Material removal mechanism beyond plastic wave propagation rate
Material removal mechanism beyond plastic wave propagation rate
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DOI：
10.1016/s0141-6359(02)00124-1
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发表时间：
2003-04
影响因子：
3.6
通讯作者：
Li-bo Zhou;J. Shimizu;Akihito Muroya;H. Eda
中科院分区：
文献类型：
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作者：
Li-bo Zhou;J. Shimizu;Akihito Muroya;H. Eda
在这份报告中讨论的是材料去除机制低于和超过其静态塑性波传播速率。韧性材料在其大部分强度范围内都表现出弹性，当切削速度超过其静态扩展速率时，显然会变得“脆”。这种行为导致加工过程中塑性流动/变形和加工硬化的显著减少，从而可能提高总表面完整性。为了实现这样的高速加工，采用最新技术新开发了超高速磨床，其圆周速度能够达到600 m/s，定位精度为10 nm/步。本研究特别研究了切削速度对纯铝（A1199）和铝合金（A5056）这两种典型韧性金属的影响，揭示了静态扩展速率是一个断裂点，在此基础上，去除机理有所不同。
Discussed in this report are the material removal mechanisms below and beyond its static plastic wave propagation rate. The ductile materials are expected to behave elastically throughout most of its strength range, and apparently become “brittle” as cutting speed exceeds its static propagation rate. This behavior leads to a significant reduction in plastic flow/deformation and work hardening during the machining process, so as possibly to improve the total surface integrity. In order to achieve such high speed machining, a super high speed grinding machine has been newly developed by using the latest technologies, which is able to attain 600m/s peripheral speed and 10nm/step positioning accuracy. This study particularly investigates the cutting speed effect on the typical ductile metals of pure aluminum (A1199) and aluminum alloy (A5056), and reveals that static propagation rate is a breaking point from where the removal mechanism is different.