图示是美国洛克惠尔国际公司为马歇尔宇宙飞机中心所研制的一种薄壁管膨胀器。在阶梯金属杆上滑套了一个外径比管子内径略小的金属套筒,在套简与杆子台肩面之间还安放了一个弹性套筒。当向金属套筒施加一个轴向力时,弹性套筒就受压膨胀而迫使 Pictured is a thin-walled tube expander developed by Lockheed Martin International for the Marshall Space Center. A metal sleeve with an outer diameter slightly smaller than the inner diameter of the pipe is sleeved on the stepped metal rod, and an elastic sleeve is also arranged between the sleeve and the shoulder surface of the rod. When an axial force is applied to the metal sleeve, the elastic sleeve is forced to expand under pressure