Tandem press line

The features of a Tandem Press line are:

• High productivity in continuous mode that allows rates of up to 21 medium and large-size parts per minute in XL lines and L lines..
• Total pressing force depending on the number of presses and the tonnage of each one. Head press typically between 25,000kN and 20,000kN in XL lines and 20,000kN and 12,000kN in L lines and following presses between 18,000kN and 10,000kN in XL lines and 8,000kN and 12,000kN in L lines.
• The presses can be conventional mechanical presses or they can be Servo mechanical; or even a mix of both. Hybrid configuration allows the drawing performance to be improved barely reducing the total part throughput.
• The stroke of the press will be designed to allow space for the automation to unload and load parts, thus optimizing cycle times.
• The dimensions of the presses can be between 3,600 mm x 1,800 mm, up to 5,000 mm x 2,600 mm, capable of processing medium and large car parts.
• The installation is capable of handling 4,300mm x 2,100mm blanks, weighing around 60 kg each.
• It is also able to work with double blanks with dimensions of 2,000mm x 2,100mm and 30 Kg each.
• The lines can be additionally supplied with automatic dimensional quality control and automatic parts racking system.

e-cushion

The cushion is one of the main areas of improvement in terms of reducing energy consumption and regenerating energy. The hydraulic cushion, a technology in which FAGOR ARRASATE is one of the market leaders, is a product with great potential of improvement in terms of energy efficiency.

Considering that servo presses have an increasing presence in the international market, we have developed a new cushion concept. This new concept, the e-cushion, replaces hydraulics with electric servo motors and uses a rack-and-pinion mechanism to transform the electric energy of the servo motor into the mechanical force required for the die drawing process. The payback time can be as short as 32 months.

This solution, of which we already have references in the market, allows us to create an ideal architecture in presses which feature servo technology in the main drive of the press and have a cushion in the bed. The energy efficiency of the press improves by up to 50% (increases the more the cushion is used) for some parts compared to its hydraulic cushion predecessor.

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