The Front Opening And Closing Mechanism Structure Optimization

The front opening and closing mechanism is mainly used to train shunting operation in non normal traction conditions,the front cover can 'conveniently realize the opening and closing,in order to realize the coupler coupling.It can maintain a close and lock the front cabin cover and the coupler,air pipe connecting device hidden in the front cover during normal operation.And the two train,even after the hatches keep hanging hook opening and self-locking.250 kilometers per hour EMU level with the front end opening and closing mechanism design from abroad,the domestic implementation of operation in China after loading The design optimization of this mechanism is the research purpose of this paper.In this paper,the following four aspects of the speed of 250 kilometers per hour EMU with the front end of the opening and closing mechanism to optimize the existing programs,so as to achieve localization and optimization of the purpose of this.First of all,to build a complete three-dimensional model of the original mechanism,that is,data reduction.DMU motion simulation based on CATIA 3D model;Master the movement principle and main design parameters;Record key components;identify vulnerable parts;The optimization scheme is proposed according to the characteristics of the material,and the material strength is analyzed by comparing the performance of the material.Secondly,the welding feasibility and accessibility of the main frame and the suspension bracket can be guaranteed by the multi function welding tool.By sandblasting,annealing process release welding structure stress after welding,'reduce the deformation amount;in order to ensure the accuracy of the installation size,the whole machining process;installing wing using alternative integral machining molding,reduce processing costs,reduce material waste.Third test prototype production and failure mode of parallel computing,the function of prototype test,static load test,high temperature test,durability test,vibration test and type test,simulation of vehicle operation,safe and reliable performance considering the optimization of mechanism.The structure of.the failure mode effects and criticality analysis,obtains each sub component failure probability,identify key spare parts and consumable parts,to spare parts,ensure maintenance work follow-up process in the long run mechanism.The final installation in model test car,after more than and 500 days of test line real condition,the real climate environment test,the optimization scheme has withstood the test of safety,no fault;after a new round of bidding work has been put into production qualification.