Transactions of Materials and Heat Treatment

Title：Influence of material mechanical properties on ball expanding and connection performance for assembled camshaft

Authors： Qiao Jian Kou Shuqing Lu Qinghua Wang Haonan

Unit： Foshan University Jilin University

KeyWords： assembled camshaft ball expanding mechanical properties Young′s modulus yield strength

ClassificationCode：TG301

year,vol(issue):pagenumber：2018,43(8):144-149

Abstract：

In order to provide corresponding theoretical basis for structure design and material optimal matching of assembled camshaft on ball expanding and connection, the influences of Young′s modulus and yield strength on ball expanding and connection were analyzed by elastic-plastic mechanics, and the ball expanding and connection process was analyzed according to the corresponding stress-strain curve of different material matching. Then, the connection conditions of corresponding cam and shaft for different materials were given，and the expanding and connection experiment was completed. The results show that the key factors in ball expanding and connection process are Young′s modulus and yield strength of cam and shaft, which decide the elastic recovery values of cam and shaft after expanding process. Furthermore, the yield strength of cam and shaft may not be considered when the Young′s modulus of cam is smaller than that of shaft. However，when the Young′s modulus of cam and shaft are approximate，the expanding and connection process can be realized as long as the yield strength of shaft is smaller than that of cam.

Funds：

国家科技重大专项资助项目（2012ZX0409011）；广东省普通高校特色创新项目（2017KTSCX190）

乔健(1980-)，男，博士，副研究员 E-mail：qiaojj99065@163.com

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