Title:
内面溝付管の製造装置
Document Type and Number:
Japanese Patent JP4550226
Kind Code:
B2
Abstract:
The present invention is an apparatus for manufacturing an internal grooved tube, in which has a rotary die and a working head having a plurality of balls retained inside in such a way as to rotate with play are provided along the drawing direction of a metal blank tube in order and in such a way as to rotate separately, which is constructed in such a way that multiple grooves are formed in the internal surface of the metal blank tube by pressing the metal blank tube where a plug and a grooved plug rotatably coupled to the plug are inserted against the outer surface of the grooved plug as the metal blank tube is put through the rotary die and the working head and drawn, and which has lubricating-oil feeding units and separatedly provided at upstream sides of the rotary die and the working head.
Inventors:
Sumitomo Tetsuya
Takashi Yamamoto
Toshiaki Hashizume
Takashi Yamamoto
Toshiaki Hashizume
Application Number:
JP2000169276A
Publication Date:
September 22, 2010
Filing Date:
June 06, 2000
Export Citation:
Assignee:
THE FURUKAW ELECTRIC CO.,LTD.
International Classes:
B21C1/22; B21D17/00; B21C1/24; B21C3/16; B21C37/20; B21D53/06; B21H3/08
Domestic Patent References:
| JP5007919A |
Attorney, Agent or Firm:
Makoto Kono
Kogo Kogo
Kogo Kogo