Title:
A manufacturing method and a manufacture device of an inside spiral grooved tube
Document Type and Number:
Japanese Patent JP6169538
Kind Code:
B2
Abstract:
A method includes: the step of sending a raw tube (11) from a drum (21) to an unwinding side capstan (22) while the raw tube (11) is rotated around a central axis (C) perpendicular to a winding shaft (21a) of the drum (21) by rotating the drum (21) and the unwinding side capstan (22) about the central axis (C) concurrently with unwinding of the raw tube (11) from the drum (21) holding the raw tube (11), on an inner surface of which multiple straight grooves along a longitudinal direction of the raw tube are formed with an interval in a circumferential direction, in a coil shape, to wind the raw tube (11) around the unwinding side capstan (22); and the step of drawing in which the unwound raw tube (11) is drawn while the diameter of the raw tube (11) is reduced, and then the raw tube (11) is wound around the drawing side capstan (25) to twist the raw tube (11) and obtain an inner spiral grooved tube (11R).
Inventors:
Yusuke Nakaura
Takeshi Sakagami
Hateruma Yuki
Takeshi Sakagami
Hateruma Yuki
Application Number:
JP2014148340A
Publication Date:
July 26, 2017
Filing Date:
July 18, 2014
Export Citation:
Assignee:
Mitsubishi Aluminum Co., Ltd.
International Classes:
B21C1/22; B21C23/10; B21C37/20; B21C47/20; B21C47/26; B21D11/14
Domestic Patent References:
| JP58167030A | ||||
| JP59209430A | ||||
| JP10166086A | ||||
| JP2012236225A |
Foreign References:
| US2250610 |
Attorney, Agent or Firm:
Masatake Shiga
Mitsuo Teramoto
Yasushi Matsunuma
Fumihiro Hosokawa
Kazunori Onami
Mitsuo Teramoto
Yasushi Matsunuma
Fumihiro Hosokawa
Kazunori Onami