Pneumatic Presses
Pneumatic Presses, also known as Air Presses or Pneumatic Presses, generate the working stroke of the press ram as well as the return stroke by applying compressed air to pneumatic cylinders. A press unit can be driven by one or more cylinders arranged side by side or one above the other. The presses act directly or indirectly: In direct-acting presses, the press cylinder directly drives the press ram. In indirect-acting presses Or Toggle Presses, the driving force is transmitted to the press ram via levers. The press force can be continuously adjusted by reducing the input pressure.
Operating principle
In direct-acting pneumatic presses, the working stroke is generated by one or more press cylinders arranged next to or above each other. The upper chambers of the press cylinders are simultaneously pressurized with compressed air and move the press ram up to the workpiece, die or machine stop. The return stroke is affected via the lower cylinder chamber, with which all cylinders are simultaneously moved back up. The press movement provides a uniform force progression over the entire stroke.
In the indirect-acting toggle press, the working stroke is generated by a pneumatic cylinder acting on the pivot point of a toggle lever. The toggle lever is attached to the slide unit with its upper pivot point and to the press ram with its lower pivot point. When compressed air is applied to the press cylinder, the toggle lever is stretched, causing the press ram to move linearly. Just before the lever is stretched, the pressing force increases sharply towards the end of the stroke movement. For the return stroke movement, the lower cylinder chamber is pressurized.
Application area
Pneumatic Presses are used for joining by pressing or forming such as flanging, crimping and riveting, for separating by punching and cutting as well as for embossing, marking or forming. They provide a cost-effective solution for high-cycle applications. Direct-acting pneumatic presses provide a uniform force curve over the entire press stroke, but typically do not achieve high press forces
For higher press forces, indirect-acting pneumatic toggle presses can be used, but they only reach full press force at the end of the stroke.
ACE FLOW manufactures different types of Press, which are as follows:
Under Direct press:
- C-Frame type press
- Single Pillar (Swivel Type) Pneumatic Press
- 2 and 4 Pillar type conventional and Impact pneumatic Press
Under Indirect presses
- Toggle Type Pneumatic Presses and Vises
