Discussion on process verification of flooring cloth paving for rail vehicles
In response to the problem of bulging on the flooring cloth of rail vehicles,the first class carriage of a certain vehicle model was taken as the research object.The flooring cloth paving structure was"aluminum honeycomb floor + three layers of soundproofing material(undetermined material)+ a certain type of rubber flooring cloth".The optimal welding construction process parameters were optimized through orthogonal experiment.The performance of different types of soundproofing materials and the matching between flooring cloth and soundproofing materials were judged through T-shaped peeling,surface wetting test,thermal expansion deformation rate,etc.The feasibility of the paving process was confirmed through simulation experiment of structural parts in harsh environment.Finally,the process verification of flooring cloth paving was completed based on the above experimental results.The research results showed that,(1)The optimal process parameters suitable for welded rubber flooring cloth were the welding machine temperature scale of 3.0,the speed scale of 2.5,and the air output scale of 2.0.At this time,the tensile strength of the welded joint was the highest and the fusion state was good.(2)Experimental analysis was conducted on the compatibility of soundproofing materials from three dimensions:T-shaped peel strength,surface wettability,and thermal expansion deformation.The results showed that"aluminum honeycomb floor + three layers of rubber soundproofing materials + rubber flooring cloth"basically met the production requirements.(3)The system of"aluminum honeycomb floor + DN341SA + the first layer of rubber soundproofing material + DU345D + the second layer of rubber soundproofing material + DU345D + the third layer of rubber soundproofing material + DN341SA + rubber flooring cloth"had undergone high and low temperature cycling test and continuous high temperature test without any surface bulging and weld cracking of the flooring cloth,indicating that the paving system had strong aging resistance and could meet the needs of rail production and operation.
rail vehiclesflooring clothprocess verificationaging test
NETL
NSTL
万方数据
