15 Factors while selecting a Gripper
The most common purpose of a gripper (often called the final
effector) is to identify or surround parts for transport, insertion or assembly
in automated manufacturing and processing systems. Gripper are also used in
environments that are dangerous to a person's presence. To ensure adequate
grip, several factors are required for selection and design. The following
considerations will help you choose and change the size of the suitable clamp
for your application.
1. Part shape:-
Two jaw clamps are generally used when a product or part has two opposite
planes. If the piece is cylindrical, you can use three gripper
jaws. The tools can be designed to accommodate cylindrical parts with two clamp
jaws.
2. Accessibility and
consistency of the piece:- The angular gripper are generally less
expensive, but the arc movement of the jaw may require additional space of the
tool and is held at various points as the width of the piece changes. It is
easier to use parallel pliers to compensate for the size of the piece.
3.Weight of the
piece:- The grip must be sufficient to transport the piece safely.
4.Orientation and
dimensions: The orientation of the piece and the distance from the face of
the gripper influence the selection of the clamp.
5.Size:- Nominal
grip dimensions represent the approximate size of the gripper.
6.Deformation:-
The minimum jaw movement of the gripper is determined by changes in the grip
location or encapsulation.
7.Air pressure:-
The air pressure of the gripper affects the size of the gripper, so it must be
taken into account.
8.Open or closed
grip:- The grip strength varies in each direction due to the effective area
of the rod in some types of gripper. When changing the size, the grip
direction must be taken into account.
9. Velocity:-
Speed and acceleration / deceleration influence caliper selection.
10.Tool Length:-
Long tool lengths make bending moments grip to affect size.
11.Tool
configuration:- If the part is encapsulated, the required grip may be less
than holding only flat parts.
12.Product
maintenance:- if it is necessary to retain parts in case of loss of air, a
spring or a locking cam can be assigned to the clamp.
13.Environment:-
In hostile environments, special coatings or materials must be specified.
14.Synchronous
operation:- Most gripper provide synchronized jaw movement. In special
circumstances, an independent jaw travel is required and can be supplied upon
request.
15.Exchange options:-
Most gripper offer several exchange options.
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