图示为装在车床上的铲背装置。虽然看起来很复杂,其实制造起来相当简单,因为它本身的制造精度要求不高,但却能加工出高精度的工件。 该装置中的零件“A”是一块L型的钢板,其下腿钻有孔(这些孔与机床上原有的装设跟刀架的锥孔相对应),以便装到车床拖板的侧面。L型钢板的上腿有一 Shown is a shovel back mounted on a lathe. Although it looks complicated, in fact, it is relatively simple to manufacture because of its low manufacturing precision, but it can process high-precision workpieces. The part “A” in the device is an L-shaped steel plate with holes drilled in the lower legs (corresponding to the original taper holes in the machine tool) for mounting on the sides of the lathe carriage. L-shaped plate has one on the upper leg