Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD AND APPARATUS FOR TUBE GROOVING
Document Type and Number:
Japanese Patent JP2001232423
Kind Code:
A
Abstract:

To easily and precisely form a groove in axial direction of a tube.

A mandrel is inserted into at least a section to be worked of a tube, and the tube and the mandrel are held so that they do not move relatively. The tube and a die are relatively moved in the axial direction so that the tube is inserted into the die. A plastic flow is caused in tube material by a protrusion part 7 protruded from the die 5 to form a groove in the axial direction of the tube on the surface of the tube. A working face 10 of a front edge of the protrusion part 7 is inclined to have a sweepback angle for a relative advancing direction as well as is formed to a projecting curved face in the relative advancing direction, the plastic flow of material is promoted in the center direction and peripheral direction of the tube.


Inventors:
Watabe, Tetsuya
Irie, Toru
Morikawa, Akinobu
Application Number:
JP2000000046863
Publication Date:
August 28, 2001
Filing Date:
February 24, 2000
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SANGO CO LTD
International Classes:
B23P13/00; B21D17/00; (IPC1-7): B21D17/00; B23P13/00
Attorney, Agent or Firm:
長谷川 好道