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Patent Searching and Data


Title:
EXTRUSION METHOD FOR MANUFACTURING CONICAL BUSHING
Document Type and Number:
WIPO Patent Application WO/2018/090309
Kind Code:
A1
Abstract:
Provided is an extrusion method for manufacturing a conical bushing, comprising: a press moving downward to press a first upper die, extruding the upper end of a first steel tube from a die bushing to pass through the inner cavity of the first upper die and extend into a second steel tube; placing the second upper die onto the first upper die, and the press moving downward to extrude the upper end of the first steel tube; placing a third upper die above the second upper die, and the press moving downward to extrude the upper end of the first steel tube; connecting a first lower die below the die bushing, the press moving downward, and the first lower die extruding the lower end of the first steel tube; placing a second lower die below the first lower die, the press moving downward to extrude the lower end of the first steel tube to obtain a conical bushing. This manner of extrusion is convenient to operate and production efficiency is high.

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Inventors:
CAI WEIDONG (CN)
GE JUNXU (CN)
WANG HAIFENG (CN)
WANG JIAN (CN)
YANG GENSHAN (CN)
Application Number:
PCT/CN2016/106329
Publication Date:
May 24, 2018
Filing Date:
November 18, 2016
Export Citation:
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Assignee:
NANTONG CHANG RONG ELECTROMECHANICAL CO LTD (CN)
International Classes:
B21C23/01
Foreign References:
CN105689423A2016-06-22
CN1817554A2006-08-16
CN101712108A2010-05-26
US5511440A1996-04-30
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