1. Confirm whether the power supply connected on site is consistent with the nameplate of the electric wrench. Whether a leakage protector is connected.
2. Select the matching sleeve according to the size of the nut and install it properly.
3. Confirm the switch on the electric wrench before power transmission, otherwise the electric wrench will turn immediately unexpectedly when the plug is inserted into the power outlet, which may cause the danger of personal injury.
4. If the work site is far from the power supply, when the cable needs to be extended, the capacity should be sufficient and the qualified extension cable should be installed. Extension cables such as through pedestrian aisles should be elevated or take measures to prevent the cable from being crushed and damaged.
5. Try to find the support point of the reverse force as much as possible when using it to prevent the reaction force from hurting people.
6. When the carbon spark of the motor is found to be abnormal during use, it should stop working immediately, check and process, and eliminate the fault. In addition, the carbon brush must be kept clean.
7. Standing on a ladder to work or working at a high place should take measures to fall from a high place, and the ladder should be supported by ground personnel.
Electric wrench inspection test and maintenance
1 The metal shell of the electric wrench should be reliably grounded, and its shell should have a regular inspection test certificate and be within the validity period.
2 Check the tightening of the installation screw of the electric wrench body, if the screw is found to be loose, it should be re-tightened immediately, otherwise it will cause the electric wrench to fail.
3 Check that the handles on both sides of the handheld electric wrench are intact, can be damaged without cracking, and are firmly installed.
Features of electric wrenches:
(1) Long service life
(2) The handle and casing material have good heat dissipation
(3) High power
(4) Strong impact resistance
(5) The most cost-effective use of hands
Electric torsion shear wrench is a kind of final torsion shear type high-strength bolt tool, generally there are electric torsion shear wrenches and manual torsion shear wrenches, of which electric torsion shear wrenches are more common.
Application of twist shear wrench:
The initial tightening of torsion-shear high-strength bolts can use an impact electric wrench or a fixed torque wrench, and the final tightening must use a torsion-shear wrench, so the torsion-shear wrench is specially designed for the final tightening of torsion-shear high-strength bolts.
Use of twist and scissor wrenches:
The torsion shear wrench is mainly for the final tightening of the torsion shear type high-strength bolt, and its purpose is to break the plum blossom head of the torsion shear type high-strength bolt. When working, align the wrench head with the bolt head, pull the switch to start working, after a few seconds, the bolt plum head will be twisted, and then pull out the wrench to pull the trigger to eject the plum blossom head, that is, end the work.
Features of the twist and scissor wrench:
Easy to operate, time-saving, labor-saving, safe and convenient.
Electric wrench application
Electric wrenches are mainly used in the steel structure installation industry, specializing in the installation of steel structure high-strength bolts, high-strength bolts are used to connect steel structure contacts, usually in the way of bolt groups. High-strength bolts can be divided into two types: torsional shear type and large hexagonal type, the national standard torsion shear type high-strength bolts are M16, M20, M22, M24 four, non-national standard M27, M30 two; The national standard large hexagonal high-strength bolts are M16, M20, M22, M24, M27, M30 and so on. Generally, the tightening of high-strength bolts must be tightened first and then finally tightened, and each step requires strict torque requirements. Both the initial and final tightening of large hexagonal high-strength bolts must use a constant torque wrench. Therefore, all kinds of electric wrenches are for various fastening needs.
