wherein: the groove wall of the fixing groove (12) close to one side of the central hole (4) is a chute edge (13), and the chute edges (13) on two sides of the central hole (4) are arranged at 90 degrees.

6. The novel mold structure for producing magnetic tiles as claimed in claim 2, wherein: and a space (14) is arranged between the fixing groove (12) and the central hole (4).

7. The novel mold structure for producing magnetic tiles as claimed in claim 1, wherein: the bottom of the upper die (1) is provided with an arc-shaped groove (15).

8. The novel mold structure for producing magnetic tiles as claimed in claim 1, wherein: the combined insert (6) is welded with the bevel edge (10).