我厂在加工自来水表铸铁表壳的M80×2外螺纹时,设计制造了简易可靠的自动退刀机构,并使用机夹硬质合金成型刀加工,效果较好,大大提高了加工效率。结构及工作原理(如图1):表壳1由具有专用钳口的双动虎钳夹紧,装卡在车床卡盘上。退刀机构,由支撑板12夹持在方刀架上,经尺寸调整后即可使用。 I plant in the processing of water meters cast iron case M80 × 2 external thread, the design and manufacture of simple and reliable automatic retractor, and the use of folder folder carbide cutting knife processing, the effect is better, greatly improving the processing efficiency. Structure and working principle (Figure 1): The case 1 is clamped by a double-action vise with a special jaw and mounted on a lathe chuck. Retraction mechanism, supported by the support plate 12 in the square knife holder, can be used after the size adjustment.