Machine Tools are stationary power-driven
machines used to shape or form solid materials,
especially metals. The shaping is accomplished
by removing material from a workpiece or
by pressing it into the desired shape. Machine
tools form the basis of modern industry
and are used either directly or indirectly
in the manufacture of machine and tool parts.
Machine tools may be classified under
three main categories:
- Conventional chip-making machine tools.
- Unconventional machine tools.
Conventional chip-making tools shape the
workpiece by cutting away the unwanted portion
in the form of chips. Presses employ a number
of different shaping processes, including
shearing, pressing, or drawing (elongating).
Unconventional machine tools employ light,
electrical, chemical, and sonic energy;
superheated gases; and high-energy particle
beams to shape the exotic materials and
alloys that have been developed to meet
the needs of modern technology.