The copper cylindrical roller plays an important role in the printing operation. The copper roller requires fine and uniform finishing to uniformly distribute the colours and ingot material. Fine and uniform finishing of copper cylindrical rollers get difficulty using the traditional finishing processes due to their ductility and low hardness. Therefore, to achieve this fine finishing requirement, the rotary rectangular tool core-based magnetorheological (MR) finishing process is employed. Initially, the suitable MR polishing fluid composition is selected for the effective fine finishing of the surface of the copper cylindrical rollers. Furthermore, the central composite design is used to optimize the MR finishing process parameters. The surface roughness profiles, surface texture, and reflection tests are performed on the initial ground surface and the MR finished surface of the copper roller. The surface roughness value gets reduced from 190 nm to 25 nm after 4 hrs MR finishing with the optimum parametric conditions over the copper cylindrical roller surface having a dimension of 120 mm in length and 25 mm in diameter. The present MR finishing process found effective to significantly reduce the surface roughness value and enhance the surface characteristics of the copper cylindrical rollers. The geometrical dimensions in terms of circularity and straightness are also checked on the initial ground surface and finished surface of the copper cylindrical roller using the coordinate measuring machine and waviness test. The enhancement in surface characteristics, dimensional accuracy, and surface hardness after the present MR finishing process is found to be beneficial for improving the functional performance of the copper cylindrical rollers in the printing processing machine.

铜质圆柱滚子在印刷操作中起着重要作用。铜辊需要精细而均匀的抛光，以均匀地分布颜色和铸锭材料。铜圆柱滚子的精细和均匀的精加工由于其延展性和低硬度而难以使用传统的精加工工艺。因此，为了达到这种精细的精加工要求，采用了基于旋转矩形工具芯的磁流变（MR）精加工工艺。最初，选择合适的MR抛光液成分，以对铜质圆柱滚子的表面进行有效的精细精加工。此外，中央复合设计用于优化MR精加工工艺参数。表面粗糙度轮廓，表面纹理，并在铜辊的初始地面和MR精加工表面上进行反射测试。在具有120毫米长和25毫米长的铜圆柱滚子表面上，在最佳参数条件下，经过4个小时的MR精加工，表面粗糙度值从190 nm减小到25 nm。发现本发明的MR精加工工艺有效地显着降低了表面粗糙度值并增强了铜圆柱滚子的表面特性。还使用坐标测量机和波纹度测试在铜圆柱滚子的初始研磨表面和精加工表面上检查了圆度和直线度方面的几何尺寸。表面特性，尺寸精度的提高，