Modern or Non-traditional manufacturing processes is defined as a
group of processes that remove excess material by various techniques
involving mechanical, thermal, electrical or chemical energy or
combinations of these energies but do not use a sharp cutting tools as it
needs to be used for traditional manufacturing processes.
Extremely hard and brittle materials are difficult to machine by traditional
machining processes such as turning, drilling, shaping and milling.
Nontraditional machining processes, also called advanced
manufacturing processes, are employed where traditional machining
processes are not feasible, satisfactory or economical due to special
reasons as outlined below.
• Very hard fragile materials difficult to clamp for traditional
machining
• When the workpiece is too flexible or slender
• When the shape of the part is too complex
Several types of non-traditional machining processes have been
developed to meet extra required machining conditions. When these
processes are employed properly, they offer many advantages over non-
traditional machining processes. The common non-traditional machining
processes are described in this section.
Modern manufacturing processes are classified according to the type of
fundamental machining energy employed. A detail classification f the
machining process based on the type of energy used , the mechanism
of metal removal, the source of energy requirements etc is given below:
, Classification of machining processes
Type of Mechanism Transfer Energy source Processes
Energy of Metal Media
Removal
Mechanical Erosion High velocity Pneumatic/Hydraulic AJM, USM,
particle pressure WJM
Shear Physical Cutting tool Conventional
contact machining
Electro Ion Electrolyte High current ECM, ECG
chemical displacement
Chemical Ablative Reactive Corrosive agent CHM
relation environment
Thermoelectric Fusion Hot gases Ionized material IBM, PAM
Electrons High voltage EDM
Vaporization Radiation Amplified light LBM
Ion stream Ionized material PAM
AJM: Abrasive Jet Machining
CHM: Chemical machining
ECG: Electrochemical Grinding
ECM: Electrochemical Machining
EDM: Electro Discharge Machining
IBM: Ion Beam Machining
LBM: Laser Beam Machining
PAM: Plasma Arc Machining
USM: Ultrasonic Machining
WJM: Water Jet Machining