Simulation study on the influence of engine crankshaft bearing shell assembly process on assembly accuracy
In order to study the influence of the assembly process of the engine crankshaft bearing on the assembly accuracy,the deformation law and equivalent stress of the bearing under the torque of the fastening bolts are ana-lyzed,and seven assembly process schemes are formulated.The finite element simulation is used to verify each scheme,and the stress distribution and deformation law of the bearing under different fastening order are ob-tained.The assembly precision is evaluated by the circularity error of the bearing.The research results show that the optimized scheme reduces the circularity error of the bearing to 0.003 8 mm,ensuring the assembly preci-sion.By analyzing the experimental results,the average value of the inner diameter hole deviation of the bearing is 0.030 0 mm,which is 7%lower than the average value of 0.032 4 mm obtained by the finite element simula-tion,indicats that the experimental and simulation results are basically consistent.
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