闭式高速压力机组合机身的载荷谱分析

基于力学的基本理论对带有平衡机构的曲柄滑块机构进行运动学和动力学分析.通过近似简化曲轴的力学模型,获得了曲轴与上横梁轴承座之间相互作用的载荷谱理论公式.利用Matlab对空载和打桩2种工况下组合机身的载荷谱数据进行仿真,分析这2种工况下载荷谱曲线的规律.仿真结果表明,在空载情形下,曲轴和上横梁轴承座之间相互作用的理论与仿真载荷谱曲线呈现周期性的正弦波形式;在打桩工况下,曲轴和上横梁轴承座之间相互作用的理论和仿真载荷谱曲线呈现周期性的脉冲波形式.该结果能够为有限元法分析闭式高速压力机组合机身动力学性能过程中载荷的确定提供理论基础.

Load spectrum analysis for combined frame of closed high-speed press

Based on the basic theory of mechanics, kinematic and dynamic analysis for a slider-crank mechanism with a balance mechanism is performed. The theoretical formula of the load spectrum for the interaction between the crank shaft and the bearing seat of the upper beam is achieved by approximately simplifying the mechanical model of the crank shaft. The simulation for the load spectrum data of combined frame under the operating conditions of blanking or piling is performed using Matlab and the law of the load spectrum curves under these two conditions is analyzed. The simulation results show that under a no-load condition, the load spectrum curves of the interaction between the crank shaft and the bearing seat of the upper beam present a form of periodic sine wave and under the piling condition, the load spectrum curves of the interaction between the crank shaft and the bearing seat of the upper beam present a form of periodic pulse wave. The simulation results can provide a theoretical foundation for the load determination during the process of analyzing the dynamic characteristics on the combined frame of a closed high-speed press through the finite element method.