Open AccessStudy on straightness measurement technology of slender rod based on time-domain three-point method
Author(s) -
Xinchun Chen,
Mengxue Bi,
Chunyang Xue
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1303/1/012140
Subject(s) - repeatability , point (geometry) , system of measurement , mechanical engineering , reproducibility , time domain , computer science , laser tracker , coordinate measuring machine , key (lock) , accuracy and precision , measurement device , engineering , simulation , mathematics , laser , acoustics , computer vision , optics , geometry , physics , statistics , astronomy , computer security
Straightness is the key geometric accuracy index of the slender rod of key parts of large machinery, which directly affects the manufacturing and installation accuracy, working efficiency and service life of mechanical products. In order to improve the manufacturing precision of the slender rod and overcome the limitations of the existing methods, a method for measuring the straightness of the slender rod based on the time-domain three-point method is proposed. According to the structural characteristics of the slender rod, the measurement principle and the overall scheme of the measurement system are given, and the mathematical model of the straightness measurement is established. Taking the core components of a construction machine as an example, the measurement and comparison of the designed measuring device and the laser tracker are used to prove that the measurement error of the designed measuring device is less than 0.005 mm. The measurement system analysis results show that the R&R of the designed measuring device has less than 10% of the research variation, indicating that its repeatability and reproducibility are good, which further proves that it can be applied to the actual production site.