基于冷滚压工艺的谐波减速器柔轮疲劳寿命分析
|
摘要
依据冷滚压工艺产生的初始残余压应力对裂纹萌生,裂纹扩展的抑制机理,以冷滚压谐波减速器柔轮为研究对象,采用SWT方法和断裂力学理论对冷滚压柔轮分别进行裂纹萌生寿命、裂纹扩展寿命理论分析,并运用疲劳分析软件nCode Design-Life仿真分析进行相互验证。结果表明,冷滚压柔轮疲劳寿命在各阶段均优于机加工柔轮,能够有效延长谐波减速器使用寿命,验证了柔轮冷滚压工艺的优越性,并对延长柔轮的使用寿命提供了参考价值。
According to the inhibitory effect of initial residual stress produced by cold rolling process on crack initiation and crack propagation,taking the cold rolling flexspline of harmonic reducer as the research object,the SWT method and fracture mechanics theory are used to carry out theoretical analysis of crack initiation life and crack propagation life of cold rolling flexspline respectively,and the verification of each other is carried out by using the simulation analysis of the fatigue analysis software nCode Design-Life. The results show that the fatigue life of cold rolling flexspline are better than the machining flexspline in various stages,and the working life of the harmonic reducer is prolonged. The research results verify the advantages of cold rolling process of flexspline,and have important reference value for improving the performance of flexspline.
According to the inhibitory effect of initial residual stress produced by cold rolling process on crack initiation and crack propagation,taking the cold rolling flexspline of harmonic reducer as the research object,the SWT method and fracture mechanics theory are used to carry out theoretical analysis of crack initiation life and crack propagation life of cold rolling flexspline respectively,and the verification of each other is carried out by using the simulation analysis of the fatigue analysis software nCode Design-Life. The results show that the fatigue life of cold rolling flexspline are better than the machining flexspline in various stages,and the working life of the harmonic reducer is prolonged. The research results verify the advantages of cold rolling process of flexspline,and have important reference value for improving the performance of flexspline.
引文
[1]丁建生,翟开华,刘蔺勋.切削加工对45钢表面组织特性的影响[J].热加工工艺,2011,40(18):54-56.
[2]王生武,温爱玲,邴世君,等.滚压强化的残余应力的数值仿真及工艺分析[J].计算力学报,2008,25(s1):113-118.
[3]林树忠,路懿,李宇鹏,等.谐波齿轮冷轧成形分析[J].钢铁,1996(12):31-34.
[4]朱小星,王宝雨,杨乐毅,等.齿廓间相对滑动对滚轧齿轮齿廓金属流动的影响[J].北京科技大学学报,2014,36(2):246-249.
[5] NEUGEBAUER R,PUTZ M,HELLFRITZSCH U. Improved process design and quality for gear manufacturing with flat and round rolling[J]. CIRP Annals-Manufacturing Technology,2007,56(1):307-312.
[6] YANG X,LIN S. Factors affecting cold-rolling accuracy of harmonic gears[C]∥International Conference on Mechanic Automation and Control Engineering, June 26-28,2010, Wuhan, China. New York:IEEE,2010:3891-3894.
[7] LIN S,YANG X,SUN H,et al. Principle of cold rolling harmonic gear and research on the equipment[C]∥International Technology and Innovation Conference,November 6-7,2006,Hanzhou,China.New York:IEEE,2006:1286-1289.
[8] LI J,WANG G,WU T. Numerical-experimental investigation on the rabbit ear formation mechanism in gear rolling[J]. International Journal of Advanced Manufacturing Technology,2017,91:3551-3559.
[9] WANG G,LI J,WU T. Numerical simulation and experimental investigation on the gear rolling process[J]. Procedia Engineering,2017,207:609-614.
[10]吴上生,喻钟鸣.谐波减速器柔轮冷滚工艺及残余应力数值模拟[J].华南理工大学学报(自然科学版),2017(2):52-58.
[11]姜,王亚珍,赵坤,等.谐波减速器柔性薄壁轴承的力学特性分析[J].轴承,2017(1):10-14.
[12]王华坤,范元勋,宋德锋.预压柔性滚子轴承柔性滚子变形的计算[J].轴承,2000(11):1-3.
[13]沈允文,叶庆泰.谐波齿轮传动的理论和设计[M].北京:机械工业出版社,1985:206-210.
[14]马南飞.双圆弧谐波齿轮传动侧隙分析及齿间载荷分布研究[D].重庆:重庆大学,2014:44-47.
[15]喻钟鸣.谐波减速器柔轮冷滚压成形关键技术研究[D].广州:华南理工大学,2017:66-67.
[16]周文.微动疲劳裂纹萌生特性及寿命预测[D].杭州:浙江工业大学,2007:5-8.
[17]傅祥炯.结构疲劳与断裂[M].西安:西北工业大学出版社,1995:209-212.
[18]俞必强,李威,薛建华,等.基于动载荷谱的齿轮弯曲疲劳寿命预测[J].北京科技大学学报,2013,35(6):813-817.
[19]中国机械工业联合会.机器人用谐波齿轮减速器:GB/T 30819-2014[S].北京:中国标准出版社,2014:19-20.
[2]王生武,温爱玲,邴世君,等.滚压强化的残余应力的数值仿真及工艺分析[J].计算力学报,2008,25(s1):113-118.
[3]林树忠,路懿,李宇鹏,等.谐波齿轮冷轧成形分析[J].钢铁,1996(12):31-34.
[4]朱小星,王宝雨,杨乐毅,等.齿廓间相对滑动对滚轧齿轮齿廓金属流动的影响[J].北京科技大学学报,2014,36(2):246-249.
[5] NEUGEBAUER R,PUTZ M,HELLFRITZSCH U. Improved process design and quality for gear manufacturing with flat and round rolling[J]. CIRP Annals-Manufacturing Technology,2007,56(1):307-312.
[6] YANG X,LIN S. Factors affecting cold-rolling accuracy of harmonic gears[C]∥International Conference on Mechanic Automation and Control Engineering, June 26-28,2010, Wuhan, China. New York:IEEE,2010:3891-3894.
[7] LIN S,YANG X,SUN H,et al. Principle of cold rolling harmonic gear and research on the equipment[C]∥International Technology and Innovation Conference,November 6-7,2006,Hanzhou,China.New York:IEEE,2006:1286-1289.
[8] LI J,WANG G,WU T. Numerical-experimental investigation on the rabbit ear formation mechanism in gear rolling[J]. International Journal of Advanced Manufacturing Technology,2017,91:3551-3559.
[9] WANG G,LI J,WU T. Numerical simulation and experimental investigation on the gear rolling process[J]. Procedia Engineering,2017,207:609-614.
[10]吴上生,喻钟鸣.谐波减速器柔轮冷滚工艺及残余应力数值模拟[J].华南理工大学学报(自然科学版),2017(2):52-58.
[11]姜,王亚珍,赵坤,等.谐波减速器柔性薄壁轴承的力学特性分析[J].轴承,2017(1):10-14.
[12]王华坤,范元勋,宋德锋.预压柔性滚子轴承柔性滚子变形的计算[J].轴承,2000(11):1-3.
[13]沈允文,叶庆泰.谐波齿轮传动的理论和设计[M].北京:机械工业出版社,1985:206-210.
[14]马南飞.双圆弧谐波齿轮传动侧隙分析及齿间载荷分布研究[D].重庆:重庆大学,2014:44-47.
[15]喻钟鸣.谐波减速器柔轮冷滚压成形关键技术研究[D].广州:华南理工大学,2017:66-67.
[16]周文.微动疲劳裂纹萌生特性及寿命预测[D].杭州:浙江工业大学,2007:5-8.
[17]傅祥炯.结构疲劳与断裂[M].西安:西北工业大学出版社,1995:209-212.
[18]俞必强,李威,薛建华,等.基于动载荷谱的齿轮弯曲疲劳寿命预测[J].北京科技大学学报,2013,35(6):813-817.
[19]中国机械工业联合会.机器人用谐波齿轮减速器:GB/T 30819-2014[S].北京:中国标准出版社,2014:19-20.