Summarizing the key features of hydraulic and pneumatic type of high-speed shear for bar, finished the optimization of the mathematic model of dynamic system of accelerating and pressurizing course, obtain the equations of motion.

• 根据液气式高速棒料剪切机的工作性质,对动力系统加速阶段和加压阶段的数学模型进行优化,得到了系统不同阶段的运动方程。