1991 Volume 25 Issue 49 Pages 23-32
This paper descrives a detaled research investigation on improvement of machining accuracy of corner parts, especially in rough-cutting of Wire-EDM.
Because of the use of low-rigidity wire electrodes, it is essential to understand the behavior of wire electrodes in machining process for improvement of machining stabillity and machining accuracy at corner parts. From this point of view, some papers proposed methods of correction by changing machining locus in corner part. However, it is difficult to keep high accuracy at vertical middle parts of workpieces, because conventional correction methods allow bends of wire electrodes.
In this paper, the bend of the wire electrode can be reduced by changing machining condition at coner parts, as a result, machining errors of corner parts in rough-cutting can be reduced to less than 50% of normal machining.