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Title:
METHOD AND APPARATUS FOR CHAMFERING PIPE END PART
Document Type and Number:
Japanese Patent JP2007175890
Kind Code:
A
Abstract:

To provide a chamfering method of a pipe end part capable of certainly chamfering the pipe end part even in a case that the thickness of the pipe end part is deviated or the axis of inner and outer diameter are shifted, and a chamfering apparatus of the pipe end part.

In the chamfering method for pressing the pipe end part 19a of a pipe to be chamfered to the annular groove 24 provided to a mold to chamfer the inner and outer surfaces of the pipe end part 19a at the same time, the annular groove part 24 is formed into a taper shape in a deep direction by the inner peripheral chamfering part 20 provided to an inner chambering mold 18 and the outer chamfering part 21 provided to an outer chamfering mold 14 and the inner chamfering mold 18 is fitted to the outer chamfering mold 14 while at least one of the inner and outer chamfering molds 18 and 14 is provided so as to be made movable in a pipe diameter direction and/or a pipe axial direction with respect to the base 2 for supporting the inner and outer chamfering molds 14 and 18. The annular groove 24 and the pipe end part 19a are arranged so as to be opposed to each other and the inner surface of the pipe end part 19a is pressed to the inner peripheral chamfering part 20 while the outer surface of the pipe end part 19a is pressed to the outer peripheral chamfering part 21 to chamfer the pipe end part 19a.


Inventors:
FURUYA HIROSHI
IWASAKI SHOJI
Application Number:
JP2005373902A
Publication Date:
July 12, 2007
Filing Date:
December 27, 2005
Export Citation:
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Assignee:
SANGO CO LTD
International Classes:
B29C57/00; B21D19/00; B29L23/00
Attorney, Agent or Firm:
Hasegawa Yoshimichi