What Is a Power Wrench?

Electric wrench is a power tool for tightening and loosening bolts and nuts. It is a tool for tightening high-strength bolts. It is used for the initial screwing, final screwing and torsional shearing of high-strength high-strength bolts for the construction of steel structure bridges, plant buildings, chemicals, and power generation equipment. Where strict requirements apply.

The product name and model of the electric wrench are different, and the range of use is also different. Here is a constant torque electric wrench for reference.

Constant torque electric wrench is an electric wrench that can automatically control torque. It is suitable for bridge structures, large steel towers,

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Electric wrenches are available in two types: safety clutch type and impact type.

The safety clutch type is a structural type that uses a safety clutch mechanism that trips when a certain torque is reached to complete the assembly and disassembly of the threaded parts; the impact type is a structure that uses an impact mechanism to complete the assembly and disassembly of the threaded parts with its impact torque. The former is generally suitable for the manufacture of electric wrenches of M8mm and below due to its simple structure, small output torque and a certain reaction torque; the latter has a complex structure and high manufacturing process requirements, but its output torque is large and reaction torque Very small, generally suitable for manufacturing larger size electric wrenches.

The impact electric wrench is composed of a motor, a planetary gear reducer, a ball spiral groove impact mechanism, a forward and reverse power switch, a power connection device and a motorized sleeve.

Impact type electric wrenches are single-phase series-excited electric wrenches and three-phase electric wrenches according to the type of motor selected.

The motor of the single-phase series-excited electric wrench is housed in a plastic housing. The plastic shell is used as both a structural part supporting the motor and an additional insulation of the motor stator. When the impact electric wrench is used to assemble or disassemble the screw, there is a large axial tension between the end face of the plastic housing of the device motor and the plastic front cover of the device planetary gear reducer and ball spiral groove impact mechanism, as well as the planetary gear. The reducer requires high assembly accuracy, so metal inserts are set at the plastic housing's mouth, bearing room and threaded joints to enhance the rigidity of the housing, improve the processing accuracy of the plastic housing, and the axial force of the joints. ability. ^[2]

1) Before the tool is powered on, you need to check that the switch is off before you can insert it.

2) Check whether the power supply on site matches the voltage required by the electric wrench and whether a leakage protector is connected.

3) Select the matching sleeve according to the nut size and install it properly.

4) The voltage is too high or too low.

5) Do not use Simplified Chinese as a hammering tool.

6) Don't add force after adding a sleeve or pry bar to the hand rocker.

7) The metal shell of the electric wrench needs to be reliably grounded.

8) Check the tightening of the mounting screws on the body of the electric wrench. If you find that the screws are loose, tighten them immediately.

9) Check whether the handles on both sides of the hand-held electric wrench are intact and whether the installation is firm.

10) When standing on a ladder or working at heights, take measures to prevent falling from heights.

11) If the work place is far from the power source and needs to extend the cable, you need to use a sufficient capacity and install a qualified extension cable. ^[4]