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| Electric tool development situation |
| Add the date£º2015-4-3¡¡¡¡¡¡¡¡This article has been 7230 People visit |
| In the '60 s, follow battery manufacturing technology development, the flush with nickel cadmium battery power battery electric tools without the power cord. But at that time, because of the expensive, development is slow. To the mid and late 70 s, due to price battery, charging time is shortened, the electric tool widely used in Europe and the United States, Japan. After electric tool was originally cast iron shell, use aluminum alloy shell. In the '60 s, thermoplastic engineering plastics used in electric tools, and double insulation and implements the electric tools, guarantee the safety of the use of electric tools. Because of the development of electronic technology, a electronic speed on electric tools in the 60 s. This kind of electric tools using thyristor components of electronic circuits, such as to switch the depth of the snap button is pressed into the different to adjust speed, so that the power tool when use object can be processed according to the different (such as the material is different, the hole diameter size, etc.), choose a different speed. |
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