Dynamics of Stock Removal in Profile Milling Process by Shaped Tool

Abstract

The article describes the mechanism of the stock removal during the milling of cylindrical and shaping cutters, the cutting of the latter is outlined around. It is shown that during the processing with concaved shaping cutter the contact angle of the cutter with the workpiece changes in the height of the tool because of curved cutting teeth. The current contact angle increases from the end to the transverse mirror plane of the cutter, causing the shift in end of operation time of elementary cutting blades, considered in small neighbourhood of diametral plane of tool. It is found that for the convex surface to be treated a minimum value of the current contact angle is typical for the surface of each cutter and the maximum value - for the transverse diametral plane of the cutter. The results obtained reveal the dynamics of the stock removal in the profile milling of shaping cutter and are necessary for high-quality project of efficient processes for profile milling of mechanical engineering products, wood working and other industries. When the counter circuit of profile milling with the cutter tool the contacting of the tool with a workpiece starts at zero point of cut layer thickness and ends its maximum value at the end of a single cut which causes an increase in the cutting force.