1. The current should be stable when the aluminum material is opened and the wire cutting extrusion die is working, so that the size of the die hole after cutting is uniform and the hole wall is flat;

2. When cutting the working hole of the aluminum extrusion die, the current is not easy to be too large to prevent the molten layer from being too thick, because the molten layer is one of the main reasons for the brittle spalling of the working hole of the die hole.

3. When the EDM extrusion die works with an empty knife, the current is not easy to be too large to prevent burnt processing. The discharge gap is controlled at 0.05 ~ 0.1mm. When roughing the empty knife, remove it at 1mm from the higher part of the work belt The electrode is ground, and the working surface of the electrode is corrected to a curved shape according to the width of the working hole of the die hole (the surface is required to be flat and the roughness is low). The polarity is changed to perform aluminum finishing. When pressing the working hole of the die hole, the current should be stable, so that the size of the die hole after cutting is uniform and the hole wall is flat.