Horizontal Bull Block HBB
The horizontal HBB bull block pulls the steel wire by means of special capstans, guaranteeing the necessary force for the cold-rolling or stretching process.
It is composed of a robust structure completely closed by sliding doors, inside of which the RC rolling cassettes or STR stretching panels, different capstans, the SRD stress-relieving device and the wire guide units are installed. The capstans are connected directly to a special robust gear box that is driven by an AC motor on the other side.
Cold Rolling Cassettes CR 25 / 30
The cold-rolling cassettes comprise two sets of 3 rolls, arranged to form three equidistant planes. The tungsten carbide rolls are axially and radially adjustable. The cassettes are equipped with a gear system for easy regulation of the opening/closing of the rolls by means of a lever and with an automatic lubrication system. A cooling water circuit serves to reduce the heat produced by the rolling process.
Vertical Pulling Block VBB
The vertical VBB pulling block pulls the wire rod through cold-rolling cassettes. The pulling capstans are installed on the exit shaft of a gearbox positioned in the vertical axis. The number of capstans depends on the number of wire reductions and the use of a stress-relieving device. The VBB is completely closed by safety guards as per EU standards.
Stress Relieving Device SD
The SD stress-relieving device consists of a series of hard metal rolls and mechanically reduces the internal tensions of the cold deformed wire, modifying the mechanical characteristics of reinforcing wire such as ultimate tensile stress, yield stress and elongation.