Kumar Patel Dinesh, Goyal Deepam, Pabla B S
Department of Mechanical Engineering, National Institute of Technical Teachers Training and Research, Sector-26, Chandigarh 160019, India.
R Soc Open Sci. 2018 May 30;5(5):171906. doi: 10.1098/rsos.171906. eCollection 2018 May.
Surface integrity has attracted the attention of researchers for improving the functional performance of engineering products. Improvement in surface finish, one of the important parameters in surface integrity, has been attempted by researchers through different processes. Grinding has been widely used for final machining of components requiring smooth surfaces coupled with precise tolerances. Proper selection of grinding wheel material and grade with grinding parameters can result in an improved surface finish and improved surface characteristics. The present work reports the study of the effect of grinding parameters on surface finish of EN8 steel. Experiments were performed on surface grinding and cylindrical grinding for optimization of grinding process parameters for improved surface finish. Grinding wheel speed, depth of cut, table feed, grinding wheel material and table travel speed for surface grinding operation, and work speed for cylindrical grinding operation were taken as the input parameters with four types of grinding wheels (AlO of grades K and L, and white alumina of grades J and K). The surface roughness was taken as an output parameter for experimentation. The grinding wheel material and grade have been observed to be the most significant variables for both cylindrical grinding and surface grinding. Surface roughness in the case of surface grinding is better compared to that of cylindrical grinding, which can be attributed to vibrations produced in the cylindrical grinding attachment. Surface roughness () values of 0.757 µm in cylindrical grinding and 0.66 µm in surface grinding have been achieved.
表面完整性已引起研究人员的关注，以提高工程产品的功能性能。表面光洁度作为表面完整性的重要参数之一，研究人员已通过不同工艺对其进行改善。磨削已广泛用于对需要光滑表面且公差精确的零件进行最终加工。合理选择砂轮材料、粒度以及磨削参数可改善表面光洁度和表面特性。目前的工作报道了磨削参数对EN8钢表面光洁度影响的研究。进行了平面磨削和外圆磨削实验，以优化磨削工艺参数，提高表面光洁度。平面磨削操作中的砂轮速度、切削深度、工作台进给量、砂轮材料和工作台行程速度，以及外圆磨削操作中的工件速度，被作为输入参数，使用了四种类型的砂轮（K级和L级的刚玉，以及J级和K级的白刚玉）。表面粗糙度被作为实验的输出参数。已观察到，砂轮材料和粒度对于外圆磨削和平面磨削而言都是最显著的变量。平面磨削的表面粗糙度优于外圆磨削，这可归因于外圆磨削附件中产生的振动。外圆磨削的表面粗糙度（）值达到了0.757 µm，平面磨削的表面粗糙度值达到了0.66 µm。
