When it comes to power tools, people think of electric saws, Impact Drill 13MM, cutting machines, etc., but they also feel that they are far away from us ordinary people. These power tools should be used by professional engineers. Even if they are purchased, they don’t need much. They were left unused for the second time, and what awaited them was forgotten in the corner, unusable for many years, and finally discarded.
But when we see in some videos or movies, those tools in foreign families will be envious, all kinds of tools are readily available, the key is that they also like to spend time to do all kinds of things.
With the development of the times and the change of concepts, we now no matter adults or children are beginning to like hand-made and DIY, various electric tools are slowly becoming some indispensable items in family life.
An electric tool is a small tool that uses a small motor or electromagnet as the power and drives the working head to work through a transmission device. It has the characteristics of being easy to carry, more powerful, and simple to use. It is widely used in all walks of life in society. Our production and life have brought great convenience.
There are many types of power tools. Among them, electric drills, electric hammers, and percussion drills are the power tools we use frequently. These products are powerful. If you want to make a hole, whether it is concrete, the ground or the masonry wall, it will not withstand a blow in front of them. .
Sometimes there is such a question. In ancient times, there was no electricity, and sometimes it was necessary to make holes in the wood. So how did you make the holes?
In China, the wise and intelligent ancient people used two wooden sticks. The head of the stick was fitted with an iron cone. A rope was made into a drill. By pulling the wooden stick and the rope driving the iron cone to rotate, the hole could be drilled. This kind of drill can only make holes in wood, and it is not known whether it was developed by the principle of drilling wood to make fire.
It was not until the end of the 19th century that the first electric drill was made in Germany. The shell was made of iron. It was powered by direct current. It could drill holes in the iron plate, but the weight also reached 14 kg.
Electric tools driven by electric motors appeared in 1914.
After humans first landed on the moon in 1971, they used a cordless drill to drill holes and samples on the moon for the first time.
With the development of battery technology, especially the breakthrough of lithium battery technology, high-power electric tools have begun to use wireless batteries, and wired electric tools will gradually be replaced by wireless electric tools.
Percussion drills, electric drills, and electric hammers are all used to make holes. What is the difference between them, and what is the working principle?
Electric drill: It is a drilling tool that uses electricity as power. It is the most used product among electric tools. It can work in a small space. The switch can control the forward and reverse rotation of the chuck. The electric drill only has rotational energy, that is, it can only The drill can't impact, so it can only drill holes on objects with low density or low hardness, such as wood, plastic or some metals. It can also be used as a screwdriver with a low speed. Many practical functions have been developed by people.
The working principle of the electric drill is that the small-capacity motor drives the connecting rod to drive, and the connecting rod drives the gear to increase the power of the drill bit, so that the drill bit scrapes the surface of the object and finally penetrates the object, that is, the motor drives the transmission gear to increase the rotation force of the drill bit, so that the drill bit Easily drill through objects.
The drill chuck is an important part of the electric drill. The three clamping jaws can easily hold the drill bits of different specifications. The threads on the jaws mesh with the threads on the jacket. The jaws can be made by rotating the jacket. Stretch along the inclined plane, open or clamp the drill bit, clamp the drill bit and clamp the drill bit in the middle of the clamping jaws before drilling, so as to prevent the drill bit from falling off during the drilling process.
Impact drill: It relies on the rotation and impact of the drill bit to work. Its impact mode and rotation mode can be switched. The impact drill uses gears on the inner shaft to generate impact, so the impact is not very large. It is mainly used for Drill holes in wood, bricks, and concrete, but the effect is not very good.
The working principle of the percussion drill is that when the percussion drill is rotary drilling, it is the same as the electric drill. The motor drives the gear transmission, the gear drives the connecting rod, and drives the drill bit to rotate and drill. The upward jump drives the compression piston to reciprocate in the impact piston cylinder, and the compressed gas pushes the impact piston cylinder hammer to hit the end of the drill bit with a higher impact force, making the bit impact forward
Cordless Brushless Hammer Drill: It is an electric tool that can both rotate and impact. Through the reciprocating movement of the piston, compressed air in the cylinder impacts the end of the drill bit to make holes. The impact process of the electric hammer does not require much force, and the impact force will be greater than the drill bit. There are many, but the vibration is relatively large. It is mainly used for drilling holes in concrete and natural stones. It can also be used for demolition of floors and walls, but it cannot be used for drilling holes in metal.
The working principle of the electric hammer is that when the transmission mechanism drives the drill bit to rotate, there is also a reciprocating hammering movement in a direction perpendicular to the rotor. The motor drives the gear or chain, and the gear and chain drive the eccentric shaft. The eccentric shaft is driven by the connecting rod. , The piston in the cylinder reciprocates, and the hammer constantly impacts. The transmission mechanism drives the piston to reciprocate and compress air in the cylinder. The air pressure in the cylinder changes periodically, which drives the hammer in the cylinder to reciprocate and strike the top of the bit. This is like taking a hammer to go. It's the same as knocking a nail.
As people use power tools as common equipment in production and life, the application range of tools such as electric drills, electric hammers, and impact drills continues to expand. Power tools that can improve work efficiency will surely play an important role in economic development. In recent years, power tools It is also included in the category of advanced equipment manufacturing. With the development of electronic technology, motor technology, and battery technology, new developments are bound to usher in.
Post time: Dec-17-2021