Preload of high-strength torsion shear bolt - the strength bolt of steel structure is realized by tightening the nut. The preload is usually controlled by torque method, angle method or breaking the bolt tail. At present, there is a special wrench to display the torque Through the relationship between the measured torque and bolt tension, the applied torque reaches the necessary over tension value.

转角法转角法分为两步，一是初始拧紧，另一个是更终拧紧。 简单的说，初拧一般是工人用普通扳手使被连接的部件紧密贴合，zui终拧紧是以初始拧紧位置为起点，更终拧紧角度为根据螺栓直径和层压板的厚度确定。

Angle method angle method is divided into two steps, one is initial tightening, the other is final tightening. In short, the initial tightening is generally that the workers use an ordinary wrench to make the connected parts closely fit, zui the final tightening is based on the initial tightening position, and the final tightening angle is determined according to the bolt diameter and the thickness of the laminate.

用强力扳手转动螺母，当拧到预定角度值时，螺栓的拉力可以达到所需的预紧值。 为防止高强度螺栓受外界环境影响而改变扭矩系数，一般初、终拧紧应在同内完成。高强度扭剪螺栓的受力特性与一般高强螺栓的受力特性相同，只是施加预紧力的方法是通过破坏螺栓头切口的横截面来控制预紧力的值。

Turn the nut with a strong wrench. When it is screwed to the predetermined angle value, the tension of the bolt can reach the required pre tightening value. In order to prevent the torque coefficient of high-strength bolts from being changed by the external environment, the initial and final tightening shall be completed in the same day. The stress characteristics of high-strength torsional shear bolts are the same as those of general high-strength bolts, but the method of applying preload is to control the value of preload by destroying the cross section of the bolt head notch.

摩擦式高强度扭剪螺栓连接完全依靠被连接部件之间的摩擦阻力，摩擦阻力不仅是螺栓的预紧力，还取决于由以下因素决定的防滑摩擦面连接元件材料及其接触面的表面处理。 看完相信大家已经基本明白高强度螺栓应该用在什么地方以及正确的操作和拧紧了。

Friction type high-strength torsional shear bolt connection completely depends on the friction resistance between the connected parts. The friction resistance is not only the preload of the bolt, but also depends on the surface treatment of the connecting element material and its contact surface determined by the following factors. After reading, I believe you have basically understood where high-strength bolts should be used and the correct operation and tightening.

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Jinan Wanzhong wrench has focused on wrench production for many years. We always believe that only good products can bring customers service. If you have more questions, please pay attention to our website: https://www.xjnwz.com