Week 1: Introduction and Mechanics of chips formation,

Lecture Notes page 9

Machining is a semi-finishing or finishing process essentially done to impart required or
stipulated dimensional and form accuracy and surface finish to enable the product to:
Fulfill its basic functional requirements.
Provide better or improved performance.
Render long service life.
Machining is a process of gradual removal of excess material from the preformed blanks in the form of
chips. The form of the chips is an important index of machining because it directly or indirectly
indicates:
Nature and behaviour of the work material under machining condition.
Specific energy requirement (amount of energy required to remove unit volume of work
material) in machining work.
Nature and degree of interaction at the chip-tool interfaces

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