TUBE DIAMETER EXPANDING METHOD AND MOLDING APPARATUS

Title:

TUBE DIAMETER EXPANDING METHOD AND MOLDING APPARATUS

Document Type and Number:

WIPO Patent Application WO/2017/158635

Kind Code:

A1

Abstract:

This tube diameter expanding method includes: a step for rotating a tube having one end thereof fixed to a turntable about the center axis of the tube; a step for inserting a rod-like roller extending in the tube axial direction into the tube from the other end of the tube, and bringing the rod-like roller into contact with a molding area extending from a prescribed position to the other end of the tube; a step for heating the molding area of the tube; a step for cooling at least a section near the molding area and located within a non-molding area extending from the prescribed position to the one end of the tube; and a step for moving the rod-like roller in contact with the molding area of the tube, in a direction heading from the one end to the other end of the tube and in a direction heading radially outward of the tube.

Inventors:

IKAWA KEN
IMAMURA YOSHIHIDE
MIKAMI KOHEI
IWASAKI HAYATO
HIRAKAWA TAKEO

Application Number:

PCT/JP2016/001438

Publication Date:

September 21, 2017

Filing Date:

March 14, 2016

Export Citation:

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Assignee:

KAWASAKI HEAVY IND LTD (JP)

International Classes:

B21D41/02; B21C37/18; B21D22/14

Foreign References:

JPH11732A	1999-01-06
JPS298663B1
JP2016013567A	2016-01-28
EP0081700A1	1983-06-22
JP2000246353A	2000-09-12

Other References: