Method for cutting rare earth alloy with scroll saw and method for producing rare earth alloy plate

A wire saw and rare earth technology, which is applied in the manufacture of tools, metal sawing equipment, inductors/transformers/magnets, etc., can solve the problems of impracticability, wire breakage, and reduced cutting accuracy, and achieve sufficient and effective separation.

Inactive Publication Date: 2003-08-20
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, there has been no report on cutting rare earth alloys with a practical wire saw technology.
According to the experiments of the present inventors, if the raw material of the rare earth alloy is cut with a wire saw, the fine powder and grinding debris (swarf or sludge) generated by the wire saw will be cut off in a very short time. The slurry circulation pipe is blocked, and as a result, the slurry cannot be supplied to the wire saw, and the wire is broken.
In order to avoid this problem, if the entire slurry is completely replaced every few hours, the processin

Method used

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  • Method for cutting rare earth alloy with scroll saw and method for producing rare earth alloy plate
  • Method for cutting rare earth alloy with scroll saw and method for producing rare earth alloy plate
  • Method for cutting rare earth alloy with scroll saw and method for producing rare earth alloy plate

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Embodiment Construction

[0040] Next, an example of the method for producing the rare earth alloy sheet of the present invention will be described. In this embodiment, a ternary system compound Nd-Fe-B mainly composed of neodymium (Nd), iron (Fe) and boron (B) is used as a rare earth alloy, or Dy (dysprosium) is used to replace Nd- A compound in which a part of Nd in Fe-B is replaced with Co (cobalt) for a part of Fe. As we all know, Nd-Fe-B is the largest energy product over 320ks / m 3 Strong neodymium magnet material.

[0041] Refer below figure 1 The flow chart briefly illustrates the production method of the Nd-Fe-B blank. A method for producing a rare earth alloy as a magnet material is described in detail in, for example, US Patent No. 4,770,723.

[0042] First, in figure 1 After accurately weighing the raw materials according to the set composition ratio in step S1, the raw materials are melted in a vacuum or argon atmosphere high-frequency melting furnace in step S2. The molten raw materi...

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Abstract

A method for cutting a rare earth alloy according to the present invention includes the steps of: a) supplying slurry containing abrasive grains onto a wire; and b) machining the rare earth alloy with the abrasive grains, interposed between the wire and the rare earth alloy, by running and pressing the wire against the rare earth alloy. The slurry contains, as a main component, oil in which the abrasive grains are dispersed, and the viscosity of the slurry at 25 DEG C is in the range from 92 to 175 mPa . sec.

Description

technical field [0001] The present invention relates to a method of cutting a rare earth alloy with a wire saw, a method of manufacturing a rare earth alloy plate, a method of manufacturing a rare earth alloy magnet, and a voice coil motor having the rare earth alloy magnet. Background technique [0002] Japanese Unexamined Patent Application Publication No. 6-8234 reports the development of a technique of cutting an ingot with a wire saw in order to cut out a plurality of sheets from a silicon ingot. According to this technology, the blank is cut and cut while feeding the slurry containing abrasives to the moving multiple steel wires, and multiple sheets of a certain thickness can be cut at the same time. [0003] On the other hand, as a method of cutting a rare earth alloy billet, a technique of thinly cutting the billet with a rotating scribing plate has been used. However, in the method of cutting with a reticle, since the thickness of the cutting edge is larger than th...

Claims

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Application Information

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IPC IPC(8): B24B27/04B22F5/00B23D57/00B28D1/02B28D5/00H01F41/02H02K41/035
CPCB28D5/007B28D1/025H01F41/0253B22F5/003B28D5/0082B23D57/0053H02K41/0354Y10T29/49995Y10T83/9292Y02P70/10B24B27/04
Inventor 竹马正则石田一
Owner HITACHI METALS LTD
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