The Life of Carbide-Tipped Turning Tools
The Life of Carbide-Tipped Turning Tools
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DOI：
10.1243/pime_proc_1947_157_070_02
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发表时间：
1947-06
期刊：
影响因子：
--
通讯作者：
F. Bisacre;G. H. Bisacre
中科院分区：
文献类型：
--
作者：
F. Bisacre;G. H. Bisacre
本文是对刀具寿命问题的合理定量理论的一个贡献。在本文的第一部分中，作者讨论了无冷却液的高速金属切削的绝热理论。在用干式碳化钨加工中碳钢时，根据切削速度的不同，切削在两种截然不同的物理条件下进行。当切屑穿过工具面时，金属发生塑性变形，并且在与工具面接触的切削表面处或附近产生最强烈的较高温度。因此，在切屑的下层产生的温度要比其他地方高得多。如果切削速度很高，就没有足够的时间将热量有效地扩散到切削的较冷部分;热量实际上停留在产生的地方。条件是绝热的。另一方面，当切削速度足够慢时，有时间使热量完全扩散，从而使切削速度降低。
The paper is a contribution towards a rational quantitative theory of the tool-life problem.In the first part of the paper, the authors discuss an adiabatic theory of high-speed metal cutting, with no coolant. In machining medium-carbon steel with dry tungsten-carbide, cutting takes place under two widely different physical conditions, depending on the speed of cutting. Plastic deformation of the metal takes place as the chip crosses the tool face, and a higher temperature is developed most intensely at or near the surface of the cutting in contact with the tool face. Consequently the temperatures generated are higher—perhaps much higher—in the lower layers of the chip than elsewhere.If the speed of cutting is high, there is not sufficient time for effective diffusion of heat to take place into the colder parts of the cutting; the heat in fact stays where it is generated. The conditions are adiabatic. On the other hand, when cutting is slow enough, there is time for complete diffusion of heat to take plac...