Vacuum
grippers
Vacuum grippers are used in the robots for grasping
the non –ferrous objects. It usesvacuum cups as the
gripping device, which is also commonly known as suction cups. This type
of grippers will provide good handling if the objects are smooth, flat, and
clean. It has only one surface for gripping the objects. Most importantly,
it is not best suitable for handling the objects with holes.
Vacuum cups:
Generally, the vacuum cups (suction cups) will be in
the round shape. These cups will be developed by means of rubber or
other elastic materials. Sometimes, it is also made of soft plastics.
Moreover, the vacuum cups are prepared of hard materials for handling the soft
material objects.
Two
different devices are used in the suction cups for creating the vacuum. They
are: ·Venturi
·Vacuum pump
Venturi device is operated with the help of shop
air pressure, while the vacuum pump is driven either by means of vane or
piston device. The vacuum pump has the ability to create the high vacuum.
As the venturi is a simple device, it is more reliable and inexpensive.
Both these devices are very well capable of providing high vacuum if there is a
sufficient supply of air pressure.
Types of vacuum
grippers:
·The ball joint
type vacuum gripper is capable of changing into various contact angles
automatically. Moreover, the bending moments in the vacuum cups are also
decreased. It is used for carrying irregular materials, heavy objects, etc.
·A vacuum gripper with level compensator can
be very helpful in balancing the objects with different levels. It also has the
capability to absorb the shocks.
Applications of vacuum
grippers:
·Vacuum grippers are highly useful in the heavy
industries, automobiles, compact disc manufacturing, and more for material
handling purposes.
·It is also used in the
tray & box manufacturing, labeling, sealing, bottling, and so on for packaging
purposes.
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