Title:
ドライブシャフト用継目無鋼管
Document Type and Number:
Japanese Patent JP4315154
Kind Code:
B2
Abstract:
A steel tube hot-finished by the Mannesmann tube-making method is subjected to a simple grinding process for the inner surface, and thereafter to a cold drawing, so that the depth d of the concave portion in the concavo-convex profile forming the inner surface of the steel tube, the surface roughness Ra and the width w of the entrance in the concave portion are specified, or similarly the depth d of the concave portion in the concavo-convex profile, the Vickers hardness Hv of the inner surface layer and the width w of the entrance in the concave portion are specified, hollow parts for a drive shaft, which have an excellent fatigue strength and which is optimal to reduce the weight of a car body, can be produced. Accordingly, the application of the manufacturing method according to the present invention allows drive shafts for automobiles to be efficiently produced in a reduced manufacturing cost, thereby providing a significant advantage in the industry.
More Like This:
WO/2017/135598 | DRAWING PLUG |
Inventors:
Koichi Kuroda
Tatsuya Okui
Keisuke Ichiiri
Tatsuya Okui
Keisuke Ichiiri
Application Number:
JP2005504938A
Publication Date:
August 19, 2009
Filing Date:
January 28, 2004
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21C1/24; B21B17/02; B21B17/14; B21B23/00; B60G9/00; B21B19/04; B21B27/02
Domestic Patent References:
JP2002361319A | ||||
JP2822849B2 | ||||
JP1122608A | ||||
JP7016616A |
Attorney, Agent or Firm:
Michio Mori