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cross influences between the three parameters which are present in the solu-
tion formulae, a closed analytic solution of the 3-face blade geometry is impos-
sible. In order to achieve a sufficient front clean-up and realize the effective
input values, three imbedded iterations are required. The problem with imbed-
ded iterations is to achieve a stable and convergent behavior of the calcula-
tions while keeping the iterations fast. This goal was achieved with the iteration
strategy, symbolized in Figure 7.
Figure 6: Complete front clean-up (left), partial but sufficient
front clean-up (right)
Figure 7: Blade angle and clean-up iterations
The inner iteration loop No. 1 shown in Figure 7 influences the top rake angle
on the blade front face in order to achieve the given effective cutting edge
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