Machining processes are one of the most important finishing operations in the fabrication of composites, which contain natural fibers. However, it is difficult to attain a better fishing on the final components. Hence, an attempt has been made in the work to achieve a good surface finish in compression-molded hybrid fiber composites containing nanoclay particles by optimizing the milling parameters. Experiments were conducted by using Box–Behnken design (response surface methodology (RSM)) to optimize the milling process parameters such as spindle speed (16, 24, and 32 rpm), feed rate (0.1, 0.2, and 0.3 mm/rev.), and depth of cut (1, 1.5, 2 mm) along with different vol% of nanoclay content (3%, 6%, and 9%). The surface roughness of machined fiber composite was measured, and the most influential parameters were analyzed by analysis of variance, evaluation of signal-to-noise ratio, and mathematical models of responses were developed by RSM. The experimental results (A2B1C4D3) indicated that the feed rate is one of the most significant parameters, followed by nanoclay content, depth of cut, and spindle speed. Surface roughness was found to decrease continuously (2.18–2.08 µm) with increasing nanoclay content (up to 6%) at a certain limit and further addition of clay content (above 6%); the results were declined (2.42 µm) for the same levels of other parameters.

中文翻译：

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使用响应曲面法优化天然/玻璃纤维与纳米粘土聚合物复合材料的加工参数

加工过程是制造含有天然纤维的复合材料中最重要的精加工工序之一。然而，很难在最终组件上实现更好的捕获。因此，已经尝试通过优化研磨参数在包含纳米粘土颗粒的压塑混合纤维复合材料中实现良好的表面光洁度。通过使用 Box–Behnken 设计（响应曲面法 (RSM)）进行实验以优化铣削工艺参数，例如主轴速度（16、24 和 32 rpm）、进给速率（0.1、0.2 和 0.3 mm/rev。 )、切削深度（1、1.5、2 mm）以及不同体积百分比的纳米粘土含量（3%、6% 和 9%）。测量了机加工纤维复合材料的表面粗糙度，并通过方差分析对影响最大的参数进行了分析，RSM 开发了信噪比评估和响应数学模型。实验结果 (A2B1C4D3) 表明进给速度是最重要的参数之一，其次是纳米粘土含量、切削深度和主轴速度。发现表面粗糙度持续下降 (2.18–2.08 µ m) 在一定限度下增加纳米粘土含量（最高 6%），并进一步添加粘土含量（6% 以上）；对于相同水平的其他参数，结果下降 (2.42  µ m)。