Most of grinder is high-speed rotating of wheel processing of grinding, a small is using oil stone, and sand with, other abrasives and free abrasive for processing, as honing mill machine, and Super fine processing machine, and sand with grinder, and grinding machine and polishing machine,: from professional electric tool market of development trend see, electric tool most is handheld for operation, so except requirements electric started has high of performance outside, also requirements electric tool lightweight, and operation comfortable, and function diverse, and on operation who and environment no against. In recent years, foreign professional power tools products and technology trends are as follows:

　　, Electronic technologies are widely applied: Electronics technology in theapplication of professional power tools, tool can not only improve operationalperformance and improve processing quality, enhance the flexibility of use,increase the added value of products, the power tool to a new stage ofdevelopment. Current applications include:

　　1, electronic speed control, speed control technology: electronic speed controlis the earliest use of the electric tool, can make the power tool at a set speedrange realize stepless speed regulation, available at low speed on brittlematerials when locating, drilling, so as to improve the quality. Electronic control speed technology is through has feedback of full wave control line makes single-phase series Reed electric tool in rated load Shi of speed and no-load speed basic same, or automatically ensure operation maintained in scheduled of speed, not only can greatly improve operation efficiency, and significantly reduced no-load noise and vibration, and can extended motor using life, special applies Yu harsh conditions Xia operation of power, high speed electric tool Shang, currently has in single-phase series Reed electric tool of angle to polished machine, and impact drill, and electric round saw, and curve saw, andElectric router and other products.

　　2, Mechatronics intelligent power tools

　　With the development of electronic technology, recently there have been a number of mechanical and electrical integration of the electric tool. It is usingsingle-chip installed in the chassis, chassis did not reset the display andControl Panel tool operation is controlled through Control Panel, has selectedsuperior control functions and operation functions. Some products through themicrocontroller or industrial controller automation screw Assembly torque andtorsional angle, so as to improve efficiency, ensure high accuracy, improvingAssembly quality. Intelligent power tools of single-phase series excitation toolimpact drill, jigsaw, torque wrench and screw on the intelligent Assemblysystem. In addition to the protection with electronic temperature control,electronic torque control and electronic energy control technology has beenapplied in power tools.

　　Second, battery-rapid development of professional power tools: the entire 21stcentury, power tools in the world production and sales based on single-phaseseries excitation electric tools. 80-90 's wide use of electronic technology andnew development of single-phase series excitation power tools. But with thebattery-driven tools, especially the performance of rechargeable battery andrapid charger development, rapid development of battery-driven tools, has becomethe development trend of power tools. Major foreign power tools manufacturingcompanies predicted that the current trend is toward the cordless tooldevelopment. Foreign cordless tools have more than 50 varieties, such ascordless drills screwdrivers, cordless angle grinder, batteries, electrichammers, cordless circular saw, cordless saws, cordless jig saw, cordlesslawnmower, shrub shear. In recent years, with the increase of the batterycapacity and the development of electronically controlled quick charger, not only can be fully charged within 15 minutes, and extended battery life.

　　Third, actively develops human-friendly professional power tools: electric toolsmostly hand operation, professional power tools, electrical safety, vibration,noise, electromagnetic interference has a certain influence on the human body.Currently in power tools there are many health hazards of harmful substances(such as cadmium, lead, etc). Electric tools used will pollute the environmentwhen debris, dust, etc. According to reports, United States Assembly industrywhen they operate using a screwdriver, wrench, 23,000 people a year suffer fromcarpal tunnel syndrome, medical and disability costs US $ 1.15-230 million per year. In order to protect human health, environmental awareness and achievingsustainable development, actively developing abroad to prevent harm human healthand the protection of the environment and environment-friendly greenprofessional power tools. Green power tools there are basically two types: oneis designed according to ergonomic principles and development of power tools,greatly reduce the damage caused by the operator of the tool itself; the otheris power tool development no harmful substances.

　　Four, professional power tool power per unit weight and constantly improving

　　Professional electric tools are lighter, more powerful, constantly increasingoutput per unit weight is the direction of continuous development ofprofessional power tools. In recent years, professional power tool power per unit weight and further enhance, improve output per unit weight is the main wayto improve speed; the second is opening temperature, three is the new materialwith good performance. In addition to increasing the motor speed to improve thespeed, but another important measure is the introduction of electronic speedcontrol or constant speed, rated speed with no load speed is basically the same,to improve output. In terms of opening temperature, such as the United Stateselectrical insulation structure of electric tools heat-resisting rank from e-improving the NB-level, current United States insulation structure of electric power tools using the b-class, therefore reducing the volume of the motor,reduce the weight. In terms of using new materials abroad are studying theapplication of magnesium alloy in power tools. Characteristics of magnesium alloy with low density and high mechanical strength, instead of aluminum alloyto lighten the weight of power tools. Our country is rich of magnesium, is currently focusing on magnesium alloys melting and molding technologies,recycling and safety, and other key technologies and strive for an earlyapplication in power tools.

　　Above is the international professional electric power tools on the markettrends and technological development trend of the development of ourprofessional power tool will be updated. By learning advanced foreign technologyand accurate analysis of the market trends, China will not only become aprofessional electric tools production power and become a professional electrictools production power.

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