14-11-2014, 02:49 PM
Abstracts: In the present Project a review over the control of parameters in designing extrusion dies and manufacturing products during Aluminium Extrusion Process are discussed. Commercial hot extrusion of aluminium involves different operations, such as die formation, billet preheating and shearing, loading and deformation, stretching and roll correction, age hardening and painting/anodizing. The quality of any extruded product is a function of various factors, such as geometrical dimensions, appearance and regularity of the microstructure, variation of mechanical properties over the extruded length and cross section, and surface finish. Extrusion defects may arise in extruded products from the starting material or billet with the deformation process itself, or from other post-processing measures. As all unacceptable defects involve rework or rejection, they directly lead to production losses. So, an attempt is made to describe various types of product defects in commercial aluminium extrusion, to trace their mechanical and metallurgical causes, and to suggest viable corrective/preventive measures. The main objective of the project is to suggest some key parameters affecting the surface quality of the extruded product in aluminium extrusion.