我厂160吨和300吨摩擦压力机用的模架有两导柱孔(如图1),孔径分别为Φ76D_3和Φ98D_3,要求上、下模座的导柱孔中心线一致。一般是在座标镗床上镗孔,或将上、下模座紧固在一起放在卧式镗床上镗孔。但这两种设备我厂均无,故导柱孔的加工成了关键问题。若靠外厂协 I plant 160 tons and 300 tons of friction press mold with two guide column hole (Figure 1), respectively, the diameter of Φ76D_3 and Φ98D_3, requiring the upper and lower die base of the center line of the guide column consistent. Boring machine is generally boring on the coordinate, or the upper and lower mold base fastened together on the horizontal boring machine boring. However, these two kinds of equipment, I have no plant, so the guide hole processing has become a key issue. If the outside plant Association