| 摘要 |
Provided are a thermal displacement compensating device and a thermal displacement compensating method for a machine tool, capable of performing a structural analysis by a finite element method at a high speed and hence, of performing a thermal displacement compensation accurately on a real time basis. A block temperature obtaining section obtains temperatures of respective blocks based on temperature information detected by temperature sensors wherein temperatures in each of the respective blocks into which a column is divided to be pluralized are defined as a uniform value. An FEM analysis section performs a structural analysis by a finite element method based on the temperatures of the respective blocks obtained by the block temperature obtaining section and infers thermal displacement amounts of the column. A compensation value calculation section calculates a compensation value for a machining command position based on the thermal displacement amounts of the column inferred by the finite element method analysis section. A compensation section compensates the machining command position by the compensation value obtained by the compensation value calculation section. |
