锻压技术

偏心齿轮对压力机的振动影响分析

英文标题：Analysis on influence of eccentric gear on press vibration

作者：牛瑞霞李士佩仲太生詹俊勇

关键词：偏心齿轮压力机振动等效刚度共振

分类号：TG315

出版年,卷(期):页码：2017,42(7):97-101

摘要：

机身振动是影响机床精度、寿命及所生产零件质量的关键因素，偏心齿轮对压力机振动的影响分析日益受到重视。根据某型号压力机的结构建立三维模型，运用有限元分析软件，按照压力机的实际工作情况进行静力分析，综合各部分的变形量，得到压力机的等效刚度。建立压力机空转状态下的振动模型，提出相应的计算方法，得到压力机振动的固有频率及振幅与偏心齿轮转动角速度的变化关系，从而可以避免压力机的共振现象。在理论计算的基础上进一步实践检验，分析数据，得到偏心齿轮在给定的转速下偏心距、偏心齿轮质量与振幅的变化关系，为压力机空转时的振动设计提供合理的优化方案。

Body vibration is the key factor affecting the precision, life and product quality of press. So the analysis on the influence of eccentric gears on the vibration of press has been paid more and more attention. The three-dimensional model was established based on the structure of a press，and the static analysis according to the actual working status of press was conducted by finite element analysis software. Then, the equivalent stiffness of press was obtained by integrating the deformation of each part, and a vibration model was set up under the condition of press idling. Furthermore, the corresponding calculation method was put forward, and the change relationships between the natural frequency and amplitude and the eccentric gear rotation angular velocity were obtained to avoid the resonance phenomenon of press. On the basis of theoretical calculation, further testing and data analysis, the change relationships among eccentricity，quality and amplitude of eccentric gear were obtained under the given speed to provide a reasonable optimization scheme for the vibration design of press idling.

基金项目：

江苏省科技支撑计划项目（SBA2016030429）

作者简介：牛瑞霞（1988-），女，硕士，工程师，E-mail：nrx886@126.com

参考文献：

[1]范宏才. 现代锻压机械[M]. 北京：机械工业出版社，1994.

Fan H C. Modern Forging Machinery[M]. Beijing：China Machine Press, 1994.

[2]张义民. 机械振动 [M].北京:清华大学出版社，2007.

Zhang Y M. Mechanical Vibration[M]. Beijing：Tsinghua University Press，2007.

[3]何德誉. 曲柄压力机[M]. 北京：机械工业出版社，1987.

He D Y. Crank Press[M]. Beijing：China Machine Press，1987.

[4]李士佩，张庆明，张锦义，等. 组合机身闭式压力机冲压成形时的振动分析[J]. 锻压技术，2014，39（7）：92-95.

Li S P，Zhang Q M，Zhang J Y，et al. Vibration analysis of straight press with combined frame during stamping[J]. Forging & Stamping Technology，2014，39（7）：92-95.

[5]孙友松，周庆刚，黎勉，等. 大型热模锻压力机机身横向振动与变形的动态测试[J]. 锻压技术，2015，40（12）：71-76.

Sun Y S，Zhou Q G，Li M，et al. Dynamic measure of horizontal oscillations and deformations for a large-tonnage hot-forging press[J]. Forging & Stamping Technology，2015，40（12）：71-76.

[6]古滨，蹇开林.智能结构振动主动控制的刚性有限元法[J]. 机床与液压，2013，41（18）：83-87.

Gu B，Jian K L. Active vibration control of intelligent structure using rigid finite element method[J]. Machine Tool & Hydraulics，2013，41(18)：83-87.

[7]Mojtaba Azadi, Saeed Behzadipour, Garry Faulkner. Antagonistic variable stiffness elements[J]. Mechanism and Machine Theory，2009，44(9)：1746-1758.

[8]Zeng S S, Wan X J, Li W L, et al. A novel approach to fixture design on suppressing machining vibration of flexible workpiece[J]. International Journal of Machine Tools and Manufacture, 2012, 58(7)：29-43.

[9] Otsu M, Yamagata C, Osakada K. Reduction of blanking noise by controlling press motion[J]. CIRP Annals-Manufacturing Technology，2003，52(1)：245-248.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】