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Title:
METHOD FOR FORMING HOLLOW MOTOR SHAFT
Document Type and Number:
WIPO Patent Application WO/2022/213991
Kind Code:
A1
Abstract:
A method for forming a hollow motor shaft, comprising the following steps: step S1, obtaining a bar meeting part requirements; step S2, manufacturing the bar into a pipe blank; step S3, performing primary heat treatment on the pipe blank, and obtaining a pipe material of a required length; step S4, preprocessing an outer circle of the pipe material; step S5, performing rotary swaging on the pipe material to obtain a variable-diameter multi-step hollow rotor shaft blank; step S6, performing primary machining on the hollow rotor shaft blank; step S7, performing secondary heat treatment on the hollow rotor shaft blank; step S8, performing secondary machining on the hollow rotor shaft blank to form a hollow rotor shaft; and step S9, performing finished product detection on the hollow rotor shaft. The method for forming the hollow motor shaft can manufacture a hollow rotor shaft meeting requirements, thereby shortening a manufacturing procedure of a part, improving the manufacturing efficiency, saving the cost, and improving the utilization rate of a material.

Inventors:
YANG XIANGDONG (CN)
QIAO YANYAN (CN)
PAN ZHICHENG (CN)
DAI ZEHUA (CN)
Application Number:
PCT/CN2022/085346
Publication Date:
October 13, 2022
Filing Date:
April 06, 2022
Export Citation:
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Assignee:
PACIFIC PREC FORGING CO LTD (CN)
PACIFIC PREC POWERTRAIN CO LTD (CN)
International Classes:
B21J5/00; B21J1/02; B21J1/06; B21K1/06
Foreign References:
CN113477857A2021-10-08
CN113084467A2021-07-09
CN110900122A2020-03-24
CN111318863A2020-06-23
CN112238205A2021-01-19
DE102015221842A12017-05-11
Attorney, Agent or Firm:
NANJING TIANHUA PATENT AGENT CO., LTD. (CN)
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