Title:
OPERATION METHOD OF APPARATUS FOR CONTINUOUSLY MANUFACTURING STEEL TUBE
Document Type and Number:
Japanese Patent JP3649138
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an operation method of an apparatus for continuously manufacturing a steel tube, by which the lowering of the yield of a base stock and productivity and the damage of rolls are more suppressed than heretofore even when abnormality and trouble occur in respective apparatuses arranged on the manufacturing line.
SOLUTION: When manufacturing the steel tube by the apparatus for continuously manufacturing the steel tube, which is provided with respective apparatuses of an uncoiler for steel strips, a heating furnace for heating the steel strip to a specified temperature, a forming roll group for forming the steel strip into a tubular body, an edge heating apparatus for preheating the butting parts, squeeze rolls for butting and joining the butting parts to obtain a shell, a soaking pit for reheating the shell after joining to specified temperature, a stretch reducer for making the heated shell into the inside and outside diameters of a product and a hot saw for cutting the shell after rolling, a flying shear is provided between the squeeze roll and the soaking pit to detect the abnormality or the trouble of each apparatus which occur during operation on the basis of the position, thus the operation of each apparatus is stopped of decelerated in accordance with the position where the abnormality or the trouble occurs.
Inventors:
Kingo Sawada
Karakama Katsunori
Karakama Katsunori
Application Number:
JP2001071338A
Publication Date:
May 18, 2005
Filing Date:
March 14, 2001
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B21C51/00; B21C37/06; B21C37/08; (IPC1-7): B21C37/06; B21C37/08; B21C51/00
Domestic Patent References:
| JP60170582A | ||||
| JP11077140A | ||||
| JP10005855A |
Attorney, Agent or Firm:
Yoshio Kosugi
Masaki Yamada
Masaki Yamada