3506 塑性伝播速度における材料の除去メカニズム

概要

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Discussed in this report was the difference in material removal mechanism below and beyond its static plastic propagation speed. It was found that when the cutting speed exceeded the propagation velocity of material the workpiece became "brittle", resulted in the reeducation in plastic flow/deformation and work hardening, and thus the improvement in finished surface integrity. At such ultrahigh cutting speed, the ductile metal behaved much like the brittle materials. Based on these findings, the authors further proposed and developed a new concept of novel grinding machine of 600m/s speed and 10mm/step positioning capability, in order to achieve both high productivity and high accuracy at the same time. This study particularly investigated the cutting speed effect on ground surface of aluminum alloy (5056).
2000-07-31