根据横向卷曲短螺卷屑形成过程中切屑动力学及其折断判据理论，得出了极限背吃刀量的理论预报公式；
Based on the theory of chip dynamics and it's breaking foundation in the formation process of side-curl short-spiral chip, the critical depth-of-cut is formulated.
特别是JT9和JT11刀具，不但刀具磨损量小，加工表面质量好，而且在切削45钢和45淬硬钢时切屑为崩碎切屑。
Especially the tool wear size of JT9 and JT11 is small and the machined surface quality is high. In cutting 45 anneal steels and 45 hardened steels by JT9 and JT11 tools, chips were segments.
介绍了基于量热法的碳钢高速车削切削热在切屑、工件、刀具及环境中的量化分配。
The distribution curve of workpiece temperature induced by the shear heat source is obtained.
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