High-accuracy turning with slender boring bars
Knut Sørby , Einar Sundseth
Advances in Manufacturing ›› 2015, Vol. 3 ›› Issue (2) : 105 -110.
High-accuracy turning with slender boring bars
The paper presents the theoretical background for new approaches for achieving high accuracy in finish turning with slender tools. The approaches are developed especially for high-accuracy turning with vibrations-damped boring bars with a length-to-diameter ratio up to 14. The approaches are based on established force models of turning operations and utilize a three-pass scheme where the deflection of the boring bar is calculated and compensated for in the final passes. Very good results are achieved in practical machining tests for a great variation of cutting conditions. Experiments show that the typical diameter error is 0.01 mm, even in situation where the tool deflection is 0.3 mm.
Turning / Precision / Boring bar
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