The control of a machine - tool by the measurement of the vibration and the force lateral of a cutting tool

摘要

A system for sensing the vibration and lateral force in a cutting tool for the purpose of keeping both these operating parameters within tolerable limits. A piezoelectric crystal is mounted in the chuck supporting the cutting tool. The mechanical stresses on the crystal produce an electrical signal which is then separated into vibration and lateral force components. The negative d.c. analog voltages of these components are summed with a positive d.c. voltage analogous to the programmed feed rate, the algebraic summation resulting in an adaptive control voltage which is used to modulate the spindle power in accordance with the ambient vibration and force.