论文部分内容阅读
目前我国生产的中小型机械压力机除可以满足国内生产发展的需要外并有一定数量出口。但从五十年代初至今国内生产的中小型机械压力机在结构上没有大的变化。机身的造型、构造及其刚度,特别是机床工作时的接触刚度较差至今没有改善;离合器—制动器系统,公称压力在100吨以下的机床,多数仍用转键或拨销式刚性离合器,空运转噪声在90分贝以上,不能实现滑块的寸动行程和瞬时(紧急)制动;滑块导向精度低以及行程固定不可调,影响模具寿命和冲压件尺寸精度;滑块行
At present, China’s small and medium-sized mechanical presses in addition to meet the needs of domestic production and development and a certain amount of exports. But from the early 1950s to the present domestic production of small and medium-sized mechanical presses in the structure of no major changes. The shape, structure and stiffness of the fuselage, especially the poor contact stiffness of the machine tool has not improved so far; clutch - brake system, nominal pressure below 100 tons of machine tools, the majority are still using the key switch or pull-type rigid clutch, Air running noise of 90 dB or more, the slider can not move inching and instantaneous (emergency) brake; slider low precision and fixed travel can not be adjusted, affecting the mold life and stamping dimensional accuracy; slider line