Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
2007-07-17
2007-07-17
Masinick, Michael D. (Department: 2125)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C700S174000, C700S176000, C700S178000
Reexamination Certificate
active
11255649
ABSTRACT:
A method corrects thermal displacement of a machine tool having a rotational spindle. The method includes detecting a rotation speed of the spindle. A thermal displacement amount of the spindle in the current cycle of execution of a program is estimated by using an arithmetic expression that is based at least on the spindle rotation speed and a thermal displacement amount that has been estimated in the preceding cycle of execution of the program. The estimated thermal displacement amount in the current cycle is used as a correction amount for canceling the thermal displacement of the spindle. Therefore, thermal displacement of a machine tool is corrected with no complicated processes when a spindle rotation speed changes.
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Suzuki Yasuhiko
Tanahashi Makoto
Masinick Michael D.
Sheridan & Ross P.C.
Yamazaki Mazak Corporation
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