1.中南大学 高性能复杂制造国家重点实验室, 湖南 长沙 410083
2.中国航发中传机械有限公司, 湖南 长沙 410200
汤亚林(1979— ),男,湖南益阳人,本科,工程师,研究方向为齿轮加工。
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汤亚林,赵久越,唐进元.喷丸工艺参数与齿轮表面粗糙度关联规律数值计算研究[J].机械传动,2020,44(05):18-22.
Tang Yalin,Zhao Jiuyue,Tang Jinyuan.Numerical Calculation Study on the Correlation Law Between Shot Peening Process Parameter and Gear Surface Roughness[J].Journal of Mechanical Transmission,2020,44(05):18-22.
汤亚林,赵久越,唐进元.喷丸工艺参数与齿轮表面粗糙度关联规律数值计算研究[J].机械传动,2020,44(05):18-22. DOI: 10.16578/j.issn.1004.2539.2020.05.003.
Tang Yalin,Zhao Jiuyue,Tang Jinyuan.Numerical Calculation Study on the Correlation Law Between Shot Peening Process Parameter and Gear Surface Roughness[J].Journal of Mechanical Transmission,2020,44(05):18-22. DOI: 10.16578/j.issn.1004.2539.2020.05.003.
喷丸强化除了会对齿轮表面的残余应力场产生影响外,还会改变齿轮表面粗糙度。齿轮齿根处与分度圆处的表面粗糙度会强烈影响其服役性能,因此,研究喷丸过程中齿轮表面粗糙度的演变过程十分必要。为此,建立随机丸粒有限元模型来模拟齿根处与分度圆附近区域的喷丸强化过程,提取冲击区域所有的离散数据用以计算表面粗糙度参数;数值模拟得到的结果与齿轮喷丸后的测试结果基本吻合;并研究了喷丸时间、弹丸大小、冲击速度对齿根处与分度圆附近表面粗糙度参数的影响,从而可以合理地选择喷丸工艺参数,以达到控制齿轮喷丸后表面粗糙度的目的。研究结果表明,在同样的喷丸工艺参数下,分度圆处表面粗糙度,R,a,值与,R,z,值明显小于齿根处;随着冲击速度及弹丸直径的增加,齿根处表面粗糙度,R,a,值,、R,z,值明显增加且弹丸直径对粗糙度参数的影响大于冲击速度;随着冲击速度及弹丸直径的增加,分度圆表面粗糙度,R,a,值,、R,z,值明显增加,,R,mr,(-1),值减小,且弹丸直径对粗糙度参数的影响大于冲击速度。
In addition to affecting the residual stress field on the gear surface, shot peening also changes the surface roughness of the gear. The surface roughness at the tooth root and the pitch circle will strongly affect its service performance. Therefore, it is necessary to study the evolution process of the gear surface roughness during the shot peening process. In this study, a random shot finite element model is established to simulate the shot peening process in the vicinity of the root and the pitch circle, and all discrete data in the impact region are extracted to calculate the surface roughness parameters. The results obtained by numerical simulation are basically consistent with the test results after gear shot peening. Subsequently, the effects of shot peening time, shot size and impact velocity on the surface roughness parameters near the root and the pitch circle are studied. The blasting process parameters can be reasonably selected to achieve the purpose of controlling the surface roughness of the gear after shot peening. The research shows that, under the same shot peening parameters, the surface roughness ,R,a, and ,R,z, values of the pitch circle are significantly smaller than the root. The surface roughness increases at the root with the increase of the impact velocity and the diameter of the shot, the ,R,a, and ,R,z, increase obviously and the impact of the shot diameter on the roughness parameter is greater than the impact velocity. With the increase of the impact velocity and the diameter of the shot, the surface roughness ,R,a, and ,R,z,of the indexing circle increase significantly, and the ,R,mr,(-1), value decreases. And the effect of the diameter of the shot on the roughness parameter is greater than the impact velocity.
喷丸强化齿轮表面粗糙度数值方法
Shot peeningGearSurface roughnessNumerical method
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