Press drives

At first glance, servo presses are quite conventional presses. In fact, they can be designed as single-column, dual column or double-column presses. They work with a torque or servo motor instead of hydraulics or simple electromechanics. These special electric motors have two advantages: high-precision controllability and very high torques, and thus pressing force availability.

These finely adjustable pressing forces can of course be used universally for pressing and punching. However, servo presses offer yet another application possibility that has not been exploited with presses until now: Joining is possible with servo motor driven presses. Joining was previously reserved for gluing, riveting, screwing and welding processes. However, the servo press offers another possibility to permanently connect two separate metal components: Joining by plastic deformation. Very high pressures are concentrated on a small point. The materials practically “flow” into each other. This makes this joining process quite similar to spot welding, but differs considerably in some respects. Joining by plastic deformation is “colder”, more precise and less invasive. The “colder” mode of plastic deformation makes it ideal for joining thin sheet metal parts. It avoids the baking of holes and material distortion due to point-like heating. This makes joining with a servo press an ideal process for assembling fine and sensitive sheet metal products.