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(一)基准制的选用 1.通常优先采用基孔制:因孔比轴加工要困难些,用基孔制可减少孔加工用的刀具、量具数量,优点是经济、加工方便;对不必加工的冷拨钢制造的轴,或同一基本尺寸的轴上要装多个不同配合的零件时,可用基轴制。 2.与标准件配合时,依标准件定基准制,如与滚动轴承外圈配合用基轴制,与内圈配合用基孔制。 3.满足配合的特殊要求,如:化工装备中压缩机用得很多,在连杆、活塞与活塞
(A) the selection of the benchmark system 1 is generally preferred to use the base hole system: due to the hole than the shaft processing more difficult to use base hole system can reduce the hole processing tools, measuring the number of advantages of economical, easy processing; Cold dial made of steel shaft, or the same basic size of the shaft to be fitted with a number of different parts, the available base axis system. 2. With standard parts, according to the standard parts of the base system, such as with the rolling bearing outer ring with the base system, with the inner ring with the base system. 3 to meet the special requirements, such as: chemical equipment used in a lot of compressors, connecting rod, piston and piston