The Research On Fracture Splitting Equipment Of Main Reducer Bearing Block Of Medium And Heavy Duty Vehicle

The medium and heavy vehicle speed reducer is the core component of the automobile engine power transmission and transformation,and its internal is the precise meshing operation of the gear.The main reducer shell bearing as the support shaft positioning axle gear system and,it should not only bear the axial load transmission shaft of rear axle vibration,but also bear radial load,gear transmission from the production so that the traditional processing methods of bearing body and cover will be at the junction of different degrees the wrong move,which not only affects the life of the reducer,also bring security risks to a certain extent.Cracking machining technology as a new machining process,machining processes with high production efficiency,less equipment,less investment,low manufacturing cost,good product quality,high assembly precision,strong bearing has the advantages of traditional processing technology can not match the new processing technology of a very competitive and development potential of the technology.First used in engine connecting rod production,has become an important symbol to measure a country connecting rod manufacturing industry development level.The Research Institute of roll forging technology of Jilin University has successfully developed the engine connecting rod cracking equipment,and expanded the cracking processing technology,and applied it to the development of cracking processing equipment for the main bearing housing of the main reducer.This paper is the main reducer cracking performance of shell material on the use of computer technology,the applied load and constraints from the design,modeling,to reflect the actual conditions of the prediction in a series of steps,and to evaluate the performance of the product,and then optimize the product structure.The product design and analysis software,software and software interface,in this paper,using the software according to the design size,the computer constructed electronic machine?virtual prototype cracking?,and analyzed the corresponding simulation,ready for the final production equipment.The main work and achievements of this paper are as follows:1.The mechanical parameters of the material are obtained by tensile test,and the simplified simulation model is determined.The cracking load 574 KN of the bearing pedestal is determined by simulation analysis.According to the simplified model,the corresponding specimens were prepared,and the cracking test was carried out.The breaking force was 600 KN.The simulation results were compared with the test results,and the pyrolysis properties of the bearing base materials were analyzed.2.According to the principle of cracking processing,the cracking mechanism of the machine tool is selected,its overall layout is determined,and the reasonable design scheme is given.Finally,the cracking processing flow of the equipment is determined.3.The use of machine tool parts 3D modeling,virtual assembly and the 3D model of machine tool,the kinematics simulation of the model,and interference analysis,the unreasonable design of the regional optimization.To add constraints?movement,force and force?to the 3D model,the interface software Sim Designer is used to import the ADAMS to simulate the dynamics,and the simulation results are analyzed.4.To design the parameters of pyrolysis of hydraulic cylinder,oil pump type?63YCY14-1B?and determine the?N=30KW?of the motor power,and a preliminary calculation?T=A·P=72.53t?62.8t?,the calculation includes: Calculation of cracking force of hydraulic cylinder and hydraulic cylinder diameter check?D=200mm?,the diameter of the piston rod?d=120mm?72.9mm?and the cylinder wall thickness check(?_min=17mm?13.2mm).