S. Yasuda, O. Nakano, Y. Izawa, S. Kondo, M. Onoda, H. Yarita, Y. Koyasu, S. Uchida
{"title":"Development of High Fatigue Strength Spring by Nitriding and Shot Peenig of New Si-Cr-Mo-V Steel","authors":"S. Yasuda, O. Nakano, Y. Izawa, S. Kondo, M. Onoda, H. Yarita, Y. Koyasu, S. Uchida","doi":"10.5346/TRBANE.1997.1","DOIUrl":"https://doi.org/10.5346/TRBANE.1997.1","url":null,"abstract":"High fatigue strength of coil springs for automobiles is intensely required for better fuel economy and weight reduction. For this subject, springs have been developed in terms of both material and processing sides. The coil springs developed with combination of the designed material, the advanced nitriding and shot peening processes achieved distinction in fatigue strength. In the present paper, following topics for this development are introduced:1) Spring steels with high resistance to temper softening at nitriding temperature were designed.2) A shot peening technique was developed to increase residual stress on the nitrided surface of springs.3) It was verified that the developed springs had similar notch sensitivity to a conventional spring discussing fatigue strength of the steels using both test wires and spring with artificial defects.4) Fatigue strength of the developed springs was improved approximately 35% as compared with that of the conventional spring.5) Improvement of the fatigue strength was considered to be caused by the nitriding and shot peening which shifted the initial point of fracture to inner side of the material.","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124221426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Guarantee of Fatigue Life of Ceramics Spring after Proof Test","authors":"Shigemi Sato, T. Sone, Y. Kobayashi, K. Ando","doi":"10.5346/TRBANE.1997.61","DOIUrl":"https://doi.org/10.5346/TRBANE.1997.61","url":null,"abstract":"Fatigue life of ceramic materials scatter in a widerange depending on an inherent flaw size. Therefore, it is important to conduct proof test as the procedure to exclude components with flaws, whose size is larger than a certainsize. In this paper, a numerical analysis of sintered siliconnitride were conducted to calculate minimum cyclic fatigue life after proof testing. Its reliability was predicted by the procedure based on 2 parameter weibull distribution of the fracture stress of a smooth specimen and plane-strain fracture toughness value. Cyclic fatigue tests of Si3N4 was conducted after proof testing to compare with a numerical simulation. The numerical simulation coincided with the experimental life distribution.","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122623382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tatsuo Kunimine, S. Yoshioka, K. Matsue, K. Okabe, Masanori Takashimada
{"title":"Elevated Temperature Tensile Strength of thin sheet Phosphor bronzes","authors":"Tatsuo Kunimine, S. Yoshioka, K. Matsue, K. Okabe, Masanori Takashimada","doi":"10.5346/TRBANE.1997.31","DOIUrl":"https://doi.org/10.5346/TRBANE.1997.31","url":null,"abstract":"Elevated temperature and room temperature tension properties of phosphor bronzes containing 4%, 5%, 6%, 7% and 8% Sn, with thickness of 0.3mm are investigated. Results are as follows;1) Serration appears at 473-573K on Load-Elongation diagrams for elevated temperature tension test. And the relation has nothing to do with Sn content. Serration does not appear in case of room temperature tension test.2) Tensile strength does not depend on Sn content above 623K for elevated temperature tension test. Tensile strength depends on Sn content above 723K for room temperature tension test.3) Reduction of area of Sn 4%, 5% reaches to the minimum at 373K and reaches to the maximum at 750K, and that Sn 7%, 8% reaches to the minimum at 623K and reaches to the maximum at 740K for elevated temperature tension test.Shortness temperature area does appear in case of elevated temperature tension test. Shortness temperature area does not appear in case of room temperature tension test.4) There is an inflection point at around 280MPa, HV180 on the curve of relation between elevated temperature tensile strength and Vickers hardness. This relation seems to be represented by two straight lines, and the relation has nothing to do with Sn content.","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123038971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synchronous Cutting of the Solid Springs with Multi-cut Method","authors":"A. Itoh, Takamitsu Imai, K. Tsushima, T. Kunoh","doi":"10.5346/TRBANE.1996.39","DOIUrl":"https://doi.org/10.5346/TRBANE.1996.39","url":null,"abstract":"Akihiro ITOH, Takamitsu IMAI, Kazunori TSUSHIMA and Takahiko KUNOH Manufacturing the solid springs by a synchronous cutting machine with a sheet of cut-off wheel, is available in respect of the working accuracy, but the process is not practical in respect of the productivity in comparison with manufacturing the solid springs by coiling machine. So we try to improve the above productivity by a multi-cut method that the synchronous cutting machine cuts several springs simultaneously with several sheets of cut-off wheel. As a result of this experiment, the productivity (i.e. volume of abrasive wear and cut-off time), the working characteristics of the solid springs (i.e. free height, inclination of coil outside face, burn mark and step), and cutting condition suited for synchronous cutting of the solid springs with multi-cut method were cleared. It was also cleared that the cut-off time for manufacturing one spring in case of two sheets of cut-off wheel (multi-cut method) decreased by approximately 40-45% in comparison with that in case of a sheet of cut-off wheel while the working accuracy in case of two sheets of cut-off wheel was held the same level as that in case of a sheet of cut-off wheel.","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124153923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Trends in Spring Technology and Research Manufacturing, Testing and Inspection","authors":"F. Tanohata, M. Sakamoto","doi":"10.5346/TRBANE.1996.113","DOIUrl":"https://doi.org/10.5346/TRBANE.1996.113","url":null,"abstract":"","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117158813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Suzuki, Syuji Kamiya, Toshiyuki Imaizumi, Yukitomo Sanada
{"title":"Approaches to Minimizing Side Force of Helical Coil Springs in Suspension Design","authors":"S. Suzuki, Syuji Kamiya, Toshiyuki Imaizumi, Yukitomo Sanada","doi":"10.5346/TRBANE.1996.19","DOIUrl":"https://doi.org/10.5346/TRBANE.1996.19","url":null,"abstract":"","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127206571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Shot Peening on Corrosion Behaviors of High Carbon Spring Steel S60C","authors":"K. Sakakibara, M. Kaneko, H. Iwanaga","doi":"10.5346/TRBANE.1996.47","DOIUrl":"https://doi.org/10.5346/TRBANE.1996.47","url":null,"abstract":"the changes of passive state or the state of pitting formation, anodic polarization curves were measured under various applied stresses in undeairated 3%NaCl solution. The main results obtained are summerized as follows; 1) Shot peeved surface becomes electrochemically more stable. 2) Shot peened is depressed the formation of deep pit above 3ƒÊm. Conseguently,the possibility of fracture caused by pitting corrosion should decreased.","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126234006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"FEM Analysis of Hollow Stabilizer with Flat Section","authors":"Naoshi Satoh, Tomio Ogawa, T. Hamano","doi":"10.5346/TRBANE.1996.27","DOIUrl":"https://doi.org/10.5346/TRBANE.1996.27","url":null,"abstract":"Regarding the design of stabilizer bars, the following subjects must be considered in order to obtain highly accurate calculations.(1) Bent shape between mounting areas(2) Flat section of bent area(3) Rigidity of mounting bushIn this paper, Finite Element Method (FEM) was easily applied to account for the above-mentioned factors, especially for hollow stabilizer bars. And availability of FEM analysis was cleared. Considering the flat section of bent areas, an experimental equation for predicting the shape of flattened crosssections was proposed. Also the way in which these three factors influence on a stabilizer bar's charcteristics was confirmed.It was determined that taking the above three subjects into consideration FEM analysis makes it possible to achieve highly accurate calculations.","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124576835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Trends in Spring Technology and Research Standard","authors":"T. Ozone","doi":"10.5346/TRBANE.1998.119","DOIUrl":"https://doi.org/10.5346/TRBANE.1998.119","url":null,"abstract":"","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122481549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Trends in Spring Technology and Research Material","authors":"K. Uchibori, H. Okita, Y. Takada","doi":"10.5346/TRBANE.1997.67","DOIUrl":"https://doi.org/10.5346/TRBANE.1997.67","url":null,"abstract":"","PeriodicalId":406647,"journal":{"name":"Transactions of Japan Society of Spring Engineers","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124729596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}