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Magnetic material powder forming device and method

A magnetic material and powder technology, applied in the field of magnetic material powder molding device, can solve problems such as easy cracks, achieve the effect of eliminating pressure and avoiding difficult demoulding

Inactive Publication Date: 2013-03-13
JIANGXI JLMAG RARE EARTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the forming blank is gradually released from the female mold, the pressure and friction of the female mold gradually disappear, and the ejection force of the lower punch decreases with the decrease of the frictional force, so during the entire demoulding process, the force applied to the forming blank Large and changing, so it is very easy to produce cracks and other defects during the demoulding process

Method used

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  • Magnetic material powder forming device and method
  • Magnetic material powder forming device and method
  • Magnetic material powder forming device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A magnetic material powder molding die, which includes a female mold, the female mold includes a front side plate 221, a rear side plate 241, a left pressure head 224 and a right pressure head 225, the front side plate 221, the rear side plate Side plate 241, upper cover plate 222, ejector block 223, described left indenter 224, described right indenter 225 and base plate 227 encircle mold cavity, and the shape of described mold cavity is the shape of tile-shaped blank 226, so The shape of the forming surface of the upper cover plate 222 is the same as that of the convex cylindrical surface 22 of the tile-shaped blank 226, and the shape of the forming surface of the ejector block 223 is the same as that of the concave cylindrical surface or plane 23 of the tile-shaped blank 226. The shape of the forming surface of the indenter 224 is the same as that of the left curved surface 24 of the tile-shaped blank 226, the shape of the forming surface of the right indenter 225 is ...

Embodiment 2

[0049] A magnetic material powder molding die, which includes a female mold, the female mold includes a front side plate 331, a rear side plate 341, a left pressure head 334 and a right pressure head 335, the front side plate 331, the rear side plate 331 Side plate 341, upper cover plate 332, ejector block 333, described left indenter 334, described right indenter 335 and base plate 337 encircle mold cavity, and the shape of described mold cavity is the shape of tile-shaped blank 336, so The shape of the forming surface of the upper cover plate 332 is the same as that of the convex cylindrical surface 32 of the tile-shaped blank 336, and the shape of the forming surface of the ejector block 333 is the same as that of the concave cylindrical surface or plane 33 of the tile-shaped blank 336. The shape of the forming surface of the indenter 334 is the same as that of the left curved surface 34 of the tile-shaped blank 336, the shape of the forming surface of the right indenter 335...

Embodiment 3

[0051] A magnetic material powder molding die, which includes a female mold, the female mold includes a front side plate 221, a rear side plate 241, a left pressure head 224 and a right pressure head 225, the front side plate 221, the rear side plate Side plate 241, upper cover plate 222, ejector block 223, described left indenter 224, described right indenter 225 and base plate 227 encircle mold cavity, and the shape of described mold cavity is the shape of tile-shaped blank 226, so The shape of the forming surface of the upper cover plate 222 is partly the same as the shape of the convex cylindrical surface 22 of the tile-shaped blank 226, and the shape of the forming surface of the ejector block 223 is the same as the shape of the concave cylindrical surface or plane 23 of the tile-shaped blank 226. The shape of the forming surface of the left indenter 224 is the same as that of the left curved surface 24 of the tile-shaped blank 226 and the shape of part of the adjacent out...

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Abstract

The invention belongs to the field of material forming and particularly relates to a magnetic material powder forming device and a forming method. The forming device consists of a forming press and a forming mold, wherein the forming press comprises a machine frame, an upper magnetic field coil, a lower magnetic field coil, an upper cover plate driving device, an ejector block driving device, a left pressing head driving device and a right pressing head driving device, the forming mold is surrounded into a mold cavity by a front side plate, a back side plate, an upper cover plate, an ejector block, a left pressing head, a right pressing head and a bottom plate, and the mold cavity is in a tile shape. According to the forming method, the forming press and the forming mold are adopted, and the magnetic material powder is pressed into tile-shaped blanks through step a to step f. When the forming device and the forming method are applied, the problems of demolding difficulty, too low magnetic steel performance, great blank processing quantity, low material utilization rate, blank crack and the like in the tradition tile-shaped blank pressing method are solved.

Description

technical field [0001] The invention belongs to the field of material molding, and in particular relates to a magnetic material powder molding device and method. Background technique [0002] Magnetic materials, such as sintered NdFeB, as an important functional material, have developed rapidly in recent years and are widely used in the field of permanent magnet motors. [0003] Many magnetic materials have uniaxial anisotropy, so when the magnetic material powder is compacted, it is necessary to apply a magnetic field of a certain strength to improve the orientation of the magnet powder. This magnetic field is called the orientation magnetic field, and it is generally believed that the stronger the orientation magnetic field , the better the permanent magnetic performance of the magnet. [0004] The manufacture of permanent magnet motors requires a large number of finished tile-shaped magnets, that is, tile-shaped magnets; at present, during the forming process of tile-sha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/03B22F3/02
Inventor 蔡报贵周铁夫毛华云
Owner JIANGXI JLMAG RARE EARTH
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