Electric impact wrench, is a rotating panel hand with tangential impact mechanism. The adverse effects of the work of the operator torque is small. Below small make up to introduce the impact of the development of electric wrench: type electric impact wrench development to the present, can be roughly divided into the following three generations of products: type, impact the first generation of the world's first electric wrench type electric impact wrench in years, was born in the United States. The first born in the year. The current domestic production and exports the largest electric wrench is still electric impact wrench, price is low, a commonly used impact type electric wrench market prices only a few hundred yuan, this is can't do other kinds of electric wrench. , the second generation of type electric impact wrench, namely hydraulic impulse type electric wrench the first generation of impact type electric wrench while compared with other types of electric wrench has the advantage of high efficiency and no need to overcome the reaction, but the biggest drawback is the difference in noise and torque accuracy. The second generation of hydraulic impulse type electric wrench has inherited the advantages of the first generation of impact wrench, overcome its disadvantages. Will impact to hydraulic pulse unit structure, the component is located in the motor speed reducer and the output shaft. Due to the pulse duration is very short, and its effect on the handle of the reaction is almost zero, only a very small part of the motor torque to the operator's arm. Pulse element motor output torque can be extended to The Times. Because there is no metal to metal in the pulse tools, so the impact wrench, pulse tools provided by the pulse is more soft and easy to control, and the vibration and noise level is very low. Good balance and light weight, the above advantages make such tools is very easy to operation. Makes the continuous tool reliability and precision, the ideal of mass production tools. , the third generation impact type electric wrench, that is the second generation of digital sensor hydraulic pulse type electric impact wrench while torque accuracy than the first generation of improved, but the torque output is still not intuitive, the fixed Angle of process of widely used does not support. The third generation type electric impact wrench on the basis of the second generation joined the torque sensor and Angle sensor, can display the wrench of the final output torque or rotation. The impact of the third generation impact wrench is by far the most perfect type electric wrench, besides precision is better than the best electric constant torque wrench, efficiency and no reaction won a torque wrench.
