胶印机的结构优化

Optimization on offset printing press structure

为提高胶印机在高速工况下的印刷质量,建立某型胶印机结构动力学模型,通过仿真准确识别及分析其振动模态和动态特性,发现墙板结构不合理是诱发整机在激振力作用下产生较大振动的重要原因;以机架前4阶固有频率加权值作为评价机架动态性能的标准,利用灵敏度分析方法分析墙板筋板参数对其动态性能的影响,并进行结构优化设计.优化结果表明机架第1阶固有频率提高18.1%.该方法可以提高胶印机的动态性能,增强其产品竞争力.

To improve the printing quality of offset printing press when it is working at high speed, a dynamics model is built for a kind of offset printing press, and the vibration mode and dynamic characteristics are recognized and analyzed accurately by simulation. It shows that the unreasonable structure of the wallboard is the main reason that results in bigger vibration of whole machine under the effect of exciting force; taken the weight values of the first four natural frequency as the standards to evaluate the dynamic performance of the frame, the effect of the strengthened bar parameters of wallboard on the dynamic performance is analyzed by sensitivity analysis method, and the structure design is optimized. The optimization result shows that one order natural frequency of the frame is increased by 18.1%. The method can improve the dynamic performance and enhance the competition for the offset printing press.