Design and Implementation of a Portable Hydraulic Blanking Press

Abstract

The design, construction and performance evaluation of a portable blanking press was carried out. The aim was to design and fabricate a portable blanking press and to carry out performance evaluation of the fabricated press. This was achieved by blanking mild steel sheet of 100mm and 50mm diameter having a maximum thickness of 2mm by using the two sets of 50mm and 100mm punches and dies respectively and also checking the force required for blanking through a pressure gauge attached to the press. The experimental setup described a blanking press in which a hydraulic jack of a piston and cylinder arrangement is coupled with a pressure gauge. The piston and the press ram are one unit. The ram is actuated by oil pressure on the piston in the cylinder and transmits the action of the ram to the punch which engages the sheet metal and passes through a conforming die. The calculated maximum forces required blanking 2mm mild steel sheet of 50mm and 100mm diameters with the use of their respective punches and dies were determined to be 135.11KN and 270.21KN respectively, while the experimental values were 150KN and 300KN respectively