Title:
COMPOSITE DIE FOR IMPROVING COLD DRAWING DEFORMATION
Document Type and Number:
WIPO Patent Application WO/2022/099627
Kind Code:
A1
Abstract:
A composite die for improving cold drawing deformation, the composite die comprising a cold drawing outer die body (1), wherein a cold drawing die hole is provided in the cold drawing outer die body (1), and the cold drawing die hole is successively divided into an inlet section (2), a sizing section (3) and an outlet section (4) in the steel pipe drawing direction. The inlet section (2) is formed by means of connecting and combining an arc-shaped guide section (21) and a linear clamping section (22), the linear clamping section (22) and the arc-shaped guide section (21) are arranged tangential to each other, and the diameter of the front end of the inlet section (2) is larger than that of the rear end; the outlet section (4) is of an inverted cone structure; and two ends of the sizing section (3) are respectively connected to the linear clamping section (22) and the outlet section (4). In the composite die, a conical outer die and an arc-shaped outer die are combined into a whole, such that a larger cold drawing deformation is obtained, and passes of cold drawing are reduced, thus the manufacturing cost of steel pipes is reduced.
Inventors:
YANG LIN (CN)
Application Number:
PCT/CN2020/128755
Publication Date:
May 19, 2022
Filing Date:
November 13, 2020
Export Citation:
Assignee:
YANCHENG LIYAN NEW MAT CO LTD (CN)
International Classes:
B21C3/02
Foreign References:
| CN101708507A | 2010-05-19 | |||
| CN203751013U | 2014-08-06 | |||
| CN102606333A | 2012-07-25 | |||
| CN201291240Y | 2009-08-19 | |||
| CN202447407U | 2012-09-26 | |||
| CN104741400A | 2015-07-01 | |||
| JP2011031288A | 2011-02-17 | |||
| JP2000107806A | 2000-04-18 |
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