What factors affects surface finish during EDM?
The amount of material removed and the surface finish produced is dependent upon the current in the spark. The material removed by the spark can be assumed to be a crater. The amount removed therefore will depend upon the crater depth, which is directly proportional to the current. Thus as the material removed increases and at the same time, the surface finish also decreases. However, decreasing the current in the spark, but increasing its frequency will improve the surface finish in view of the small crater size, but at the same time, the material removal rate can be maintained by increasing the frequency.
How to Calculate Upper diameter of hole?
Upper diameter of hole calculator uses Larger Diameter = 2*Depth of Machined Surface*Empirical Constant*Smaller Diameter^2+Smaller Diameter to calculate the Larger Diameter, The Upper diameter of hole formula is defined as the width of hole on the upper surface of workpiece during EDM. Larger Diameter is denoted by Dsd symbol.
How to calculate Upper diameter of hole using this online calculator? To use this online calculator for Upper diameter of hole, enter Depth of Machined Surface (Hsd), Empirical Constant (KT) & Smaller Diameter (d) and hit the calculate button. Here is how the Upper diameter of hole calculation can be explained with given input values -> 188.4 = 2*52*0.1388*1.2^2+1.2.