Experimental Study on Hydraulic Pressure Requirements for Stamping Aluminum Sheets of 2–3 mm Thickness

Abstract

The manufacturing industry in Lao PDR often relies on manual mechanical presses, which result in inconsistent production, a defect rate exceeding 20%, and significant safety risks. This study aims to identify the optimal hydraulic pressure for stamping aluminum sheets with thicknesses of 2 mm and 3 mm, in order to enhance production efficiency and address the limitations of manual processes. An experimental approach was employed, using a hydraulic press at varying pressure levels to evaluate the quality of the stamped coins. The results indicate that for 2 mm thick aluminum sheets, an optimal pressure of 8 bar achieved a 100% success rate. For 3 mm thick sheets, a pressure of 7 bar yielded a 95% success rate. These findings demonstrate that replacing manual stamping methods with a properly calibrated hydraulic system significantly improves product consistency, reduces material waste, and enhances workplace safety.