Finger Pneumatic cylinders (pneumatic fingers or pneumatic grippers) can achieve various grasping functions and are key components of modern mechanical hands. They are often used in equipment in the packaging and food industries for picking up workpieces. The following introduces the application selection and working principle of pneumatic finger Pneumatic cylinders.
I. The Uses of Finger Pneumatic Cylinders
Pneumatic fingers, also known as pneumatic grippers or pneumatic pinch fingers, are actuating devices that use compressed air as power to pick up or grasp workpieces. It originated in Japan initially and was later widely used by domestic automation enterprises. According to the style, it is usually divided into Y-shaped finger clamps and flat finger clamps. The Pneumatic cylinder diameters are available in 16mm, 20mm, 25mm,32mm and 40MM. Its main function is to replace human grasping work, which can effectively improve production efficiency and work safety. The SMC pneumatic finger series is one of the most commonly used pneumatic gripper devices in the industrial field.
Ii. Selection Factors for Finger Pneumatic cylinders (Pneumatic grippers)
1. According to the size, shape, mass and usage purpose of the workpiece, select the parallel opening and closing type or the fulcrum opening and closing type.
2. Select the series of finger Pneumatic cylinders (grippers) based on the size, shape, overhang, usage environment and purpose of the workpiece.
3. Based on the clamping force of the air gripper, the distance between the clamping points, the extension amount and the stroke, select the size of the air gripper. Then, further choose the required options according to the demand.
Iii. Characteristics of Finger Pneumatic cylinders (Air Grippers)
All the structures of the finger Pneumatic cylinder are double-acting, capable of bidirectional grasping, automatic centering, and high repeatability accuracy.
2. The grasping torque is constant;
3. Non-contact detection switches can be installed on both sides of the Pneumatic cylinder.
4. There are multiple installation and connection methods.
Iv. Working Principle of Finger Pneumatic cylinders
The working principle diagram of the finger Pneumatic cylinder is shown as follows:
When air takes in through port A and exhaust through port B, the piston rod 1 of the Pneumatic cylinder extends and rotates around the lever shaft 8 through lever 2, driving two fingers 4 to move outward in a straight line on the guide rail 5 through a set of steel balls 3. Then the two fingers spread apart and the workpiece is released. The stop block 6 restricts the finger opening stroke, and the positioning pin 7 ensures that the linear guide rail is not in position.
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