METHOD FOR MANUFACTURING ANNULAR MEMBER

Provided is a method for manufacturing an annular member with good yield and with high dimensional accuracy. Therefore, the method includes: a cylindrical member forming step of forming a cylindrical member (4) with an annular shape from a round bar material (1); and a cutting and separating step of...

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Bibliographische Detailangaben
Hauptverfasser:	KOBAYASHI, Kazuto, YASUDA, Yuu
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING
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Beschreibung
Zusammenfassung:	Provided is a method for manufacturing an annular member with good yield and with high dimensional accuracy. Therefore, the method includes: a cylindrical member forming step of forming a cylindrical member (4) with an annular shape from a round bar material (1); and a cutting and separating step of cutting and separating the cylindrical member (4) over an axial direction of the cylindrical member (4) while rotating the cylindrical member (4), the cylindrical member (4) being cut and separated by a shear force obtained by restraining molds (14a, 14c), which apply an urging force to an outer circumferential surface of the cylindrical member (4), and by a restraining mold (14b), which is provided with a gap on the outer circumferential surface of the cylindrical member (4), among a plurality of restraining molds (14, 15) provided on an inner circumferential surface side and an outer circumferential surface side of the cylindrical member (4) along the axial direction, to obtain a plurality of annular members (5).