INFLUENCE OF FRICTION AND PROCESS PARAMETERS ON THE SPECIFIC CUTTING FORCE AND SURFACE CHARACTERISTICS IN MICRO CUTTING
INFLUENCE OF FRICTION AND PROCESS PARAMETERS ON THE SPECIFIC CUTTING FORCE AND SURFACE CHARACTERISTICS IN MICRO CUTTING
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DOI：
10.1080/10910340802518728
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发表时间：
2008-12
影响因子：
2.7
通讯作者：
M. Weber;H. Autenrieth;J. Kotschenreuther;P. Gumbsch;V. Schulze;D. Löhe;J. Fleischer
中科院分区：
文献类型：
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作者：
M. Weber;H. Autenrieth;J. Kotschenreuther;P. Gumbsch;V. Schulze;D. Löhe;J. Fleischer
对于少量微型器件的生产，机加工是光刻处理技术的低成本替代方案。然而，加工显示出工艺特定的尺寸效应后，微型化到微米制度。为此，选择正交车削工艺，通过二维热力耦合有限元模拟，研究了未切屑厚度h、切削速度vc和切削刃半径rβ等工艺参数对切削力和表面塑性的影响。率相关塑性定律用于研究正火中碳钢（AISI 1045）。并利用相似力学的方法对不同参数的影响特性进行了数学分析。特别地，基于实验结果，采用摩擦系数μ详细研究了摩擦对切削过程的影响，并通过数值计算确定了工艺参数对切削力和表层塑性变形的影响。这些结果与实验测量进行了比较。对具体的切削力进行了详细的分析和讨论。实验观察到的尺寸效应也被数值模拟发现。
For the production of small quantities of micro devices, machining is a low cost alternative to lithographic processing techniques. However, machining shows process specific size-effects upon miniaturization to the micrometer regime. Hence, the orthogonal turning process is chosen to study the influence of process parameters like uncut chip thickness h, cutting velocity vc and cutting edge radius rβ on the cutting force and the surface plastification by two-dimensional, thermo-mechanically coupled finite element simulations. A rate-dependent plasticity law is used for investigation of a normalized medium carbon steel (AISI 1045). Furthermore, the characteristics of the influences of the different parameters are analyzed mathematically by similarity mechanics. In particular, the frictional effects on the cutting process are studied in detail using a friction coefficient μ based on experimental results, and the influences of the process parameters on the cutting force and the plastic deformation of the surface layer are determined numerically. These results are compared with experimental measurements. The specific cutting forces are analyzed and discussed in detail. Size-effects observed experimentally are also found by numerical simulations.