Pneumatic presses are used when the manpower is not strong enough to generate the force required, or the number of parts to be machined is too large.
Pneumatic presses are manufactured with various force transission mechanisms. Their movement is based on compressed and dried air. Usually the air pressure applied is in between 3 bar to 6 bar (44 psi to 87 psi). Pneumatic presses reach their nominal force at 6 bar (87 psi). A controller is needed t operate a pneumatic. Normally 2-hand controller are used at manual work stations. In case the pneumatic press is integrated into an automated process a plc takes over the control.
Pneumatic presses are manufactured in three different force transmissions: The toggle mechanism, direct acting, and hydro-pneumatic transmission.
The optimum transmission ratio of the toggle lever produces large forces at the end of the stroke and ensures low air consumption. The relatively high ram speed and the defined length of the stroke are the adantage of the toggle mechanism. Pneumatic toggle presses are therefore especially used for riveting, punching, and adge cutting.