Dynamic analysis of a planar slider-crank mechanism with clearance for a high speed and heavy load press system

In dynamic analysis of a slider-crank mechanical with clearance for a closed high speed and heavy load press, elements are generally assumed to be rigid. The dynamic response is considerably changed as joint clearance and flexibility are introduced. Considering the actual features such as clearance, flexibility and friction, a rigid-flexible model is developed into ADAMS. With energy loss taken into account, the IMPACT function is employed by the contact-impact model to describe the contact response between the journal and bearing. The acceleration experiments of the slider-crank at different driving speeds are carried out. We conduct the dynamic simulations of the slider-crank mechanism and compare the numerical results with experimental data. The results reveal that the rigid-flexible coupling model, compared with the rigid model, is more effective to reflect the dynamic response of the mechanical. Meanwhile, the occurrence of motions can be divided into three types: a free flight, a continuous contact motion, and an impact motion. Furthermore, influence of the linkages flexibility, size of joint clearance, and driving speed of crank shaft on the dynamic behavior of the mechanism are studied.