A milling machine rotates a circular cutting tool to machine flat workpieces. The workpiece is held in a vice or clamp and can move in three perpendicular directions while the cutting tool rotates. The most common types are vertical and horizontal milling machines, where the main spindle is oriented vertically or horizontally. Key parts include the base, column, knee, table, spindle, and head. The table can move longitudinally while the workpiece is clamped to it.
2. Milling machine
• Milling machine, device that rotates a circular
tool that has a number of cutting edges
symmetrically arranged about its axis; the
workpiece is commonly held in a vise or
similar device clamped to a table that can
move in three perpendicular directions.
• Used to machine flat workpieces
3. Milling machine
• Working principle is opposite of lathe machine
• Cutting tool is rotating about its axis
• Workpiece is showing linear movements
4. Types of milling machines
• The most common type of milling machine is
knee and column type milling machine it has
further two type;
• Vertical milling machine (the main spindle is
in vertical direction)
• Horizontal milling machine (the main spindle
is in horizontal direction)
13. Parts of milling machine
• Base:
• It is a foundation member and it carries the
column at its one end. In some machines, the
base is hollow and serves as a reservoir for
cutting fluid.
14. Parts of milling machine
• Column:
• The column is the main supporting member
mounted vertically on the base. It is box-
shaped, heavily ribbed inside and houses all
the driving mechanism for the spindle and
table feed. The front vertical face of the
column is accurately machined and is provided
with a dovetail guideway for supporting the
knee.
15. Parts of milling machine
• Knee:
• The knee is a rigid grey iron casting which
slides up and down on the vertical ways of the
column face. An elevating screw mounted on
the base is used to adjust the height of the
knee and it also supports the knee.
16. Parts of milling machine
• Table:
• The table rests on ways on the saddle and travels
longitudinally. A lead screw under the table
engages a nut on the saddle to move the table
horizontally by hand or power. In universal
machines, the table may also be swiveled
horizontally. For this purpose the table is
mounted on a circular base. The top of the table
is accurately finished and T -slots are provided for
clamping the work and other fixtures on it
17. Parts of milling machine
• Spindle:
• It is situated in the upper part of the column
and receives power from the motor through
belts, gears, and clutches.
