Original scientific paper

https://doi.org/10.17559/TV-20160525162728

Applications of computer vision in measuring total cumulative pitch deviation of a gear

Dong-yuan Ge ; School of Mechanical Engineering, Guangxi University of Science and Technology, No. 268, East Central Avenue, Chengzhong Distract, Liuzhou city, Guangxi Prov., China, 545006
Xi-fan Yao orcid.org/0000-0002-2712-0411 ; School of Mechanical and Automotive Engineering, South China University of Technology, No. 381, Wushan Rd., Tianhe Dist., Guangzhou, Guangdong Prov., 510640, P. R. China
Zhao-tong Lian ; Faculty of Business Administration, University of Macau, Av. Padre Tomás Pereira Taipa, Macau SAR, P. R. China
Hai-zhi Wang ; School of Marine Engineering, Jimei University, No. 185, Yinjiang Rd., Jimei District, Xiamen City, Fujian Prov. 361021, P. R. China
Tao Tao ; School of Mechanical and Automotive Engineering, South China University of Technology, No. 381, Wushan Rd., Tianhe Dist., Guangzhou, Guangdong Prov., 510640, P. R. China

Abstract

As the basic part of the mechanical transmission, gears should have high transmission accuracy, so the gear’s precision measurement is a key technology. Based on the existing research, the computer vision technology is introduced in gear test. According to the definitions of technical indexes, such as pitch deviation, tooth thickness deviation, etc., through analysis and research, a new measurement method is proposed, so as to complete the determination of the modulus, tooth number and total accumulated pitch deviation of a gear. In the proposed methods, those indexes such as the pitch and tooth thickness, are measured in arc length, rather than in chordal length, so that they are consistent with their definitions. And the measured points can be positioned on the reference circle of a gear while the pitch and total accumulative pitch deviations are examined. Finally, a gear is measured with the proposed method. The main test is obtained as follows. The single pitch deviation is 10,3 μm, total cumulative pitch deviation is 44,8 μm, and tooth thick deviation is 5,2 μm. The experiment demonstrates that the proposed method is feasible and effective, and can meet the precision need of engineering practice. This study provides a new solution method for the gear’s on-line measurement.

Keywords

computer vision; involute; reference circle; tooth thickness deviation; total cumulative pitch deviation

Hrčak ID:

174702

URI

https://hrcak.srce.hr/174702

Publication date:

10.2.2017.

Article data in other languages: croatian

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