机床主轴箱体孔基准标注的选择

Reference mark of the bore in spindle headstock

本文介绍了机床主轴箱体孔零件基准标注的两种形式。应用数学推导法证明了以装轴承的两轴孔的公共轴线为基准时使位置误差偏移值最小,又符合实际装配、加工、测量工作条件,最后得出主轴箱体孔标注以公共轴线为基准最好。

Two forms of the marking norms of machine headstock bores are expounded m tins paper. Applying mathematical derivation method, we deduce a conclusion that setting common axis of two bearing bores for installing bearings as the assembling norm can make the offset of position error get minimum value and meets the conditions of actual assembling, machining and measuring operation, in the end we draw a conclusion that setting common axis as the assembling norm of headstock bores marking is optimal.