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一、问题的提出随着其他科学技术的发展,飞机制造准确度也不断提高。相应地对飞机制造所用的标准工艺装备(如量规、标准样件,标准平板)、装配工艺装备(如装配型架、精加工台、对合台、水平测量台)和大的钳工装配平台、检验平台都有较高的精度要求。一般在5×10~(-3)～10×10~(-3)毫米量级。这些工艺装备的第一基准就是水平基准。这个基准的取得主要方法是借助于精密水准测量来实现的。这种用于飞机制
First, the issue put forward With the development of other science and technology, aircraft manufacturing accuracy is also rising. Corresponding to the aircraft used in the manufacture of standard process equipment (such as gauges, standard samples, the standard plate), assembly process equipment (such as assembly-type frame, finishing Taiwan, the Taiwan, the horizontal measuring platform) and large fitter assembly platform, Inspection platform has higher accuracy requirements. Generally in the 5 × 10 ~ (-3) ~ 10 × 10 ~ (-3) mm magnitude. The first benchmark for these process equipment is the horizontal reference. The main method of obtaining this benchmark is by means of precision leveling. This is used for airplanes