Verfahren und Vorrichtung zur Kompensation dynamischer Verlagerungen an spanabhebenden Werkzeugmaschinen
A method for compensating the dynamic effects of vibration between cutting tool and workpiece which characterises metal-cutting operations employs a direct measurement of such disturbances at their point of influence. Figure (1) shows the head (3) of a turning centre in which the workpiece (2) is chucked to the spindle (1) and rotates (n) against the cutting tool (4) in the travelling (Vf) toolpost (5). During a pass along the workpiece (2) the small mutual displacements between its periphery and the tool (4) are registered by a capacitive sensor (7) to yield a mathematical model. The model is then used to control the compensating movements of a piezoelectric or other suitable actuator (6) to minimise the surface roughness of the workpiece. USE/ADVANTAGE - Has marked effect on quality of finish attainable during precision turning/grinding operations.
DE 1996-19607941 A: 19960301