Title:
METHOD FOR ESTIMATING THERMAL DISPLACEMENT OF MACHINE TOOL
Document Type and Number:
Japanese Patent JP3151655
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To correctly estimate the thermal displacement in every operating condition from the transitional condition to the stationary condition by eliminating the difference in the time constant of the temperature and the thermal displacement.
SOLUTION: When the number of revolution is changed while the thermal displacement including the temperature measurement is corrected, the step difference between the temperature and the intermediate value for estimation is operated. The temperature for input calculation to which the differential absorption is calculated based on the step difference, the time after the number of revolution is changed, and the time constant of the temperature. The number of correction after the number of revolution is changed, or the optimum filter coefficient according to the time is calculated. The intermediate value for estimating the thermal displacement is obtained from the filter coefficient and the temperature for input calculation. The thermal displacement of a main spindle is estimated based on the value, and the correction value corresponding thereto is outputted to an NC machine.
Inventors:
Harumitsu Senda
Application Number:
JP3098296A
Publication Date:
April 03, 2001
Filing Date:
February 19, 1996
Export Citation:
Assignee:
Okuma Corporation
International Classes:
B23Q15/18; B23Q17/00; G05B19/404; (IPC1-7): B23Q15/18; B23Q17/00
Domestic Patent References:
| JP6288548A | ||||
| JP430941A | ||||
| JP8215981A | ||||
| JP8300242A |
Attorney, Agent or Firm:
Yoshiki Ishida
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