Method to ensure precision machining positioning accuracy
In order to ensure high repeatable positioning accuracy and not to reduce the processing efficiency, precision edm adopts the positioning system of fast clamping, such as 3R rapid clamping fixture of GF machining program.When using this kind of fixture, as long as the precision is adjusted before matching, the highest repeat positioning accuracy can reach + / -2 million in machining, the electrodes and the workpiece can be replaced quickly. Before machining, the center of the spindle chuck and the workpiece center zero can be located by using the automatic dividing function of the CNC edm machine tool.
It is very convenient to take off the workpiece for dimensional measurement and continue processing.The method in the base ball segmentation can guarantee the high accuracy of repeated positioning, and the contact area between the base ball and the workpiece is one point when dividing, which can avoid the influence of the existence of micro sundries on the positioning accuracy.
The positioning electrode and workpiece for precision machining must have a clear positioning reference, and the electrode is taken as the center point of the reference, so that the error of the electrode size can be evenly distributed.The workpiece can be taken as the reference single side or the reference center according to the situation, and the reference surface used to touch the edge must be smooth and even, especially important when depth positioning, so as to control the accuracy error of positioning at the minimum.