Metod och anordning för trådmatning

摘要

A method of feeding a wire with a drive roller comprises guiding a bent wire into a guide groove of the driver roller at an angle of at least 0.5° relative to a tangent to the circumference of the drive roller at the entry point of the wire into the guide groove. The wire is pressed into the guide groove, bending the wire during pressing and engaging the wire with the guide groove. The engagement between the wire and the guide groove is maintained along a portion of the groove which is equal at least one diameter of the wire and is no longer than the length of the guide groove. The method further comprises guiding the sire away from the drive roller and straightening the wire by contraflexing it at an angle of at least 0.5° relative to a tangent to the circumference of the drive roller at the exit point. A device for feeding a wire has a drive roller with a guide groove, a guiding mechanism, a straightening mechanism and an engaging device and a pressing-in joint of the wire into the guide groove with at least two pressing-in components. The advantage of the method and device is in achieving higher pushing forces for guiding the wires over long distances, as well as high quality straightening of the wire.