Modified Sinusoidal Press Drive System

The sinusoidal press drive system takes full advantage of the variable discharge and reversible discharge direction characteristics of the radial piston pump.

It differs from conventional press drive systems where valves are used to control the press operation and replaces it with a system in which the press operating speed and direction is controlled by changing the direction and rate of pump discharge.

The changeover between the compression downstroke and the decompression upstroke is made by the pump itself. This almost entirely eliminates the hydraulic shock normally encountered with traditional valve operated systems and the related maintenance and downtime. Productivity and forge capability are increased dramatically and measurably.

Advantages to the Sinusoidal Drive System :

• The switch between the press downstroke (compression) and upstroke (decompression) is performed at the point of zero pump discharge, eliminating otherwise attendant switching shock. Consequently, vibration and pulsing of associated piping, normally experienced during hydraulic pressure shocks, is almost completely eliminated.
• The press motion in terms of the operating curve is now simplified, making high speed forging possible.
• The press motion and speed are directly and accurately proportional to the pump discharge rate, ensuring a high level of pump response. Also, the accuracy of position control is sharply improved (± 0.04” in terms of product accuracy).
• Since the pump discharge is variable, employing several pumps in proper combination enables the sinusoidal operating curve to be altered o r modified as desired. It therefore is feasible to obtain the correct press motion curves most suited to the customer’s forging operations.
• Energy consumption is up tp 30% less than with conventional press hydraulic drive systems.

State of the Art Sinusoidal Oil Hydraulic Press Drive by WPE

Schematic Representation of an Sinusoidal Press Drive by WPE

Sinusoidal Press Motion :

Conventional Press Motion :

Simply put, a Radial Piston Pump powered Sinusoidal Hydralic Press Drive by Wepuko-Pahnke is the most energy efficient, longest lasting, lowest maintenance, most productive method of providing and controlling mechanical power to a forging press operation. It offers the lowest cost of ownership and greatest Return on Investment for any method of press drive produced anywhere by any manufacturer without exception.

Oil Hydraulic Press Drive by WPE

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