靜態(tài)和動(dòng)態(tài)扭矩

1、Static vs. DynamicTorque 靜態(tài)和動(dòng)態(tài)扭矩Dynamic Torque 動(dòng)態(tài)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 動(dòng)態(tài)扭矩是通用汽車公司認(rèn)可的擰緊方式。動(dòng)力總成裝配線上的Bosch電動(dòng) 扳手就是使用這個(gè)方法.Static Torqu靜態(tài)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 當(dāng)用手動(dòng)扳手重新檢測螺栓時(shí)，則采用靜態(tài)扭矩，靜態(tài)扭矩不是通用汽車公 司認(rèn)可的擰緊方式。Static vs DynamicTorque 靜態(tài)和動(dòng)態(tài)扭.矩的比較: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動(dòng)態(tài)扭矩比靜態(tài)扭矩更加準(zhǔn)確，重復(fù)性更強(qiáng)。動(dòng)態(tài)扭矩的讀數(shù)與重檢靜態(tài)扭矩的讀數(shù)通常是不相同的而且不同的粘結(jié)點(diǎn)，不同的螺栓，差別程度又有所不同。造成讀數(shù)差異的主要因素包括：1 Soft joints(gaskets and sealers)

4、軟性粘結(jié)點(diǎn)(襯墊和密封圈)2 Time after fastening 擰緊的時(shí)間3 . Condition of the part(haS ii been run?) 工件的狀態(tài)(是否已經(jīng)用過了?)Do not be alarmed by a difference between the dynamic torque and a statiC recheck This is a normal condition 若發(fā)現(xiàn)動(dòng)態(tài)扭矩和靜態(tài)重檢扭矩讀數(shù)不同，請不要緊張這是正常現(xiàn)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. 由于靜態(tài)重檢不如原先的動(dòng)態(tài)扭矩準(zhǔn)確，而且還會(huì)損壞好的粘結(jié)點(diǎn)，所以對合格工

6、件進(jìn)行重新檢測不是一個(gè)好方法靜態(tài)重檢應(yīng)只限于工件返修，工件故障分析或工件拆卸檢查不要對好的發(fā)動(dòng)機(jī)或變速箱進(jìn)行靜態(tài)檢查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通過工件拆卸檢查，質(zhì)量部將制定一張靜態(tài)和動(dòng)態(tài)數(shù)值對比表.這是唯 個(gè)較為可靠的數(shù)據(jù)收集方法，能幫助我們更好地理解問題.一Harry GallagherPlanning Engineering 規(guī)劃工程 Steve IvesEngi