Introduction of non conventional machining process

Some past engineering industries have witnessed a rapid growth in the development of harder and difficult to machine material such as Hastelloy, naturally, mnemonics, stainless steel and many other high strength temperature resisting alloys.

This material widely used in various industries like aerospace, nuclear engineering and other industries. for such materials the conventional edged tool machining, in spite of recent technological advancement, is highly uneconomical and the degree of accuracy and surface finish are poor. and machining of these materials are complex shapes is difficult and sometimes impossible.

In 1960 merchant emphasized the need for the development of newer concepts in metal machining, these processes are non-conventional or unconventional in the sense that they do not employ a conventional tool for metal removal. they directly utilize some form of energy for metal machining.