Title:
管の拡径方法および成形装置
Document Type and Number:
Japanese Patent JP6574518
Kind Code:
B2
Abstract:
A tube diameter expanding method includes: rotating a tube having one end fixed to a turntable about a center axis of the tube; inserting a rod-like roller which extends in an axial direction of the tube into the tube from another end of the tube, and bringing the rod-like roller into contact with a forming region extending from the other end to a predetermined position of the tube; heating the forming region of the tube; cooling at least a section located near the forming region and within a non-forming region extending from the predetermined position to the one end of the tube; and moving the rod-like roller in a state of contacting the forming region of the tube, in a direction from the one end of the tube toward the other end of the tube and outward in a radial direction of the tube.
Inventors:
Igawa Ken
Imamura Yoshihide
Kohei Mikami
Hayato Iwasaki
Takeo Hirakawa
Imamura Yoshihide
Kohei Mikami
Hayato Iwasaki
Takeo Hirakawa
Application Number:
JP2018505550A
Publication Date:
September 11, 2019
Filing Date:
March 14, 2016
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
B21D41/02; B21C37/16; B21D22/14
Domestic Patent References:
| JP61067528A | ||||
| JP62062078A | ||||
| JP11000732A | ||||
| JP29008663B1 | ||||
| JP2016013567A |
Foreign References:
| WO2015087752A1 | ||||
| US1983584 | ||||
| EP0081700A1 |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office