Method and device for compensating for a thermally induced change in position on a numerically controlled machine tool

A method for compensating for a thermally induced change in position on a numerically controlled machine tool, comprising:

• providing a characteristic map describing a temperature behavior, in particular a thermo-elastic behavior, of said machine tool at a control device of said machine tool,
• determining one or more temperature values by means of one or more temperature sensors on said machine tool,
• determining one or more compensation parameters at said control device of said machine tool based on the determined one or more temperature values and the provided characteristic map,
• compensating for a temperature-dependent change in position on said machine tool according to the determined one or more compensation parameters, and
• adapting the provided characteristic map by means of a computer-implemented neural network,
• wherein said neural network is integrated into a central server connected to said control device of said machine tool,
• wherein said central server is connected to a plurality of control devices of machine tools, and
• wherein said central server has a plurality of neural networks, wherein each neural network is associated with one of the control devices of the machine tools and the plurality of neural networks communicate with one another.

A control system for compensating for a thermally induced change in position on a numerically controlled machine tool, comprising:

• a control device of said machine tool, and
• a computer-implemented neural network,
• wherein a characteristic map, describing a temperature behavior of said machine tool based on one or more FE models of said machine tool, is provided at said control device of said machine tool,
• wherein said control device of said machine tool is configured to determine one or more compensation parameters on the basis of one or more temperature values determined by means of one or more temperature sensors on said machine tool and the provided characteristic map and to compensate for a temperature-dependent change in position of said machine tool according to the one or more determined compensation parameters, and wherein said computer-implemented neural network is configured to adapt the provided characteristic map.

A control system for compensating for a thermally induced change in position on a numerically controlled machine tool, comprising:

• a control device of said machine tool,
• a computer-implemented neural network, and
• a central server connected to said control device of said machine tool,
• wherein a characteristic map describing a temperature behavior, in particular thermo-elastic behavior, of said machine tool is provided at said control device of said machine tool,
• wherein said control device of said machine tool is configured to determine one or more compensation parameters on the basis of one or more temperature values determined by means of one or more temperature sensors on said machine tool and the provided characteristic map and to compensate for a temperature-dependent change in position of said machine tool according to the one or more determined compensation parameters, and wherein said computer-implemented neural network is configured to adapt the provided characteristic map,
• wherein said neural network is integrated into the central server connected to said control device of said machine tool,
• wherein said central server is connected to a plurality of control devices of machine tools,
• wherein said central server has a plurality of neural networks, and
• wherein each neural network is associated with one of the control devices of the machine tools and the plurality of neural networks communicate with one another.