Patent ID: 9555465
Date: 2017-01-31
CPC Classifications: B21F

Claim:
1. A drawing and/or straightening unit for feeding simultaneously two or more oblong metal products to a machine for working said metal products, comprising at least a first driven roller having a drawing wheel provided with two or more circular throats inside each of which are able to be positioned respective metal products, two or more second contrasting rollers, independent from each other in movement and opposite said first roller with respect to an axis of feed of said metal products, each of said contrasting rollers being adapted to keep one relative of said metal products correctly positioned in the relative throat of said first roller during feed, and actuator means operationally associated with said second rollers, and able to move, at least in the initial positioning step, said second rollers with respect to said first roller, in order to vary the distance between said second rollers and said first roller, wherein said actuator means comprise a first linear actuator common for all the second rollers, and two second linear actuators each for a relative second roller, each of said second linear actuators being connected to one respective of said second rollers in order to move the respective second roller linearly independently from another second roller so as to contrast in an independent and optimized manner the relative metal products positioned in the respective throat of the first roller, and wherein said first linear actuator is able to command, for both said second rollers, an initial movement of approach toward the first driven roller, and wherein said second linear actuators are able to carry out the selective and controlled movement of said second contrasting rollers, and hence a contrast is applied to the metal product, substantially continuously during the feed steps, according to the actual sizes of the respective metal product, and wherein the unit further comprises sensor members and/or pressure controllers for commanding the activation of one or the other of said two linear actuators so that they act always at the same pressure.