Abstract
The results of experimental study on ultraprecision orthogonal microdiamond cutting of single-crystal copper are presented. The orthogonal cutting tests were carried out on an ultraprecision fly-cutting machine under various nominal depths of cut from 3.0 μm down to 0.01 μm (10 nm ). The machinability in microcutting and the influences of crystal orientation on the microcutting process are discussed from the standpoints of chip formation, cutting forces and surface integrity. It is confirmed that the continuous chips are formed under the whole cutting conditions examined. The magnitude of the cutting force and the shear angle are substantially influenced by the crystal orientation at depths of cut of 1 μm or more, while they are not notably influenced with a decrease in the depth of cut below 1 μm.
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