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Title:
CORELESS SPINNING MACHINING METHOD FOR LARGE-PROPORTION MULTI-VARIABLE-DIAMETER HOLLOW SHAFT
Document Type and Number:
WIPO Patent Application WO/2021/051695
Kind Code:
A1
Abstract:
Disclosed is a coreless spinning machining method for a large-proportion multi-variable-diameter hollow shaft (100), the method comprising the following steps: S1, using a vertical spinning system to clamp a blank in a lower die unit (500), the lower die unit driving a workpiece to rotate, and a rough spinning roller (200) and a fine spinning roller (300) on two sides of the workpiece being in contact with the workpiece at the same time to conduct staggered spinning, and conducting curve back-and-forth feed spinning in a point contact manner to form a roughly-spun blank; S2, moving the rough spinning roller and the fine spinning roller, shaping spinning rollers (400) on the two sides of the workpiece being in contact with the workpiece to conduct shaping spinning, and the shaping spinning rollers on the two sides conducting linear contact shaping fine spinning only in a radial direction so as to obtain a finely-spun blank; and S3, respectively conducting spinning machining at positions, needing to be machined, on the workpiece according to the above manner so as to obtain a rough blank. The product prepared by using the method is high in precision, such that the subsequent machining allowance can be reduced, the material utilization rate is high, and the production cost is reduced.

Inventors:
SUN GUOFENG (CN)
HAN LIANG (CN)
LI XIAOFENG (CN)
Application Number:
PCT/CN2019/127336
Publication Date:
March 25, 2021
Filing Date:
December 23, 2019
Export Citation:
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Assignee:
WUHU SANLIAN FORGING CO LTD (CN)
International Classes:
B21D22/16
Foreign References:
CN210523513U2020-05-15
CN110548797A2019-12-10
DE3221899A11983-12-08
CN207188564U2018-04-06
CN207447050U2018-06-05
CN108311577A2018-07-24
JP2007283366A2007-11-01
Attorney, Agent or Firm:
WEN PARTNERS, P.C. (CN)
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