Research on on-line high-precision detection technology of outer diameter for piston pins

Jiangsheng Liu; Juan Qian

doi:10.1117/12.2625432

12 December 2021 Research on on-line high-precision detection technology of outer diameter for piston pins

Jiangsheng Liu, Juan Qian

Proceedings Volume 12127, International Conference on Intelligent Equipment and Special Robots (ICIESR 2021); 121270C (2021) https://doi.org/10.1117/12.2625432
Event: International Conference on Intelligent Equipment and Special Robots (ICIESR 2021), 2021, Qingdao, China

Abstract

After the grinding process of the piston pin, the outer diameter of the piston pin will be detected by full inspection. The detection requirements shall not produce scratches, the detection rate shall reach 1s / piece, and the limit error of the detection equipment shall reach 0.7μm. Therefore, non-contact high-precision detection must be used to meet the requirements. In order to improve the detection accuracy, carbon fiber tube is used as the reference plane to protect the surface of piston pin from scratches and improve the rigidity of measurements. The measurement error is analyzed, and the overall error is divided into three parts: the error caused by temperature change 𝑒_t , the error caused by the non-perpendicularity of the light and the piston pin 𝑒_v and the error caused by CCD itself 𝑒_d. After adjusting the parallelism between the carbon fiber tube and the piston pin, 𝑒_v is reduced to 0.12μm，a calibration measurement method is developed to reduce 𝑒_d to 0.15μm. A temperature compensation algorithm is developed to reduce 𝑒_t to 0.2μm. Thus the overall detection accuracy is limited to 0.5μm. Finally the high-precision on-line detection of piston pin outer diameter is realized, and the effect is good.

Citation Download Citation

Jiangsheng Liu and Juan Qian "Research on on-line high-precision detection technology of outer diameter for piston pins", Proc. SPIE 12127, International Conference on Intelligent Equipment and Special Robots (ICIESR 2021), 121270C (12 December 2021); https://doi.org/10.1117/12.2625432

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