| 摘要 |
<p>The screw/non-threaded nut connection consists of a screw (1) and a nut (2), which internally have electrical resistances or gaps. Initially, at room temperature d2 <d1. When we increase the temperature inside the screw (1) and the nut (2), the dimensions (L, R, d1, and d2) expand. When the nut (2) passes from dimension d1 (d2> d1), we lower the temperature of the nut (2) thereby retracting the inner diameter d2 and tightening it round d1. When we lower the temperature of the screw (1 too), during cooling, its length will shrink (P) tightening the sheets. To uncouple, we first increase the temperature inside the screw (1) and, having expanded the length (P) at connection levels, we increase the temperature inside the nut (2) at the same temperature levels with these of connection, so that d2 > d1 and then remove the nut (2) from the screw (1).</p> |
