MILLING
The milling is a machining process that allows modelling and trimming of metal, wood, plastic, and composites, etc. The milling machines have different parts like table, spindle, over arm, knee, column and base, power feed machine, and Arbor support.
The milling is a machining process that allows modelling and trimming of metal, wood, plastic, and composites, etc. The milling machines have different parts like table, spindle, over arm, knee, column and base, power feed machine, and Arbor support.
Service overview
The milling is a machining process that allows modelling and trimming of metal, wood, plastic, composites, etc. The milling machines have different parts like table, spindle, over arm, knee, column and base, power feed machine, and Arbor support.
Milling machines or machining centres removes chips and processing residues. Milling process requires a milling machine, workpiece, fixture, and cutter. Fixture secures the piece of a pre-shaped material. The cutter is sharp teethed and rotates at high speed. It cuts the workpiece in the form of small chips to produce the desired shape.
Features of Milling Process
⦁ Milling produces parts with no axial symmetry and having holes, slots, pockets, and even three-dimensional surface contours.
⦁ Milling process fabricates components in limited quantities, and they are as custom designed fasteners or brackets.
⦁ Milling is a secondary process used to refine parts that were manufactured using a different method.
⦁ Milling is ideal for adding precision due to high tolerances and surface finishing ability.
Types and equipment of the milling machine
There are specific components of the milling machines that allow the workpiece to move in three dimensions. The milling machines are composed of a column and knee structure. By the virtue of its spindle axis, they are of two kinds as follows –
Horizontal Milling Machine
Horizontal milling machine performs the following functions with the help of different parts-
The column holds the spindle, the bearings, the gearbox, the clutches, the shafts, the pumps. It is the shifting mechanisms that transmit power from the electric motor to the spindle at a selected speed.
It is placed in front of the column. It supports the table and provides the up and down movement along the z-axis.
It consists of two slideways one is present on the top and other is at the bottom. Both sideways provides motions using lead screws.
It is fitted on the saddle, and it can move along the X-axis. There are some T-slots for the mounting of the workpiece.
It is an enlargement of the spindle for mounting cutters. The threaded end of an Arbor is of the left-hand helix.
It is the major structural components. It is useful to hold, align, and support the remaining machine components.
It carries the tool and gives the actual tool rotation.
It changes the spindle R.P.M. setting.
It engages the spindle clutch to the motor. The operator can start and stop the spindle.
It changes the feed rate settings.
It controls the power to the main motor for the machine.
Vertical Milling Machine
It has the same construction to that of the horizontal milling machine. Only the difference is that the spindle is placed vertically.
It consists of the spindle, the motor. The feed control unit is on a swivel base so that it can set at an angle to the table.
The milling head is connected to ram. So that head can be moved forward and backward on the top of the column.