Determination of Force and Pressure Functions for Backward Cold Extrusion of Aluminum Alloy 1350.

A key indicator for the design of cold extrusion technology and materials is the force and pressure required to perform the process under different production conditions. Hence, this work is concerned with finding force and pressure functions of Aluminum 1350 for backward cold extrusion using regression method of experimental data. In order to find force and pressure functions considered, different mathematical formulas are used to obtain the optimum relations where several variables such as cavity diameter, semi-finished sizes, and extrusion strain are taken into account. Lack of data necessary for the calculation of the functions considered, depending on the different technological and construction parameters such as extrusion process, processed material, degree of deformation, form and dimensions of the part, semi-finished product and active elements of the molds requires the continuation of studies and research in this field. Analytical formulas, obtained using regression method, are considered essential for design and optimization purposes concerning backward extrusion for Aluminum 1350. Three different mathematical formulas have been developed for both pressure and force where good agreement has been found when compared to experimental records. Furthermore, cavity diameter and extrusion strain are found to be influential factors that affect the coefficients of force and pressure functions of cold backward extrusion [ABSTRACT FROM AUTHOR]