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
Advancement of Abrasive Flow Machining Using an Anodic Solution
Results of the research on the electrochemically assisted abrasive flow machining (ECAFM) have been presented in this paper. The experimental evaluation of several solid electrolytes with various bonds has been carried out (the polypropylene glycol PPG with the NaI salt share and ethylene glycol PEG with KSCN salt share have been subjected to the tests). The abrasive properties of the electrolytes have been enhanced by adding the Al2O3 and SiC grains and its consistence has been adjusted by the SiO2 addition. The important technological and economical advantages of the investigated ECAFM process have been demonstrated.
European Neutrality in Historical Perspective
This chapter places the neutrality policies of the established European neutral states—Austria, Finland, Ireland, Sweden and Switzerland—in historical context. It explores the origins of neutrality in the idea of non-belligerency in war and the history of neutrality in modern European international politics, highlighting the way in which quite a wide variety of states were or sought to be neutral at various points in the nineteenth century or the first half of the twentieth century. The chapter then shows how the Cold War division of Europe resulted in Austria, Finland, Ireland, Sweden and Switzerland (along with Yugoslavia) emerging as a distinctive neutral group of states between the two blocs. The chapter also reviews how the European neutral states’ foreign and security policies have adapted since the end of the Cold War. It finishes with some conclusions about neutrality in general and the neutrality of the established European neutral states in particular.