Title:
VARIATION CAUSE IDENTIFYING METHOD AND LASER PROCESSING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/241783
Kind Code:
A1
Abstract:
A control unit is caused to: perform a current control execution step in which drive current feedback control is performed so as to bring a laser output of laser light of a laser oscillator closer to a target value; identify a variation occurrence timing at which, during execution of the current control execution step, an output variation occurred such that a difference between the laser output and the target value exceeds a predetermined threshold value; identify, from a plurality of first physical quantities measured during execution of the current control execution step, an abnormal physical quantity exhibiting an abnormal value within a first monitoring time determined in accordance with the variation occurrence timing; identify, from a plurality of second physical quantities providing a cause for variation of the abnormal physical quantity, a physical quantity exhibiting an abnormal value within a second monitoring time determined in accordance with an abnormality start timing at which the abnormal physical quantity exhibited an abnormal value, as a variation cause; and output information indicating the identified variation cause to an output device.
Inventors:
NISHIHARA MANABU
SHIBATA KENZO
WANG JINGBO
NISHIO MASATOSHI
SHIBATA KENZO
WANG JINGBO
NISHIO MASATOSHI
Application Number:
PCT/JP2020/021201
Publication Date:
December 03, 2020
Filing Date:
May 28, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B23K26/00; H01S3/00; H01S5/022; H01S5/0683
Foreign References:
| JP2017191833A | 2017-10-19 | |||
| JP2017005141A | 2017-01-05 | |||
| JPH10190134A | 1998-07-21 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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