A Variable-Speed Approach for Preventing Cam-Follower Separation
The follower separation is a major impediment to the operating speed increase of force-closed cam mechanisms. This problem traditionally is solved by increasing the spring preload or spring rate to enlarge the return force. An alternative approach with variable cam speed is proposed to prevent follo...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2008-02-01
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| Series: | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jamdsm/2/1/2_1_12/_pdf/-char/en |
| _version_ | 1818107977487351808 |
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| author | Hong-Sen YAN Wu-Jung TSAI |
| author_facet | Hong-Sen YAN Wu-Jung TSAI |
| author_sort | Hong-Sen YAN |
| collection | DOAJ |
| description | The follower separation is a major impediment to the operating speed increase of force-closed cam mechanisms. This problem traditionally is solved by increasing the spring preload or spring rate to enlarge the return force. An alternative approach with variable cam speed is proposed to prevent follower separation and thereby to raise the average operating speed. By properly designing the cam speed to change the follower motion, the critical motion characteristics leading to follower separation can be avoided. The cam speed trajectory is expressed using the Bezier function. A mathematical model is developed for analyzing the cycle time and the critical times of follower separation. Then a design model for optimizing the critical average cam speed without follower separation is developed to specify the design parameters of this trajectory. Two design examples with different cam motion programs are given for demonstrating the feasibility of this approach. |
| first_indexed | 2024-12-11T02:08:02Z |
| format | Article |
| id | doaj.art-8e0d95c84ce2465cb6904f854a2c9a92 |
| institution | Directory Open Access Journal |
| issn | 1881-3054 |
| language | English |
| last_indexed | 2024-12-11T02:08:02Z |
| publishDate | 2008-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| spelling | doaj.art-8e0d95c84ce2465cb6904f854a2c9a922022-12-22T01:24:21ZengThe Japan Society of Mechanical EngineersJournal of Advanced Mechanical Design, Systems, and Manufacturing1881-30542008-02-0121122310.1299/jamdsm.2.12jamdsmA Variable-Speed Approach for Preventing Cam-Follower SeparationHong-Sen YAN0Wu-Jung TSAI1Department of Mechanical Engineering, National Cheng Kung UniversityDepartment of Mechanical Engineering, National Cheng Kung UniversityThe follower separation is a major impediment to the operating speed increase of force-closed cam mechanisms. This problem traditionally is solved by increasing the spring preload or spring rate to enlarge the return force. An alternative approach with variable cam speed is proposed to prevent follower separation and thereby to raise the average operating speed. By properly designing the cam speed to change the follower motion, the critical motion characteristics leading to follower separation can be avoided. The cam speed trajectory is expressed using the Bezier function. A mathematical model is developed for analyzing the cycle time and the critical times of follower separation. Then a design model for optimizing the critical average cam speed without follower separation is developed to specify the design parameters of this trajectory. Two design examples with different cam motion programs are given for demonstrating the feasibility of this approach.https://www.jstage.jst.go.jp/article/jamdsm/2/1/2_1_12/_pdf/-char/encam mechanismsfollower separationvariable speedspeed trajectoryfollower jump |
| spellingShingle | Hong-Sen YAN Wu-Jung TSAI A Variable-Speed Approach for Preventing Cam-Follower Separation Journal of Advanced Mechanical Design, Systems, and Manufacturing cam mechanisms follower separation variable speed speed trajectory follower jump |
| title | A Variable-Speed Approach for Preventing Cam-Follower Separation |
| title_full | A Variable-Speed Approach for Preventing Cam-Follower Separation |
| title_fullStr | A Variable-Speed Approach for Preventing Cam-Follower Separation |
| title_full_unstemmed | A Variable-Speed Approach for Preventing Cam-Follower Separation |
| title_short | A Variable-Speed Approach for Preventing Cam-Follower Separation |
| title_sort | variable speed approach for preventing cam follower separation |
| topic | cam mechanisms follower separation variable speed speed trajectory follower jump |
| url | https://www.jstage.jst.go.jp/article/jamdsm/2/1/2_1_12/_pdf/-char/en |
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