BURRING PROCESSING METHOD, METHOD FOR MANUFACTURING BURRING PROCESSED ARTICLE, DIE FOR BURRING PROCESSING, BURRING PROCESSING DEVICE, AND BURRING PROCESSED ARTICLE

A burring processing method including increasing a diameter of a prepared hole provided in a metal component and bending a part of the metal component to form a burring processed portion (110) including an upright portion (120) and a curved portion (130), wherein in a cross-section that passes throu...

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Bibliographische Detailangaben
Hauptverfasser:	YONEBAYASHI Toru, AZUMA Masafumi, OTSUKA Kenichiro, ITO Yasuhiro
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	A burring processing method including increasing a diameter of a prepared hole provided in a metal component and bending a part of the metal component to form a burring processed portion (110) including an upright portion (120) and a curved portion (130), wherein in a cross-section that passes through an axis (cb) of the burring processed portion (110) and is parallel to the axis (cb) of the burring processed portion (110), a cross-sectional shape of the curved portion (130) on an inner surface of the curved portion consists of a curve, and a length of the curved portion (130) in a direction perpendicular to the axis (cb) of the burring processed portion (110) is at least 1.2 times a height of the curved portion in a direction parallel to the axis (cb) of the burring processed portion (110).