基于虚拟正交试验的关节轴承工艺参数优化设计

Optimal design of technological parameters for spherical plain bearings based on virtual orthogonal experiment

以GEW12DEM1T关节轴承为研究对象,基于ABAQUS平台建立关节轴承挤压装配过程的有限元仿真模型。基于模拟仿真的虚拟正交试验选取模具半径R1,R2,收口半径Ra,定径带长度h,挤压速度v等重要成形参数,以内外圈最大接触压力Fmax、挤压力峰值Lmax、内外圈最大间隙与最小间隙之差Mmax、轴承端部金属流速均方差SDV为衡量指标。结果表明,影响Fmax,Lmax,Mmax,SDV的因素主次顺序分别为Ra>h>R1>R2>v,Ra>h>v>R1>R2,Ra>h>v>R1>R2,v>R2>h>Ra>R1;综合考虑轴承质量、挤压力等因素,获得了GEW12DEM1T自润滑关节轴承成形参数的合理取值范围R2=17mm^30mm,R1=4.5mm^5mm,h=6mm^6.3mm,v=20mm/s^40mm/s,Ra=13.9mm^14.2mm。实验验证结果表明,模拟及正交试验优化结果准确有效。

An applicable and reliable FE model for the extrusion assembly process for GEW12DEM1T spherical plain bearings was developed under the ABAQUS software environment .And the effects of forming parameters ,viz .,die radius R1 、 R2 ,conver‐gent radius Ra , sizing belt length h ,ram speed v , on the peak contact pressure of billet Fmax ,the peak extrusion load of billet Lmax ,the peak difference between the maximum clearance and minimum clearance Mmax and the uniformity of flow rate at die ex‐port SDV were investigated using virtual orthogonal experiment based on the developed FE model .The results show that the or‐der of the forming parameters＇ significance on Fmax , Lmax , Mmax and SDV are Ra 〉 h〉 R1 〉 R2 〉 v , Ra〉 h〉 v〉 R1 〉 R2 , Ra〉 h〉 v〉 R1 〉 R2 and v〉 R2 〉 h〉Ra〉R1 ,respectively .Comprehensively considering the quality of the spherical plain bearings and the extrusion load ,we pointed out that the reasonable ranges of the forming parameters are as follows：R2 =17mm－30mm , R1 =4.5mm－5mm ,h=6mm－6.3mm ,v=20mm/s－40mm/s ,Ra=13.9mm－14.2mm .The verifying experiment shows that the results of the numerical simulation and the virtual orthogonal experiments were accurate and effectual .