后桥主减速器壳体轴承座的裂解加工数值分析
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摘要
利用ABAQUS模拟后桥主减速器壳体轴承座的启裂并进行数值分析.壳体轴承座材料选用基体组织中珠光体体积分数50%的QT450,通过J积分确定了启裂点位置,计算出裂解载荷;分析了启裂时裂尖区域的塑性变形及其对轴承孔失圆量的影响,并进行了实验研究.结果表明,壳体轴承座的启裂点位于靠近裂尖中部位置;塑性区域位于裂尖根部呈蝶形分布,造成的轴承孔失圆度较小;裂解加工质量合格,说明轴承座适合使用裂解技术.研究结果为改进壳体轴承座的生产工艺流程奠定了坚实的理论基础,为壳体轴承座裂解材料的选择、裂解设备的设计、工艺过程的制定提供了参考.
The initial fracture splitting process of rear axles' main reducer shell bearing seats was simulated by ABAQUS and a numerical analysis was carried out. The material of the shell bearing seats is QT450 with 50% pearlite in the matrix structure. The position of the starting cracking point was determined by J integral,and the splitting force was then calculated. The plastic deformation of the crack tip region when cracking and its effect on the loss of circle were analyzed,and an experimental study was conducted. The results showthat the starting cracking point of the bearing is located near the middle of the crack tip. The plastic area located at the root of the crack tip is of butterfly-shaped distribution,resulting in the small loss of circle of bearing holes. The processing quality of fracture splitting is qualified,which is suitable for the application of fracture splitting technology. The research result lays a solid theoretical foundation for improving the production process of shell bearing seats,and provides a reference for the selection of splitting materials of shell bearing seats,the design of splitting equipment and the formulation of processing procedures.
The initial fracture splitting process of rear axles' main reducer shell bearing seats was simulated by ABAQUS and a numerical analysis was carried out. The material of the shell bearing seats is QT450 with 50% pearlite in the matrix structure. The position of the starting cracking point was determined by J integral,and the splitting force was then calculated. The plastic deformation of the crack tip region when cracking and its effect on the loss of circle were analyzed,and an experimental study was conducted. The results showthat the starting cracking point of the bearing is located near the middle of the crack tip. The plastic area located at the root of the crack tip is of butterfly-shaped distribution,resulting in the small loss of circle of bearing holes. The processing quality of fracture splitting is qualified,which is suitable for the application of fracture splitting technology. The research result lays a solid theoretical foundation for improving the production process of shell bearing seats,and provides a reference for the selection of splitting materials of shell bearing seats,the design of splitting equipment and the formulation of processing procedures.
引文
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[5]齐凯,王之新,李廷举,等.低牌号球墨铸铁风冷强化工艺的试验研究[J].金属热处理,2008,33(3):76-78.(Qi Kai,Wang Zhi-xin,Li Ting-ju,et al.Study on wind cooling strengthening process of nodular cast iron[J].Heat Treatment of Metals,2008,33(3):76-78.)
[6]何东野,杨慎华,寇淑清.发动机曲轴箱轴承座裂解加工数值分析[J].吉林大学学报(工学版),2009,39(1):78-82.(He Dong-ye,Yang Shen-hua,Kou Shu-qing.Numerical analysis on fracture splitting technology of main bearing block of engine[J].Journal of Jilin University(Engineering and Technology Edition),2009,39(1):78-82.)
[7]Goran V.J-integral as possible criterion in material fracture toughness assessment[J].Engineering Review,2011,31(2):91-96.
[8]Folch L C A,Burdekin F M.Application of coupled brittle ductile model to study correlation betw een Charpy energy and fracture toughness values[J].Engineering Fracture Mechanics,1999,63(1):57-80.
[9]Hoffmann G,Geiman T,Marra M,et al.Fracture splitting of pow der forged connecting rods[J].Transactions Journal of Materials&Manufacturing,2002,111(5):1-11.
[10]Boo K S,Cho H S.Transient temperature distribution in arc w elding of finite thickness plates[J].Proceedings of the Institution of Mechanical Engineers,Part B:Journal of Engineering Manufacture,1990,204(3):175-183.
[2]Zhang X Z,Cai Q Z,Zhou G F,et al.Development on microalloyed high carbon steel used for fracture splitting connecting rods[C]//Advanced M aterials Research.StafaZurich:Trans Tech Publications,2011:301-308.
[3]He B,Sun J,Chen S,et al.Crack analysis on the toothed mating surfaces of a diesel engine connecting rod[J].Engineer Failure Analysis,2013,34(12):443-450.
[4]廉相如,王国权,陈勇.主减速器轴承载荷对重载卡车驱动桥壳疲劳特性影响[J].机械工程师,2016,29(2):48-51.(Lian Xiang-ru,Wang Guo-quan,Chen Yong.Influence analysis of driving axle bearing loading on differential housing fatigue performance[J].Mechanical Engineer,2016,29(2):48-51.)
[5]齐凯,王之新,李廷举,等.低牌号球墨铸铁风冷强化工艺的试验研究[J].金属热处理,2008,33(3):76-78.(Qi Kai,Wang Zhi-xin,Li Ting-ju,et al.Study on wind cooling strengthening process of nodular cast iron[J].Heat Treatment of Metals,2008,33(3):76-78.)
[6]何东野,杨慎华,寇淑清.发动机曲轴箱轴承座裂解加工数值分析[J].吉林大学学报(工学版),2009,39(1):78-82.(He Dong-ye,Yang Shen-hua,Kou Shu-qing.Numerical analysis on fracture splitting technology of main bearing block of engine[J].Journal of Jilin University(Engineering and Technology Edition),2009,39(1):78-82.)
[7]Goran V.J-integral as possible criterion in material fracture toughness assessment[J].Engineering Review,2011,31(2):91-96.
[8]Folch L C A,Burdekin F M.Application of coupled brittle ductile model to study correlation betw een Charpy energy and fracture toughness values[J].Engineering Fracture Mechanics,1999,63(1):57-80.
[9]Hoffmann G,Geiman T,Marra M,et al.Fracture splitting of pow der forged connecting rods[J].Transactions Journal of Materials&Manufacturing,2002,111(5):1-11.
[10]Boo K S,Cho H S.Transient temperature distribution in arc w elding of finite thickness plates[J].Proceedings of the Institution of Mechanical Engineers,Part B:Journal of Engineering Manufacture,1990,204(3):175-183.