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Patent Searching and Data


Title:
MANUFACTURE OF BOTTOMED METALLIC PIPE
Document Type and Number:
Japanese Patent JPH01215427
Kind Code:
A
Abstract:

PURPOSE: To manufacture a bottomed metallic pipe at a low cost by forming a recess on one end face of a columnar metallic blank, filling this surface with lubricant, then, carrying out cold extrusion with a punch having a specified shape.

CONSTITUTION: After all the surface of a columnar metallic blank 1 is treated with lubricant, the recess 5 is preformed. Then, powdery lubricant 6 is mounted fully on this surface and then cold extrusion is performed by a punch 7. In this case, it is preferred that the tip of the part of a diameter D of the punch 7 has a flat surface 9 having a diameter over 0.3×D, the shoulder part 10 of the punch 7 has a corner radius over 0.1×D and the punch has tip angles α160W180°. In this way, the bottomed metallic pipe free from seizure can be manufactured at a low cost.


Inventors:
TAKAHASHI WATARU
Application Number:
JP4043788A
Publication Date:
August 29, 1989
Filing Date:
February 23, 1988
Export Citation:
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Assignee:
SUMITOMO METAL IND
International Classes:
B21C23/18; B21J3/00; B21J5/06; B21K21/00; (IPC1-7): B21C23/18; B21J3/00; B21J5/06; B21K21/00
Attorney, Agent or Firm:
Shoichi Hirose (1 person outside)