Prediction Method of Fatigue Life of Cylindrical Cam Rollers in Pin Insertion Mechanism
[1]WANG Xinglong,TAO Zongjie,YANG Boxin,et al.Prediction Method of Fatigue Life of Cylindrical Cam Rollers in Pin Insertion Mechanism[J].Journal of Zhengzhou University (Engineering Science),2023,44(04):41-47.[doi:10.13705/j.issn.1671-6833.2023.01.017]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
44卷
Number of periods:
2023 04
Page number:
41-47
Column:
Public date:
2023-06-01
- Title:
- Prediction Method of Fatigue Life of Cylindrical Cam Rollers in Pin Insertion Mechanism
- CLC:
- TH132.47
- DOI:
- 10.13705/j.issn.1671-6833.2023.01.017
- Abstract:
- Taking the high-speed pin insertion machine as the research object, the mechanical analysis of its pin insertion mechanism is carried out, the cylindrical cam groove surface equation is established. The contact mechanics model of the cylindrical cam roller and the groove, and the geometric model of the roller rolling in the groove are established. Based on Hertz contact theory, the maximum contact stress of the contact point between roller and groove is calculated at each moment in the course of the cam rotation. Based on the Miner linear fatigue cumulative damage theory, the dangerous point in the circumferential direction of the roller is judged, and the dangerous point is taken as the object to realize the quantitative calculation of the fatigue life of the roller. Through a specific example, the influence of roller diameter, cam diameter, contact length, and cam rotation speed on the contact fatigue life of the cam roller is illustrated. The calculation results show that: when the diameter of the cam roller increases from 10 mm to 26 mm, the fatigue life increases by 14. 1 times; when the diameter of the cam increases from 50 mm to 140 mm, the fatigue life increases by 7. 5 times; when the contact length increases from 5 mm to 15 mm, the fatigue life of the cam roller increases by 26. 0 times; when the cam speed increases from 600 r·min - 1 to 1 300 r·min - 1 , the fatigue life decreases to 0. 449% of the original.
- References:
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Last Update:
2023-07-01