Introduction New Machining Methods |
The term new machining method refers to this group of process which removes excess material by various techniques involving mechanical, thermal, electrical chemical energy or combination of these energies. These processes do not use a sharp cutting tool in the conventional sense.
The new machining processes have been developed since World War II largely in response to new and unusual machining recruitment’s that could not be satisfied by conventional methods. This recruitment and the resulting commercial and technological importance of the new machining processes include the followings.
Importance of Machining Methods |
- The need to machine newly developed metals and non-metals. These new materials often have special properties for example high strength, high hardness and high toughness that make them difficult and impossible to by conventional method.
- The need for unusual or complex part geometrics that can not easily be accomplished and in some cases is impossible to achieve by conventional methods.
- The need to avoid surface damage on a part that often accomplished the stresses raised by conventional methods.
Type of machining methods |
The new machining method are often classified according to principle methods of energy used to effect material removal. By this classification there are four types.
- Mechanical :- mechanical energy is a some form different from the action of a conventional cutting tool is used in these newer machining processes. Erosion of the work material by a high velocity stream of abrasive or fluid.
- Electrical :- these newer machining process used electrochemical energy to remove, the mechanism is reverse to electroplating.
- Thermal :- These process use thermal energy to cut or shape the work part.
- Chemical :- most materials are susceptible to chemical attack by certain acids . in chemical machining chemicals selectively remove material from portions of work part.