उद्योग बातम्या

बोल्ट शक्य तितक्या कडक केले पाहिजेत?

2021-06-22
एक पेचलेलाबोल्ट is subjected to two forces, one is downward and the other is upward. Theबोल्ट 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 tightenedबोल्ट should ensure that the upper and lower forces are balanced with each other. Due to the function of बोल्ट, the material ofबोल्टs has two requirements, one is rigidity and the other is toughness, both of which are indispensable.

परंतु सर्व तन्य पदार्थांमध्ये एक गोष्ट समान आहे, ती म्हणजे ताण सहन करण्याची मर्यादा. यांत्रिकीमध्ये, ही मर्यादा ताण-ताण वक्र द्वारे दर्शविली जाते. आम्हाला फार गूढ असण्याची गरज नाही. आम्हाला फक्त हे माहित असणे आवश्यक आहे की स्क्रू करण्याच्या प्रक्रियेतबोल्ट, theबोल्ट is a kind of elastic part, and its elasticity will take effect.

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