Numerical and Experimental Study on cold rolling process of 5B02 aluminum alloy tubes

Abstract

Taking the rolling of 5B02 aluminum alloy tubes in Pilger LG50 mill as an example, the finite element analysis of the tube rolling process was carried out by using ABAQUS software. The effects of rolling speed, rotary angle and feeding amount on the inner wall stress of the tubing and the dimensional accuracy and ellipticity of the finishing section in the forming process of Pilger rolling of 5B02 aluminum alloy tubes were investigated through the orthogonal test. The optimal process parameters were preferably selected for the experimental validation. The results show that the stresses in the inner wall of the wall-reduced section of the billet are the highest during the whole rolling process. The average stresses in the inner wall of the reduced wall section of the billet are in the following order: feed>rotary angle>rolling speed. The feed and rolling speed have a greater influence on the dimensional accuracy and ovality of the finishing section. Excessive rotary angle can lead to grid distortion in the reduced-wall section of the billet. The 5B02 aluminum alloy tubes rolled at a rolling speed of 1989mm/s, a rotary angle of 57°, and a feed of 2.5mm meet the requirements of dimensional accuracy, internal surface quality, and metallurgical structure, and improve production efficiency.