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SYLLABUS

UNIT-I

Elementary treatment of metal cutting theory – Elements of cutting process – Geometry of single point tool and angles, Chip formation and types of chips – Built up edge and its effects, Chip breakers. Mechanics of orthogonal cutting – Merchant’s force diagram, Cutting forces – Cutting speeds, Feed, Depth of cut, Heat generation, Tool life, Coolants, Machinability – Economics of machining. Cutting tool materials and cutting fluids – Types and characteristics.

UNIT-II

Engine lathe – Principle of working – Specification of lathe – Types of lathes – Work holders and tool holders – Taper turning, Thread turning and attachments for lathes. Turret and capstan lathes – Collect chucks – Other work holders – Tool holding devices – Box and tool layout. Principal features of automatic lathes – Classification – Single spindle and multi-spindle automatic lathes – Tool layout and cam design.

UNIT-III

Drilling and Boring machines – Principles of working, Specifications, Types, Operations performed – Tool holding devices – Twist drill – Boring tools – Machining time calculation. Shaping, Slotting and Planning machines – Principles of working – Principle parts – Specifications, Classification, Operations performed. Machining time calculations.

UNIT-IV

Milling machine – Principles of working – Specifications – Classification of milling machines – Principal features – Machining operations, Types and geometry of milling cutters – Methods of indexing – Accessories to milling machines. Grinding machine – Theory of grinding – Classification – Cylindrical and surface grinding machine – Tool and cutter grinding machine – Special types of grinding machines – Grinding wheel; Different types of abrasives – Bonds specification and selection of a grinding wheel. Static and dynamic balancing of a wheel. Truing and dressing of wheels. Lapping, Honing and Broaching machines – Comparison of Grinding, Lapping and Honing, Machining time calculations.

UNIT-V

Principles of design of jigs and fixtures and uses, 3-2-1 classification of jigs and fixtures – Principles of location and clamping – Types of clamping and work holding devices – Typical examples of jigs and fixtures. Unit built machine tools – Multi-spindle heads. Power units – Principal of working types of UBMTS characterization, applications.