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The purpose of this thesis is two folds. First, it
investigatesthe geometrical error of cutting corner under
different setting parameters in wire-cut electrical discharge
machine developed by the Mechanical Industry Research
Laboratories of Industrial Technology Research Institute,
Taiwan. It then proposes a strategy of controlling the wire-cut
electrical discharge machine for minimizing any bluntness of an
angular corner cut in a workpiece under optimum setting
parameters for various cutting conditions. The geometrical
errors of cutting corner under different setting parameters are
determined by the Experimental Plan of Taguchi Quality Design.
Based on the analysis of variance, the significant parameters
affecting geometrical error of cutting corner are found. By
means of regression analysis and the systematic machining test,
the mathematical model and rule table related the significant
parameters and the others are established. According to the
developed mathematical model and rule table, a strategy to tune
the machining parameters automatically at corner cut is
constructed. Experimental results demonstrate that the
strategycan improve corner accuracy.
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