Quality Mdodeling And Analysis Of Multiproduct Assembly Systems

The rapid development of manufacturing technology and the continuous changes in the market,making the product more and more complex,need to go through a number of processes processing and assembly to complete.The quality of the assembly of the product has little effect on the final performance of the product,and the defects of the assembly process can lead to the waste of the machined parts.Therefore,it is very important to carry out the research and quality control of the assembly processIn this paper,the Markov model of the assembly system is established by using the associated multi-process assembly system as the object of study.Considering the quality impact of the upstream process and the product diversity,the relevant quality characteristics analysis and case analysis are carried out to verify the model The practicality and accuracyThe main work of this paper is as follows:(1)The Markov model of the single product assembly system with two process steps is established,and then the combined system is used to extend the assembly system model of the two processing steps The single product assembly system model with multiple assembly processes is used to verify the model with good accuracy and the monotonicity and sensitivity analysis are carried out by numerical simulation experiments.The practicality of the associated multi-assembly process model is verified by the assembly system of a factory’s aerospace valve.Finally,the traditional Markov model,which does not take into account the quality transfer between processes,is compared to further validate the accuracy of the model.(2)The Markov model of multi-product-related multi-process assembly system is extended to multi-product-related multi-process assembly system,and a multi-product correlation multi-process manufacturing system Markov model is established.Subsequent case studies explain how the model can be used to solve the system pass rate in different production sequences.(3)Based on the Markov model,the quality characteristics of the assembly system under Bernoulli production were analyzed.First,the production sequence analysis,through the analysis can be made to make the system the highest rate of production order,studied the Bernoulli conditions of product quality fluctuations,found that the optimal production order of the product and the product batch does not matter.At the same time,the bottleneck analysis method and the internal and external bottleneck judgment factors of the multi-product assembly system are put forward.The value of the internal bottleneck judgment factor is related to the batch and transfer probability,and the value of the external bottleneck judgment factor is only related to the transition probability.(4)Developed the product quality modeling and analysis system of multi-process manufacturing system,introduced the system development structure and the function of each module,and the system can realize the related multi-process manufacturing system production quality analysis and so on.