Mathematical modeling of direct extrusion power parameters of low-melting materials

It is extremely important to determine the technological parameters of the process when extrusion low-melting materials. We developed a mathematical model of wire and rods direct extrusion from low-melting materials, which allows us to determine the energy-power process parameters. The mathematical model adequacy was checked during a laboratory experiment on a hydraulic press. The force and speed of extrusion were measured and recorded in laboratory conditions using the data collection system installed on press. The adequacy check was carried out by extrusion ø8.00 and 15 mm rods and ø2.00 mm wire. Result showed a high precision of calculations with experimental measurements. The error did not exceed 10 %. The obtained mathematical model was used for analytical studies of rods and wire direct extrusion technological modes of from POIn-52 alloy. Calculations showed that a decrease in the diameter of the finished bar (wire) from 16.00 to 2.00 mm while keeping a workpiece size of ø30.00 mm leads to an increase in the extrusion force from 86 kN to 131 kN at the initial moment of extrusion, since it is significant from 4 up to 256 increases the drawing ratio. The force when extrusion a bar of ø8.00 mm with an increase in the diameter of the workpiece from 12.0 to 40.0 mm increases from 25 to 171 kN. Conducting analytical studies on the model showed that it is possible not only to study the extrusion process in order to understand the mechanisms of formation of the mechanical and operational properties of the finished rod (wire), but also to design resource-saving extrusion modes for different final products, make an reasoned choice of the required equipment and tools.