In the current scenario, the advanced industries are using highly sophisticated types of machinery. These types of machinery use numerous cylindrical components made with superior materials and technology. For obtaining the nano-level finished interior cylindrical surface with high accuracy and high production rate, a newly developed rotational magnetorheological honing (R-MRH) process is employed on the cylindrical objects. This process is applicable in internal nano-finishing of cylindrical molds, hydraulic and pneumatic valves, aerodynamic bearings, gears, cylindrical barrel, and cylinders used in medical devices, etc. In the present work, the cylindrical workpiece is also made rotational in the reverse direction of the MRH-tool rotation unlike the existing MRH process. The rotating motion of the workpiece cylinder caused an increment in relative motion of the active abrasive particles against the interior surface of the workpiece cylinder. The effect of the rotational speed of the workpiece cylinder along with movements of the MRH-tool on change in surface roughness is investigated theoretically and experimentally in this work. Theoretically, it is found that the simultaneous motions of tool and cylindrical workpiece in the opposite direction to each other increase the finishing rate. To validate the theoretically increased finishing rate due to the rotating cylindrical workpiece, and to examine the effect of the rotational motion of the cylindrical workpiece on finishing performance, the experiments are conducted with the R-MRH process. The reduction in surface roughness is found as 71.71% in 60 min with the existing MRH process for the stationary cylindrical workpiece, whereas it is reduced to 83.83% in only 40 min with the R-MRH process for the rotational cylindrical workpiece. The significant change in surface roughness value with reduced finishing time validates the improved efficacy of present R-MRH process for its more utility in industries.

中文翻译：

---

用新开发的旋转磁流变珩磨工艺对内圆柱表面进行纳米精加工的理论和实验研究

在目前的情况下，先进工业正在使用高度复杂的机械。这些类型的机械使用许多由优质材料和技术制成的圆柱形部件。为了获得高精度、高生产率的纳米级精加工圆柱内表面，在圆柱物体上采用了新开发的旋转磁流变珩磨（R-MRH）工艺。该工艺适用于圆柱形模具、液压和气动阀门、气动轴承、齿轮、圆柱筒、医疗器械气缸等的内部纳米精加工。在目前的工作中，圆柱形工件也进行了反向旋转与现有的 MRH 工艺不同，MRH 工具旋转的方向。工件圆柱体的旋转运动导致活性磨粒相对于工件圆柱体内表面的相对运动增加。在这项工作中，从理论上和实验上研究了工件圆柱体的旋转速度以及 MRH 工具的运动对表面粗糙度变化的影响。理论上，发现刀具和圆柱形工件在彼此相反的方向上同时运动会提高精加工率。为了验证由于旋转圆柱形工件而在理论上增加的精加工率，并检查圆柱形工件的旋转运动对精加工性能的影响，使用 R-MRH 工艺进行了实验。发现表面粗糙度降低为 71。对于静止圆柱形工件，现有 MRH 工艺在 60 分钟内达到 71%，而对于旋转圆柱形工件，R-MRH 工艺仅在 40 分钟内将其降低到 83.83%。随着精加工时间的减少，表面粗糙度值的显着变化证实了当前 R-MRH 工艺在工业中更多效用的改进功效。