Retention Force Of Railway Relay Batch Consistency Robust Design

The relay is responsible for functions such as signal transmission and logic control in the railway system.Due to the complex structure and numerous parts,the dispersion of the part size and the dispersion of the assembly size caused by the assembly process will lead to deviations between the product quality characteristics and the theoretical design values.At the same time,due to the lack of quality consistency design methods,it is difficult to identify the key processes in the batch production process and assign appropriate indicators to them,which greatly affects the consistency and reliability of the product batches,and ultimately affects the safety of the railway system.Therefore,in order to fundamentally improve the batch consistency of railway relay products,this paper aims at the key performance of magnetic retention,and conducts batch consistency robust design research.First of all,from the perspective of designing a certain railway relay product,the assembly model of the railway relay is established using 3D modeling software combined with manufacturing process data,and the finite element simulation software and multibody dynamics simulation software are used to analyze the suction and reaction characteristics of the relay.Use interactive co-simulation method to analyze the dynamic characteristics of the relay,and verify the virtual prototype model built in this paper according to the measured data,and provide a virtual prototype simulation platform for the subsequent optimization design.Secondly,based on the working principle of the relay and the production,assembly and debugging process,the key input parameters and output performance parameters of the electromagnetic system are studied and analyzed;the Kriging method is used to construct the electromagnetic system rapid calculation model,and the deformation energy method is used when constructing the contact spring system rapid calculation model.Use virtual prototype analysis results to verify its accuracy.Combine the relay design drawings and manufacturing process data to construct batch virtual samples,use the quick calculation model to calculate and analyze its quality characteristics,and provide a rapid calculation platform for subsequent batch product quality characteristics evaluation and optimization design.Then,in view of the imbalance problem of the magnetic retention force in the fixed and reversed state of the railway relay,the mechanism is analyzed and the optimization objective is to balance the fixed and reverse magnetic retention force.The key input and output parameters are selected,and the fast calculation model is used to analyze each factor.Single-factor analysis and two-factor interactive analysis,match the optimization plan and produce the optimized relay prototype to verify the effectiveness of the optimization plan.Finally,in view of the poor batch consistency of railway relays and the lack of quality consistency design methods,the magnetic retention is used as the performance optimization goal to construct a quality loss model;the cost model,the construction method of the variable contribution rate model and the incremental iterative global optimization are studied.The method intends to realize the tolerance design of railway relays under the minimum cost increase,and improve the consistency of magnetic holding force batches,and compare the results with the traditional tolerance design methods to verify the effectiveness of the new method proposed in this paper.