A cutting performance based template for spindle dynamics

The stable metal removal rate in milling depends on the dynamic characteris tics of the tool-holder-spindle system. We present a methodology for determ ining the permissible dynamic characteristics based on the intended cutting operation. We produce a template that bounds the tool-tip frequency respon se function (FRF). Measured FRFs can be compared against the template to ch eck cutting performance. The template can be used in design to match the sp indle system to the intended application. The template accounts for lobing effects, multiple modes, process damping, and static stiffness. It accounts for damping variability, producing a safe-side estimate. Experimental resu lts illustrate the template's use.