Iterative surface warping to shape craters in micro-EDM simulation
Iterative surface warping to shape craters in micro-EDM simulation
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DOI：
10.1007/s00366-016-0439-0
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发表时间：
2016-07
影响因子：
8.7
通讯作者：
Anthony Surleraux;J. Pernot;A. Elkaseer;S. Bigot
中科院分区：
文献类型：
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作者：
Anthony Surleraux;J. Pernot;A. Elkaseer;S. Bigot
介绍了一种新的微细电火花加工过程仿真方法，以预测刀具磨损和工件粗糙度。刀具和工件由NURBS曲面片定义，其形状由物理参数驱动的迭代火山口变形技术产生。通过数十万次局部曲面变形，该方法能够计算出刀具和工件的全局和局部形状。在每一步中，计算扭曲向量和函数，以便能够生成其体积也被控制的球形凹坑。由于该方法能够很局部地模拟真实的物理现象，因此不仅可以从低分辨率的总体最终形状来评估刀具的磨损，而且还可以从高分辨率水平来估计工件的粗糙度。通过与实验数据的比较，验证了模拟方法的有效性。不同的模拟提出了增加计算精度，以研究其对结果的影响和它们与预期值的偏差。
This paper introduces a new method for simulating the micro-EDM process in order to predict both the tool’s wear and the workpiece’s roughness. The tool and workpiece are defined by NURBS patches whose shapes result from an iterative crater-by-crater deformation technique driven by physical parameters. Through hundreds of thousands of local surface warping, the method is able to compute the global as well as the local shapes of the tool and workpiece. At each step, the warping vector and function are computed so as to be able to generate a spherical crater whose volume is also controlled. While acting very locally to simulate the real physical phenomenon, not only the method can evaluate the tool’s wear from the overall final shape at a low resolution level, but it can also estimate the workpiece’s roughness from the high resolution level. The simulation method is validated through a comparison with experimental data. Different simulations are presented with an increase in computation accuracy in order to study its influence on the results and their deviation from expected values.