Optimization of process parameter for surface finishing in abrasive flow finishing process
274 Optimization of process parameter for surface finishing in abrasive flow finishing process Ravi Gupta (M.E) Asst. Prof.(Lovely Professional University) raviarya43@gmail.com , Abstract-Abrasive flow finishing is a non-conventional finishing process that is used for finishing of work piece which are difficult to finish by conventional method i.e. by honing, lapping and other machining operations. It is used for polishing, deburring, removing recast layer of component and for cleaning of surfaces having complex shape and size of geometrical components. Abrasive flow finishing process polishes the surface by forcing the abrasive medium inside the work piece through the restricted area. One of the limitations of this process is that it is time consuming process and low material removal rate. To overcome these limitations, a structure has been developed. In this setup, centrifugal force has been generated by using a tool rod inside the hollow work piece to which rpm was provided. The abrasive mesh size, abrasive concentration, number of cycle, extrusion pressure, rotational speed of CFG rod, diameter of tool rod and shape of tool rod are the some important process parameter which affects the surface quality. In this research paper, the role of abrasive mesh size, extrusion pressure, abrasive concentration and rotational speed has been discussed on Gun metal as material of work piece. For experimentation design, taguchi approach L9 orthogonal array has been used and for analysis of result, ANOVA has been performed. KeywordsAFF, Surface roughness, rotational speed Taguchi method, ANOVA
EXPERIMENTAL INVESTIGATION OF PROCESS PARAMETERS ON SURFACE ROUGHNESS IN HYBRID ABRASIVE FLOW MACHINING PROCESS (AFM)
Abrasive flow machining (AFM) is a non-traditional machining process which is used to deburr, polish and radius surfaces & edge by flowing an abrasive medium inside the workpiece surface to be machined. To make the process efficient, hybrid machining process has been employed by providing a centrifugal force generating rod with rotational mechanism in AFM setup. These centrifugal forces assist the media to rotate continuously as it moves axially inside the cylindrical workpiece. In this experimental study parameters such as abrasive grit size, abrasive concentration, rotational speed of rod and diameter of rod were varied to observe their effects on surface finish. The results reports that all the process parameters have remarkable effect on response parameter. L9 orthogonal array based on taguchi method has been employed for experimental design without considering any interaction.
Study of an internal magnetic abrasive finishing using a pole rotation system: Discussion of the characteristic abrasive behavior
An internal magnetic abrasive finishing process using a pole rotation system was proposed to produce highly finished inner surfaces of workpieces used in critical applications. Previous research found that the process incorporating one of the characteristic behaviors of the abrasive, the jumbling of the abrasive, results in aggressive contact of the abrasive against the inner surface, disturbing the smooth surface finish. The aim of this paper, therefore, is to characterize the in-process abrasive behavior against the surface and its effects on the finishing characteristics and to describe the finishing mechanism. The magnetic force acting on the magnetic abrasive, controlled by the field at the finishing area, is considered the primary influence on the abrasive behavior against the inner surface of the workpiece. This study examines the relationships between the magnetic field, the force on the abrasive, and the abrasive behavior. The surface roughness and material removal measurements resulting from finishing experiments demonstrate the effects of the abrasive behavior on the surface modifications. This paper also proposes a method to monitor the in-process abrasive behavior to facilitate processing.