Abstrato

Experimental Analysis of Regenerative Chatter in BFW Vertical Milling Machine

Sunilsing Rajput, Dr. D.S. Deshmukh

Regenerative chatter is a self-excited vibration which occurs in milling machines. This is an undesirable phenomenon which occurs in milling machine when they are operating at high speed. They have negative effects, such as poor surface finish, unacceptable accuracy, excessive noise, tool wear and lower Material Removal Rate (MRR). Prediction and control of chatter is very important in milling machine spindle-tool unit, which gives guidance to the machine tool user for an optimal selection of spindle speed and width/depth of cut, which reduces chatter vibration and excess noise which is produced because of high speed operation. In this paper, an experimental investigation is presented of vertical milling machine which is predicted and control by Harmonizer software, which suggests the stable spindle speed and depth of cut for the operator. On the basis of experiments, the Stability lobe diagram is plotted which shows the stable and unstable region for that machine.