Experimental Study on Influence of Sway Radius and Cutting-tool Center Lifting on EDM Effect
In order to improve the performance of electrical discharge machining(EDM)system,numerical control system of EDM was developed via PC platform.The cutting tool can be raised with high speed,and the axises can be sway machined under linkage control.In this paper,the cutting tool was set under center lifting mode,and the sway radiuses were set at 30 μm,60 μm,and 90 μm,respectively.Then,the experimental results under different modes were compared.Setting the sway radius at 90 μm,the experimental results with and without cutting-tool center lifting mode were compared.The sway radiuses results show that,with the increasing of sway radius,the processing time extends and the machining etching rate decreases.Deviation of diameters and radius of bottom fillet decreases,although diameter and depth of the holes increased after machining.Despite the changes in sway radius,the surface roughness was basically the same and electrode loss rate decreased with the increasing of sway radius.Under the cutting-tool center lifting mode,efficiently,machining etching rate,electrode loss rate,diam-eters and deviation of diameters decrease.Radius of bottom fillet,machining depth and surface roughness was basically the same.
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