BURRING PROCESSING METHOD, METHOD FOR MANUFACTURING BURRING PROCESSED PRODUCT, BURRING PROCESSING MOLD, BURRING PROCESSING DEVICE, AND BURRING PROCESSED PRODUCT
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United States of America Patent
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Issued Date -
Aug 3, 2023
app pub date -
Jul 9, 2021
filing date -
Jul 9, 2020
priority date (Note) -
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Abstract
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 buffing 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).
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