The working principle and type of electric drill
How an electric drill works
The motor rotor of the electromagnetic rotary or electromagnetic reciprocating small-capacity motor does the magnetic field cutting work operation, and drives the operating device through the transmission mechanism to drive the gear
The power of the large drill allows the drill to scrape the surface of the object and better penetrate the object.
Type of electric drill
Type of electric drill: Electric drill can be divided into 3 categories: hand electric drill, percussion drill, hammer drill. According to the speed, there is a difference between endless speed change and fixed speed change. These three kinds of electric drill
The price is arranged from low to high, and the functions are also increased, and the selection needs to be combined with their respective scope of application and requirements.
Electric hand drill
The minimum power, the scope of use is limited to drilling wood and as an electric screwdriver, some hand electric drill can be changed into a special tool according to the purpose, and the purpose and model are more.
Percussion drill
The impact mechanism of the electric drill has two kinds: canine and ball. Use the gears on the inner shaft to beat each other to achieve the impact effect, can be used for natural stone or concrete, but the impact is far less than the electric hammer, can be used for ordinary electric drill.
Hammer drill
Can be drilled in a variety of hard materials, the widest range of use. Can produce a strong impact force, accompanied by the effect of drilling. Strength can divide stone and 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 into pig iron castings to protect your eyes.
2. The drill holder should be properly installed.
3. When the drill is in a hot state, pay attention to burning the skin.
4. When drilling a handheld electric drill with Φ12mm or more, a side-handle pistol drill should be used.
5. Standing on a ladder or high work should do a good job of high fall measures, the ladder should be supported by ground personnel.
Precautions should be taken before operation
1. Confirm whether the power supply connected to the site is consistent with the nameplate of the drill. Whether the leakage protector is connected.
2 The drill bit and the gripper should fit and be properly installed
3. Confirm that the switch on the drill is connected to the lock state, otherwise the drill will turn unexpectedly and immediately when the plug is inserted into the power socket, which may lead to the risk of personal injury.
4. If cables need to be extended in a place far from the power supply, use qualified cables with sufficient capacity. Extension cables through pedestrian walkways should be elevated or
Take measures to prevent cables from being damaged by rolling.
The correct operation method of electric drill
1. Drilling holes on metal materials should first be used at the drilled position.
2. To drill a large hole, use a small drill bit and then a large drill bit.
3. If you need to drill holes on the metal for a long time, you can take certain cooling measures to keep the drill sharp.
4. The drilling cuttings generated during drilling are strictly prohibited to be cleaned directly by hand, and special tools are used to remove the cuttings.
Maintenance and inspection
1. Check the drill: The use of slow or curved drill will make the motor overload surface working disorder, and reduce the efficiency of the operation, therefore, if such a situation is found, it should be dealt with immediately
Replace.
2. Check the fastening screw of the electric drill body: check the fastening of the mounting screw of the electric drill body before use. If the screw is found loose, it should be tightened immediately, otherwise it will cause the electric drill to die
Barrier.
3. Check the carbon brush: the carbon brush on the motor is a consumable, and once its wear exceeds the limit, the motor will fail, therefore, the worn carbon brush should be replaced immediately.
In addition, the carbon brush must always be kept clean.
4. Protection grounding wire inspection: Protection grounding wire is an important measure to protect personal safety, so Class I appliances (metal shell) should often check that their shells should be well grounded.
How to change the drill bit of electric drill?
Under normal circumstances, the electric drill and impact drill change the drill bit in the same way, just because the drill chuck on their drill bit is divided into self-tightening drill chuck and hand tight drill chuck, with self-tightening drill chuck in the replacement of the drill bit, we need to hold the drill chuck in one hand, one side to start the reverse switch of the drill, so simple to replace the original drill bit and use the same
Of course, the positive and negative of the switch do not forget to dial back oh, if it is a hand-tight drill chuck, as long as the drill chuck key can be replaced.
>>> Drill drill power, a good drill is very important. The price of drill bits varies depending on the type. We can also first understand the "specifications and classification of electric drill bits", and then refer to the following information to buy according to demand.
