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 Study of Process Parameters On Material Removal Mechanism in Hybrid Abrasive Flow Machining Process (AFM)
Abrasive flow machining (AFM) is a non-traditional machining process for the production of high quality surface of inner profiles that are difficult to access & is used to deburr, remove recast layer &radius surfaces. In this process material was removed by a grinding medium. The grinding medium consists of a semi-solid fluid made up of polymer, gel and abrasives and Non Newtonian polymer. In this investigation the key parameters abrasive mesh size, abrasive concentration, rotational speed of tooling rod and diameter of rod were varied to see their effects on material removal. Hybrid machining process has been developed to enhance the rate of material removal. In this process, centrifugal force has been provided to grinding media by rotating tool rod inside the workpiece causes effective MR. For this a set up has been developed. For experimental design L9 orthogo- nal array based on taguchi method was used.
Simulation of surface generated in abrasive flow machining process
Abstract For the control of abrasive flow machining (AFM) process, it is important to understand the mechanics of generation of its surface profile. This paper describes the analysis and simulation of profile of finished surface and material removal by the interaction of abrasive grains with workpiece. The abrasive grains are randomly distributed in media depending upon their percentage concentration and mesh size. The results predicted from simulation and obtained from response surface analysis (or experiments) are compared to explain the relative importance of AFM parameters. The generated surface profile and material removal are the function of number of cycles, percentage concentration and mesh size of abrasives, reduction ratio and extrusion pressure applied.