Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and equipment for producing thermal deformation magnetic body

A technology of thermal deformation and equipment, applied in the direction of inductance/transformer/magnet manufacturing, electrical components, circuits, etc., can solve problems such as low efficiency

Active Publication Date: 2018-06-05
ROBERT BOSCH GMBH +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing heat-deformable magnets are usually prepared through two steps of hot-pressing process and heat-deformation process. The hot-pressing process is carried out by cold pressing and heating. Only one preform can be produced at a time, which is inefficient and requires a high production efficiency. to improve

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and equipment for producing thermal deformation magnetic body
  • Method and equipment for producing thermal deformation magnetic body
  • Method and equipment for producing thermal deformation magnetic body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] hot pressing

[0069] figure 1 Shown is a schematic diagram of the hot pressing process of this embodiment.

[0070] Put the commercially available MQU-F magnetic powder into the package, suck out the air in the package, seal the package, and then put the package containing the quick-quenching powder into the pressure-resistant container of the hot-pressing device. Vacuumize the pressure vessel to less than 6×10 -2 Pa, and then use argon to implement hot isostatic pressing, in which heating is carried out at a heating rate of about 8°C / min, during which the pressure is gradually increased. After the temperature reaches 650°C and the pressure reaches 147MPa, it is kept for 45 minutes. Then turn off the heating system and pressurization system. The package containing the preform is cooled by an argon flow, and after the temperature is lower than 200° C., the package is taken out and opened to obtain a preform. The preform is cut with a wire saw to fit the dimensions...

Embodiment 2

[0075] image 3 Shown is a schematic diagram of the thermal deformation process of this embodiment.

[0076]In this embodiment, the hot pressing process and the hot deformation process are implemented in a similar manner to Example 1, the difference is that during the demoulding process of the hot deformation process, the two extrusion heads move in the same direction together with the hot deformation magnet until the hot The deformed magnet is pushed out of the heat-deformed mold, and finally the heat-deformed magnet is taken out.

Embodiment 3

[0078] Figure 4 Shown is a schematic diagram of the thermal deformation process of this embodiment.

[0079] In this example, the hot-pressing process and the hot-deformation process are carried out in a similar manner to Example 1, except that bidirectional extrusion is continued after upsetting, so that lateral extrusion is carried out immediately through a discharge port.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method and equipment for producing a thermal deformation magnetic body. The method comprises the steps that in a thermocompression process, thermocompression is carried outon rapid quenching powder so as to obtain a preformed blank; and in a thermal deformation process, thermal deformation is carried out on the preformed blank so as to obtain the thermal deformation magnetic body.

Description

technical field [0001] The present invention relates to a method and an apparatus for producing a heat-deformable magnet, wherein during the hot-pressing process, quenched powder is subjected to hot isostatic pressing to obtain a preform; and during the heat-deformation process, said preform is subjected to heat-deformation to obtain thermally deformable magnets. Background technique [0002] Rare earth / iron / boron-based permanent magnets are widely used in household appliances, electric tools, wind power generation, pure electric vehicles / hybrid vehicles and other fields. Compared with sintered and bonded magnets, thermally deformable rare earth / iron / boron based magnets can maintain excellent magnetic properties without or with lower contents of heavy rare earth elements such as Dy and Tb due to their nanostructured microstructure Especially compared with sintered magnets, it has better temperature stability. In addition, because it is different from the sintering process, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22F3/20B22F3/15H01F41/02
CPCH01F41/0266B22F3/003B22F3/15B22F3/20B22F2998/10B22F2003/208
Inventor 陈仁杰尹文宗靳朝相唐旭喻家庆陈必成
Owner ROBERT BOSCH GMBH