静态和动态扭矩

1、Static vs. DynamicTorque 静态和动态扭矩Dynamic Torque 动态扭矩:Dynamic torque is the accepted Strategy for fastening in General Motors.This method is used by the Bosch electric wrehches in Powertrain Assembly 动态扭矩是通用汽车公司认可的拧紧方式。动力总成装配线上的Bosch电动 扳手就是使用这个方法.Static Torqu静态扭矩:Static Torque is the method used when

2、a bolt is rechecked with a manual torque wrench.Static Torque is not the accepted method for fastening in General M otors 当用手动扳手重新检测螺栓时，则采用静态扭矩，静态扭矩不是通用汽车公 司认可的拧紧方式。Static vs DynamicTorque 静态和动态扭.矩的比较:Dynamic torque is much more accurate and repeatable then static torque.There is normally a differen

3、ce between dynamic torque readings and static torque rechecks The difference depend on the characteristics of each joint and each bolt. Factors contributing to this difference include动态扭矩比静态扭矩更加准确，重复性更强。动态扭矩的读数与重检静态扭矩的读数通常是不相同的而且不同的粘结点，不同的螺栓，差别程度又有所不同。造成读数差异的主要因素包括：1 Soft joints(gaskets and sealers)

4、软性粘结点(衬垫和密封圈)2 Time after fastening 拧紧的时间3 . Condition of the part(haS ii been run?) 工件的状态(是否已经用过了?)Do not be alarmed by a difference between the dynamic torque and a statiC recheck This is a normal condition 若发现动态扭矩和静态重检扭矩读数不同，请不要紧张这是正常现象Since a static recheck is less accurate than the original dyn

5、amic torque and the recheck disturbs the good joi，ntit is not a good practice to recheck good pa rtS Static rechecks should only be used during rep， airesjected parts analysis or as part of a teardown aud itDO not statically recheck good engines or transmissions. 由于静态重检不如原先的动态扭矩准确，而且还会损坏好的粘结点，所以对合格工

6、件进行重新检测不是一个好方法静态重检应只限于工件返修，工件故障分析或工件拆卸检查不要对好的发动机或变速箱进行静态检查A database of static v sdynamic values will be developed as part of the teardown audits by the quality department.This is the only reliable way to gather sufficient data to understand this problem通过工件拆卸检查，质量部将制定一张静态和动态数值对比表.这是唯 个较为可靠的数据收集方法，能帮助我们更好地理解问题.一Harry GallagherPlanning Engineering 规划工程 Steve IvesEngi