Faced with cutting state monitoring problem of closed CNC machining center

cutting force measurement is fed back to the detection system to identify the state of the workpiece and the tool

and an integrated dynamometer based on piezoelectric quartz sensor with vertical cross arrangement is researched and fabricated.The design of elastic ring structure at the core of the dynamometer is optimized

static analysis of the dynamometer and solution of reaction force of sensors are completed.Dynamic and static performance indicators of the dynamometer are verified

including nonlinear errors

repeatability errors

crosstalk and natural frequency.The source of the crosstalk is analyzed

the relationship between installation deviation of the sensor and crosstalk is derived and it is concluded that the dynamometer has good test precision

high stiffness and principal sensitivity.