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经验表明,影响冲孔模的主要因素是几何误差、导向间隙以及压机底座弹性变形所引起的凸、凹模不同心度。在不同压机上,导向间隙可为0.04～0.12毫米。考虑压机底座弹性变形的影响,凸、凹模的相对偏离量可超过0.1毫米。薄板材料冲孔时,凸、凹模间的间隙为0.01～0.05毫米.因而必须排除或减小上述因素对模具工作的有害影响。除改善压机外,进一步完善模具结构并建立合理的制造和装配工艺也是基本途径之
Experience has shown that the main factors affecting punching die geometrical error, the guide gap and the base caused by the elastic deformation of the punch and die do not concentricity. In different presses, the guide gap can be 0.04 ~ 0.12 mm. Taking into account the impact of the elastic deformation of the press base, convex, die relative deviation of more than 0.1 mm. Sheet metal punching, convex, die gap between 0.01 ~ 0.05 mm.Therefore, these factors must be eliminated or reduced the harmful effects of mold work. In addition to improving the press, further improvement of the mold structure and the establishment of a reasonable manufacturing and assembly process is also the basic approach