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大尺寸丝杠累积误差的检测,需要大尺寸的基础件和能够包容其长度的标准器。我厂生产的一种新型试验机,其中有两种长度超过2m,直径超过85mm的大丝杠,累积误差要求小于±0.1mm。由于本厂没有合适的标准器,(只有一根三等金属线纹尺)。我们采用分段测量的方法,米尺刻度的细分读数利用读数显微镜来实现,基础件则利用一块平板和一只平尺保证了需要。为解决测头定位及读数显微镜的安装问题,加工了一鞍形测量架,测头和读数显微镜都固定在它的上面。测量架跨在丝杠上,利用丝杠的外径,实现了测头的径向定位。显微镜
The detection of the cumulative error of a large-sized screw requires a large-sized base member and a standardizer that can accommodate its length. I plant a new type of testing machine, of which there are two more than 2m in length, diameter greater than 85mm screw, the cumulative error less than ± 0.1mm. Because the factory does not have the right standard, (only a third-class metal line Ruler). We used a segmented measurement method, subdivision readings on the meter scale were made using a reading microscope, and the base part was secured using a flat plate and a flat foot. In order to solve the problem of the installation of the probe positioning and reading microscope, a saddle shaped measuring rack is fabricated. Both the probe and the reading microscope are fixed on it. Measurement span across the lead screw, the use of the outer diameter of the screw to achieve the radial positioning of the probe. microscope