Aruchamy Karthik, Palaniappan Sathish Kumar, Lakshminarasimhan Rajeshkumar, Mylsamy Bhuvaneshwaran, Dharmalingam Satish Kumar, Ross Nimel Sworna, Pavayee Subramani Sampath
Department of Mechatronics Engineering, Akshaya College of Engineering and Technology, Coimbatore 642109, Tamil Nadu, India.
Department of Mining Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.
Polymers (Basel). 2023 Jul 18;15(14):3075. doi: 10.3390/polym15143075.
Machining is considered to be an important post-manufacturing process. Evaluation of machinability of natural-fiber-reinforced composites is important owing to its wide application spectrum. Current experiments focus on the drilling parameters of cotton/bamboo woven fabric reinforced epoxy composites laminates using a solid twist drill. Composites were manufactured with 45 wt.% cotton/bamboo woven fabric in epoxy resin using a compression molding method. Drilling experiments were carried out in pillar-type drilling machine and the drilling characteristics, such as thrust force, were analyzed using four process parameters like spindle speed, feed rate, drill diameter, and silane-treated fabric. Drilling experiments were carried out using the Box-Behnken Experimental Design, and the recommended drilling characteristics were analyzed using quadratic models based on response surface methodology. It was observed from the results that the thrust force is low with small drill-bit diameter, higher cutting speed, and lower feed rate, according to the response surface analysis. Surface morphology of the drilled hole suggested that a better quality of hole can be obtained at lower feed rates.
机械加工被认为是一种重要的制造后处理工艺。由于天然纤维增强复合材料的应用范围广泛，对其可加工性进行评估具有重要意义。目前的实验聚焦于使用整体麻花钻对棉/竹编织织物增强环氧树脂复合材料层压板的钻孔参数。采用模压法，将45重量%的棉/竹编织织物与环氧树脂制成复合材料。在柱式钻床上进行钻孔实验，并使用诸如主轴转速、进给速度、钻头直径和硅烷处理织物等四个工艺参数分析诸如推力等钻孔特性。采用Box-Behnken实验设计进行钻孔实验，并基于响应面方法使用二次模型分析推荐的钻孔特性。根据响应面分析结果观察到，钻头直径小、切削速度高和进给速度低时，推力较小。钻孔的表面形貌表明，较低的进给速度可获得质量更好的孔。
