The Motional Optimization Of Opening And Closing Mold For Mechanical Vulcanizer

Mechanical Vulcanizers are important facilities in producing tires.There are mo-tional impact during the openning and closing mold of the current mechanical vulcaniz-ers. The optimal design and simulation analyses of the current mechanical vulcanizers were presented and optimal analyzed prototype was manufactured to get the conclusion that the problem of motional impact was resolved.First, the3D soft CATIA was used to model and assemble the parts refering to the current vulcanizers with motinal impact.building up the virtual prototype and simulating it in DMU model of CATIA.Referring to the velocity and acceleration in the result of the simulation.kinematic pair constructed by the beam and wallboard as the main re-search object was taken.The motional impact take place at the tangency point of the two arcs on the transition curve of the main guideway was found out.Combining with the experience of the factory.the reliability of the simulational result and the method that is used to analyze motional impact was verified.There is a large difference of the curvature radius between the two arcs so the impact take place in that point.Second, a new transition curve containing a large number of tangency arcs whose radius decreased according to consine law based on kinematic regulation was designed. The technology of second development of CATIA was used to draw the new transition curve and the new wallborad part was generated.The new virtual prototype of the me-chanical vulcanizer was assembled under the condition that all other motional parts have no changes.Using the conventional rotate speed,the new prototype was simulated and the motional result data with the current were compared.The result demonstrates that the acceleration on the tangency arcs of the G1continuous transition curve of the guideway smoothly transit.In addition, a G2continuos curve that is tangent with the other two lines as the transition of the guideway was designed.The curvature on the end points of the two lines were taken to do multi-objective optimization and the size of the wallboard was optimized.The new virtual prototype of the mechanical vulcanizer was assembled and simulated under the condition that all other motional parts have no changes.The result of the simulation demonstrates that the fluctuation of G2continuos transition is far bet-ter than the current one and slightly better than the former one. Finally, the NC machining code was produced by the CAM technology.Repair welding based on the new size of the wallborad part was taken. The wallborad was processed on NC machine and the whole vulcanizer was assembled under the condition that other parts have no change.The vulcanizer was run under the conventional motor speed.The rusults of simulation by computer and actual operation demonstrate that the vulcanizer with G2continuos transition curve wallboard run smoothly.The new transi-tion curve of the wallboard make a nice solve of the motional impact in the mechanical vulcanizers.