The development in manufacturing has insisted upon the fabrication of microdrilled holes on orthopedic implants, with finished side wall (devoid of cracks and burr), thin recast layer, low taper, and improved circularity at entry and exit of the hole. In this study, therefore, a multiobjective optimization of wire electric discharge machining microdrilling response characteristics is addressed in order to improve the hole quality characteristics and viability of implants. To improve the quality characteristics of the hole, a hybrid statistical analysis is developed based on grey relational analysis and coefficient of variation. It identifies the key process parameters that are responsible for improving the quality of the hole. The parametric study also reveals that wire feed rate and servo feed rate have a striking effect on the quality of the hole. An important implication of this study is that a thin recast layer, improved entry and exit circularity, adequate taper were observed under optimum drilling condition.

中文翻译：

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316 L 不锈钢骨科植入物的 WEDM 微钻孔

制造业的发展坚持在骨科植入物上制造微钻孔，具有成品侧壁（无裂纹和毛刺）、薄重铸层、低锥度和改善孔入口和出口的圆形度。因此，在本研究中，解决了线放电加工微钻孔响应特性的多目标优化问题，以提高植入物的孔质量特性和可行性。为了改善孔的质量特性，基于灰色关联分析和变异系数的混合统计分析被开发。它确定了负责提高孔质量的关键工艺参数。参数研究还表明，送丝速度和伺服进给速度对孔的质量有显着影响。本研究的一个重要意义是在最佳钻孔条件下观察到薄重铸层、改进的入口和出口圆度、足够的锥度。