Title:
VARIABLE-CHANNEL CORNER SELF-BENDING EXTRUSION DIE, AND DESIGN, MANUFACTURING AND EXTRUSION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/248748
Kind Code:
A1
Abstract:
Disclosed are a variable-channel corner self-bending extrusion die, and a design, manufacturing and extrusion method thereof, relating to the technical field of dies. The method comprises the following steps: designing a symmetric streamlined extrusion die based on a sine function; enabling the central axis of a die cavity (11) of the symmetric streamlined extrusion die to be distorted and deformed on a certain plane; establishing a wall surface equation of the die cavity (11) of the variable-channel corner self-bending extrusion die; additionally arranging a working belt structure (12) behind the die cavity (11) of the variable-channel corner self-bending extrusion die; and after metal flows through the variable-channel corner self-bending extrusion die, controlling the extrusion speed to be linearly distributed, such that a bent part is directly extruded. Therefore, a sectional material is not subjected to transverse torque, such that section deformation of an outer side face of the sectional material is reduced or completely eradicated; flowing of the metal in the extrusion process is smoother than that of a traditional stepped extrusion die, and the extrusion load is reduced; and the technical problems of springback, wrinkling and section deformation in the bending process of a sectional material in the prior art are relieved, and the technical problem of reducing a load during extrusion is relieved.
Inventors:
ZHU GUANGMING (CN)
MIN FANLEI (CN)
CHANG ZHENG (CN)
LIU HUIPING (CN)
MIN FANLEI (CN)
CHANG ZHENG (CN)
LIU HUIPING (CN)
Application Number:
PCT/CN2020/118504
Publication Date:
December 16, 2021
Filing Date:
September 28, 2020
Export Citation:
Assignee:
UNIV SHANDONG TECHNOLOGY (CN)
International Classes:
B21C23/12
Foreign References:
| CN111644478A | 2020-09-11 | |||
| CN109967549A | 2019-07-05 | |||
| CN109382417A | 2019-02-26 | |||
| CN104874631A | 2015-09-02 | |||
| CN106378362A | 2017-02-08 | |||
| CN202591379U | 2012-12-12 | |||
| SU1657248A1 | 1991-06-23 | |||
| CN103678772A | 2014-03-26 | |||
| CN108421839A | 2018-08-21 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
Download PDF: