Structural Design And Optimization Of A Hot-Forming Die For A Special-shaped Part Of A Composite

As an important benchmark of a country's scientific and technological level,the aerospace industry has a leading position in the industry.In the process of repairing and designing damaged hot press molds for a certain aerospace institute,I contacted and learned about the advantages of simple,stable and efficient hot press mold processes,which have been widely used in aviation parts.However,in the development process of the modern society mold industry,the pace of hot pressing molds is too slow,staying at the technical level of more than ten years ago,few people have studied.Therefore,this paper optimizes the structure of the hot-pressing mold designed to provide research technical theory for the accuracy of the aerospace composite plastic parts and the extension of the service life of the mold.In this paper,the design of this hot press mold,although the structure is relatively simple,but its molded plastic parts have multiple complex curved surfaces,which have extremely high requirements for accuracy,but the precise parameters of the worn mold are seriously lost.Therefore,using the forward and backward fusion concept,through the three-dimensional software forward and backward technology,jointly establish a numerically accurate mold model.Increased flexibility at the design level.In addition,the processing technology is the biggest factor that affects the structure of the hot press mold.In this paper,the finite element theory analysis is used to establish the thermal-stress coupling model through the ABAQUS simulation software,and the impact of the residual stress generated in the metal material during the molding stage on the mold structure is discussed.By analysing the thermal stress and springback of the mold,it is concluded that the part with the most contact surface bears the largest stress value,so as to find the part that needs to be optimized in the mold mechanism,and discuss and determine the appropriate optimal design plan.In view of the optimization of the structure of the hot-pressing mold in this paper,the processing life cycle of the hot-pressing mold is improved,which not only makes the research of the rationality of the hot-pressing mold structure a step further,but also provides a favorable theoretical reference for the possible redesign in the future.