The final tightening of torsional shear high-strength bolts requires the use of torsional shear electric wrench.
At present, high-strength bolts are classified into large hexagon high-strength bolts and torsional shear high-strength bolts. Each kind of high-strength bolt must be tightened first and then finally.
The initial tightening of torsional shear high-strength bolts can choose impact electric wrench, constant torque electric wrench or torsional shear electric initial tightening wrench, which generally reaches 50-60% of the final tightening torque. The final tightening of torsional shear high-strength bolt must use torsional shear electric wrench, because the final tightening of torsional shear high-strength bolt needs to break its plum blossom head.
Electric torsional shear wrench is a mechanized construction tool for assembling threaded parts and bolts, which has the function of automatic torque control. It is widely used in the erection of bolted and welded bridges, and the installation of plants, towers and chemical, metallurgical and power generation equipment. Large machinery, lifting equipment and vehicle assembly operations, as well as occasions with strict requirements on the torque and axial tension of threaded fasteners.
Tightening operation method of electric torsion shear wrench bolt
1. Install the reaction support and tighten the screws. Start the main engine so that the square head pin hole corresponds to the reaction support hole, then install the wrench socket, insert the pin and fix it with a rubber ring.
2. Adjust the torque knob of the controller to the required torque value, turn the forward and reverse switch of the host to the forward position, and put the wrench socket on the hexagon of the threaded connector.
3. Press the power switch and the wrench starts. When the force arm of the reaction support is firmly against the support (the fulcrum can be an adjacent bolt or other position that can be used as the fulcrum), the bolt begins to tighten. When the bolt torque reaches the predetermined torque, the wrench will automatically stop, the tightening is completed, loosen the power switch and tighten the next bolt.
4. After the wrench stops automatically, the elastic deformation force of the reaction support makes the support force arm automatically separate from the fulcrum and remove the wrench. If the force arm cannot be separated from the fulcrum, turn the positive and negative switch and click the power switch wrench to remove it.
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