某汽车旋锻轴毛坯尺寸要求研究
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摘要
以某汽车等速万向传动中间旋锻轴为对象,提出耦合旋锻成形工艺特性以及材料加工硬化特性、毛坯力学特性、毛坯旋锻前后的壁厚和内外径之间的关系进行毛坯尺寸要求设计。首先根据芯棒与坯料之间的最大间隙要求,保证旋锻成形质量,确定毛坯的最大内径要求;其次根据旋锻成形工艺、材料加工硬化特性以及旋锻后无芯棒两端渐开线花键成形工艺要求确定毛坯最大硬度;最后根据毛坯力学特性试验获得的硬度强度转换关系、材料拉伸试验拟合得到的加工硬化特性曲线、毛坯旋锻前后的壁厚和内外径之间的关系以及毛坯最大内径要求确定毛坯最大外径要求。
Taking the middle rotary-swaging shafts of constant velocity and universal drive in an automobile as the case,the size requirements of rotary-swaging shafts workblank were designed considering the swaging forming process,the work hardening characteristics of the material,the mechanical properties of the workblank and the relationship between wall thickness and inner and outer diameters before and after rotary-swaging.First of all,in order to guarantee the quality of the shafts,the maximum inner diameter requirement of the workblank was determined according to the maximum clearance between the mandrel bar and the workblank.Secondly,the maximum hardness of the workblank was determined according to the rotary-swaging forming process,the work hardening characteristics of the material and the involute spline forming process by rotary-swaging without mandrel at both ends of the shafts.Finally,combining the hardness-strength conversion relationship obtained by the mechanical property test of the workblank,the work hardening characteristic curve obtained by the material tensile testing,the relationship between wall thickness and inner and outer diameters before and after rotary-swaging and the maximum inner diameter requirement of the workblank,the maximum outer diameter requirement of the workblank was determined.
Taking the middle rotary-swaging shafts of constant velocity and universal drive in an automobile as the case,the size requirements of rotary-swaging shafts workblank were designed considering the swaging forming process,the work hardening characteristics of the material,the mechanical properties of the workblank and the relationship between wall thickness and inner and outer diameters before and after rotary-swaging.First of all,in order to guarantee the quality of the shafts,the maximum inner diameter requirement of the workblank was determined according to the maximum clearance between the mandrel bar and the workblank.Secondly,the maximum hardness of the workblank was determined according to the rotary-swaging forming process,the work hardening characteristics of the material and the involute spline forming process by rotary-swaging without mandrel at both ends of the shafts.Finally,combining the hardness-strength conversion relationship obtained by the mechanical property test of the workblank,the work hardening characteristic curve obtained by the material tensile testing,the relationship between wall thickness and inner and outer diameters before and after rotary-swaging and the maximum inner diameter requirement of the workblank,the maximum outer diameter requirement of the workblank was determined.
引文
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[8]龚政,卢曦.某汽车旋锻轴加工硬化特性实验研究[J].机械设计与制造,2016,(2):177-180.GONG Zheng,LU Xi.Experiment study on work-hardening characteristics of rotary swaging driveshaft[J].Machinery Design&Manufacture,2016,(2):177-180.
[9]卢曦,廖金雄.毛坯力学特性对旋锻轴强度和寿命影响的试验研究[J].塑性工程学报,2016,23(3):17-22.LU Xi,LIAO Jinxiong.Effect of mechanical properties on strength and life of monobloc tube shaft[J].Journal of Plasticity Engineering,2016,23(3):17-22.
[10]秦文瑜,卢曦.无芯棒式旋锻工艺参数对传动轴表面质量的影响[J].塑性工程学报,2014,21(6):14-19.QIN Wenyu,LU Xi.Surface quality of monobloc tube shaft under different process parameters in rotary swaging without mandrel[J].Journal of Plasticity Engineering,2014,21(6):14-19.
[11]中国机械工程学会.锻压手册(第1卷)[M].北京:机械工业出版社,2007.
[12]卢曦.机械零件可回收性技术评价理论与应用[M].北京:科学出版社,2017.
[2]LI R,NIE Z R,ZUO T Y.FEA modeling of effect of axial feeding velocity on strain field of rotary swaging process of pure magnesium[J].Transactions of Nonferrous Metals Society of China,2006,16(5):1015-1020.
[3]SANJARI M,TAHERI A K,MOVAHEDI M R.An optimization method for radial forging process using ANN and Taguchi method[J].International Journal of Advanced Manufacturing Technology,2009,40(7-8):776-784.
[4]TAHERIZADEH A,NAJAFIZADEH A,SHATERI R,et al.Comparison of mechanical and metallurgical properties of hollow and solid forged products[J].Journal of Materials Processing Technology,2006,178(s1-s3):181-187.
[5]LIM S,NA K,CHOI H,et al.Development of automotive tubular driveshaft using the rotary swaging process[J].Proceedings of the Institution of Mechanical Engineers,2007,221(9):1401-1405.
[6]肖永茂,张华,江志刚.高效节能毛坯尺寸优化研究[J].组合机床与自动化加工技术,2016,(3):135-137.XIAO Yongmao,ZHANG Hua,JIANG Zhigang.High efficiency and energy sawing blank dimension optimization research[J].Modular Machine Tool&Automatic Manufacturing Technique,2016,(3):135-137.
[7]郭良刚,杨合,金坚诚.环件径轴向轧制毛坯尺寸设计方法[J].机械工程学报,2010,46(24):1-9.GUO Lianggang,YANG He,JIN Jiancheng.Design method of blank sizes for radial-axial ring rolling[J].Journal of Mechanical Engineering,2010,46(24):1-9.
[8]龚政,卢曦.某汽车旋锻轴加工硬化特性实验研究[J].机械设计与制造,2016,(2):177-180.GONG Zheng,LU Xi.Experiment study on work-hardening characteristics of rotary swaging driveshaft[J].Machinery Design&Manufacture,2016,(2):177-180.
[9]卢曦,廖金雄.毛坯力学特性对旋锻轴强度和寿命影响的试验研究[J].塑性工程学报,2016,23(3):17-22.LU Xi,LIAO Jinxiong.Effect of mechanical properties on strength and life of monobloc tube shaft[J].Journal of Plasticity Engineering,2016,23(3):17-22.
[10]秦文瑜,卢曦.无芯棒式旋锻工艺参数对传动轴表面质量的影响[J].塑性工程学报,2014,21(6):14-19.QIN Wenyu,LU Xi.Surface quality of monobloc tube shaft under different process parameters in rotary swaging without mandrel[J].Journal of Plasticity Engineering,2014,21(6):14-19.
[11]中国机械工程学会.锻压手册(第1卷)[M].北京:机械工业出版社,2007.
[12]卢曦.机械零件可回收性技术评价理论与应用[M].北京:科学出版社,2017.