Milling is a process of removing material with a rotating
multiple-tooth cutting tool called a milling cutter. In the usual
operation,the work piece is fed against the rotating cutter. The
common operations performed on milling machine are:slot keyways,.
Cut gear teeth,mill screw threads, cut irregular shapes,cut helical
shapes,cut helical flutes etc.
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Diagram of milling machine
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There are two basic types of milling machines,the names are
below: o Vertical Milling machine o Horizontal Milling machine
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Vertical milling machine The vertical milling machine is so
named because the spindle is located vertically and at a right
angle to the surface of the table. The spindle has vertical
movement,and the table can moved in 3 axis(X,Y and Z).Both the
table and spindle movement can b controlled by manually or power.
Vertical milling machine can use for face milling milling dies and
locating and boring holes.
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Horizontal milling machine The horizontal milling machine can
be recognized by its horizontal spindle. The cutter is mounted on a
horizontal arbor and is rotated by supplying power. The work table
can be fed in a longitudinal, cross or vertical directions. This
type of machine is generally used for surface milling, profile
milling, gear cutting etc.
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Milling operations Milling operation is broadly classified as
peripheral milling and face milling.
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Peripheral Milling This operation is also called plain milling
operation. In this operation axis of rotating tool is always kept
parallel to the surface being machined. This operation is done by
the cutting edges on outside periphery of the milling cutter.
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Slab Milling A milling process that uses the slab mill that
rotates on an axis parallel to the work piece. Slab milling
produces flat surfaces.
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cutter
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Side Milling A milling process in which a cylindrical milling
cutter having teeth on the circumferential surface on both
sides.
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cutter
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Straddle Milling It is just like side milling with difference
that cutting (milling operation) takes place simultaneously on both
the sides of work piece.
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cutter
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Face Milling A cutting process that uses a mill to cut a flat
surface by positioning the tool at a right angle to the work
piece.
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cutter
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End Milling A milling process that uses the sides and end of an
end mill to cut a variety of shapes.
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cutter
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Pocket milling This is a selective portion milling on the flat
surface of work piece used to make shallow packets there.
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Gang milling Gang milling refers to the use of two or more side
milling cutters mounted on the same arbor (that is, ganged) in a
horizontal-milling setup.
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cutter
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Slot milling The process of making a slot into the work piece
with the help of slotting cutter
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Form milling A milling process that uses a mill with a unique
shape that is imparted to a work piece.