산업 뉴스

볼트를 최대한 조여야 합니까?

2021-06-22
나사볼트 is subjected to two forces, one is downward and the other is upward. The볼트 rotates down along the thread, and a downward axial force is generated in the process of contact with the thread.
At the same time, there is an upward force corresponding to the downward axial force. This force comes from the upward distributed force generated by the contact between the nut and the lower plane. A tightened볼트 should ensure that the upper and lower forces are balanced with each other. Due to the function of 볼트, the material of볼트s has two requirements, one is rigidity and the other is toughness, both of which are indispensable.

그러나 모든 연성 재료에는 한 가지 공통점이 있습니다. 즉, 응력 내성에 한계가 있습니다. 역학에서 이 한계는 응력-변형률 곡선으로 표시됩니다. 우리는 너무 난해할 필요가 없습니다. 우리는 나사를 조이는 과정에서볼트, the볼트 is a kind of elastic part, and its elasticity will take effect.

볼트점차적으로 조여지면 탄력 효과가볼트 will approach a limit. Once this limit is broken, the볼트 will enter the yielding stage from the elastic stage.
Once the볼트 enters the yield stage, it will produce permanent deformation. This deformation is irreversible, which means that the볼트 will fail. In real life, the phenomenon of tripping when we continue to tighten the볼트 is caused by this reason, and once it is tripped, it is impossible to screw it again, because the볼트 has been permanently deformed, and it can be seen that the볼트 is not screwed properly the tighter the better.