Theoretical and Experimental Investigation of Hydromechanical Extrusion Process

Abstract

The theoretical and experimental investigation of the process of hydromechanical extrusion (HE) of aluminum alloys Al 5056 was carried out. The aim is to determine the optimal parameters of this process. These parameters were determined to minimize the extrusion force and damage factor of a workpiece by using explicit finite elements method. The results were presented in a visual form and were shown that use of active friction forces reduces the extrusion force. Statistical processing of the experimental data gave regression equations for definition the damage factor and the value of the specific extrusion stress.

An intelligent system for improving the process of hydromechanical extrusion

“…The application of hydromechanical extrusion (hereinafter referred to as HE) enables one to create semi-fluid friction of the bar on the container walls and on the die mouth [1]; this provides a favorable action of friction forces since the lubricant velocity exceeds that of the bar [2]. Herewith, extrusion pressure and the degree of strain inhomogeneity decrease significantly, and the bar-tool contact decreases; this is particularly relevant for metals adhering to the tool [1,3].…”

“…As was reported in [2,3], various CAD and CAE systems are used for the implementation of hydromechanical extrusion. Basic tool dimensions are container length and diameter, the taper angle and the length of the parallel land of the die, which were thoroughly discussed in [1][2][3].…”