Title:
METHOD, FACILITY AND ROLLING LINE FOR MANUFACTURING SEAMLESSSTELL PIPE
Document Type and Number:
Japanese Patent JPS6289504
Kind Code:
A
Abstract:
In the manufacture of seamless tubes, a billet is heated to rolling temperature, is pierced in a skew rolling stand 7, is stretched into a tubular bloom in a transverse rolling line 14 and rolled out into a finished tube in a finish-rolling line 15. The stretching of the hollow billet into a tubular bloom is carried out in several stages, these stages being carried out simultaneously on the same hollow billet using a transverse rolling method. To do this, the transverse rolling mill 14 does not require a reheating furnace upstream of the finish-rolling process and, with the aid of a rolling-block-type arrangement of a plurality of exchangeable transverse rolling stands, permits particularly large stretching or cross-sectional reduction as entry of the tubular bloom into the finish-rolling line 15 which is disposed at a short distance directly therebeyond.
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Inventors:
ARUBERUTO KUAMUBUTSUSHIYU
HERUMAN MERUTONERU
HERUMAN MERUTONERU
Application Number:
JP23941386A
Publication Date:
April 24, 1987
Filing Date:
October 09, 1986
Export Citation:
Assignee:
KOCKS TECHNIK
International Classes:
B21B19/06; B21B23/00; (IPC1-7): B21B19/06; B21B23/00
Domestic Patent References:
| JP45029901A | ||||
| JPS5014228A | 1975-02-14 | |||
| JPS6192711A | 1986-05-10 |
Attorney, Agent or Firm:
Ezaki Mitsuyoshi
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