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Schuler has developed a range of presses that combine the knuckle-joint’s precision with the output performance and flexibility offered by servo technology, for the processing of high-strength steels.

The company’s drive system enables almost shock-free impact of the die, ensuring precisely formed parts and long die service lives.

The company will be presenting the prototype of the servo knuckle-joint press at its in-house fair in Netphen, Germany, on 15-16 June, 2010.

Manufacturing with knuckle-joint presses means that the time-motion curve can be individually programmed.

Servo-drive presses are fast, enable precise forming operations and can be adapted to the respective material and automation process.

The characteristic pendular mode of Schuler’s servo presses is also possible with the new servo knuckle-joint presses.

Stroke heights can be freely programmed, making a complex mechanical stroke adjustment unnecessary.

The MSK range offers customers five different servo knuckle-joint models with press forces of 2,500-10,000kN (250 to 1,000 tonf).

Depending on the particular model, speeds vary from a minimum of three to a maximum of 60 to 160 strokes a minute.

The bolster widths range from 2 to 3.5m and bolster depths from 1 to 1.5m.

All five models’ outputs are significantly higher than the output of conventional knuckle-joint presses.

This is mainly due to the synchronisation of the entire production process.

A freely programmable servo drive can be adjusted to the conditions of the peripheral press equipment.

The transport process within a transfer press can also be optimised with the aid of servo drives.

The actual forming process can also be controlled more precisely on a servo knuckle-joint press.

The machine’s motion sequence can be adjusted to the material’s properties and the respective forming operation.

Applications include: highly precise parts such as cylinder head gaskets and oil-filter lids; structural parts for car bodies; bearers for heavy-duty rollers; embossing, punching, calibrating and blanking operations; and high-strength steel processing.

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