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现代机械制造对零件的加工精度提出很高的要求。在加工零件时,工件的加工精度决定于机床——工夹具——和零件本身的性质;此外,零件的多次安装所造成的积累误差也影响工件的加工精度。这种积累误差在加工圆柱表面时,主要表现在各圆柱表面的同心度和夹紧时零件的变形(在一般情况下这种变形主要决定于所选用的夹具结构)。其次,由于机械制造广泛运用了高速切削,机动时间已大为减少,而辅助时间的
Modern machinery manufacturing parts of the machining accuracy put forward high requirements. In the processing of parts, the machining accuracy of the workpiece depends on the nature of the machine tool - the fixture - and the parts themselves; in addition, the accumulation of errors caused by multiple parts of the installation also affect the machining accuracy of the workpiece. This accumulation of errors in the processing of cylindrical surfaces, mainly in the cylindrical surface of the concentricity and clamping parts of the deformation (in general, this deformation depends on the choice of fixture structure). Second, due to the extensive use of high-speed machining machinery manufacturing, maneuvering time has been greatly reduced, and auxiliary time