2107 アルミボトルの開けやすいキャップのねじ形状の検討(OS7-2 設計と最適化II～形状・寸法設計～,OS7 設計と最適化)

抄録

This paper has studied thread shapes of a cap of aluminum beverage bottle, which can be easily opened. Firstly, both the tightening torque and loosening torque of the well-used triangle thread and square thread are calculated. After that, a new thread shape, whose tightening torque and loosening torque are much smaller than those of the conventional threads, is proposed. Then, a simulation of existing aluminum bottle model is implemented by using a commercial software ANSYS. Moreover, three kinds of new thread shape models with different mountain angles are suggested to perform simulations and the opening torques of these three models are compared with each other. The comparison among the opening torques of three thread models with the theoretical values of the triangle screw and the square screw are made and discussed. Finally, it is found that the proposed new thread shape model shows a lower opening torque.