Structure Optimization Of The High-speed Railway’s Swing Bolster Of Aluminum Alloy And The Research Of Forming Process

With the rapid development of modern transportation, the requirements of railwaytransport vehicle will be high and light weight. High-speed railway has become animportant symbol of modern transportation. Swing Bolster is the key components of trainbogie, it is necessary to posses the quality of stability and reliability for the train operationwith a high speed and safety. The Swing Bolster must have a very high request in theresearch and be guaranteed that Swing Bolster have the enough strength and fatigue ability,and be ensured the Swing Bolster to be good casting properties. Aiming at the High-speedrailway CRH3bogie corbel low pressure casting formability are studied. By computernumerical simulation technology combining with production practice, it can develops thereasonable forming process. Thus people can avoid the blindness of the production andimprove product qualified rate and production efficiency.Firstly, using the three-dimensional modeling software to establish the solid model,and by using the finite element processing software to establish finite element analysismodel. According to the high speed train load calculation standard(UIC615-4、EN12663),obtained the load value of each place. Using the finite element analysis software (ANSYS)to calculate the static strength of two kinds of standard supernormal load condition ofSwing Bolster,13kinds of operation load condition and modal, to prove the Swing Bolsterstructure design is reasonable, conforming to the requirements of the material EN421000.The casting structure strength and manufacturability analysis provide the basis for thedevelopment of the forming technology. Through the theoretical calculation and computerCAD/CAE to pouring system and process parameters have been optimized, obtained theoptimum of the process parameters, such as pouring temperature of710℃, mouldtemperature of450℃, lifting pressure is0.035MPa, lifting time for30s, filling pressure is0.055MPa, filling time of40s, crust time for5s, boosting pressure is0.08MPa, chargingtime of10s, dwelling time for12minutes. And according to the reasonable gating system,the metal mould can be designed. Through the actual production, can prove that the rationality of the design of processparameters. The measure of air tightness and chemical composition, defect detection,micro structure and the mechanical properties of materials conform to the design standard.