A SIMPLE NUMERICAL MODEL FOR REAL TIME DETERMINATION OF TEMPERATURES AND PRESSURES DURING GLASS LUBRICATED HOT EXTRUSION

摘要

A numerical model has been developed for analyzing temperatures and pressures in glass lubricated hot extrusion. It uses a finite difference method to perform heat transfer analysis and is able to track temperatures during both billet transfer and extrusion stages. The model needs as input, only the processing conditions, material properties, and the geometries of the workpiece and the dies. The temperatures and pressures predicted by the model compare very well with experimental observations and finite element simulations. In addition, the computational time needed by the model is a small fraction of that required by a typical FEM model. This approach makes it possible to perform a quick real time analysis of the temperatures and pressures in the glass lubricated hot extrusion process.