ABSTRACT

Fine finishing of the inner surfaces of the cylindrical blind holed (CBH) components has a rising demand in the manufacturing industries to reduce their frictional characteristics and improve functional efficiency. So, an attempt has been made in the present work to develop a new magnetorheological finishing (MRF) process with a grinding wheel type single magnetic tool for fine finishing the CBH work part surfaces. The main novelty in the proposed work is the grinding wheel type magnetorheological finishing (GWMRF) tool designed with the V-shaped grooves to retain the magnetorheological polishing fluid more strongly. This is because of the edge effect which provides a higher magnetic flux concentration. Also, the present single GWMRF tool operates eccentrically so that different sizes of CBH surfaces can be finished. After the experimentation with the MRF process using optimized parameters, the roughness values reduce from 240 to 90 nm on the longitudinal and 60 from 230 nm on the flat end surfaces of the CBH workpiece utilizing the V-grooved GWMRF tool. The surface characteristics get enhanced significantly. Thus, the present developed process can find its usefulness in industries for fine finishing the CBH workpieces like molds, dies, etc. after the traditional grinding process.

摘要

圆柱形盲孔（CBH）组件的内表面的精细精加工在制造业中对降低其摩擦特性和提高功能效率的需求不断提高。因此，在目前的工作中已经尝试开发一种新的磁流变精加工（MRF）工艺，该工艺采用砂轮型单磁工具对CBH工件表面进行精加工。拟议工作中的主要新颖之处是砂轮型磁流变抛光（GWMRF）工具，该工具设计有V形凹槽，可以更牢固地保留磁流变抛光液。这是因为边缘效应提供了更高的磁通量浓度。而且，当前的单个GWMRF工具偏心地操作，因此可以完成不同尺寸的CBH表面。使用优化的参数对MRF工艺进行实验后，使用V槽GWMRF工具在CBH工件的纵向上将粗糙度值从240 nm减小到90 nm，在CBH工件的平端面上将粗糙度值从230 nm减小60。表面特性得到显着增强。因此，本发明的工艺可以发现其在工业中用于在传统磨削工艺之后精加工CBH工件（例如模具，模具等）的有用性。