液力成形在运载火箭增压输送系统中的应用

摘要

为了解决长征系列运载火箭增压输送系统零件成形过程中的难题，综述了运载火箭增压输送系统研制瓶颈，并针对异形接头、三通、波形管等零件的液力成形及其在航天中的应用进行了分析，通过数值模拟分析了进给量、内压、胀形方式对零件成形的影响，最后确定了零件的加载路径，并给出了该技术在航天制造领域推广应用的实际意义。%In order to solve the forming process problem of the pressure delivery system parts in Long March series carrier rockets, hydroforming technology was used in this paper. Traditional forming problems of pressure delivery system parts were reviewed. Besides, hydroforming technology in forming special-shaped connectors, three way pipe, waveform-shape tube and its advantage in aerospace were analyzed. By using numerical simulation, forming parameters such as feed rate, internal pressure and bulging methods were researched in experimental test. Finally the right load path was determined and the practical significance of hydroforming technology in aerospace manufacturing was given.