Die cushion drive saves up to 80% energy

1st Quarter 2015 Electrical switching & drive systems & components

With its new CSH die cushion drive consisting of servo pump and double-acting die cushion, Voith has launched an innovative drive concept for demanding forming processes. The CSH die cushion drive needs no valves and reduces energy consumption of the press significantly. In combination with the efficient PSH press drive, press operators can save up to 80% energy.

With conventional die cushion drives consisting of a die cushion and pressure-relief valve, the work of the die cushion is irretrievably lost. In contrast, the Voith system feeds the mechanical power of the servo pump back to the process through the motor in the form of electric power. This reduces energy consumption and makes previously unattainable overall energy efficiency levels achievable. Furthermore, the servo-hybrid CSH die cushion drive uses a smaller oil reservoir, less oil and requires no costly cooling.

The die cushion drive with double-acting die cushion is ideal for forming processes involving complex geometries. The CSH provides exceptional repeatability. In addition, the CSH is freely programmable in terms of speed, force and position control, and acceleration. The result is not only increased process variability, operators also benefit from increased productivity while simultaneously improving the quality of the parts produced.The accelerated die cushion adjusts to the position-time curve of the ram and, in contrast to a single-acting die cushion, reduces tool impact on the workpiece. This improves surface quality, protects the machine and tool, and prevents damage such as cracks and creases on the workpieces.

For more information contact Terry-Lynn McIntosh, Voith Turbo, +27 (0)11 418 4036, [email protected], www.voith.com

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