final tightening torque

The establishment method of srew tightening force－torque diagram is introduced, the application of the diagram to the design of tightening process for torque tightening method is presented, and the applications to the selection of srew grade and size and to the deciding the torque for screw delay fracture test are described.

本文介绍了螺栓预紧力-扭矩图的建立方法，阐述了在使用扭矩拧紧法时预紧力-扭矩图在拧紧工艺设计中的应用，并说明了预紧力-扭矩图在选择螺栓等级或螺栓尺寸方面的应用和确定螺栓延时断裂试验所用扭矩的应用。