| Popis: |
In the textile manufacturing, development of sewing mechanisms with optimal performances is very significant. Obviously, the quality of sewing, decrease the sewing machine vibration and the optimal mechanical advantage are greatly dependent on the design criteria of the sewing mechanism. Therefore, this paper presents a multi-objective design optimization of a sewing machines. The needle jerk, the coupler tracking error and the transmission angle index are minimized simultaneously. The aim is to reduce the sewing machine vibration, guarantee a proper stitch formation and ensure the most effective transmission of motion, respectively. The multi-objective colonial competitive algorithm (MOCCA) is used to perform the design optimization. The obtained results confirm improvement of the required design criteria of the sewing mechanism in this study. It is also concluded that the optimized mechanism has 35% less needle Jerk and 20% reduction in term of the transmission angle index (TA) than the one for the Juki machine. |
