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阐述了往复式切割器的驱动机构——偏心轮曲柄摆杆机构的基本结构与工作原理,运用矢量方法对机构的运动规律进行了分析和理论推导,得出了机构的运动方程;利用动力学仿真软件ADAMS对该机构进行了运动仿真分析,得到了运动曲线图和对机架的激振力大小及变化规律。仿真结果表明:当输入转速为400 r/min时,切割器的运动周期是0.15 s,行程76 mm,速度为-1.5~1.73 m/s,加速度为-69.5~68.6 m/s2;切割器运动时对机架产生的作用力为简谐载荷,当输入转速为469 r/min时,载荷大小为1 393 N。通过理论与仿真分析,为偏心轮曲柄摆杆机构的优化设计和动力学分析提供了理论依据。
The basic structure and working principle of the reciprocating cutter driving mechanism - eccentric wheel crank and rocker mechanism are expounded. The motion law of the mechanism is analyzed and theoretically deduced by using the vector method. The kinematic equation of the mechanism is obtained. The simulation software ADAMS has carried on the movement emulation analysis to this agency, has obtained the movement curve diagram and to the frame vibration excitation force size and the change rule. The simulation results show that when the input speed is 400 r / min, the cutter’s movement cycle is 0.15 s, the stroke is 76 mm, the speed is -1.5 ~ 1.73 m / s and the acceleration is -69.5 ~ 68.6 m / s2. The cutter movement When the input speed of 469 r / min, the load size of 1 393 N. Through theoretical and simulation analysis, it provides a theoretical basis for the optimization design and dynamic analysis of the eccentric crank mechanism.