Title:
内面螺旋溝付管の製造方法および内面螺旋溝付管の製造装置
Document Type and Number:
Japanese Patent JP6439222
Kind Code:
B2
Abstract:
A method of producing an inner spiral grooved tube using a first drawing die using first and second drawing dice and a revolving flyer is provided. The method includes a first twisting-drawing step to form an intermediate twisted tube by reducing a diameter of a linear grooved tube, on an inner surface of which a plurality of straight grooves is formed along with a longitudinal direction, in conjunction with imparting twist to the linear grooved tube by passing the linear grooved tube through the first drawing die and then by revolving the liner grooved tube by wrapping the linear grooved tube around the revolving flyer; and a second twisting-drawing step to form an inner spiral grooved tube by reducing a diameter of the intermediate twisted tube by passing the intermediate twisted tube, which revolves with the revolving flyer, through the second drawing die in conjunction with imparting twist to the intermediate twisted tube.
Inventors:
Yusuke Nakaura
Hateruma Yuki
Hateruma Yuki
Application Number:
JP2017520596A
Publication Date:
December 19, 2018
Filing Date:
May 06, 2016
Export Citation:
Assignee:
Mitsubishi Aluminum Co., Ltd.
International Classes:
B21C1/22
Domestic Patent References:
| JP62240108A | ||||
| JP62240109A | ||||
| JP2014142173A |
Attorney, Agent or Firm:
Yasushi Matsunuma
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami