MRRmilling
MRRmilling is the practice of maximizing the material removal rate during milling operations. It is used as a productivity metric to evaluate and optimize milling strategies by estimating how quickly a milling operation can remove material from a workpiece, subject to tool life, workpiece quality, and machine constraints. The material removal rate (MRR) for milling is commonly expressed as MRR = v_f × a_p × w, where v_f is the feed rate in millimeters per minute, a_p is the axial depth of cut, and w is the width of cut. For milling with multiple flutes, the feed rate can be written as v_f = f_z × N × z, where f_z is the feed per tooth (mm/tooth), N is spindle speed (rpm), and z is the number of teeth. Therefore, MRR = f_z × N × z × a_p × w.
MRRmilling is influenced by tool geometry (diameter, number of flutes, helix angle), cutting speed, feed per
Limitations: MRR is an idealized metric that does not alone guarantee productivity; real optimization also considers