In-process image of machine tools - Transient-thermal and dynamic simulation of moving structures

The aim of structural mechanics simulation is to better represent the working accuracy of machine tools. The visualization is done in process, that is, during the machine movement. It is realized by reading out the control values and the subsequent simulation of the structural–mechanical behavior of the machine. This procedure allows deviations in the working accuracy outside the control loop to be taken into account, which cannot be detected by the measuring system. This allows an improved statement on the achievable working accuracy and enables the operator to react to any deviations in the machine accuracy. In contrast, the thermal behavior of machine tools focuses on an observation level which is characterized by long and strongly varying time constants. In contrast to process control, the term “thermal real time” addresses the seconds to hours range. For the implementation, a three-axis demonstrator machine with discrete elements was modeled.