液气式高速棒料剪切机的原理及动态分析

Principle and dynamic analysis of hydraulic and pneumatic high-speed bar shear

根据液气式高速棒料剪切机的设计思想,论述了其工作原理和结构特点.通过分析液气式高速棒料剪切机的运动过程,将其分为加速、加压和缓冲三个阶段,通过位移函数得到运动过程中各阶段的力函数.利用动力学仿真软件ADAMS对液气式高速棒料剪切机进行动态分析与仿真.结果表明:加速阶段可以提供足够的动力保证活塞的启动,并使活塞在较短时间内速度达到6 m/s;加压阶段加压蓄能器提供的动力不足,应加大蓄能器的结构设计;缓冲阶段的活塞运行合理,实现了顺利缓冲.

Based on the design idea of hydraulic and pneumatic high-speed bar shear, its operational principle and structural features were discussed. By analyzing its kinematics, the operation process of the machine was divided into three phases., accelerating, pressing and buffering. The force function was derived by means of the displacement function. Dynamic analysis and simulation of this machine were conducted by Using ADAMS. The result showed that the driving force could ensure the startup of the piston in the acceleration phase and make the piston obtain a velocity of 6 m/s in a short period of time; the accumulator in pressing phase, however, could not provide enough driving force, so that the accumulator should be re-designed; piston moved well in buffering phase and successful buffering was achieved.