本文介绍一种利用废车床床身（Ｃ６２０－ＣＡ６１４０）改装的结构简单、制造容易、使用方便的拉床，该拉床可解决高精孔、花键孔、键槽的加工问题，生产实践证明效果良好。１主要结构如图１所示，该拉床主要由床身、蜗轮减速箱（或油缸）、丝杠、固定支板、溜板、调心套... This paper introduces a kind of broaching machine which is simple, easy to manufacture and easy to use, which is modified by the use of a waste lathe bed (C620-CA6140). The broaching machine can solve the problem of processing high precision holes, spline holes and keyways. The production proves the effect good. 1 The main structure shown in Figure 1, the main bed by the bed, worm gear box (or cylinder), screw, fixed support, slide, self-aligning sleeve ...