METHOD FOR REPAIRING SOLID BAR EXTRUSION DIE

WIPO Patent Application WO/2023/103921

A1

Disclosed in the present invention is a method for repairing a solid bar extrusion die, comprising: (1) performing extrusion by using an original extrusion die to obtain a sample plate; (2) detecting the distribution condition of coarse grain rings of the sample plate; and (3) repairing the extrusion die according to the distribution condition of the coarse grain rings; when the coarse grain rings are annularly distributed and when a maximum thickness tmax of the coarse grain rings is greater than or equal to 0.2 D, regulating the composition of an aluminum alloy and a heat treatment process; when the coarse grain rings are annularly distributed and when the maximum thickness tmax of the coarse grain rings is less than 0.2 D, forming welding blocks on a surface die of the extrusion die; and when the coarse grain rings are locally distributed, shortening the length of a working belt of the extrusion die. By implementing the present invention, the uniformity of the internal tissue of a product can be effectively improved, and the coarse grain rings are reduced.

YAN LANFANG (CN)
ZOU SHANGFENG (CN)
LI YONGCHAO (CN)
CHEN JIAN (CN)
CHEN LI (CN)

PCT/CN2022/136410

June 15, 2023

December 03, 2022

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GUANGDONG JMA ALUMINUM PROFILE FACTORY GROUP CO LTD (CN)
FOSHAN JMA ALUMINIUM IND CO LTD (CN)

B23P6/00

CN114310141A	2022-04-12
CN106756345A	2017-05-31
CN105256193A	2016-01-20
CN106011564A	2016-10-12
CN112642875A	2021-04-13
CN204220659U	2015-03-25
JP2006057123A	2006-03-02

SCIHEAD IP LAW FIRM (CN)

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