Title:
MACHINE TOOL, CHIPPED PART DETECTION METHOD, AND CHIPPED PART DETECTION PROGRAM
Document Type and Number:
Japanese Patent JP2020093305
Kind Code:
A
Abstract:
To provide a technology for detecting a chipped part of a tool by a method different from conventional ones.SOLUTION: A machine tool 100 comprises a tool having a plurality of blades for cutting a workpiece, a main spindle for rotating the tool, an acquisition unit 90 for acquiring time-series physical quantities correlated to vibration of the main spindle, and a control device 101 for controlling the machine tool. The control device calculates at least one of a first vibration intensity of the main spindle corresponding to a first frequency, which is equal to a TPF (Tooth Passing Frequency) correlated to the rotation speed of the main spindle and to the number of blades of the tool minus a SRF (Spindle Rotation Frequency) correlated to the rotation speed of the main spindle, and a second vibration intensity of the main spindle corresponding to a second frequency, which is equal to the SRF plus the TPF, based on the time-series physical quantities. It detects a chipped part of the tool when at least one of the first vibration intensity, the second vibration intensity, and a composite value of the first vibration intensity and the second vibration intensity satisfies a predetermined condition.SELECTED DRAWING: Figure 7
Inventors:
NISHIKAWA SHIZUO
KAWAI KENGO
KAWAI KENGO
Application Number:
JP2018230512A
Publication Date:
June 18, 2020
Filing Date:
December 10, 2018
Export Citation:
Assignee:
DMG MORI SEIKI CO LTD
International Classes:
B23Q17/09; G05B19/4065
Domestic Patent References:
| JP2018054587A | 2018-04-05 | |||
| JP2017077618A | 2017-04-27 | |||
| JP2016083759A | 2016-05-19 | |||
| JPS62193751A | 1987-08-25 | |||
| JPS5633256A | 1981-04-03 | |||
| JPH11309649A | 1999-11-09 | |||
| JPH01164537A | 1989-06-28 |
Foreign References:
| US20170285626A1 | 2017-10-05 |
Attorney, Agent or Firm:
Fukami patent office