Indian Welding Journal

Abstract

Advances in manufacturing technology and the quest for smaller part geometry, have played the role of a curtain raiser for the new frontiers of machining process of metals. In this specific domain of precision manufacturing, the traditional machining methods have limited capabilities to meet higher accuracy, better surface finish and greater productivity related requirements from the customer. Micro machining is a ready solution towards the miniaturization of components and devices. The main problems during micro machining methods are to make a low heat affected zone and the controllability of other parameters to meet ever demanding process capability related requirements. High energy beam machining identifies a category of processes, each of which is capable of transferring a beam of such high energy intensity into metal cutting or drilling forces. It should be used to melt and vaporize a narrow zone of metals. This ability is useful for precision drilling, welding and cutting. Low power pulse Nd:YAG laser machining is now being used for these purpose often with the high level of precision in an economically viable manner. Thin strip cutting of metals through laser beam is one of the main applications in this area. This paper is focused on the cutting and drilling of the mild steel workpiece with lower thickness values and an attempt has been made to study the different process parameters in linguistic terms, which will affect relative ranks of the quality of the precision cutting and micro drilling of the metal specimen.

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