在模具生产中,上下模间的定位孔,冷冲模型腔中30～60％和塑料模中10～30％的圆孔,为了得到高精度,淬火前精度愈高愈好,位置精度2～5μm,孔精度提高一级,尺寸留研磨余量,以便在淬火后略有变形,研磨修正后仍能使用。如用座标磨精加工的,要求在变形允许范围内磨削余量以小为好、位置精度0.01～0.05mm,孔余量0.01～0.10 In mold production, the positioning hole between the upper and lower mold, the cavity of the cold die 30 ~ 60% and 10 ~ 30% of the plastic mold hole, in order to get high precision, the higher the precision before quenching the better, the position accuracy of 2 ~ 5μm, the hole accuracy increased by one, leaving the size of the grinding residue, so that after a slight deformation after quenching, grinding can still be used after correction. Such as the use of coordinate grinding, grinding deformation required to allow the margin to small as well, the position accuracy of 0.01 ~ 0.05mm, hole margin 0.01 ~ 0.10