The Applied Research Of Die Forging Technology And Design And Numerical Simulation

An automobile gearbox shaft part is a key component of the car.With the rapid development of automobile manufacturing industry,the traditional preparation technology cannot meet the market demand.Automobile gearbox shaft class parts have a wide variety,while its appearance structure has a single character,more steps and high quality requirement.As a key component in vehicle transmission equipment,dendrite core axis is widely used in automobile industry.The stress situation in the gearbox is complicated and changeable;therefore,the axle of the vehicle gearbox should have good strength,hardness,impact toughness,abrasion resistance and corrosion resistance to ensure that it works properly during its use.However,the core axis is difficult to form complicated forging,in the process of hot forging,there are many defects such as folding,filling,crack,etc.In this paper,the core axis of automobile gearbox is used as the research object,the core axis is formed by an open die forging method,based on the theory of plastic forming,using finite element numerical simulation technique,Simulation and analysis of core axial die forging process.During the study,the following aspects of the work are completed:(1)A part drawing of a certain type of core forging which is provided according to the actual production of a factory,using the forging theory to design the forging of the core shaft,the size of the initial blank and the corresponding mold,And forging and the mold 3d modeling in the UG modeling software for the core?(2)Combining the industry experience,the billet size is the main parameter.3D finite element simulation software was adopted to simulate the size of the core,verifying that the material in different sizes can be full of forging cavity,to select the desired size of the lower material.(3)Simulate the corresponding temperature field,stress field and metal flow rule were by Deform 3D computer simulation software,and predict the location of its defect.(4)Analyze the results of the simulation,and analyze the influence of different parameters on the temperature,force and flow of billet,to find out the best blank size.(5)Design and manufacture the mold based on the simulation results,and carry out the production test of core shaft heat forging on 63 KJ electrical liquid die forging hammer equipment;Test the core axis products for sampling and performance,and compared with the simulation results.By the physical experiment,the reliability and stability of simulation results are verified.In the process of enterprise engineering application,through the simulation data and result analysis of the core shaft die forging process,it can be used directly to guide the core forging process and batch production,the quality control of the core shaft forging has played an important role.At the same time,the technological exploration and knowledge accumulation of core shaft forging technology are also carried out,and the technical gap with foreign countries is shortened.At the same time,the research of this topic has accumulated experience and data for the production of die forging parts of similar structures in the future,which is of practical significance to reduce the cost of enterprises and improve market competitiveness.