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A sintering device with pore size and aperture for the production of NdFeB magnets and its implementation method

A technology of pore size and sintering equipment, which is applied in the field of pore size and aperture sintering equipment for the production of NdFeB magnets, can solve problems such as insufficient stability, cracking, affecting use, etc. Effect

Active Publication Date: 2021-11-30
BAOTOU INST MAGNETIC NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing sintering equipment is to fix the NdFeB magnet workpiece on the support device after processing and shaping, and then put it in the sintering furnace for sintering, reduce the pores between the NdFeB magnet crystals and increase the density between the NdFeB magnet crystals, In order to obtain a polycrystalline dense body to improve the performance of the NdFeB magnet, but the NdFeB magnet workpiece is not stable enough to be placed on the upper end of the support device, and it is prone to fall during the movement process, which affects the use, so it is placed in the fixed groove The bottom of the NdFeB magnet cannot be sintered well, which affects the production quality of the NdFeB magnet; and the existing sintering equipment is not conducive to the heat dissipation of the NdFeB magnet after sintering, and ventilation and cooling may easily lead to its cracking

Method used

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  • A sintering device with pore size and aperture for the production of NdFeB magnets and its implementation method
  • A sintering device with pore size and aperture for the production of NdFeB magnets and its implementation method
  • A sintering device with pore size and aperture for the production of NdFeB magnets and its implementation method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] see Figure 1-4 , a kind of NdFeB magnet production pore size aperture sintering equipment, including a sintering device 1 and a fixing device 2, the fixing device 2 is arranged in the inner cavity of the sintering device 1, and the sintering device 1 includes a support base 11, a sintering cylinder 12, a vacuum pump 13. Pressure gauge 14, end cover 15, observation window 16, power cord 17, and support base 11 are respectively fixedly connected to both sides of the lower end of sintering cylinder 12, and a vacuum pump 13 and a pressure Table 14, and one side of the outer wall at the port of the sintering cylinder 12 is fixedly connected to one end of the end cover 15 through a hinge, and the middle part of the outer wall of the side of the end cover 15 corresponding to the port of the sintering cylinder 12 is provided with an observation window 16, and the inner wall of the observation window 16 The transparent high-temperature-resistant glass is inlaid in between, and ...

Embodiment 2

[0045] see Figure 6 , a sintering equipment with pore size and aperture for the production of NdFeB magnets. The sintering cylinder 12 includes an inner liner 121, a heating coil 122, a heat shield 123 and a protective coating 124. The inner liner 121 is made of a metal material with good thermal conductivity. The finished components are easy to carry out heat conduction sintering on the NdFeB magnet inside the inner lining plate 121 by utilizing its good thermal conductivity, and it is also convenient to use its thermal conductivity to conduct heat dissipation. The outer wall of the inner lining plate 121 is uniformly wound and provided with a heating coil 122, the heating coil 122 is electrically connected to the power line 17, and the outer wrapping of the heating coil 122 is provided with a heat shield 123, and the outer wall of the heat shield 123 is evenly coated with a protective coating 124, and the heat shield 123 will sinter The high temperature inside the cylinder ...

Embodiment 3

[0047] see image 3 and Figure 5 , a kind of sintering equipment with pore size and aperture for the production of NdFeB magnets. The top of the sintering cylinder 12 is provided with a heat dissipation port 111, and the lower end of the heat dissipation port 111 penetrates the protective coating 124 and the heat insulation plate 123 and extends to the outside of the heating coil 122 to dissipate heat. The inner cavity of the port 111 is provided with a heat conduction mechanism 112, and the inner wall of the heat dissipation port 111 port on the top of the heat conduction mechanism 112 is provided with a card slot 113, and a sealing plate 114 is installed in the card slot 113, and the sealing plate 114 passes through the card slot 113. The interference fit seals the top port of the cooling vent 111 , and the sealing plate 114 is a member made of thermal insulation material.

[0048] The heat conduction mechanism 112 includes an arc-shaped plate 1121, a heat-conducting rod 1...

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Abstract

The invention discloses a sintering equipment with pore size and aperture for the production of NdFeB magnets. At the same time, it discloses a method for implementing the sintering equipment for the pore size and aperture of NdFeB magnets. A heat dissipation port is provided on the top of the sintering cylinder to communicate with the sintering tube. Outside the inner lining plate of the cylinder, a heat conduction mechanism is installed on the outer wall of the inner lining plate in the heat dissipation port to conduct heat dissipation to the sintering cylinder. The plate guides the high temperature inside the sintering cylinder, cooperates with the heat conduction rod and the heat dissipation plate to radiate it from the heat dissipation port, and strengthens the cooling effect of the NdFeB magnet. , The horizontal plate and the fixed rod A are provided with clamping arms, the support plate and the pressure plate of the clamp arm clamp the NdFeB magnet workpiece through the cooperation of the sleeve, the spring, the movable block and the vertical rod, and the pressure plate and the support plate are hollowed out shape, which improves the heating area and sintering effect of NdFeB magnets.

Description

technical field [0001] The invention relates to the technical field of sintering equipment, in particular to a sintering equipment with pore size and aperture for the production of NdFeB magnets and an implementation method thereof. Background technique [0002] Neodymium magnets (Neodymi ummagnet), also known as NdFeB magnets (NdFeBmagnet), are tetragonal crystals formed by neodymium, iron, and boron (Nd2Fe14B). In 1982, Masato Sagawa of Sumitomo Special Metals discovered neodymium magnets. The magnetic energy product (BHmax) of this magnet is greater than that of the samarium cobalt magnet, and it is the material with the largest magnetic energy product in the world at that time. Later, Sumitomo Special Metals successfully developed the powder metallurgy process, and General Motors successfully developed the melt-spinning process, which was able to prepare NdFeB magnets. This kind of magnet is the second most magnetic permanent magnet after the absolute zero holmium magn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/057B22F3/10
CPCB22F3/003B22F3/1007H01F1/0577H01F41/0253
Inventor 邱芳
Owner BAOTOU INST MAGNETIC NEW MATERIALS CO LTD