Design And Optimization Of Three-dimensional Warehouse For Multi-variety And Small-batch Aerospace Parts

With the continuous development of China’s aerospace industry,the demand for aerospace parts is constantly increasing.Most of the aerospace machining parts are stored in the production site in disorder,and the characteristics of multiple varieties and small batches increase the difficulty of picking and reduce the production efficiency of the enterprise.The automated stereo warehouse has the advantages of high efficiency,small floor space,large capacity,less cargo damage and convenient management,and plays a very important role in production logistics.This paper takes the aerospace machining parts produced by Shanghai Aerospace Equipment Manufacturing Plant as the application object,studies the key technology of automatic stereo warehouse construction for machining parts,and provides technical support for the construction of high-efficiency and high-security automated stereo warehouse.Firstly,the planning and design of the site for constructing the three-dimensional warehouse is carried out,and the overall layout of the three-dimensional warehouse is determined;the annual historical production data is analyzed,the design of the shelf is completed,and the parts are determined to be stored in the form of “box-in-box” and feasibility verification is performed;The key equipment involved in the warehouse was selected;through the analysis of the maximum response time of the entire warehouse system,it was confirmed that the designed three-dimensional warehouse met the requirements.Then,for the limited bearing capacity of the workshop site,and the diversity of the “box-in-box” combination storage method,in order to avoid the unreasonable combination form,the local stress of the shelf is too large,and it is easy to exceed the problem of the ground bearing limit.Three cargo combination methods,such as maximizing the utilization rate of cargo space,maximizing the use of cargo load,and no cargo load,were proposed.The simulations of Matlab proved that each scheme can effectively avoid extreme combinations.In order to facilitate the actual operation and management,the first method to maximize the utilization rate of cargo space is determined as the combined operation method of aerospace parts.Finally,considering the storage characteristics of aerospace parts,by analyzing the potential problems of storage,the stability of the shelf is determined as the optimization target of the storage assignment,and the mathematical model to ensure the stability of the shelf is constructed.The genetic algorithm is used to solve the model.The genetic algorithm is designed according to the actual problem,and the coding,selection,crossover and mutation methods of the genetic algorithm are determined.The model is simulated by Matlab software.The simulation results verify the validity of the model and algorithm,and greatly improve the shelf stability of the three-dimensional warehouse.