Lifetime and meshing-teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear: In case of no-lubrication
The strength of plastic greatly varies with temperature; that is, the strength increases as the temperature decreases. Therefore, the lifetime of a plastic gear can be increased by reducing the meshing-teeth temperature of the gear. The meshing-teeth temperature can be reduced by changing the materi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2017-12-01
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| Series: | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jamdsm/11/6/11_2017jamdsm0081/_pdf/-char/en |
| _version_ | 1818107823333048320 |
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| author | Mikio TAKAHASHI Takayoshi ITAGAKI Hideo TAKAHASHI Takao KOIDE Yuki KOBORI |
| author_facet | Mikio TAKAHASHI Takayoshi ITAGAKI Hideo TAKAHASHI Takao KOIDE Yuki KOBORI |
| author_sort | Mikio TAKAHASHI |
| collection | DOAJ |
| description | The strength of plastic greatly varies with temperature; that is, the strength increases as the temperature decreases. Therefore, the lifetime of a plastic gear can be increased by reducing the meshing-teeth temperature of the gear. The meshing-teeth temperature can be reduced by changing the material of the mating gear from plastic to metal considering that a metal gear will have high thermal conductivity. In this study, we investigated the load-carrying characteristics of an unlubricated crossed helical gear consisting of a plastic gear meshed with a metal gear. We performed gear lifetime experiments and meshing-teeth temperature survey experiments. The results showed that the failure mode of the plastic crossed helical gear was caused by the breakage of the tooth and the rim. Then, we confirmed that the stress ratio could be an index for the lifetime evaluation of the plastic crossed helical gear that could fail by tooth breakage. Additionally, by testing gear pairs with several dimensions, we confirmed that the mean flash temperature could be an index for the meshing-teeth temperature evaluation of the plastic crossed helical gear. Furthermore, we proposed a lifetime estimation method for the plastic crossed helical gear that could fail by tooth breakage and verified the validity of the proposed method based on the experimental results. |
| first_indexed | 2024-12-11T02:05:35Z |
| format | Article |
| id | doaj.art-a3ee8ce9d37146c2bee52a43098127a9 |
| institution | Directory Open Access Journal |
| issn | 1881-3054 |
| language | English |
| last_indexed | 2024-12-11T02:05:35Z |
| publishDate | 2017-12-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| spelling | doaj.art-a3ee8ce9d37146c2bee52a43098127a92022-12-22T01:24:24ZengThe Japan Society of Mechanical EngineersJournal of Advanced Mechanical Design, Systems, and Manufacturing1881-30542017-12-01116JAMDSM0081JAMDSM008110.1299/jamdsm.2017jamdsm0081jamdsmLifetime and meshing-teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear: In case of no-lubricationMikio TAKAHASHI0Takayoshi ITAGAKI1Hideo TAKAHASHI2Takao KOIDE3Yuki KOBORI4Department of Mechanical Engineering, National Institute of Technology, Kisarazu CollegeDepartment of Mechanical Engineering, National Institute of Technology, Kisarazu CollegeDepartment of Mechanical Engineering, National Institute of Technology, Kisarazu CollegeDepartment of Mechanical and Aerospace Engineering, Tottori UniversityAdvanced course of Mechanical and Electrical Engineering, National Institute of Technology, Kisarazu CollegeThe strength of plastic greatly varies with temperature; that is, the strength increases as the temperature decreases. Therefore, the lifetime of a plastic gear can be increased by reducing the meshing-teeth temperature of the gear. The meshing-teeth temperature can be reduced by changing the material of the mating gear from plastic to metal considering that a metal gear will have high thermal conductivity. In this study, we investigated the load-carrying characteristics of an unlubricated crossed helical gear consisting of a plastic gear meshed with a metal gear. We performed gear lifetime experiments and meshing-teeth temperature survey experiments. The results showed that the failure mode of the plastic crossed helical gear was caused by the breakage of the tooth and the rim. Then, we confirmed that the stress ratio could be an index for the lifetime evaluation of the plastic crossed helical gear that could fail by tooth breakage. Additionally, by testing gear pairs with several dimensions, we confirmed that the mean flash temperature could be an index for the meshing-teeth temperature evaluation of the plastic crossed helical gear. Furthermore, we proposed a lifetime estimation method for the plastic crossed helical gear that could fail by tooth breakage and verified the validity of the proposed method based on the experimental results.https://www.jstage.jst.go.jp/article/jamdsm/11/6/11_2017jamdsm0081/_pdf/-char/engearplasticcrossed helical gearlifetime estimationtemperature |
| spellingShingle | Mikio TAKAHASHI Takayoshi ITAGAKI Hideo TAKAHASHI Takao KOIDE Yuki KOBORI Lifetime and meshing-teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear: In case of no-lubrication Journal of Advanced Mechanical Design, Systems, and Manufacturing gear plastic crossed helical gear lifetime estimation temperature |
| title | Lifetime and meshing-teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear: In case of no-lubrication |
| title_full | Lifetime and meshing-teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear: In case of no-lubrication |
| title_fullStr | Lifetime and meshing-teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear: In case of no-lubrication |
| title_full_unstemmed | Lifetime and meshing-teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear: In case of no-lubrication |
| title_short | Lifetime and meshing-teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear: In case of no-lubrication |
| title_sort | lifetime and meshing teeth temperature of a crossed helical gear consisting of a plastic gear and a metal gear in case of no lubrication |
| topic | gear plastic crossed helical gear lifetime estimation temperature |
| url | https://www.jstage.jst.go.jp/article/jamdsm/11/6/11_2017jamdsm0081/_pdf/-char/en |
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