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摘要
Aiming at the problems of the poor motion stability and low motion accuracy of the rapier belt of the spatial four bar weft insertion mechanism, the optimization design of the mechanism was studied from two aspects of motion parameters and structural stiffness. Firstly, the motion law of the rapier belt is analyzed by using the theory of space mechanism, and its correctness is verified by software simulation, which provides a theoretical basis for the optimization design. Then, with the goal of minimizing the maximum acceleration of the rapier belt and the constraint condition of satisfying the weft insertion process and performance requirements, the parametric modeling of ADAMS was used to optimize the mechanism. Considering the flexibility of the weft insertion mechanism at high speed, a rigid-flexible coupling model was established and simulated, and the influence of the flexible deformation of each component on the motion accuracy of the rapier belt was analyzed. Finally, taking the connecting rod as an example, aiming at reducing the acceleration error of the rapier belt, a method was proposed to reduce the influence of flexible deformation by increasing the section size and structural stiffness. The results show that the maximum acceleration of the belt decreases by 35.7% after optimizing the motion parameters, and the motion stability is improved. After optimizing the structure stiffness, the acceleration error of the rapier belt is obviously reduced and the motion accuracy is improved.
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单位桂林理工大学
