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三、弧形中心孔弧形中心孔的出现,是历来所采用的标准圆锥形中心孔结构改革的重大突破。它的主要特点是定位精度高,刚性好。 1.弧形中心孔的结构分析在确定弧形中心孔的结构及分析时,均以标准圆锥中心孔作为参照,并把它称为参照中心孔,相应的尺寸称为参照尺寸,如将D_1为参照直径。以参照中心孔的基本参数为基础,求弧形中心孔的结构尺寸,如R_1、D_0。假设顶尖与弧形中心孔的接触位置相当于参照中心孔圆锥母线的中点,则理论式为:
Third, the emergence of arcuate center hole center hole arcuate, has always been used by the standard conical center hole structure of a major breakthrough in reform. Its main feature is the high positioning accuracy, good rigidity. 1. Arc center hole structure analysis In determining the arc center hole structure and analysis, the standard cone center hole as a reference, and call it the reference center hole, the corresponding size is referred to as the reference size, such as the D_1 As a reference diameter. Based on the basic parameters of the center hole, find the structural dimensions of the center hole, such as R_1, D_0. Assuming that the contact point between the top and the arc center hole corresponds to the midpoint of the reference center hole conical generatrix, the theoretical formula is: