It’s a type of gripper which the jaws or fingers were actuated by the pneumatic cylinder. The cylinder consists of a piston and rod moving inside a closed barrel, designed to move in a straight line to deliver linear motion. And it’s drove by compressed air. The jaws or fingers were assembled on the cylinder piston rod by gear device or the lever structures. When the cylinder rod is pushed to contract or extend, the fingers are opened or clamped to grasp the object.
Normally were combined with a collaborative industrial robot arm, or mechanical arms to pick up and hold objects and completed the transport task. Most time, it’s the automate key processes, such as inspection, assembly, pick & place and packing finally.
They are positioned at the end of the arm and their abilities allow you to combine the strength of an arm with the dexterity of a hand. This combination opens up a huge range of possibilities for material handling with robots, from stacking large boxes to handling tiny, delicate electronic components.
The Pneumatic gripper is a key component of modern manipulators. The air gripper has the following characteristics.
① All the structures are double acting, which can realize two-way grasping, automatic centering, and high repeat accuracy.
② the holding torque is constant.
③ non-contact detection switches can be installed on both sides of the cylinder.
④ there are various installation and connection methods.
it provides quick swing-and-clamp movement though a piston cylinder which with a screw rod. The piston rod is directly processed into a screw, and the piston reciprocates linearly.
These clamps are intended for quick clamping in secondary manufacturing operations on metallic or non-metallic products. These double-acting, pneumatic swing clamps offer a wide combination of features that make them uniquely adaptable to applications such as welding and assembly operations.
Dg-Pnetic offers a wide range of models in a variety of bore sizes and mounting styles. The standard pneumatic swing clamps are non-locking clamps that provide a clamping force in direct proportion to bore size and inlet pressure.
When choosing a pneumatic gripper, we shall consider the following factors:
1. Part shape, orientation, dimensional variation and weight.
If the object has two opposing flat surfaces, then 2 jaw parallel gripper is desired since it can handle some dimensional variation. Jaws can also be designed to handle cylindrical objects with the 2-jaw concept. Keep in mind that a retention or encompassing grip requires much less force.
2. Grip force
The gripping force must be adequate to secure the object while a desired operation is performed on the object. The type of jaw design must be part of the force requirement. Keep in mind that you should add a safety factor to the amount of force that you select, and air pressure is another factor to keep in mind.
3. Accessibility
This applies are both to the work being performed on the object and the room for the gripper jaws. If the acting force is on the exterior of the object, then it may require an internal grip. Angular grippers are usually less expensive but require additional space for jaw movement.
4. Environmental
Pneumatic grippers should be selected based on the operating environment. Grippers designed for clean environments may fail in harsh environments.
5. Retention of the Object
When air pressure is lost, the gripper will relax its grip on the object and the object may be dropped. There are spring assist grippers designed for this type application.
Sensors can be installed alongside pneumatic grippers to monitor and control the operating position of the fingers.
Magnet Switch
Most of the two fingers gripper can be installed along side. They can be inserted into the grooves present in the body as seen in two fingers gripper. These switches can detect the open or closed position of the fingers.
Proximity Sensors
Can detect the proximity by sensing the object and provide the information back to the controller. No matter what kind of pneumatic grippers, this sensor could be installed together.