The working principle and type of electric drill
How the electric drill works
Electromagnetic rotary or electromagnetic reciprocating small capacity motor rotor to do magnetic field cutting work, through the transmission mechanism to drive the operation device, drive gear to increase the power of the drill, so that the drill scraping object surface, better hole through the object.
Type of electric drill
Electric drill type: electric drill can be divided into 3 categories: hand electric drill, impact drill, hammer drill. According to the speed, there are infinitely variable speed and fixed speed difference. These 3 kinds of electric drill price from low to high arrangement, function also increases accordingly, choose to need to combine respective applicable scope and requirements.
Hand electric drill
Power minimum, the scope of use is limited to drilling wood and when an electric screwdriver, part of the hand electric drill can be changed according to the use of special tools, uses and models more.
Impact drill
The impact mechanism of electric drill has two kinds of canine type and ball type. Using the gear on the inner shaft to beat each other to achieve impact effect, can be used for natural stone or concrete, but the impact force is far less than the electric hammer, can be used for ordinary electric drill.
Hammer drill
Can drill holes on a variety of hard materials, the widest range of use. Creates a powerful impact force, accompanied by a drill effect. Strength divides stone into gold.
Electric drill use method detailed explanation
Personal protection when using electric drill
1. Wear a protective mask when working face up. Wear protective glasses when drilling pig iron castings to protect your eyes.
2. Drill holder should be properly installed.
3. When working, the drill is in a hot state, so it should be careful to burn the skin.
4. When drilling a hand-held electric drill with a diameter of more than 12mm, use a handgun drill with a side handle.
5. Fall measures should be taken when working on a ladder or at a high place. The ladder should be supported by ground personnel.
Precautions should be paid before operation
1. Check whether the power supply connected onsite matches the nameplate of the electric drill. Whether there is leakage protection device.
Drill bit and gripper should be fit and properly installed
3. Make sure that the switch on the electric drill is switched on. Otherwise, the electric drill will turn unexpectedly immediately when the plug is inserted into the power socket, which may cause personal injury.
4. If you need to extend cables in a place far from the power supply, install qualified extension cables with sufficient capacity. If the cable extends through the pedestrian corridor, it should be elevated or take measures to prevent the cable from being crushed and damaged.
Correct operation of electric drill
1. Drilling holes on metal materials should be first used in the position of being drilled to hit the ocean.
2. When drilling larger holes, drill with a small drill bit in advance, and then drill with a large drill bit.
3. If it is necessary to drill on metal for a long time, cooling measures can be taken to keep the drill sharp.
4. Drill cuttings produced during drilling are strictly prohibited to be cleaned directly by hand, and special tools should be used to clean the cuttings.
Maintenance and inspection
1. Check the drill bit: the use of dull or bent drill bit will make the overload surface of the motor abnormal and reduce the working efficiency. Therefore, if such situation is found, it should be replaced immediately.
2. Check the fastening screws of the electric drill body: check the fastening condition of the mounting screws of the electric drill body before use. If the screws are loose, tighten them immediately, otherwise it will lead to the failure of the electric drill.
3. Check the carbon brush: the carbon brush on the motor is a consumable. Once the wear exceeds the limit, the motor will fail.
4. Check the protection grounding cable: The protection grounding cable is an important measure to protect personal safety, so class ⅰ appliance (metal shell) should be regularly checked that the shell should have good grounding.
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How does an electric drill change a bit?
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Normally, electric drill and impact drill bit change is the same way, just because they are a bit drill chuck points on self-tightening drill chuck and purchase often-expensive type drill chuck, with self-tightening drill chuck type electric drill in bit change, we need to control drill chuck, side to start the reverse switch electric drill, so simple to replace the original bit down, Use the same method to put the drill on, of course, do not forget to switch back oh, if it is a hand-held drill collet, as long as the drill collet key open it can be replaced.