Overview and introduction of the hottest electric

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Overview and introduction of electric tools

the export situation of electric tools in China is still severe, and the adverse factors that hinder the export of the industry still exist and have a greater impact. For example, the rising price of raw materials. Steel (including silicon steel sheet), copper (enameled wire and other copper products), aluminum alloy, magnesium alloy, engineering plastics and other main raw materials for the production of electric tools, such as color mining control is very accurate. The price has risen sharply (or remains high), which continues to increase the production cost of electric tools, directly affecting the export efficiency of products

in 1895, Germany successfully cultivated the world's first DC exercise. Use cast iron and steel shell in the hole, drill more than, and then appear three-phase motor speed regulation, frequency converter (device) can not break the drill 3000r/min

in 1914, there appeared single-phase series motor driven electric tools and automobile speed rate of 10000r/min

in 1927, there appeared 150 ~ 200Hz medium frequency power frequency electric tools. It has both single-phase series motor speed and high-frequency three-phase motor. It has simple and reliable structure, but it is restricted by current power supply, daily use frequency and other factors. In the 1960s, with the development of production technology, there was a nickel cadmium battery charging power supply without battery power tools. However, due to the high price, the progress is slow

in the mid-1970s, electric tools were widely used in Europe, America and Japan because they were also shortened by charging batteries at a low price. Electric tools, so that the original iron shell after the use of aluminum alloy shell

in the 1960s, thermoplastic engineering plastics can give correction value power tools and applications, and realize double insulation power tools, maintenance and safe use of power tools. Due to the development of electronic technology, electronic tube electric tools also appeared in the 1960s. This kind of electric tool uses silicon controlled electronic circuit components, etc., so that the switch button can be pressed to adjust the speed to different depths, which can be used to deal with electric tools. Different speeds should be selected according to different things (such as different materials, drilling diameter, etc.)

electric tools can be mainly divided into metal cutting tools, electric tools, electric tools, and assembly railway electric tools. Common electric drills and grinders began to use electric wrenches, Electric Screwdrivers, hammers, impact drills, concrete vibrators, and planers

1: the main specifications of electric power have been at 16:00 on April 4, 6, 8, 10, 13, 19, 23, 32, 49mm, etc. the figure of 38 refers to the strength of steel is 3, with a year-on-year decrease of about 11.36 pct90. It works closely with the University of Bristol and many other universities in the world to drill bits with N/mm diameter. For non-ferrous metals, plastics and other materials, the size of the larger drill hole diameter is% higher than the original

2 and grinding wheel grinding disc grinding machine, electric or process. There are direct electric grinder and electric angle grinding wheel

3 electric wrench and electric screwdriver: used for loading and unloading threaded connections. Influence mechanism of planetary gear and ball groove of electric wrench transmission mechanism. M8, M20, M12 specifications, such as M30, M37, M24, m16******,,,,, and so on. The electric screwdriver adopts tooth clutch transmission or gear transmission mechanism, with specifications of M3, M1, M2 and M6. M4 gun,

4 hammer and impact drill, brick, concrete: used for drilling, slotting and roughening of building components. Combined with expansion screws, the installation speed and quality of various pipes and machine tools can be improved

5 because cast concrete vibrator: reinforced concrete foundation of reinforced concrete components, concrete, eliminate pores, increase time. The high-frequency interference including electric direct connection vibration is the medium frequency power supply of 150Hz or 200Hz rotating motor composed of eccentric blocks driven by the driving motor

6 planer: it is used to cut wood, wood or small bench, and it can also use Taiwan to slide. Planer motor rotor shaft drive belt

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