Abstract
The presented study shows results of structural and kinematic analysis of a planar six-bar quick-return mechanism that is used in shaping and planing machines for transformation of rotational motion of a driving link into prismatic motion of an end-effector. Assur groups of the III and II classes have been separated out from a quick-return mechanism when different driving links have been chosen during a structural analysis. Kinematic analysis has been carried out by grapho-analytical method for the case when a four-bar Assur group is included. Finally, 3D model has been simulated and coordinates of distinguished points of movable links have been found in six positions of the mechanism depending on the rotation of a driving link. The obtained results can be used in kinetostatic and dynamic analysis of the quick-return mechanism. The findings of the study can also be used in a design of planning and shaping machines, in synthesis and analysis of novel planar mechanisms.
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