件数不多而要求精确的工作物,如果上面附有一条需待加工的半径颇大的圆弧,要是装在大型的车床、铣床上去工作是不大合算的。这里介绍一种简便的制作方法。如附图,工作物装在台面上,台面一端开一条槽,槽中套入一根下部固定在转动台上的螺栓。因此,以摇手柄推动转动台时,上 Small number of pieces and require accurate work, if the above is attached to a radius of the arc to be processed, if installed in a large lathe, milling machine to go to work is not cost-effective. Here is a simple method of making. As shown in the attached drawings, the work piece is mounted on the countertop, a groove is opened at one end of the countertop, and a bolt fixed to the rotary table at the lower part is sheathed in the groove. Therefore, the rocker handle to promote the rotation when the stage