Investigations on the dynamic characteristics of a planar slider-crank mechanism for a high-speed press system that considers joint clearance

Clearances in the joints of mechanisms are unavoidable because of numerous uncertainties, such as manufacturing tolerances, assembly processes, and progressing wear. The dynamic characteristics of a planar slider-crank mechanism, including clearance joint and balancing mechanism, are investigated in this study using a computational method. A suitable model is built using the simulation software ADAMS, in which actual features, such as contact and friction, are considered. A contact-impact model that incorporates the IMPACT function and that considers energy loss in the contact process, is also built. The experimental platform is established and acceleration experiments on the mechanical system at different driving speeds are conducted. Obtained tests results demonstrate that the dynamic response of a multibody mechanical system can be effectively predicted using the proposed method. Furthermore, the effects of the driving speed of the crank shaft, the size of the joint clearance, and the balancing mechanism on the dynamic characteristics of the mechanism are studied.

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