124TH CANTON FAIR
Personal protection when using an electric drill
1.1 Face-up operations, to wear protective masks. Drilling pig iron castings to wear safety goggles to protect the eyes.
1.2 drill bit holder should be properly installed.
1.3 operating drill in a burning state, should pay attention to burns the skin.
1.4 drill Φ12mm handheld drill hole should be used side handle pistol drill.
1.5 work or work at heights on a ladder should be prepared to measures falling from height, the ladder should be ground staff support.
2, operating precautions
2.1 confirm the site connected to the power supply and an electric drill nameplate match. Then you have leakage protection.
2.2 drill bit holder should be fitted and properly installed.
2.3 confirmation the drill switch to turn on the lock state, or plug into a power outlet, electric drill rotation will start operating immediately, which may lead to the risk of personal injury.
2.4 When the work area is away from the location of the power extension cord is required, you should use sufficient capacity, install extension cords qualified. Extension cable as pedestrian should be elevated or good measures to prevent cable roll damage.
3, the proper operation of the electric drill
3.1 drill holes in the metal material first used in drilling position red marked oceanic red eye.
3.2 in drilling large perforations, pre-drilled with a small drill bit wear, and then use a large drill bit.
3.3 For a long time in the drilling on the metal cooling measures can be taken to keep the drill bit sharp.
3.4 drilling cuttings non-direct removal by hand, application-specific tools cleared debris.
Maintenance and inspection
4.1 Check drill
Dull or bent drill will motor disorders, overload surface conditions and reduces the operating efficiency Therefore, if such is the case, it should be dealt with immediately replace.
4.2 electric drill body fastening screws checks
Before checking electric drill body mounting screws fastening screw loose, retighten them immediately, otherwise it will lead to an electric drill failure.
4.3 Inspecting the carbon brushes
The carbon brushes on the motor is a consumable degree of wear exceeds the limit, the motor will malfunction, wear carbon brushes should be replaced immediately, in addition to the carbon brushes must often maintain a clean state.
4.4 protection ground wire check
The protective grounding line is an important measure to protect the personal safety class I appliance (metal enclosure) should have a good grounding of its shell should be inspected regularly.
80% of the world's annual consumption, according to the calendar year, industry data, a large number ofpower tools, production and organization exported by Chinese factories (including domestic and foreign firms). According to industry analysts, the remaining 20% of the production of electric tools electric toolsenterprises by foreign (basically professional tools), there are many parts production and export of Chinese enterprises.
Electric drill class "products, power tools in conventional products, but it is the largest demand for electrictools categories of products. About 35% of the total production and sales of power tools. The power tool industry in China is very obvious characteristics of the export-oriented industry, since the start of theindustry-wide annual production of electric tools from the 1990s, 85 to 90 percent for export. "Electric drillproducts foreign trade export volume of China's total exports of electric tools the average share of 37.22%. In 2000, Chinese export products of the electric drill 33,132,700
In 2001, China's export products of the "electric drill" 35,125,200 units
In 2002, Chinese exports "electric drill" 47896200
In 2003, China's export products of the "electric drill" 59,747,800 units.
In 2004, Chinese export products of the electric drill there are 64,810,200
In 2005, China's export electric drill products 63,166,600 units.
"Electric drill class products export decline in 2005, mainly due to the sharp rise in raw material prices,leading to a substantial increase in production costs, and therefore the corporate control of the export volume, causing the export volume declined slightly. Another reason is that the industry product structure adjustment, electric chain saws, the other Chainsaw higher selling price products marketing.
Power tools were born in the world is to start from the drill Product - 1895, Germany Fein developed theworld's first direct current drill this electric drill weight of 14 kg, the casing is made of cast iron, only 4 mmsteel plate drillingholes. Followed by a three-phase power frequency (50Hz) electric drill motor speed could not break through 3000r/min.
In 1914, single-phase series motor driven electric drill the motor speed 10000r/min more.
In 1927, there have been supply frequency of 150 ~ 200Hz IF electric drill, It has the advantages of high speed single-phase series motor, but also has a three-phase-frequency motor structure is simple, reliableadvantages, but for the need to use the IF current electricity, use has been limited.
In the 1960s, there has been nickel-cadmium batteries for power, no power cord, battery electric drill. In the late 1970s, due to lower battery prices, the charging time has been shortened, this electric drill is widelyused in Europe and the United States, and Japan.
The electric drill Initially cast iron shell after the switch to aluminum for the shell. In the 1960s,thermoplastic engineering plastics applications in drill and drill double insulation.
1960s electronic speed electric drill. This Drill using thyristor and other components of electronic circuits,to switch the snap press into different depths to adjust the speed, so that the electric drill when in useaccording to the different objects to be processed (such as the different materials, and borehole diameter,etc.), to select a different speed.
An electric wrench inspection and test and maintenance
1, An electric wrench metal enclosure should be grounded, its shell should be periodic inspection and testcertificate, and within the expiration date.
2, Check electric wrench fuselage mounting screws fastening screw loose, retighten them immediately,otherwise it will lead to the failure of the electric wrench.
3, Check that the hand-held electric wrench on both sides of the handle intact, not cracking damaged securely installed.
Second, the use of electric wrench and Handling Precautions
1, confirm the site connected to the power supply and electric wrench nameplate match. Then you haveleakage protection.
2, According to the nut size chosen to match the sleeve, and proper installation.
3, confirmed before the power switch off state electric wrench, or plug into an electrical outlet, electric wrench rotation will start operating immediately, which may lead to the risk of personal injury.
4, When the work area away from the location of the power extension cord is required, you should usesufficient capacity, install extension cords qualified. Extension cable as pedestrian should be elevated orgood measures to prevent cable roll damage.
5, possible use to find a good reverse torque support rely on point, prevent counterforce wounding.
6, found abnormal motor carbon spark, it should immediately stop work, check processing, andtroubleshooting. In addition the carbon brushes must be kept clean.
7, work or work at heights on a ladder should be prepared to measures falling from height, the ladder shouldhave ground personnel support.
Electric wrench is mainly used in steel structure installation industry, specifically install steel structure high-strength bolts, high strength bolts used to connect steel structure contacts,usually is the way of the bolt group. High-strength bolts can be divided into the SHEAR twohexagonal GB torsion and shear type high strength bolts for M16, M20, M22, M24 four kinds ofnon-national standard M27, M30 two kinds; GB large hexagon high-strength bolts for M16 , M20, M22, M24, M27, M30 several. General have to go for high-strength bolts fastening the early tightend tight, and each step requires strict torque requirements. Torsion and shear type high strength bolts early tight can use impact power wrench or given torque wrench, and final tighttorsional shear wrench must be used; large hexagon high-strength bolts tight early and the finaltightening must set the torque wrench. Electric wrench is from the need for a variety offastening.