大型机械形位误差检测中的基准及其选择、建立原则

Base Line，its Selection and Setting Principle for Shape and Position Error Measurement or Heavy Type or Machine

在讨论形位误差检测基准建立的一般原则基础上，具体分析讨论；大尺寸机件位置误差检测中基准误差的来源；延伸公差带的传递特点；基准选择建立时容易疏忽而造成不良后果的几个问题。

on base of the setting general principle for discussing shanpe and position error measurement, it is analyzed that is the original resources of basic error in the error measurement of the workpiece with large size, the transforming characteristics of extensible tolerance band and several problems of the wrong results from easy neglect for selecting and setting base line.