Title:
MANUFACTURING METHOD FOR COMPOUND SCREW AND MANUFACTURING PROGRAM FOR COMPOUND SCREW
Document Type and Number:
WIPO Patent Application WO/2017/078174
Kind Code:
A1
Abstract:
Provided is a manufacturing method for a compound screw having a first thread groove and a second thread groove with a different lead angle or lead direction from the first thread groove, wherein at least a portion of the first thread groove is formed by feeding a cutting tool that acts on a workpiece a first feed amount toward the workpiece, the workpiece being a rotating object to be machined. Additionally, at least a portion of the second thread groove is formed by feeding the cutting tool that acts on the workpiece a second feed amount that differs from the first feed amount. With these steps, a compound thread portion is formed in the workpiece. As a result, it is possible to mass produce a compound screw having two thread structures of differing lead angles and/or lead directions with a high level of quality.
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Inventors:
MICHIWAKI HIROSHI (JP)
Application Number:
PCT/JP2016/082921
Publication Date:
May 11, 2017
Filing Date:
November 07, 2016
Export Citation:
Assignee:
NEJILAW INC (JP)
International Classes:
B23Q15/00; B23G3/00; G05B19/18
Foreign References:
JPS53122995A | 1978-10-26 | |||
JPH0655342A | 1994-03-01 | |||
JP2008272925A | 2008-11-13 | |||
JP2014087888A | 2014-05-15 | |||
JPS63278716A | 1988-11-16 |
Other References:
See also references of EP 3372332A4
Attorney, Agent or Firm:
SAHARA Masashi et al. (JP)
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