Title:
METHOD FOR FORMING ROLLING TAPER SCREW TO METAL PIPE
Document Type and Number:
Japanese Patent JP2015013293
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To safely manufacture a taper screw of a shape as designed.SOLUTION: A process of forming a rolling taper screw is the process of forming a rolling taper screw 33 at an end part of a metal pipe 30 with a rolling roller 10 and makes the metal pipe 30 and the rolling roller 10 relatively move. The rolling roller 10 has a plurality of threads aligned at a predetermined pitch. In the process of forming the rolling taper screw 33, the metal pipe 30 and the rolling roller 10 relatively move in the pipe axial direction Y of the metal pipe 30 as it keeps a contact with the rolling roller 10 under relative rotation as viewed from the metal pipe 30. This process is characterized in that a movement distance of the rolling roller 10 in the pipe axial direction Y as viewed from the metal pipe 30 while the rolling roller 10 turns around the metal pipe 30 is smaller than the pitch of the threads of the rolling roller 10.
Inventors:
INOUE MASACHIKA
HIGASHIKAWA RYUICHI
YAMANO ATSUSHI
HIGASHIKAWA RYUICHI
YAMANO ATSUSHI
Application Number:
JP2013139504A
Publication Date:
January 22, 2015
Filing Date:
July 03, 2013
Export Citation:
Assignee:
JFE PIPE FITTING MFG CO LTD
International Classes:
B21H3/04
Domestic Patent References:
| JPS6316826A | 1988-01-23 | |||
| JPH06179030A | 1994-06-28 | |||
| JPH0314035U | 1991-02-13 | |||
| JPH026131U | 1990-01-16 |
Foreign References:
| US4785649A | 1988-11-22 |
Attorney, Agent or Firm:
Shoji Suzue
Tetsuro Yoshimura
Tetsuro Yoshimura