Spannkraftsensoren in Dreibackenfuttern. Spannkraftüberwachung unter Berücksichtigung der Krafteinleitung

Chucking force monitoring with consideration of forces and stresses in the jaw. The clamping force of chucks can be measured with wire strain gauges during the machining operation. In order to determine suitable measuring points, the deformation behaviour of base jaw and top jaw was examined with the finite element method. The calculated results and experimental investigations showed that the kind of force must be taken into consideration for the calibration of the sensors. This restriction is removed when the sensors are stressed at the clamping position above a defined load point. In this case the calibration can be carried out pendent from the load point.