ppt

1. MILLING MACHINE
OPERATIONS
The milling machine removes metal with a
revolving cutting tool called a milling cutter.
With various attachments, milling machines
can be used for boring, slotting, circular milling
dividing, and drilling.
This machine can also be used for cutting
keyways, racks and gears and for
fluting taps and reamers

2. Types
. Milling machines are basically classified as being
horizontal or vertical to indicate the axis of the
milling machine spindle.
 These machines are also classified as knee-
type, ram-type, manufacturing or bedtype, and
planer-type milling machines.
 Most machines have self-contained electric drive
motors, coolant systems, variable spindle
speeds, and power

3.  Size Designation. All milling machines are identified by
four basic
 factors: size, horsepower, model, and type. The size of a
milling machine is based on the longitudinal (from left to
right) table travel, in inches.
 Vertical, cross, and longitudinal travel are all closely
related as far as the overall capacity. However, for size
designation, only the longitudinal travel is used.
 There are six sizes of knee-type milling machines, with
each number representing the number of inches of
travel.

4. Milling Machine Accessories And Attachments
 Arbors. Milling machine cutters can be mounted
on several types of holding device. The
machinist must know the devices, and the
purpose of each to make the most suitable
tooling setup for the operation to be performed.
 Technically, an arbor is a shaft on which a cutter
is mounted.
 For convenience, since there are so few types of
cutter holders that are not arbors, we will refer to
all types of cutter holding devices as arbors.

5. Milling Machines
 Milling machine arbors are made in
various lengths and in standard
 diameters of 7/8, 1, 1 1/4, and 1 1/2 inch.
The shank is made to fit the
 tapered hole in the spindle, the other end
is threaded.

20. Milling Splines

28. Universal Vise

29. Mounting Work piece in Vise

31. INDEXING

32. SIMPLE INDEXING MECHANISM.