Thermally Induced Clamping Force Deviations in a Sensory Chuck for Thin-Walled Workpieces

Abstract Deviations between nominal and actual tolerances are a challenging problem during turning processes of thin-walled workpieces. One main cause these deviations is the clamping force applied by chuck to hold workpiece. Due low stiffness workpieces, large workpiece deformations can occur even when forces low. For this reason, needs be precisely adjusted. A possible approach chucks with integrated actuators. As result more direct power transmission, have potentially higher accuracy compared conventional external actuation. However, actuators additional heart sources resulting in thermal loads thermally induced components. mechanical distortion system, precise adjustment not possible. Thus, paper evaluates on novel four electric drives. test bench used analyse both single drive combination all drives regarding temperature effect adjustability. deviation up 26% observed. Based measured temperature, compensation method introduced leading 96.9%.