CN217666410U

CN217666410U - Magnetic field press

Info

Publication number: CN217666410U
Application number: CN202221359832.9U
Authority: CN
Inventors: 叶太健; 郑方; 董永安; 李平澜; 黄振峰; 吴林盛
Original assignee: Jiangxi Kaiyuan Automation Equipment Co ltd
Current assignee: Jiangxi Kaiyuan Automation Equipment Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-10-28
Anticipated expiration: 2032-06-02

Abstract

The utility model relates to a processing equipment of tombarthite permanent magnet material especially neodymium iron boron permanent magnet material specifically is a magnetic field press. The problem of the shaping density of current magnetic field press is higher relatively is solved. The magnetic field press comprises a frame, a lower oil cylinder fixed on the frame, a horizontal support plate and a die; a piston rod of the lower oil cylinder is vertically fixed with the horizontal support plate; the bottom of the mould is sealed, the top is open, the mould is divided into two parts by a plane horizontally passing through the mould cavity of the mould, the upper part is a metal mould made of metal, and the lower part is a rubber mould made of rubber; a rubber mould supporting cup made of metal is arranged on the horizontal supporting plate, the rubber mould supporting cup is driven to slide on the horizontal supporting plate, the rubber mould is arranged in the rubber mould supporting cup, and the metal mould is supported and fixed on the rack; and taking the rubber mold out of the rubber mold supporting cup, and covering the rubber mold with a rubber cover. The rare earth permanent magnetic powder is oriented and pressure-formed in the rubber mould, so that the forming density is reduced, and the orientation degree is improved.

Description

Magnetic field press

Technical Field

The utility model relates to a processing equipment of tombarthite permanent magnet material especially neodymium iron boron permanent magnet material specifically is a magnetic field press.

Background

The rare earth permanent magnetic material is usually formed secondarily, that is, the rare earth permanent magnetic powder is formed by orientation pressure of a magnetic field press machine and then is subjected to isostatic pressing by an isostatic pressing machine. The green density of the prior magnetic field press after the oriented pressure forming is usually 3.5 to 4.2g/cm ³ The temperature cannot be too low, otherwise, edges and corners of the green body are easy to be knocked off in the subsequent packaging and isostatic pressing process, and defects are generated; and the molding density is 3.5-4.2g/cm ³ ) The orientation of the magnetic field is relatively high, so that the orientation degree is influenced, and the magnetic performance of the final magnetic material is further influenced.

Disclosure of Invention

The utility model provides a relatively higher problem of shaping density of current magnetic field press, provide a magnetic field press. The magnetic field press directly orients and presses the rare earth permanent magnetic powder to be formed in or on the rubber mold, and carries out subsequent isostatic pressing along with the rubber mold, so that the forming density can be reduced, the orientation degree is improved, and the magnetic performance of the final rare earth permanent magnetic material is favorably improved.

The utility model discloses an adopt following technical scheme to realize: a magnetic field press comprises a frame, a lower oil cylinder fixed on the frame, a horizontal support plate and a die; a piston rod of the lower oil cylinder is vertically fixed with the horizontal support plate; the bottom of the mould is sealed, the top is open, the mould is divided into two parts by a plane horizontally passing through the mould cavity of the mould, the upper part is a metal mould made of metal, and the lower part is a rubber mould made of rubber; a rubber mould supporting cup made of metal is arranged on the horizontal supporting plate, the rubber mould supporting cup is driven to slide on the horizontal supporting plate, the rubber mould is arranged in the rubber mould supporting cup, the outer side wall and the bottom surface of the rubber mould are in contact with the inner side wall and the inner bottom surface of the rubber mould supporting cup (so that the rubber mould is prevented from being deformed under pressure), and the metal mould is supported and fixed on the rack; the rubber mold supporting cup is driven to slide to the position right below the metal mold, and the rubber mold and the metal mold are butted to form an integral mold under the action of the upper jacking pressure of the lower oil cylinder; the rare earth permanent magnetic powder is oriented and pressure molded in a mold cavity of the mold to form a green body, wherein the green body is completely positioned in the mold cavity of the rubber mold or one half of the green body is positioned in the mold cavity of the rubber mold and the other half of the green body is positioned in the mold cavity of the metal mold; and the lower oil cylinder moves downwards, the rubber mold supporting cup is driven to move out of the lower part of the metal mold, the rubber mold is taken out of the rubber mold supporting cup, and a rubber cover which is contacted with the top surface of the rubber mold and the upper surface of the green body or the other half surface of the green body is covered on the rubber mold. And (3) applying isostatic pressing to the rubber mould covered with the rubber cover, thereby completing the secondary molding of the rare earth permanent magnet material.

The magnetic field press directly orients and presses the rare earth permanent magnetic powder into or on the rubber mold, the problem that the edges and corners are easy to bump caused by low forming density is not needed, and the forming density is 3.0-3.4g/cm ³ The degree of orientation is reduced, the performance of the rare earth permanent magnetic material is improved, the residual magnetism of the same powder is improved by 200-400Gs; after isostatic pressing, the density is increased to 4.3-4.6g/cm ³ (isostatic pressing is carried out in all directions, so that the damage to the orientation is less), the volume is correspondingly reduced, and the demoulding is easy. The magnetic field press of the utility model is suitable for various die cavity shapes of dies, such as squares, balls, cylinders and the like. Lays a foundation for the automatic assembly line operation of the rare earth permanent magnetic material.

Drawings

Fig. 1 is a schematic structural diagram of a working state of a first embodiment of the magnetic field press according to the present invention;

fig. 2 is a schematic structural diagram of a second working state of the first embodiment of the magnetic field press according to the present invention;

fig. 3 is a schematic structural view of a third working state of the first embodiment of the magnetic field press according to the present invention;

FIG. 4 is a schematic view of a square green body formed in a rubber mold and covered with a rubber cover;

FIG. 5 is a schematic view of a square green article molded in half into a cavity of a rubber mold and in half into a cavity of a metal mold;

fig. 6 is a schematic structural diagram of a second working state of the embodiment of the magnetic field press of the present invention;

fig. 7 is a schematic structural diagram of a second working state of the second embodiment of the magnetic field press according to the present invention;

fig. 8 is a schematic structural view of a third working state of the second embodiment of the magnetic field press according to the present invention;

fig. 9 is a schematic view of the fourth structure of the second embodiment of the magnetic field press according to the present invention in the working state;

FIG. 10 is a schematic view of a cylindrical green compact having an axis perpendicular to the molding pressure direction, half molded in a cavity of a rubber mold, and the other half molded in a metal mold and covered with a rubber cover;

fig. 11 is a partially enlarged view of fig. 1.

In the figure: 1-frame, 2-lower oil cylinder, 3-horizontal support plate, 4-mould, 4.1-metal mould, 4.2-rubber mould, 5-rubber mould supporting cup, 6-rubber cover, 7-cylinder, 8-supporting upright post and 9-supporting flat plate.

Detailed Description

Example one

As shown in fig. 1-4, a magnetic field press comprises a frame 1, a lower oil cylinder 2 fixed on the frame 1, a horizontal support plate 3 and a die 4; a piston rod of the lower oil cylinder 2 is vertically fixed with the horizontal support plate 3; the bottom of the mould 4 is sealed, the top is open, the mould 4 is divided into two parts by the plane horizontally passing through the mould cavity of the mould, the upper part is a metal mould 4.1 made of metal, and the lower part is a rubber mould 4.2 made of rubber; a rubber mould supporting cup 5 made of metal is arranged on the horizontal supporting plate 3, the rubber mould supporting cup 5 is driven to slide on the horizontal supporting plate 3, a rubber mould 4.2 is arranged in the rubber mould supporting cup 5, the outer side wall and the bottom surface of the rubber mould 4.2 are in contact with the inner side wall and the inner bottom surface of the rubber mould supporting cup 5 (to prevent the rubber mould from being deformed under pressure), and a metal mould 4.1 is supported and fixed on the rack 1; the rubber mold supporting cup 5 is driven to slide to the position right below the metal mold 4.1, and under the action of the upper jacking pressure of the lower oil cylinder 2, the rubber mold 4.2 and the metal mold 4.1 are butted to form an integral mold 4; the rare earth permanent magnetic powder is oriented and pressure molded in a mold cavity of the mold to form a green body, and the green body is completely positioned in the mold cavity of the rubber mold 4.1 (shown in figure 4); the lower oil cylinder 2 moves downwards, the rubber mold supporting cup 5 is driven to move out of the position below the metal mold 4.1, the rubber mold 4.2 is taken out of the rubber mold supporting cup 5, and a rubber cover 6 which is in contact with the top surface of the rubber mold 4.2 and the upper surface of the green body is covered on the rubber mold 4.2. And (3) applying isostatic pressing to the rubber mould covered with the rubber cover, thereby completing the secondary molding of the rare earth permanent magnet material. This example is illustrated by a block (rectangular or square) green body. In specific implementation, the lower surface of the rubber cover 6 is provided with a bulge extending into the cavity of the rubber mold 4.2 so as to realize the contact between the rubber cover 6 and the upper surface of the green body; the rubber material adopted by the rubber mould 4.2 is slightly harder, and the hardness is 70-95. The rubber mold cup 5 is driven by a cylinder 7 fixed to the horizontal support plate 3. The metal mold 4.1 is supported and fixed on the frame 1 through a support frame, the support frame is composed of a support upright post 8 and a support flat plate 9, the upper end of the support upright post 8 is vertically fixed on the lower surface of the support flat plate 9, the lower end of the support upright post is fixed on the frame 1, a hole is formed in the support flat plate 9, a flange is arranged at the upper end of the metal mold 4.1, and the lower end of the metal mold 4.1 penetrates through the hole in the support flat plate 9 and is supported and fixed on the support flat plate 9 through the flange at the upper end. A plurality of die cavities are formed in the die 4, a plurality of green bodies are obtained through one-time orientation pressure forming, and the processing efficiency is improved.

Example two

As shown in fig. 5-10, a magnetic field press comprises a frame 1, a lower oil cylinder 2 fixed on the frame 1, a horizontal support plate 3 and a die 4; a piston rod of the lower oil cylinder 2 is vertically fixed with the horizontal support plate 3; the bottom of the mould 4 is sealed, the top is open, the mould 4 is divided into two parts by the plane horizontally passing through the mould cavity of the mould, the upper part is a metal mould 4.1 made of metal, and the lower part is a rubber mould 4.2 made of rubber; a rubber mould supporting cup 5 made of metal is arranged on the horizontal supporting plate 3, the rubber mould supporting cup 5 is driven to slide on the horizontal supporting plate 3, a rubber mould 4.2 is arranged in the rubber mould supporting cup 5, the outer side wall and the bottom surface of the rubber mould 4.2 are in contact with the inner side wall and the inner bottom surface of the rubber mould supporting cup 5 (to prevent the rubber mould from being deformed under pressure), and a metal mould 4.1 is supported and fixed on the rack 1; the rubber mold support cup 5 is driven to slide to the position right below the metal mold 4.1, and under the action of the upper jacking pressure of the lower oil cylinder 2, the rubber mold 4.2 is butted with the metal mold 4.1 to form an integral mold 4; the rare earth permanent magnetic powder is oriented and pressure-molded in the mold cavity to form a green body, wherein one half of the green body is positioned in the mold cavity of the rubber mold 4.2, and the other half of the green body is positioned in the mold cavity of the metal mold 4.1 (as shown in fig. 5 and 10); the lower oil cylinder 2 moves downwards, the rubber mold support cup 5 is driven to move out of the position below the metal mold 4.1, the rubber mold 4.2 is taken out of the rubber mold support cup 5, and a rubber cover 6 which is in contact with the top surface of the rubber mold 4.2 and the other half surface of the green body is covered on the rubber mold 4.2. And (3) applying isostatic pressing to the rubber mould covered with the rubber cover, thereby completing the secondary molding of the rare earth permanent magnet material. This embodiment is exemplified by a block-shaped (rectangular parallelepiped or square) green body or a cylindrical green body whose axis is perpendicular to the molding pressure direction. The square block (cuboid or cube) green body can be completely positioned in the cavity of the rubber mold (as in example one), or one half of the green body is positioned in the cavity of the rubber mold, and the other half of the green body is positioned in the cavity of the metal mold; half of the cylindrical green compact with the axis vertical to the forming pressure direction is positioned in the die cavity of the rubber die, and the other half of the cylindrical green compact is positioned in the die cavity of the metal die, so that the rubber cover 6 can be conveniently processed, and at the moment, the rubber cover 6 and the rubber die 4.2 have the same structure and shape and can be symmetrically covered on the rubber die 4.2; the rubber material adopted by the rubber mould 4.2 is slightly harder, and the hardness is 70-95. In specific implementation, the rubber mold supporting cup 5 is driven by an air cylinder 7 fixed on the horizontal supporting plate 3. The metal mold 4.1 is supported and fixed on the frame 1 through a support frame, the support frame is composed of a support upright post 8 and a support flat plate 9, the upper end of the support upright post 8 is vertically fixed on the lower surface of the support flat plate 9, the lower end of the support flat plate 9 is fixed on the frame 1, a hole is formed in the support flat plate 9, a flange is arranged at the upper end of the metal mold 4.1, and the lower end of the metal mold 4.1 penetrates through the hole in the support flat plate 9 and is supported and fixed on the support flat plate 9 through the flange at the upper end of the metal mold. A plurality of die cavities are formed in the die 4, a plurality of green bodies are obtained through one-time orientation pressure forming, and the processing efficiency is improved.

Claims

1. A magnetic field press is characterized by comprising a rack (1), a lower oil cylinder (2) fixed on the rack (1), a horizontal support plate (3) and a die (4); a piston rod of the lower oil cylinder (2) is vertically fixed with the horizontal supporting plate (3); the bottom of the mould (4) is sealed, the top is open, the mould (4) is divided into two parts by a plane horizontally passing through the mould cavity of the mould, the upper part is a metal mould (4.1) made of metal, and the lower part is a rubber mould (4.2) made of rubber; a rubber mold supporting cup (5) made of metal is arranged on the horizontal supporting plate (3), the rubber mold supporting cup (5) is driven to slide on the horizontal supporting plate (3), a rubber mold (4.2) is arranged in the rubber mold supporting cup (5) and enables the outer side wall and the bottom surface of the rubber mold (4.2) to be in contact with the inner side wall and the inner bottom surface of the rubber mold supporting cup (5), and a metal mold (4.1) is supported and fixed on the rack (1); the rubber mold support cup (5) is driven to slide to the position right below the metal mold (4.1), and under the action of the upward jacking pressure of the lower oil cylinder (2), the rubber mold (4.2) is butted with the metal mold (4.1) to form an integral mold (4); the rare earth permanent magnetic powder is formed in a die cavity by orientation pressure to form a green body, and the green body is completely positioned in the die cavity of the rubber die (4.1); the lower oil cylinder (2) moves downwards, the rubber mold supporting cup (5) is driven to move out of the lower portion of the metal mold (4.1), the rubber mold (4.2) is taken out of the rubber mold supporting cup (5), and a rubber cover (6) which is in contact with the top surface of the rubber mold (4.2) and the upper surface of the green body is covered on the rubber mold (4.2).

2. The magnetic field press of claim 1, wherein the green body is in the form of a block; the lower surface of the rubber cover (6) is provided with a bulge extending into the cavity of the rubber mould (4.2) so as to realize the contact between the rubber cover (6) and the upper surface of the green body.

3. A magnetic field press as claimed in claim 1 or 2, characterized in that the rubber mould cups (5) are driven by air cylinders (7) fixed to the horizontal support plate (3).

4. A magnetic field press as claimed in claim 3, characterized in that the metal mold (4.1) is supported and fixed on the frame (1) by a support frame, the support frame is composed of a support column (8) and a support plate (9), the upper end of the support column (8) is vertically fixed on the lower surface of the support plate (9), the lower end is fixed on the frame (1), the support plate (9) is provided with a hole, the upper end of the metal mold (4.1) is provided with a flange, and the lower end of the metal mold (4.1) passes through the hole on the support plate (9) and is supported and fixed on the support plate (9) by the flange at the upper end.

5. A magnetic field press according to claim 4, characterised in that the mould (4) has a plurality of mould cavities therein.

6. A magnetic field press is characterized by comprising a rack (1), a lower oil cylinder (2) fixed on the rack (1), a horizontal support plate (3) and a die (4); a piston rod of the lower oil cylinder (2) is vertically fixed with the horizontal supporting plate (3); the bottom of the mould (4) is sealed, the top is open, the mould (4) is divided into two parts by a plane horizontally passing through the mould cavity of the mould, the upper part is a metal mould (4.1) made of metal, and the lower part is a rubber mould (4.2) made of rubber; a rubber mold supporting cup (5) made of metal is arranged on the horizontal supporting plate (3), the rubber mold supporting cup (5) is driven to slide on the horizontal supporting plate (3), a rubber mold (4.2) is arranged in the rubber mold supporting cup (5) and enables the outer side wall and the bottom surface of the rubber mold (4.2) to be in contact with the inner side wall and the inner bottom surface of the rubber mold supporting cup (5), and a metal mold (4.1) is supported and fixed on the rack (1); the rubber mold support cup (5) is driven to slide to the position right below the metal mold (4.1), and under the action of the upward jacking pressure of the lower oil cylinder (2), the rubber mold (4.2) is butted with the metal mold (4.1) to form an integral mold (4); the rare earth permanent magnetic powder is formed in a die cavity by orientation pressure to form a green body, wherein one half of the green body is positioned in the die cavity of the rubber die (4.2), and the other half of the green body is positioned in the die cavity of the metal die (4.1); the lower oil cylinder (2) moves downwards, the rubber mold supporting cup (5) is driven to move out of the lower portion of the metal mold (4.1), the rubber mold (4.2) is taken out of the rubber mold supporting cup (5), and a rubber cover (6) which is in contact with the top surface of the rubber mold (4.2) and the other half surface of the green body is covered on the rubber mold (4.2).

7. The magnetic field press of claim 6, wherein the green compact is in the form of a block or cylinder having an axis perpendicular to the direction of the forming pressure; the rubber cover (6) and the rubber mould (4.2) have the same structure and shape, and the rubber cover is symmetrically covered on the rubber mould (4.2).

8. A magnetic field press according to claim 6 or 7, characterized in that the rubber mould cups (5) are driven by air cylinders (7) fixed to the horizontal support plate (3).

9. The magnetic field press according to claim 8, characterized in that the metal mold (4.1) is supported and fixed on the frame (1) by a support frame, the support frame is composed of a support column (8) and a support plate (9), the upper end of the support column (8) is vertically fixed on the lower surface of the support plate (9), the lower end of the support column is fixed on the frame (1), the support plate (9) is provided with a hole, the upper end of the metal mold (4.1) is provided with a flange, and the lower end of the metal mold (4.1) passes through the hole on the support plate (9) and is supported and fixed on the support plate (9) by the flange at the upper end.

10. A magnetic field press according to claim 9, characterised in that the mould (4) has a plurality of mould cavities therein.