“Smart” blank holder

Each die has a blank holder, which is lowered by means of a hydraulic linear actuator with adjustable pressure; it holds the sheet in place during flanging operations, which is essential in ensuring the quality of the product. In order to optimise the stroke of the actuators and therefore machining times, the blank holder is made to rise up to the maximum height only for the changeover: during production, it stops at a predefined height.

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