THICK-WALLED SMALL DIAMETER PIPE PRODUCING METHOD

Title:

THICK-WALLED SMALL DIAMETER PIPE PRODUCING METHOD

Document Type and Number:

WIPO Patent Application WO/2002/074462

Kind Code:

A1

Abstract:

A method of efficiently producing a thick-walled small diameter pipe having a smooth flawless inner peripheral surface, which can be suitably used for a fuel injection pipe for diesel engines, is provided. In producing a thick-walled small diameter pipe by applying a plurality of times of stretching to a seamless raw pipe, the method comprises the steps of cutting the work pipe into lengths for which the product size is taken into consideration, prior to the final stretching, applying cutting or grinding to the inner peripheral surface of such length, and effecting the final stretching by forging utilizing a pressing force provided by a press.

Inventors:

KAMEDA SHIGETSUGU (JP)

Application Number:

PCT/JP2002/002349

Publication Date:

September 26, 2002

Filing Date:

March 13, 2002

Export Citation:

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Assignee:

SANOH IND CO LTD (JP)
KAMEDA SHIGETSUGU (JP)

International Classes:

B23D21/00; B21C1/22; B21C1/24; B21C1/26; B21C37/06; B21C37/30; B24C3/32; F02M55/02; (IPC1-7): B21C1/22

Foreign References:

US5315904A	1994-05-31
US5339513A	1994-08-23
JPH09122795A	1997-05-13

Other References: