This study analyzed design factors to maximize energy efficiency, via numerical analysis, through an examination of the characteristics a heating system that uses permanent magnets and is employed for preheating in aluminum cladding extrusion process. The parameters billet heater using are magnetic flux direction, number magnets, clearance, eccentricity. density, current power loss, temperature...

Two-high screw piercing of steel 50 billets was performed at feed angles 15 and 18 degrees. Piercing stopped 10–12 mm distance from the rear end billet. Axial fracture registered degrees angle in front mandrel nose, while no observed angle. for similar parameters simulated using DEFORM finite element analysis software, several criteria were used prediction. Ayada criterion ineffective, as evide...