中间坯快速剪切挤压连接机构特性分析与优化

Characteristic analysis and optimization of fast shear-extrusion joining mechanism for intermediate billets

在静态试验及大量数值计算的基础上提出一种中间坯快速剪切挤压连接机构,可以同时完成上、下剪刀的水平运动和相对运动,从而实现中间坯的快速连接。为了探究该机构的特性,基于ADAMS动力学分析软件,建立了连接机构的多刚体模型,仿真模拟了机构的运动过程,求得了连接机构上、下剪刀的运动轨迹和水平速度变化曲线,利用ADAMS中带约束的目标函数法进行了结构化设计,优化结果保证了中间坯的连接厚度,改善了连接过程中速度超前、滞后的问题,有助于中间坯连接过程的顺利实现,基于ADAMS的分析和优化方法为快速剪切挤压连接设备的结构设计奠定理论基础。

A fast shear-extrusion joining mechanism for intermediate billet was proposed based on static experiments and a large number of numerical calculations. The up/down movement and pendulum motion of the blades could be finished simultaneously to realize the fast connection of intermediate billets. In order to investigate the characteristics of the mechanism, a multibody model was established using the dynamic analysis software ADAMS. Movements of this mechanism were simulated. The trajectory and horizontal speed of the blades were obtained. The structuring design was performed using objective function with constraints law in ADAMS. Joining thickness was ensured and joining speed ahead-lag problems were improved successfully.The optimization results were helpful to the implementation of the intermediate billets joining process. Analyses and optimization based on ADAMS provided a theoretical foundation for the structural design of fast shear extrusion joining device.