Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR ROLLING EXTERNAL PIPE THREADS, ROLLING HEAD AND DEVICE THEREOF
Document Type and Number:
WIPO Patent Application WO/2014/161447
Kind Code:
A1
Abstract:
Disclosed are a method for rolling external pipe threads, a rolling head and a rolling device thereof. A rolling wheel carries out a rolling movement in an axial direction from a thread tail to a thread head relative to a hollow cylindrical blank, and simultaneously, a radial location adjustment device controls the feeding of the rolling wheel in a radial direction, so that the radial feeding of the rolling wheel changes as a function of an axial rolling position, thereby directly forming conical pipe external threads in a rolling processing mode. The rolling head comprises at least one rolling wheel which is arranged along a circumference, and a corresponding rolling wheel shaft and rolling wheel seat, wherein the rolling wheel is rotatably fixed to the rolling wheel seat via the rolling wheel shaft; and a pipe thread forming part is provided on the rolling wheel, and the thread length of the pipe thread forming part is less than the effective thread length of the rolled pipe external threads. Disclosed is a rolling device comprising such a rolling head. Therefore, the end portion of a steel pipe is not easy to deform during rolling, the material of the hollow cylindrical blank is significantly saved, and the yield is improved.

Inventors:
ZHOU JUN (CN)
Application Number:
PCT/CN2014/074354
Publication Date:
October 09, 2014
Filing Date:
March 31, 2014
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SHANGHAI PAN CHINA FASTENING SYSTEM CO LTD (CN)
International Classes:
B21H3/04
Foreign References:
CN103521666A2014-01-22
RU2277990C12006-06-20
CN102423789A2012-04-25
CN1480666A2004-03-10
CN101209523A2008-07-02
JP2002126845A2002-05-08
JP2000061571A2000-02-29
US3855832A1974-12-24
CN200310111695A2003-12-31
CN200710106912A2007-05-14
US5699691A1997-12-23
US3058196A1962-10-16
EP0282889A21988-09-21
US3452567A1969-07-01
US20060162411A12006-07-27
JPH1034270A1998-02-10
JPH10244340A1998-09-14
JP2003126937A2003-05-08
JPH0527742A1993-02-05
CN100542735C2009-09-23
CN2555962Y2003-06-18
CN103264128A2013-08-28
CN103286245A2013-09-11
SU1344479A11987-10-15
US20120011912A12012-01-19
US4617816A1986-10-21
US4785649A1988-11-22
US5870918A1999-02-16
GB1150525A1969-04-30
JPH01273637A1989-11-01
SU703197A11979-12-15
US4771625A1988-09-20
CN102198590A2011-09-28
CN202316603U2012-07-11
CN1251821C2006-04-19
Other References:
See also references of EP 2982457A4
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
上海专利商标事务所有限公司 (CN)
Download PDF: