Tube expanding method for manufacturing metal tube

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United States of America Patent

PATENT NO 9707614
APP PUB NO 20150114073A1
SERIAL NO

14404241

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Abstract

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Through a tube expanding processing simulation, a workpiece shape in a state where a tip of a workpiece 10 has advanced by 1.0 m or more after passing through a shoulder portion 3 of a tool 1 is evaluated. A hollow piece shape and a tool shape such that the external diameter is within ±1% of the target, the thickness is within ±7.5% of the target, and the internal gap between the hollow piece and the tool is 1.0 mm or less are obtained by repeated calculation, and thereby actual tube expanding manufacturing conditions are determined.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATIONTOKYO 100-0011

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishikawa, Kazutoshi Aichi, JP 45 306
Itakura, Noritsugu Tokyo, JP 7 25
Katsumura, Tatsuro Aichi, JP 23 34
Nambu, Seiichiro Chengdu, CN 1 1

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