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在大型摩擦压力机、丝杠压力机等压力机械设备中,丝杠、螺母机构传递着很大的动力,并承受不规则的交变载荷,即在应力循环中,最大与最小应力随时间发生不规则变化。因而这些丝杠螺母构件的疲劳强度和随机载荷下的疲劳寿命,都是很不理想的。再者一般的丝杠、螺母机构中存在很大的摩擦阻力,会减少功率的输出。在这种状态下,常会出现意想不到的结果,严重影响生产的正常进行和劳动生产率的提高。针对上述情况,有必要对这种状态下工作的构件进行正确的分析,设计出合理的结构。本文就压力加
In large friction presses, screw presses and other pressure machinery and equipment, screw, nut mechanism transmits a lot of power, and to bear the irregular alternating load, that is, in the stress cycle, the maximum and minimum stress with time Irregular changes. Therefore, the fatigue strength of these screw nut members and the fatigue life under random load are very poor. Furthermore, the general screw, nut mechanism there is a great frictional resistance, will reduce the power output. In this state, unexpected results often occur, seriously affecting the normal production and labor productivity. In view of the above situation, it is necessary to correctly analyze the components that work in this state and design a reasonable structure. This article on the pressure increase