Research on hydro-pressing of aluminum alloy double cavity profile components

Abstract

Abstract In this paper, double-cavity profiles with variable cross-section characteristics formed by hydro-pressing are studied. The hydro-pressing forming law of aluminum alloy double-cavity profiles is investigated by numerical simulation and experimental methods, and the effects of process parameters on corner filling, height and width dimensions, flatness of rib plate and wall thickness distribution are analyzed. The results show that the lower corner radius of the middle section increases first and then decreases with the increase of the supporting pressure. The upper corner radius of the middle section and the upper and lower corner radius near the two ends of the section increase with the increase of the supporting pressure. With the increase of the clamping force, the size deviation of the component height decreases and the size deviation of the width increases. The double-cavity profiles formed under pressure within 0.25ps had the worst flatness of the rib plate. The use of teflon as lubricant has the best effect on the improvement of thickness distribution. The component with good dimensional accuracy and wall thickness distribution can be formed by using 0.5ps supporting pressure and teflon lubricant. The forming characteristics of double-cavity profiles are summarized, which provides reference for the selection of actual production process parameters.