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FAQ
- What devices must be available for all hand held electric tools?
- Anti leakage, splash prevention, anti movement, anti overheating
- What's the difference between a flashlight and an electric screwdriver?
- Equipped with torque regulation and restriction mechanism, electric tool for screwing and unscrewing screws, the electric tool, mainly used for assembly line. Is one of the necessary tools for most manufacturing enterprises.
- How are hand powered tools classified into class I, class II, class III?
- Class I protection against shock of the product depends not only on the basic insulation of the equipment, but also on additional safety precautions. The method is to connect the electrically conductive parts that may be touched with the protective wires in the installed stationary lines so that the accessible, electrically conductive parts are not electrified in the event of basic insulation damage. Such products are: hand-held power tools, mobile daily appliances, mobile mechanical and electrical equipment.
- How to detect the rotor of power tools?
- Rotor inspection. 1) a self made short circuit device can detect damage. 2) you can detect with a pointer type multimeter.
- What is the working principle of power tools?
- An electric motor that rotates by alternating current is called an alternating current motor. There are many kinds, mainly:A, the series excitation motor - rectifier DC generator for AC motor, namely into this kind of motor, at the same time shift due to alternating current in the magnetic field and the armature circuit, therefore, the direction of the torque constant remains unchanged, the machine is kept turning. This kind of motor can also be used as AC and DC, so it is also called universal motor". Vacuum cleaner, sewing machine and other household appliances, etc..B, an induction motor -- a device that rotates the rotor in the rotating magnetic field and causes the rotor to rotate due to the action of eddy currents. Rotating magnetic field is not caused by mechanical method, but by alternating electric flux in the number of electromagnets, so that the magnetic properties of the cycle of change, can be seen as a rotating magnetic field. Usually three-phase induction motor (with three pairs of magnetic poles) is used. The motion of the DC motor is just the opposite of the direct current generator. In the generator, the induced current is formed by the induced electromotive force, so they are in the same direction. In an electric motor, the current is supplied by an external power supply, and the direction of the induced electromotive force is in opposition to the armature current I.C and synchronous motor - the motor with the armature from one pole to the second pole, just the same as the current that turns into the current. This kind of motor cannot start on its own and must be operated by another motor or special auxiliary winding so that the proper frequency can be reached before it can be switched on. If the load changes and the speed changes, the speed is not in line with the AC frequency, so that the pace of disturbance, tend to stop or cause damage. Due to restrictions, it is not widely used.
- How are the I, II, and III classes of power tools classified?
- The popular point is that:The 1 type of tool is metal housing with ground wire.The 2 type of tool is the insulated housing.The 3 type is low voltageOfficial point of explanation can be searched for power tool category ~!
- What material does the power tool housing fit?
- The hammer and drill: used for concrete, brick and building components on drilling, slotting, dehairing. Combined with expansion bolt, various pipelines can be improvedInstallation speed and quality of machine tools.Concrete vibrator: used for pouring concrete foundation and reinforced concrete members, tamping concrete to eliminate air holes and increase strength. Among them, electric straightThe high frequency disturbing force of the combined vibrator is driven by the motor to rotate the eccentric block, and the motor is powered by 150Hz or 200Hz intermediate frequency power supply.The planer: used for planing wood or wood structure, mounted on the bench can be used as a small bench plane. The planer cutter shaft by the motor shaft through the belt drive
- What are the commonly used rotor types for power tools?
- Concrete vibrator: concrete used for pouring concrete foundations and reinforced concrete members to eliminate porosity and increase strength. The high-frequency disturbing power of the electric direct acting vibrator is driven by an electric motor to rotate the eccentric block, and the motor is powered by an 150Hz or 200Hz intermediate frequency power supply.The planer: used for planing wood or wood structure, mounted on the bench can be used as a small bench plane. The planer cutter shaft by the motor shaft through the belt drive.