How to avoid the pitting start line during Wire cutting EDM?

The pitting start line normally appears during the female mould making in wire cutting EDM. As we all know that the accuracy and finish requirement is very high for the precision mould. The pitting line will affect the surface of the final products directly. How to avoid the pitting start line? Here are two suggestions to avoid it for your reference:

1.     1. Applying the arc cutting paths to improve the surface. During programming, input the radius of arc cutting in and cutting out paths: 0.4-0.5mmis ok.

2.     2. Applying the tilt cutting in and out ways. In the auto-programming, the offset value code is H000, and the setting value is 0, so the starting point is the same as the end point during cutting path circle, and the second discharging happens on this same point, which leads to a pitting line of several micrometers. We can make the start cutting point different from the end point by applying the tilt cutting in and cutting out ways to avoid the second discharging. We just need to input the H000 value with 0.03-0.06mm.

Hope above suggestion is helpful to you. For any more information about solutions of the wire EDM machines, please feel free to contact us.

Thanks,

Tech EDM Team

www.techedm.com 

Sale@techedm.com