Title:
MANUFACTURING METHOD OF PUNCHED MATERIAL
Document Type and Number:
Japanese Patent JP2020116589
Kind Code:
A
Abstract:
To provide a manufacturing method of a punched material which can efficiently manufacture the punched material composed of a nanocrystal-system soft magnetic material.SOLUTION: A manufacturing method of a punched material 10a includes: a preheating process for heating a band-shaped metal sheet 10 composed of an amorphous-system soft magnetic material to a temperature lower than a crystallization temperature at which the amorphous-system soft magnetic material starts to be crystallized; a heating punching process for heating the punched material 10 by punching the preheated metal sheet 10 by a rotary die cutter 3 while heating the metal sheet to the crystallization temperature or higher; and a heat treatment process for crystallizing the punched material 10a to a nanocrystal-system soft magnetic material from the amorphous-system soft magnetic material by heating the punched material 10 to the crystallization temperature or higher by the heat of the rotary die cutter 3.SELECTED DRAWING: Figure 1
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Inventors:
SHIMAMOTO NOBORU
TOMIOKA AKINORI
SUKEDA TAKUYA
TOMIOKA AKINORI
SUKEDA TAKUYA
Application Number:
JP2019007773A
Publication Date:
August 06, 2020
Filing Date:
January 21, 2019
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
B21D28/02; B21D28/12; B21D37/16; C21D6/00; C22F1/10; H01F1/153; H01F41/02
Attorney, Agent or Firm:
Hiraki International Patent Office