基于ADAMS的共轭凸轮打纬机构动态设计与仿真

Dynamic design and simulation of conjugate cams beating-up mechanism based on ADAMS

首先,利用Solid Works软件对正余弦组合式加速度运动规律的共轭凸轮打纬机构进行三维建模,在ADAMS软件环境下进行动态仿真,得到的筘座运行响应与理论运动规律几乎一致,验证了样机凸轮廓线设计的正确性;其次,在共轭凸轮的两个滚子与凸轮之间加入碰撞副后,筘座的角加速度波动明显,说明了滚子与凸轮间的接触碰撞会加剧机构振动;滚子与主、副凸轮间接触力交替变化,说明设计的打纬机构能够实现惯性打纬的要求;最后,提出了通过改变筘座材料属性来减小滚子与凸轮间接触力的方法.

Firstly, a model of the conjugate cams beating-up mechanism with sine and cosine curve is created by Solid Works, then the whole system is simulated with ADAMS. The sley operation response and theory movement are almost the same, which indicates that the design of the cam profile is correct. Secondly, adding the collision pairs between the two roller and the cam, the angular acceleration of sley fluctuates significantly, which indicates that the vibration of the mechanism is increased due to the contact between the roller and the cam. The alternate changed contact force between the roller and the main sub cams indicates the design of the beating-up mechanism can meet the requirements of the inertia beat up. Finally, a method for reducing the contact force between the roller and the cam is proposed by changing the sley materials.