Nc roughing machining of cavities defined by surface of revolution approach

Abstract EN

In the NC roughing phase of cavities, process planar needs to find the machining layers as well as the feasible cutters for these layers.

This Paper deals with the issues of Cavity Construction based on Surface of revolution technique using cubic Bezier curve as a generator curve.

First the generator curve is constructed in x-z plane then allowing it to revolve through 360o about z-axis in order to generate the required surface cavity.

A strategy of Maximum (critical cutter size) and Machining layers determination is also introduced in this paper.

Numerical iteration is used for this purpose using MATLAB programming system to reduce the computational time.

A comparison is made between different machining cavities critical cutter size and using cutters smaller than the critical size showing a wide reduction in the length of circular tool path(s) (CL) and the volume of removed metal (VRM).Numerical examples are presented to illustrate the proposed system.