Research On Hybrid-driven Injection Molding Machine's Clamping Unit

The main feature of hybrid-driven linkage is to combine the motion of a large constant velocity motor with a small servomotor via a two degree of freedom mechanism. The former provides the main power and motion required, while the latter acts as a motion modulation device. Therefore, the hybrid-driven linkage can provide for programmable motion output.Firstly, the typical kinetic rules and driven scheme of the injection molding machine's clamping unit are reviewed. The scheme of hybrid-driven injection molding machine's clamping unit is put forward. Then the feature of hybrid-driven injection molding machine's clamping unit is analyzed and the feasibility of hybrid-driven injection molding machine's clamping unit is discussed. To begin with the analysis of the link length for a planner five-bar, the type of the planner five-bar linkage is analyzed. Then the forward and inverse kinematics of the hybrid-driven injection molding machine's clamping unit is analyzed by using loop vector method. On the basis of the kinematical analysis, the equations of two crank's balance moment are studied considering the inertia of links.Secondly, The singularity and mobility condition of mechanism by ADAMS are analyzed. Establish simulation figure, put up the Simulation and output the data.Finally, in order to realize the flexible output of the slider, the optimum design of the hybrid-driven is carried out through two major processes. The first process is to optimize the geometric parameters of the clamp unit, on the assumption that the servomotor rotates at a constant angular velocity equal to that of the constant velocity motor. The second process is to optimize the displacement trajectory of the servomotor based on the results of the first process while keeping the geometric parameter unchangeable. The input displacement of the servomotor is separately optimized using polynomial curve.