薄壁齿圈装夹方式优化分析研究
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摘要
在插齿加工中,薄壁齿圈的装夹变形一直制约着齿轮加工精度,由于薄壁齿圈的刚度较小装夹时容易产生弹性变形,使得后续的加工精度难以保证.解决零件的加工精度不高的问题首先从专用工装夹具优化设计方面入手.第一,利用结构力学理论与有限元仿真模型两种方式分别对薄壁齿圈的装夹变形进行研究,通过分析得出薄壁齿圈的变形规律.第二,通过对薄壁齿圈变形规律的研究针对薄壁齿圈装夹变形问题提出新的夹具设计思路,依据力学原理对变形量大的轴向装夹采用压板装夹方式使得齿圈的装夹变形量减少.研究结果表明:使用优化后的装夹方式变形量比原有装夹方式减小81. 2%,对薄壁内齿圈的装夹变形问题提供了研究方法 .
The clamping deformation of the thin-walled ring gear has always restricted the gear machining accuracy in the gear shaping process. Because the rigidity of the thin-walled ring gear is small,the elastic deformation is easy to occur during the clamping,which makes the subsequent machining accuracy difficult to guarantee. Solving the problem of low machining accuracy of parts begins with the optimization design of special fixtures. Firstly,the structural deformation mechanics theory and the finite element simulation model were used to study the clamping deformation of the thin-walled ring gear,and the deformation law of the thin-walled ring gear was obtained through analysis. Secondly,a new fixture design idea was proposed for the deformation of the thin-walled ring gear through the research on the deformation law of the thin-walled ring gear. According to the mechanical principle,the axial clamping with large deformation amount was adopted by the clamping plate clamping method. The amount of clamping deformation was reduced. The research results show that the deformation of the optimized clamping method is 81. 2% lower than that of the original clamping method,providing a research method for the clamping deformation of the thin-walled internal ring gear.
The clamping deformation of the thin-walled ring gear has always restricted the gear machining accuracy in the gear shaping process. Because the rigidity of the thin-walled ring gear is small,the elastic deformation is easy to occur during the clamping,which makes the subsequent machining accuracy difficult to guarantee. Solving the problem of low machining accuracy of parts begins with the optimization design of special fixtures. Firstly,the structural deformation mechanics theory and the finite element simulation model were used to study the clamping deformation of the thin-walled ring gear,and the deformation law of the thin-walled ring gear was obtained through analysis. Secondly,a new fixture design idea was proposed for the deformation of the thin-walled ring gear through the research on the deformation law of the thin-walled ring gear. According to the mechanical principle,the axial clamping with large deformation amount was adopted by the clamping plate clamping method. The amount of clamping deformation was reduced. The research results show that the deformation of the optimized clamping method is 81. 2% lower than that of the original clamping method,providing a research method for the clamping deformation of the thin-walled internal ring gear.
引文
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[10]龚智鹏,苏宏华,何临江. 2124铝合金桁梁薄壁件铣削变形仿真优化[J].机械制造与自动化,2018,47(3):149-152.
[2]郭毓辉.大型薄壁套筒件立车装夹变形的控制[J].机械工程师,2012,(6):119-120.
[3]潘伟光,熊雪峰,吴粤军,等.薄壁管状零件加工工装优化技术[J].工具技术,2015,49(10):67-70.
[4]陈树峰,马伏波.薄壁工件在夹紧力作用下变形量的计算[J].煤矿机械,2005,(02):70-72.
[5]祁皑,林伟.结构力学(第二版)[M].北京:中国建筑出版社,2018.
[6]王世斌,亢一澜.材料力学[M].北京:高等教育出版社,2008.
[7]王欢.弱刚度环类零件装夹变形研究[D].北京:北京理工大学,2016.
[8]洪石磊.薄缘斜齿圆柱齿圈应力应变研究[J].煤矿机械,2016,37(3):36-38.
[9]陈华,陈蔚芳,郑会龙.薄壁件装夹方案优选的有限元模拟[J].组合机床与自动化加工技术,2008,(3):63-67.
[10]龚智鹏,苏宏华,何临江. 2124铝合金桁梁薄壁件铣削变形仿真优化[J].机械制造与自动化,2018,47(3):149-152.