在汽车和拖拉机上,有很多供油系统的输油管和刹车系统的空气管,它们随着所处的位置和设计要求,这些管子都需要弯曲成一定的形状。弯曲管子的工序,是比较困难的,因为弯曲这些虽然直径不大的钢管或铜管,都需要付出很大的体力劳动量。特别是在大批生产的情况下,希望有一种适用的工具来代替或减轻这种强的体力劳动。在汽车拖拉机工厂中,很成功地运用气动的弯管夹具和一些手动的弯管夹具,因而显著地减轻了弯管工人的体力劳动;并且在很多实例中,运用这些弯管夹具,显著地缩短了这一工序的时间,因而获得了高的生产率。第一汽车厂里使用这种先进的弯管夹具的经验是值 In cars and tractors, there are many oil pipes for oil supply systems and brake systems. These pipes need to be bent to a certain shape as they are located and designed. The process of bending the pipe is more difficult because of the large amount of manual work required to bend the steel or brass pipes, although they are not large in diameter. Especially in the case of mass production, it is desirable to have a suitable tool to replace or lessen this strong manual labor. In automotive tractor factories, pneumatic elbow clamps and some manual elbow clamps have been successfully used, thus significantly reducing the manual labor of elbow workers; and in many instances, the use of these elbow clamps significantly shortens The timing of this process has led to high productivity. The experience of using this advanced elbow fixture in the first car factory is worth