Ram

The ram serves as the mobile upper structure of the press brake, carrying the punch tooling and providing the downward force that creates each bend. On hydraulic press brakes, the ram is driven by synchronized cylinders on each side of the machine, with the CNC controller precisely managing stroke position to within thousandths of an inch for consistent angle control.

Ram speed is typically variable, fast approach, slow bending speed for accuracy, and fast return, to optimize cycle time while maintaining quality. The rigidity and parallelism of the ram directly affect bend accuracy, particularly on long parts where even slight deflection causes angle variation along the bend length, which is why crowning systems are essential.

CNC press brakes continuously monitor ram position through high-resolution encoders, making real-time corrections to ensure the programmed bend depth is achieved precisely on every stroke.