Research On The Optimization Of Injection Mechanism And Energy Saving Design Of Hydraulic System Of 1250KN Hot Chamber Die Casting Machine

Hot-chamber die-casting machine is widely used in mechanical processing because of its advantages of good product quality and high processing speed.However,in practical application,it is found that hot-chamber die-casting machine is also faced with the phenomenon that the injection mechanism will deform and fail during working,which may even lead to the shutdown of die-casting machine in severe cases,which is an important reason for limiting the normal work of hot-chamber die-casting machine.The energy consumption of the hydraulic system of the hot chamber die casting machine is also quite huge.Using asynchronous motor to drive the quantitative pump to work will aggravate unnecessary process energy waste.A large amount of energy consumption in the working process of the hot chamber die casting machine comes from motor consumption.Aiming at the above problems,this thesis studies the problems existing in the injection mechanism and hydraulic system of 1250 KN hot chamber die casting machine by theoretical analysis and simulation verification.The research contents are as follows:Firstly,taking the injection mechanism of the hot-chamber die casting machine as the research object,according to the investigation and literature review,it is known that friction and wear will occur inside the injection mechanism of the hot-chamber die casting machine due to the radial deformation of the cooperation between the punch,the pressure chamber and the gooseneck pot,which in severe cases will lead to the problem of jamming.In order to solve this problem,Solid Works and Ansys Workbench are used to model the injection mechanism,and the fluid-solid coupling numerical simulation analysis is carried out.At the same time,the influence of the temperature of the internal metal solution and the working pressure is considered,and the corresponding boundary conditions are set to solve it.The results show that the heat transfer is the main reason for the radial deformation of the injection mechanism.Then,the results of the above-mentioned fluid-solid coupling analysis are verified by the method of thermo-mechanical coupling numerical simulation analysis.After verifying the reliability of the analysis data results,the response surface optimization design method is used to optimize the structure of the injection mechanism.After the matching degree,Kriging model is used to optimize the structure of the injection mechanism,and the total deformation,mass and equivalent stress of the optimized structure are reduced.By studying the hydraulic system of the hot-chamber die casting machine,it is found that the main reason of energy consumption is that the asynchronous motor drives the quantitative pump to work,but the pressure and hydraulic oil required in each stage of the hot-chamber die casting machine are different.In order to solve this problem,this thesis builds a model of the hydraulic system in Amesim software,and sets the corresponding parameters of its internal oil pump,motor,hydraulic cylinder and various valves.Through numerical simulation,it analyzes the working energy consumption of the original equipment and the hydraulic system after the frequency conversion transformation,and compares them.The results show that the hydraulic system after the frequency conversion transformation has remarkable energy-saving effect,reduces the production cost in the processing process,and provides theoretical support for the energy-saving transformation of enterprises.