提高柴油机机体主轴承孔同轴度检测准确度的措施

Measures to Improve Coaxiality Detection Accuracy in Main Bearing Hole of Diesel Engine Block

简要阐述光学自准仪检测柴油机机体主轴承孔同轴度的原理,提出提高同轴度检测准确度的措施,包括提高数据采样准确度和数据处理准确度2个方面。其中提高数据采样准确度包括测量仪器的检查校验、测量环境控制、测量操作控制3个方面,提高数据处理准确度包括注意主轴承孔径在垂直方向的修正、重要计算参数检具桥跨距的作用、同轴度公差定义对计算结果的影响3个方面。应用Excel电子表格软件编制柴油机机体主轴承孔同轴度检测数据计算处理记录表,实现测量数据计算处理的电子化,提高了柴油机机体主轴承孔同轴度检测数据计算处理的速度和可靠性。

The article specifies the principle for an optical autocollimator to detect the coaxiality in a main bearing hole of a diesel engine block. It proposes the following measures to improve the coaxiality detection accuracy, including such two aspects as to improve the data sampling accuracy and data processing accuracy. Notably, the improvement of the data sampling accuracy also covers such three aspects as the inspection and verification of measuring instrument ,the control of measuring environment and the control of measurement operation. The improvement of data processing accuracy also includes to pay atlention lo the correction of main bearing aperture in vertical direction , the role of key calculation parameters for gauge span and the influence of coaxiality tolerance definition on calculation results. Excel electronic form software is applied to prepare the record on main bearing hole coaxiality detection data calculation and processing for diesel engine blocks, which realizes the computerization of measured data calculation and processing, and improves the speed and reliability of main bearing hole coaxiality detect io n data calculation and process for diesel engine blocks.