Electric torque wrench, also known as fixed torque electric wrench, is mainly used to tighten large hexagonal bolts with torque requirements. It can effectively improve the tightening quality and construction efficiency of high-strength bolts in steel structures. For steel structures, the fastening of high-strength bolts plays an important role.

鋼結(jié)構(gòu)中的大六角螺栓一般要先初擰再終擰，之所以要由初擰，主要是為了讓板疊密貼，減少一個節(jié)點板多個螺栓因為擰緊次序的原因造成軸力互相影響，一般研究認(rèn)為，在保證板疊密貼的情況下，初擰越小越好，因為初擰過大，尤其是超過70%以上，確實影響終擰精度。高強(qiáng)螺栓施工初擰扭矩大概是終擰的15%~20%，我們規(guī)定是50%，主要是因為在安裝鋼結(jié)構(gòu)過程中時，一部分桿件成懸臂狀態(tài)，節(jié)點板還要受力，初擰50%可以確保安裝進(jìn)度，節(jié)約螺栓(美國這種情況需要用工藝螺栓)，又能確保終擰精度。

The large hexagonal bolts in steel structures generally need to be initially tightened before being finally tightened. The reason for the initial tightening is mainly to ensure that the plates are stacked tightly, reducing the mutual influence of axial force caused by multiple bolts in a node plate due to the tightening sequence. Generally, research suggests that under the condition of ensuring the plate is stacked tightly, the smaller the initial tightening, the better because excessive initial tightening, especially over 70%, does affect the accuracy of final tightening. The initial tightening torque of high-strength bolts during construction is approximately 15% to 20% of the final tightening, and we stipulate it to be 50%. This is mainly because during the installation of steel structures, some members are in a cantilever state, and the node plate is also under stress. The initial tightening of 50% can ensure the installation progress, save bolts (in this case in the United States, process bolts are required), and ensure the final tightening accuracy.

電動扭矩扳手優(yōu)勢：

Advantages of electric torque wrenches:

1、電動扭矩扳手型號齊全，種類多樣，可滿足您施工的需求

1. The electric torque wrench has a complete range of models and various types, which can meet your construction needs

2、電動扭矩扳手生產(chǎn)控制嚴(yán)格，品質(zhì)優(yōu)良，且每款機(jī)器出庫前都會進(jìn)行性能測試，使用壽命長

2. Electric torque wrenches have strict production control and excellent quality, and each machine undergoes performance testing before leaving the warehouse, resulting in a long service life

3、電動扭矩扳手整機(jī)體積小，重量輕，操作方便

3. The electric torque wrench has small size, light weight, and convenient operation

4、采用數(shù)顯控制器，扭矩可數(shù)字顯示，控制精度高

4. Adopting a digital display controller, torque can be digitally displayed, with high control accuracy