基于等距廓形理论的多工位按压机构设计

Design of a Multi-position Pressing Mechanism Based on the Theory of Isometric Profile

为设计按钮疲劳寿命测试装置,提出一种新型多工位往复按压机构设计方案,并详细介绍了传动机构等宽凸轮-框式滑块新的设计方法——基于等距廓形理论,采用数值解析法建立等宽凸轮机构数学模型。通过虚拟样机动力学仿真技术验证了机构数学模型的有效性以及设计方案的可行性,为多工位按压机构未来原理样机研制提供了理论依据,具有一定的工程应用价值。

With the testing system of button＇s life span as background,according to the relevant national standard,a new kind of design scheme on multi-position pressing mechanism was proposed,and its key technologies,such as design method of constant-width cam mechanism with straight moving follower were introduced.Firstly,the overall mechanism design scheme was introduced.Then,based on the theory of isometric profile,the mathematic model of constant-width cam mechanism was established analytically,which was solved with Matlab,and the profile of the proposed constantwidth cam and the motion rules of the follower were obtained.Based on the above calculation results,the 3D modeling was carried out by Pro/E.Finally,the dynamic simulations were conducted by ADAMS software,by which the validity of the mathematical model and the feasibility of design scheme was verified.The obtained results provide theoretical basis for the future prototype manufacture of multi-position pressing mechanism,and has certain significance for engineering applications.