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来源: 日期:2023-10-12 发布人:admin


Impact wrenches are suitable for ordinary bolts, while fixed torque wrenches are suitable for the initial and final tightening of high-strength bolts (continental angle type); The torsion wrench is suitable for the final tightening of high-strength bolts (plum blossom type).
Note: The working efficiency of impact electric wrenches is relatively high, usually with more than 1000 impacts per minute. The initial tightening of plum shaped high-strength bolts can be achieved using a fixed torque electric wrench or an impact wrench, while in general, the construction process of continental angle high-strength bolts requires high torque accuracy for initial tightening, requiring the use of corresponding torque fixed torque wrenches for construction.
The torsion shear type electric wrench does not require calibration.
Unlike fixed torque electric wrenches, torsion shear electric wrenches require verification of torque accuracy. They only break the torx head of high-strength bolts, completing their job purpose.
Because when using a torsion shear electric wrench, align the head of the torsion shear electric wrench with the high-strength bolt head of the torsion shear type, press the switch to start working, and after a few seconds, the bolt ring head will be twisted and broken. Pull out the wrench and pull the trigger to eject the ring head, which ends the work. Electric wrenches are mainly used in the steel structure installation industry, specifically to install high-strength bolts for steel structures. High strength bolts are used to connect steel structure joints, usually in the form of bolt groups. High strength bolts can be divided into two types: torsional shear type and large hexagonal type. There are four types of national standard torsional shear type high strength bolts: M16, M20, M22, and M24. Currently, there are also two types of non national standard bolts: M27 and M30; The national standard large hexagonal high-strength bolts include M16, M20, M22, M24, M27, M30, and other types. Generally, the tightening of high-strength bolts requires initial tightening before final tightening, and each step requires strict torque requirements. The initial tightening of torsion shear high-strength bolts can be achieved using an impact electric wrench or a fixed torque wrench, while the final tightening must be achieved using a torsion shear wrench; The initial and final tightening of large hexagonal high-strength bolts must use a fixed torque wrench. Therefore, various electric wrenches are designed for various tightening needs.
The impact electric wrench is mainly used for initial tightening of bolts, and its use is very simple, which is to align the bolt and pull the power switch. The electric torque wrench is mainly used for final tightening of torque shear high-strength bolts. Its use is to align the bolt and pull the power switch until the plum blossom head of the torque shear high-strength bolt is broken. The electric fixed torque wrench can be used for both initial and final tightening. Its use involves adjusting the torque first and then tightening the bolts. Electric angle wrenches mainly belong to a type of fixed torque wrench, which is used to adjust the rotation degree first and then tighten the bolts. Electric angle wrench is a type of electric wrench specifically designed to tighten bolts at the angle of a steel frame, and its use is the same as that of an electric torsion wrench.
The electric torque wrench, as the name suggests, is a tool for tightening the torx head bolts, helping you install and remove bolts and nuts, while also accurately controlling the tightening torque. By using bolts to set torque, when the wrench reaches a certain torque, the plum blossom part of the bolt can be cut off. The torque accuracy and axial tension are ensured by the V-shaped notch of the fixed torque of the bolt. The disassembly and assembly torque is large and more secure and reliable than manual work. Convenient, beautiful, practical, and easy to carry with the car. Widely used for construction operations of steel structure bridges, factories, power generation equipment, and other facilities.
The characteristics of electric wrenches include: (1) long service life, (2) good heat dissipation of handle and casing materials, (3) high power, (4) strong impact resistance, and (5) cost-effective hand use
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