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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。
The vibration of the fuselage is a key factor that affects the accuracy and life of the machine tool and the quality of the parts produced. The analysis of the influence of the eccentric gear on the vibration of the press is paid more and more attention. According to the structure of a certain type of press, a three-dimensional model is set up. The finite element analysis software is used to carry out the static analysis according to the actual working conditions of the press. The equivalent stiffness of the press is obtained by synthesizing the deformation of each part. The vibration model under the idle state of the press is established and the corresponding calculation method is proposed. The relationship between the natural frequency of the vibration and the angular velocity of the eccentric gear is obtained, which can avoid the resonance of the press. On the basis of theoretical calculation, the paper further tests and analyzes the data to get the relationship between eccentric gear eccentricity and mass and amplitude of eccentric gear at a given rotational speed, which provides a reasonable optimization scheme for the design of vibration when the compressor idles.