Syllabus
UNIT-I
Drilling:
Type of Drilling Machines:
Sensitive & Radial drilling machines, Their constructional details and specifications.
Drill Bits:
Terminology - Geometry of twist drill-Functions of drill elements.
Operations:
Drilling, Reaming, Boring, Counter boring, Counter sinking, Tapping, Spot facing and Trepanning.
UNIT-II
Foundry:
Introduction:
Development of foundry as a manufacturing process, Advantages and limitations of casting over other
manufacturing processes.
Foundry Equipment:
Hand Moulding Tools:
Shovel, Riddle, Rammers, Trowels, Slicks, Lifter, Strike-Off bar, Sprue pin bellow, Swab, Gate cutter, Mallet,
Vent rod, Draw spike, Rapping plate or lifting plate, Pouring weight, Gagger, Clamps, Spirit level, Moulding
boxes, Snap box & Flash box.
Sands:
Properties of moulding sand-Porosity, Flowability, Collapsibility, Adhesiveness, Cohesiveness and Refractoriness.
Types of Moulding Sand:
Green sand, Dry sand, Loam sand, Facing sand, Backing sand, Parting sand, Core sand, System sand - their
ingredients and uses.
Pattern Making:
Materials such as wood, Cast Iron, Aluminium, Brass, Plastics their uses and relative advantages, Classification
of patterns such as solid (one piece), Two piece and three pieces, Split patterns, Gate patterns and shell
patterns, Sequence in pattern making, Pattern allowances and colour codes.
Cores:
Need of cores, Types of cores.
UNIT-III
Casting Methods:
Casting:
Green sand and dry sand moulding, Cement bonded moulding, Shell moulding, Ceramic moulding, Defects in
castings and their remedies.
Special Casting Processes:
(Principles and applications only) die casting-hot chamber and cold chamber, centrifugal casting, CO2 process,
Investment casting.
UNIT-IV
Mechanical Working of Metals:
Introduction:
Hot working and cold working.
Hot Working Processes:
Rolling - Types of rolling, Two high mill, Three high mills, Four high mills, Piercing or seamless tubing, Drawing
or cupping, Spinning, Extrusion - Direct or forward extrusion, Indirect or backward extrusion, Tube extrusion,
Impact extrusion.
Effects of hot working of metals, Advantages & Limitations of hot working of metals.
Cold Working Process:
Rolling, Drawing - Wire drawing, Tube drawing, Bending, Roll forming, Angle bending, Spinning, Extrusion,
Squeezing, cold heading, Thread rolling, Peening.
Effects of cold working of metals, Advantages & Limitations of cold working.
