Title:
METHOD FOR MANUFACTURING SEAMLESS PIPE
Document Type and Number:
WIPO Patent Application WO/2013/171935
Kind Code:
A1
Abstract:
A method for manufacturing seamless pipe that includes: a step wherein a mandrel is inserted into a hollow billet for processing, by means of casting, into an element pipe having a prescribed diameter and thickness; a step wherein one end of the element pipe is drawn; and a step wherein a metal core is inserted into the element pipe one end of which has been drawn, and a push bench is used to perform punching. By means of this method it is possible to manufacture seamless pipes with a wide range of manufacturability (large-diameter, thick-walled) and with high dimensional precision, and particularly with high wall-thickness precision.
Inventors:
KIHARA TAKAYUKI (JP)
Application Number:
PCT/JP2013/000596
Publication Date:
November 21, 2013
Filing Date:
February 04, 2013
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21C1/26
Foreign References:
| JPS60240332A | 1985-11-29 | |||
| JPS611413A | 1986-01-07 | |||
| JPS63154211A | 1988-06-27 | |||
| JPS5756117A | 1982-04-03 | |||
| JPH0722802A | 1995-01-24 | |||
| JPS56128611A | 1981-10-08 |
Other References:
See also references of EP 2786814A4
Attorney, Agent or Firm:
M. MORI PATENT FIRM (JP)
Patent business corporation Woods Michio patent firm (JP)
Patent business corporation Woods Michio patent firm (JP)
Download PDF:
Previous Patent: DISPLAY DEVICE, DISPLAY CONTROL METHOD AND NON-TEMPORARY COMPUTER-READABLE MEDIUM
Next Patent: DISPLAY DEVICE
Next Patent: DISPLAY DEVICE