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Shujun Li, Hongguang Wang, Xiaopeng Li, Hexu Yang, Jiansheng Dai

Original languageChinese
Pages (from-to)26-35
Number of pages10
JournalJixie Gongcheng Xuebao/Journal of Mechanical Engineering
Issue number3
Publication statusPublished - 5 Feb 2018

King's Authors


How to design constraint metamorphic mechanisms according to the requirements of tasks, especially involved with the types of metamorphic kinematic pairs and the ways of constraints, is one of the key issues to be urgently solved during the practical application of metamorphic mechanisms. With the decomposition of the tasks, the corresponding configurations and movement output forms of metamorphic mechanisms are mapped, and as well as the types and constraint period of metamorphic kinematic pairs are achieved. Based on it, a task-based metamorphic mechanisms diagram concerned with the output motions and the constraints is presented. Subsequently, according to the types of metamorphic kinematic pairs as well as their adjacent relations, the movement output forms generated by the augmented Assur groups are summarized. Further, the relationships between the movement forms and constraint combinations of metamorphic mechanisms and the augmented Assur groups are established, which results in a convenient design of source metamorphic mechanisms. Followed by it, the constraint forms and structures of metamorphic kinematic pairs in the constraint metamorphic mechanisms is solved by studying the relationship between the task-based metamorphic mechanisms diagram and the gradien variation of equivalent resistance in the metamorphic mechanisms, which is further applied to the source metamorphic mechanisms so as to achieve whole metamorphic mechanisms with constraint forms of metamorphic kinematic pairs. Then, considering the influences such as process conditions and movement reliability, the metamorphic mechanisms meeting the requirments of the tasks is choosed from them. In the end, the feasibility and effectiveness of the proposed theory and method are demonstrated and verified.

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