Method and apparatus for electric discharge machining with...

Details Method and apparatus for electric discharge machining with... Method and apparatus for electric discharge machining with...

B - Operations, Transporting

23

H

317/5, 341/63

B23H 1/00 (2006.01) B23H 7/02 (2006.01) B23H 7/20 (2006.01)

Patent

CA 1277009

METHOD AND APPARATUS FOR ELECTRIC DISCHARGE MACHINING WITH ADAPTIVE FEEDBACK FOR DIMENSIONAL CONTROL ABSTRACT Electric discharge machining of workpieces on a mass production basis is accomplished with adaptive feedback control to achieve accurate machining of a feature to a specified size. After machining a feature, it is measured to obtain a value which represents its size. An EDM process parameter is adjusted in accordance with the measurement value so that the next feature will be machined with the size closer to the specified size. Multiple features are machined in succession and the measurement values of successive features are analyzed to determine the trend of change of the values with respect to the specified size. The parameter, such as spark energy, is adjusted in a sense which tends to cause the succeeding features to be machined more accurately to the specified size.

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