Demonstrator 8: HPC Absolute Calibrator Demonstrator

The HPC measurement head is designed to measure the absolute dynamic compliance behaviour of machine tools, as it is clamped instead of the tool inside the HSK interface of the spindle. This can allow a quick characterization of the position dependent dynamic behaviour of the machine tool. A single axis test bench was build to test this calibrator. The design of the test bench is chosen to provide a remarkable change in its dynamic behaviour depending on the position of the single axis. The test bench can be seen as a model of a sleeve or a Z-slide of a milling machine. As the measurements with the HPC measurement head have shown, the dynamic behavior changes remarkably, when the slide position changes. With the help of the absolute exciter it is possible to characterize this change more efficiently, since it allows an automatic measurement procedure. The FRF - measurements can be repeated automatically in lots of axis positions and does not need manual operations, whereas such a measurement would mean a lot of effort, when carried out with the help of the conventional impact hammer. The demonstrational HPC test bench provided essential testing capabilities during the development of the HPC measurement head and also served to demonstrate the great potential of this measurement head to efficiently characterize the position dependent dynamic behaviour of machine tools.