Abstract
The purpose of this paper is to investigate the machining mechanisms that accompany the single-point diamond fly-cutting operation in grooving of brittle materials. Single-point diamond fly-cutting is widely used in precision machining of free-form optics, semiconductor devices, and micro-electromechanical system (MEMS) components among many others. The undeformed chip zone was analyzed and its relation to the critical brittle/ductile transition depth of cut was discussed. Then, a mechanics-based model was proposed to describe the material stress condition under the diamond tool. The machining parameters were incorporated into the model to understand fly-cutting behavior. It was shown that the fly-cutting technique is highly suitable for the ductile removal of brittle materials by generating large compressive pressures in the chip formation zone. This condition can be further enhanced by a small feedrate and a large negative rake angle of the diamond tool used. The theoretical results were substantiated and verified by fly-grooving experiments performed on mono-crystalline silicon.
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Peng, Y., Jiang, T. & Ehmann, K.F. Research on single-point diamond fly-grooving of brittle materials. Int J Adv Manuf Technol 75, 1577–1586 (2014). https://doi.org/10.1007/s00170-014-6245-1
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DOI: https://doi.org/10.1007/s00170-014-6245-1