The effects of cutter eccentricity on the cutting force in the ball-end finish milling

Abstract

Ball-end mill are usually used for finish machining with multi-axis CNC milling centers. Cutter eccentricity (offset magnitude ec, angular location of the offset vector λc) is very important when predicting cutting forces accurately. In the process of cutting force modeling, not only the ec, but also the λc, affects the cutting forces by associating with the rotation angle, the chip thickness, and the entry and exit angles of the cutting forces. The ec affects the values of the cutting forces, while λc causes the delay phenomenon of the cutting forces mainly. Experiment results show that the cutting forces, considering the cutter eccentricity, more especially considering the influence of the λc, agree better with the measured cutting forces than the cutting forces without considering the cutter eccentricity.