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Title:
MAIN-SHAFT SPEED CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/185993
Kind Code:
A1
Abstract:
Provided is a main-shaft speed adjustment device (1) provided with: a vibration detection unit (acceleration sensor) (2) for detecting vibration of a tool; a chatter detection unit (4) for monitoring a detection signal of the vibration detection unit (2) for the presence or absence of regenerative chatter; and a rotational speed adjustment unit (5) that, upon receipt of a detection signal from the chatter detection unit (4), transmits to a numerical control device (10) a speed adjustment signal for increasing or reducing the main-shaft speed at a prescribed time interval and with a prescribed amount of change. Every time the speed adjustment signal is transmitted, the rotational speed adjustment unit (5) detects whether regenerative chatter can be resolved, and if it has been detected that the regenerative chatter cannot be resolved, the rotational speed adjustment unit terminates cutting, terminates the adjustment of the main-shaft speed, and/or makes an announcement to the effect that the regenerative chatter cannot be resolved.

Inventors:
ONO, Katsuhiko (106 Kitakoriyama-cho, Yamatokoriyama-sh, Nara 60, 〒6391160, JP)
NISHIKAWA, Shizuo (106 Kitakoriyama-cho, Yamatokoriyama-sh, Nara 60, 〒6391160, JP)
SAKAMOTO, Masataka (106 Kitakoriyama-cho, Yamatokoriyama-sh, Nara 60, 〒6391160, JP)
KAWAI, Kengo (106 Kitakoriyama-cho, Yamatokoriyama-sh, Nara 60, 〒6391160, JP)
Application Number:
JP2018/001000
Publication Date:
October 11, 2018
Filing Date:
January 16, 2018
Export Citation:
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Assignee:
DMG MORI CO., LTD. (106 Kitakoriyama-cho, Yamatokoriyama-shi Nara, 60, 〒6391160, JP)
International Classes:
B23Q15/12; G05B19/404
Domestic Patent References:
WO2012032811A12012-03-15
WO2014098172A12014-06-26
Foreign References:
JP2015217500A2015-12-07
JP2012091249A2012-05-17
JP2013039645A2013-02-28
Attorney, Agent or Firm:
MURAKAMI, Satoshi (Dojima Building, 7th Floor 6-8 Nishitemma 2-Chome, Kita-ku, Osaka-sh, Osaka 47, 〒5300047, JP)
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