Method for finely finishing easy-to-smash and easy-to-rust rare-earth like composite magnet

A composite magnet, rare earth technology, applied in the direction of inorganic material magnetism, etc., can solve the problems of high breakage rate and easy rust

Inactive Publication Date: 2005-12-21
上海三环磁性材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, conventional methods use vibrating optical sieve machines that vibrate up and down, centrifugal optical sieve machines for high-speed rolling grinding, sand shooting machines for sandblasting and grinding in the air, electric erosion processing machines, polishing machines, etc. for finishing, with high crushing rates and easy to rust

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The finished workpieces are ring-shaped bonded rare earth magnets, bonded NdFeB magnets, rare earth iron alloy nitrides, bonded samarium cobalt and bonded magnets containing rare earth elements, for example: (1) In the IT industry ①3. 5-inch to 0.3-inch bonded rare-earth magnets for large and micro hard disk drives, ②bonded rare-earth magnets in CD-ROM, ODD, CD, DV, ③digital products, digital cameras, digital cameras, MP3, PDA, GPS Bonded rare earth magnets in ④ buzzers and speakers, ⑤ bonded rare earth magnets in copiers, printers, scanners, color laser imaging machines, etc.; (2) In the communication industry ① Bonded rare earth magnets in mobile phones, ② bonded rare earth magnets in transmission, control and buzzing systems associated with communications; (4) bonded rare earth magnets in automobiles ① various automotive motors, ② various (4) bonded rare earth magnets in automotive sensors, ③bonded rare earth magnets in transmission and control systems associated wit...

Embodiment 2

[0022] The workpiece to be finished is a ring-shaped bonded rare earth magnet, and its chemical composition is in rare earth elements, transitional elements (iron, cobalt), boron, nitrogen, ZL patent number: 96119267.4; ZL patent number: 96121941.6 patent has been According to public reports, the wall thickness is 0.2-0.4mm;

[0023] The finishing material adopts multi-faceted triangular white corundum abrasive with an average particle size of 1mm, and its shape is spherical or cuboid. The addition amount is 20% of the volume of the container, and the auxiliary agent is a degreasing agent, and the antirust agent: SC600 from Japan Yushiro Company or Shanghai Henkel P3 series main agent unsaturated fatty acid; degreasing agent: Shanghai Henkel S series Japan Yushiro Company The addition amount is 1-3% of the weight of water, and the addition amount of the workpiece to be finished is 5% of the volume of the container;

[0024] The container is rotated, oscillated and vibrated by...

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PUM

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Abstract

Workpieces prepared from composite magnet (including bonded ndfeb magnet etc. and all bonded permanent magnet) to be finished, media, finishing materials and auxiliary agents are put into closed container, which is rotated, or / and swung or / and vibrated under conditions of atmosphere, vacuum or inert gases. The rotating or / and swinging or / and vibrating container makes workpieces, media, finishing materials and auxiliary agents cause friction, wash and impaction among them since they have different densities and move at different directions, so that the workpieces are finished and deburred to reach specified fineness of surface. Motion velocities of workpieces are slowed so as to reduce impulsive kinetic energy and prevent workpieces from breakup. Rust prevention element in media reduces rusted workpieces.

Description

technical field [0001] The present invention relates to a finishing method of a rare earth complex. technical background [0002] Rare earth composite magnets, including bonded NdFeB magnets, bonded NdFeB magnets, bonded NdFeN, bonded samarium cobalt, and any bonded magnets containing rare earth elements, such as: (1) ① 3.5 inches to 0.3 inches large and Bonded rare earth magnets for miniature hard disk drives, ② bonded rare earth magnets in CD-ROM, ODD, CD, DV, ③ digital products, digital cameras, digital cameras, MP3, PDA, GPS bonded rare earth magnets , ④ bonded rare earth magnets in buzzers and speakers, ⑤ bonded rare earth magnets in copiers, printers, scanners, color laser imaging machines, etc.; (2) in the communications industry ① bonded rare earth magnets in mobile phones Magnets, ② bonded rare earth magnets in transmission, control and buzzer systems associated with communication; (3) ① bonded rare earth magnets in various automotive motors in automobiles, ② bonde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/08
Inventor 章祥根赵佑民杜时骏
Owner 上海三环磁性材料有限公司
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