US 2013/0116851 A1 · THERMAL DISPLACEMENT COMPENSATING DEVICE AND THERMAL DISPLACEMENT COMPENSATING METHOD

Abstract

In a thermal displacement compensating device and a thermal displacement compensating method for a machine tool, 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 FEM analysis section. A compensation section compensates the machining command position by the compensation value obtained by the compensation value calculation section.

Claims10

Dependent claims

1-9. (canceled)

A thermal displacement compensating device for a machine tool, comprising:

temperature sensors arranged at predetermined portions on a structural body of the machine tool;
block temperature obtaining means that obtains temperatures of respective blocks based on temperature information detected by the temperature sensors wherein temperatures in each of the respective blocks into which the structural body of the machine tool is divided to be pluralized are defined as a uniform value;
finite element method analysis means that performs a structural analysis by a finite element method based on the temperatures of the respective blocks obtained by the block temperature obtaining means and that infers thermal displacement amounts of the structural body of the machine tool;
compensation value calculation means that calculates a compensation value for a command position by an NC program of a movable body of the machine tool based on the thermal displacement amounts of the structural body of the machine tool inferred by the finite element method analysis means;
and
compensation means that compensates the command position by the compensation value obtained by the compensation value calculation means.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/809,937Filed 16 May 2012

Priority

JP 2011-11053717 May 2011

Published

9 May 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

G06F 1/206
Cooling means: comprising thermal management
B23Q 11/0007
Arrangements for preventing undesired thermal effects on tools or parts of the machine: by compensating occurring thermal dilations
G05B 19/404
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
G06F 30/23
Design optimisation, verification or simulation: using finite element methods [FEM] or finite difference methods [FDM]

Thermal displacement compensating device and thermal displacement compensating method

Life of this patent

Thermal displacement compensating device and thermal displacement compensating method

Life of this patent

Abstract

Claims10