Miscellaneous robot gripper types

The most commonly used three types of robot grippers in industrial applications are mechanical, vacuum, and magnetic grippers. Apart from these devices, there are also some other gripper types available such as adhesive, scoops, hooks, and inflatable bladder.

Adhesive grippers:

In this gripper, the adhesive body is used to grasp the fabric objects. It is also very much suitable for carrying the light-weight materials. As like magnetic and vacuum grippers, it uses only one surface for gripping the objects.

One disadvantage in this gripper design is that it will lose its strong adhesive substances when it is used continuously. As a result, the consistency of the gripper is reduced and leads to the improper grasping of objects.

This disadvantage can be solved by constantly applying the adhesive substances on the gripper. It can be done by using a continuous ribbon connected to a feeding system, which is placed in the robot wrist. This process looks very much related to the operation of a typewriter ribbon system.

Scoops:

Scoop is used as an end effector for grasping the material in the form of powder or liquid. It handles some objects like molten metal, food, chemicals, and granular. There are two problems in this gripper such as:

  • The control of the material is very difficult.
  • It may also spill out the materials, while performing the process.

Hooks:

A hook gripper is incorporated in an operation for picking up the containers of parts. A hook that grips an object will require a handle for permitting the gripper to grasp it. Moreover, this type of grippers can be used in the part loading and unloading process in which the work parts hang from the overhead conveyors.

Inflatable bladder type gripper:

The inflatable bladder type gripper is made of rubber or some sort of elastic materials. It can be used to pick up the fragile objects by expanding the inflatable bladder. The mechanical gripper applies concentrated power for grasping a material, while this type gripper applies a constant handling pressure in opposition to the object surface.

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