BLOCK DIAGRAM OF A HORIZONTAL MILLING
MACHINE AND ITS VARIOUS PARTS
PARTS OF HORIZONTAL MILLING MACHINE :-
1. Base: It gives support and rigidity
to the machine and also acts as a reservoir for the cutting fluids.
2. Column: The column is the main
supporting frame mounted vertically on the base. The column is box shaped,
heavily ribbed inside and houses all the driving mechanisms for the spindle and
table feed.
3. Knee: The knee is a rigid casting
mounted on the front face of the column. The knee moves vertically along the
guide ways and this movement enables to adjust the distance between the cutter
and the job mounted on the table. The adjustment is obtained manually or
automatically by operating the elevating screw provided below the knee.
4. Saddle: The saddle rests on the
knee and constitutes the intermediate part between the knee and the table. The
saddle moves transversely, i.e., crosswise (in or out) on guide ways provided
on the knee.
5. Table: The table rests on guide
ways in the saddle and provides support to the work. The table is made of cast
iron, its top surface is accurately machined and carriers T-slots which
accommodate the clamping bolt for fixing the work. The worktable and hence the
job fitted on it is given motions in three directions:
a). Vertical (up and down) movement provided
by raising or lowering the knee.
b). Cross (in or out) or transverse motion
provided by moving the saddle in relation to knee.
c). Longitudinal (back and forth) motion
provided by hand wheel fitted on the side of feed screw.
In addition to the above motions, the table
of a universal milling machine can be swiveled 45° to either side of the centre
line and thus fed at an angle to the spindle.
6. Over arm: The Over arm is mounted at the top of the column and is guided
in perfect alignment by the machined surfaces. The Over arm is the support for
the arbor.
7. Arbor support: The arbor support is
fitted to the Over arm and can be clamped at any location on the Over arm. Its
function is to align and support various arbors. The arbor is a machined shaft
that holds and drives the cutters.
8. Elevating screw: The upward and
downward movement to the knee and the table is given by the elevating screw
that is operated by hand or an automatic feed.
REFERERRED BY : - ER. RAJNISH KUMAR (A.P.), MECHANICAL ENGINEERING DEPT., SAMALKHA GROUP OF INSTITUTIONS
REFERERRED BY : - ER. RAJNISH KUMAR (A.P.), MECHANICAL ENGINEERING DEPT., SAMALKHA GROUP OF INSTITUTIONS
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