The cylindrical mold is an essential part used in industries for the manufacturing of various cylindrical products such as beverages canes, domestics appliances, glass beakers, and polyvinyl chloride pipes. These products require features in its surfaces such as defect-free surfaces with high-quality, stable dimensions, the high extent of cylindricity, and functional transparency in glass material products. To acquire such features in the cylindrical products, the rotary magnetorheological honing (R-MRH) process is developed. In this work, the response surface methodology technique is employed for optimizing the process parameters for internal surface finishing of the cast-iron (CI) cylindrical workpieces. With the optimized process parameters, the experiments are performed to find out the effectiveness of the present finishing process for CI cylindrical molds. On the final MR-finished surface after 40 min of finishing, the roughness parameters (Ra, Rz, and Rq) get reduced to 0.05 µm, 0.4 µm, and 0.07 µm from the respective initial values of 0.420 µm, 2.4 µm, and 0.52 µm. The waviness parameters (Wa, Wz, and Wq) achieved on the final finished surface are 0.04 µm, 0.20 µm, and 0.06 µm from the initial values of 0.17 µm, 0.90 µm, and 0.22 µm, respectively. Also, the circularity (C) on the MR-finished cylindrical surface is improved to 0.0437 from the initial circularity value of 0.1207. The significant changes in Ra, Wa, and C values as well as visuals of scanning electron microscopy images reveal a better sense of functionality improvement of the cast-iron cylindrical molds.

圆柱形模具是用于制造各种圆柱形产品（如饮料棒，家用电器，玻璃烧杯和聚氯乙烯管）的工业中必不可少的零件。这些产品要求其表面具有一些特性，例如高质量，尺寸稳定的无缺陷表面，高圆柱度以及玻璃材料产品的功能透明性。为了在圆柱产品中获得此类特征，开发了旋转磁流变珩磨（R-MRH）工艺。在这项工作中，采用响应表面方法技术来优化铸铁（CI）圆柱形工件内表面精加工的工艺参数。利用优化的工艺参数，进行实验以发现目前的CI圆柱模具精加工工艺的有效性。在40分钟的精加工后的MR精加工表面上，粗糙度参数（Ra，Rz和Rq）分别从初始值0.420 µm，2.4 µm和0.52 µm减小到0.05 µm，0.4 µm和0.07 µm。在最终精加工表面上获得的波纹度参数（Wa，Wz和Wq）分别从初始值0.17 µm，0.90 µm和0.22 µm分别为0.04 µm，0.20 µm和0.06 µm。而且，在MR完成的圆柱表面上的圆度（C）从初始圆度值0.1207提高到0.0437。Ra，Wa和C的显着变化 值以及扫描电子显微镜图像的视觉效果显示出铸铁圆柱模具的功能改进更好。