The most important machine tools required in any workshop, nowadays are described below.
The
milling machine is used for milling, cutting, shaping, carving,
planing, contouring, drilling, stamping, and die-sinking a variety of
solid materials. The work piece is positioned, to cut and shape the
metal object on its tip, and from all the sides. There are two kinds of
milling machines; depending on the direction of the main spindle; namely
the vertical milling machine and the horizontal milling machine.
They are further classified as manually operated milling machines,
mechanically automated milling machines and electronically controlled
CNC milling machines. Milling machines are designed to perform simple
and complex machining operations.
The
grinding machine is utilized for grinding a metal workpiece into
required shapes and sizes; with the help of an abrasive wheel. The
abrasive wheel perfectly chips the rough metal surfaces into smooth
metal objects. Grinding is basically a finishing process that produces
workpieces with minimum surface roughness and maximum surface
smoothness. Normally grinders remove very less metal; however some
grinding operations involve rapid removal of large quantities of metal.
Both manual grinding machines and hydraulic grinding machines deliver highly precise workpieces.
A shaping
machine is used to cut small or large work pieces made from wood,
steel, aluminum, ferrous and non-ferrous metals etc. into various
shapes, angles, and curves. This shaper is smaller than a planer, and
has a cutting movement like a lathe. The single point cutter has a
linear motion and usually moves over the stationary work piece, instead
of the work piece moving under the cutter. Both conventional and modern
metal shaping tools are widely utilized to quickly and easily shape flat
and straight metal surfaces.
A slotting machine is another essential machine tool that is widely used for shaping or cutting a variety of wooden and metal objects. It is also known as a slotter or a vertical shaper. They are commonly utilized for making slots on the heads of metal screws and bolts, wooden screws, etc.
The
bandsaw machine is utilized for cutting long pieces of wood or metal
into a variety of odd or curved shapes. It consists of a long horizontal
metal band and a blade with sharp teeth on one side to cut the work
piece. The band moves on two wheels that rotate in the same plane, in
order to precisely cut different types of objects. Bandsaw machines are
mostly used for woodworking, metalworking; and for cutting different
materials into straight, asymmetrical and curved shapes. The horizontal
bandsaw machine and the double column bandsaw machine are the two kinds
of bandsaws.
A
hacksaw machine is also a vital machine tool that is used for cutting wood, metal, plastic and numerous other materials. It has a fine-tooth
saw with a blade that is held under tension by a screw or other
mechanism. The blade is made from high grade steel and its thickness
depends on the material to be cut. Some hacksaw machines also have a
coolant pump to avoid the saw blade from overheating.
The size of work table defines the maximum size of the workpiece a machine can do machining. milling machine tools
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