Title:
継目無管の穿孔圧延方法及び装置
Document Type and Number:
Japanese Patent JP4623212
Kind Code:
B2
Abstract:
[Objective] To provide a method and apparatus for seamless tubes in which the occurrence of material peeling can be prevented even when the skew angle ´ and tube expansion ratio are increased. [Means for solution] A piercing-rolling method for seamless tubes using a piercer, which is provided with a pair of cone-shaped main rolls and a pair of disk rolls, each pair being arranged in an opposing manner with a pass line therebetween as a center axis, and a plug whose center axis coincides with the pass line, wherein a billet to be pierced and rolled is advanced while being spirally rotated by a drive rotation of the main rolls; the method of which is characterized in each of the disk rolls being arranged in an inclined state at a fixed skew angle ´ to the pass line.
Inventors:
Tomio Yamakawa
Kazumune Shimoda
Kazumune Shimoda
Application Number:
JP2008527232A
Publication Date:
February 02, 2011
Filing Date:
July 05, 2007
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21B19/04; B21B23/00
Domestic Patent References:
| JP2005046893A | 2005-02-24 | |||
| JPH1119093A | 1999-01-26 |
Foreign References:
| WO1996021526A1 | 1996-07-18 |
Attorney, Agent or Firm:
Mikiji Sugioka
Terutada Hogami
Chihara
Terutada Hogami
Chihara