在用钻模加工中,对于重量较轻、类似盖板件的中小型零件的孔系加工(见图1),零件的特点是较薄,A面为已加工面,也是主定位面,B面为毛坯面或带有小凸台。对于图1的零件,设计一般钻模,结构复杂,装夹零件不方便,加工精度低。在实践中,我们采用无导套钻模来加工,收到很好的效果。无导套钻模由无导套钻模通用座(见图2)和无导 In the use of drilling mode, for lighter weight, similar to the small parts of the cover plate hole processing (see Figure 1), the parts are characterized by thin, A surface is the machined surface, but also the main positioning surface, B Surface is rough or with a small boss. For the parts of Figure 1, the design of general drilling, complex structure, clamping parts inconvenient, low precision. In practice, we use the guideless drill to process and receive very good results. No guide sleeve die without guide sleeve universal drill base (see Figure 2) and no guide