Variable Domain Topology Optimization And Dynamic Analysis Of Clamping Power System Of Injection Molding Equipment

With the increasing demand of injection products in modern industry and advanced science and technology, the market demand for injection molding equipment is increasing rapidly. The template is a key component of supporting and directing injection mold in injection molding equipment. Clamping hydraulic control system is the control and power system of clamping mechanism. Their performance directly affect the accuracy of injection molding products and energy consumption of injection moulding equipment. It is of great significance to analyze and optimize them. In this paper, the analysis and design of front platen and clamping hydraulic control system of injection molding equipment were studied. The static analysis and topology optimization of the front platen are carried out to find the path of force transmission, and a new method of variable region topology optimization based on NCGA algorithm is proposed. An energy saving hydraulic control system for injection molding equipment based on accumulator is proposed. The dynamic and energy saving analysis of the clamping hydraulic control system of injection molding equipment is carried out.The main contents of the dissertation are as follows:In the first chapter, this dissertation first introduces the development history and basic components of the injection molding equipment and its classification. Then the research status of platen design and hydraulic control system of injection molding equipment are summarized were discussed. After that, the research purpose and significance were proposed. Finally, the contents and framework of this thesis were given.In the second chapter, the static analysis is carried out on the injection molding equipment front platen according to the working condition of the injection molding equipment. The maximum node displacement, equivalent stress and strain are obtained. A mathematical model of the front platen structure topology optimization problem was established. The path of force transmission in front platen is obtained by using variable density method.In the third chapter, for the variable domain topology optimization design of front platen, an optimization design method of variable region topology based on NCGA algorithm is proposed. A Pareto optimal solution set of front platen topology Bi-objective optimization problem by using the NCGA algorithm to calculated analysis result of statics and topology optimization on iSIGHT platform. Solving the node displacement and the maximum stress of the double objective optimization, the design of the regional parameter setting. According to the optimization results, the topology optimization is carried out to verify the effectiveness of the design method.In the fourth chapter, the multistage characteristics of pressure and flow of the hydraulic control system of injection molding equipment are analyzed. The dynamic characteristics and energy saving performance of three different hydraulic control system are discussed. Aiming at energy loss problem in the hydraulic control system of injection molding equipment in the period of transition of pressure and flow, a new energy saving hydraulic control system based on accumulator is proposed.In the fifth chapter, the dynamic characteristics of the clamping hydraulic control system are analyzed. Clamping hydraulic control system simulation models based on variable speed pump and accumulator are established. In order to verify the performance of function and energy saving of the new design, analysis on dynamic characteristics and energy saving characteristics is conducted.In the sixth chapter, the further research is put forward after summarizing all the achievements of this dissertation.