What's the difference between a woodworking drill and a metal drill?

Different materials: black bits are generally used for drilling metal, and bits are generally made of high-speed steel. Common metal materials (alloy steel, non-alloy steel, cast iron, cast steel and non-ferrous metals) are used for drilling together with metalworking drills.

Drilling holes in wood materials, combined with the use of woodworking drills, has a large sales volume and low requirements for tool hardness. Tool material is generally high speed steel.

There is a small tip in the center of the drill tip, and the equal angles on both sides are relatively large, or even there is no angle.

2. Bit design structure (tip, blade, groove, handle, etc.). ) is different:

Generally, iron drills are pointed in the middle. This structure is labor-saving, powerful in drilling, wear-resistant and beneficial to feeding.

3. The drill wood is generally trident, high in the middle and low on both sides. Because the wood is soft, it can be drilled faster, and the cutting edges on both sides can also make the drilled holes flush and beautiful, which is also called thin plate drilling.

The working principle of electric drill is that the motor rotor of electromagnetic rotating or electromagnetic reciprocating small-capacity motor does magnetic field cutting and work operation, and the working device is driven by the transmission mechanism to drive the gear to increase the power of the drill bit, so that the drill bit can better scrape the surface of the object and penetrate the object.

Electric drills can be divided into three categories: hand drills, impact drills and hammer drills.

1. Hand electric drill: the power is the smallest, and the use range is limited to wood drills and electric screwdrivers. Some hand drills can be changed into special tools according to their uses, with more uses and models.

2. Impact drill: The impact mechanism of impact drill has two types: dog tooth type and ball tooth type.

The ball impact drilling rig consists of a moving disk, a fixed disk and steel balls. The turntable is connected with the spindle through threads, and there are 12 steel balls on the turntable;

The fixed disk is fixed on the shell with pins and has four steel balls. Under the thrust, the 12 steel ball rolls along the four steel balls, which makes the cemented carbide drill produce rotary impact motion and can drill holes in brittle materials such as bricks, blocks and concrete.

The pin is separated, so that the fixed disk and the driven disk rotate together without impact, and it can be used as an ordinary electric drill.

3. Hammer drill (electric hammer): It can drill holes on a variety of hard materials and has the widest application range.

The prices of these three kinds of electric drills are arranged from low to high, and their functions have also increased. When choosing them, it is necessary to combine their respective application scope and requirements.

The difference between hand drill, impact drill, hammer drill and electric pick

The hand electric drill only relies on the motor to drive the transmission gear to increase the rotation of the drill bit, so that the drill bit can scrape through metal, wood and other substances.

There are two ways for impact drill to work: adjusting knob, adjustable drill and impact drill. The impact drill uses the gears on the inner shaft to jump each other to achieve the impact effect, and the impact force is far less than that of the electric hammer. You can also drill reinforced concrete, but the effect is not good.

Hammer drill (electric hammer) is different. It uses the motor at the bottom to drive two sets of gear structures. One set drives it to drill, and the other drives the piston, just like the hydraulic stroke of the engine, which produces a strong impact force to match the drilling effect. Strength can turn stone into gold.

The electric pickaxe makes the motor drive the swing hammer to run in the form of bouncing, so that the pickaxe has the effect of digging the ground. Hydraulic pump pickaxe uses the gas pressure transmitted by air compressor to drive the pump hammer in electric pickaxe to rebound, thus producing the effect of chisel hitting the ground, but electric pickaxe is only a chisel, and its pickaxe does not rotate.

In short, electric drills can only drill holes, and impact drills can also have a slight hammering effect. Hammer drill can drill, and the level of hammer is higher, while electric pick can only hammer but not drill.

Woodworking is a craft, a unique technology and a common technology in architecture. It is one of the three traditional industries in China (namely, carpentry, wood industry and carpentry).

It is said that in ancient times, "carpenters" were needed to build houses to eliminate disasters!

When the evil spirits were suppressed, the carpenter took out his unique tools, stood on the roof and shouted words of good luck to ensure future peace and prosperity! In today's society, "woodworking" has a wide range of professional applications.

For example, in the field of housing construction, shipbuilding, landscaping construction, and now the most common decoration field.

On 20 17,10127 October, the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out for reference. Woodworking and joinery are in the list of Class 2B carcinogens.

Woodworking is a kind of work to complete various wooden projects for the owners in the process of house decoration, and its labor cost accounts for 40-60% of the labor cost of the whole home improvement project.

The specific construction projects of carpentry:

Ceiling project (gypsum ceiling), wood partition project (light steel keel partition), customized furniture project, door cover, window cover project, living room background wall project.

The porch project. The quality of woodworking technology is directly related to the whole construction effect. However, with the improvement of building materials technology, many woodworking projects have been directly customized by manufacturers, which greatly reduces the decoration cost and greatly improves the quality and sensory effect of customized products.

Conventional woodworking customized products in the market include: finished suit doors, customized wardrobes, customized bookcases, customized cabinets, customized sliding doors and so on. When it comes to woodworking, you have to mention "Luban", which is said to be the originator of woodworking.

Master Lu Ban is a famous craftsman. Under the guidance of his experience, China became a country with relatively developed timber industry at that time.

The wooden floor is naturally created by Lu Ban, and his spell records:

Fuyi, natural landscape, town house building, resist all disasters, house auspicious, home prosperous and healthy.

Interpretation: Yi Fu, the first disciple of Luban, said that natural landscape is a good feng shui implication of fairyland, referring to the land god (god) in natural landscape fairyland. The natural landscape also implies that Mount Tai can be used to build houses and can resist all disasters, storms, lightning, ghosts and gods, and land gods. The floor of the house is resistant to disaster. There is no disaster in the family, and conforming to nature brings good luck and prosperity to the family.

Electric drill is a kind of drilling machine powered by electricity. It is a conventional product in power tools and the most demanding power tool product. Annual production and sales account for 35% of the national power tools.

The main specifications of electric drills are 4, 6, 8, 10, 13, 16, 19, 23, 32, 38, 49mm, etc. This figure refers to the maximum diameter of drilling holes in steel with tensile strength of 390N/mm2. For non-ferrous metals, plastics and other materials, the maximum drilling diameter can be 30 ~ 50% larger than the original specification.

The birth of the world's electric tools began with the electric drill product-1895. Germany developed the world's first DC drill, which weighed 14 kg, and its shell was cast iron, and only 4 mm holes could be drilled in the steel plate. Then a three-phase power frequency (50Hz) electric drill appeared, but the motor speed failed to exceed 3000r/min.

In 19 14, an electric drill driven by single-phase series motor appeared, and the motor speed reached 10000r/min.

1927, an intermediate frequency electric drill with power supply frequency of 150 ~ 200 Hz appeared. It has the advantages of high speed of single-phase series motor and simple and reliable structure of three-phase power frequency motor, but its use is limited because it needs intermediate frequency current to supply power.

In the 1960s, there appeared a battery-type electric drill with nickel-cadmium battery as the power supply and no power cord. By the middle and late 1970s, this kind of electric drill was widely used in Europe, America and Japan because of its lower battery price and shorter charging time.

The electric drill was originally made of cast iron, and later it was made of aluminum alloy. In 1960s, thermoplastic engineering plastics were applied to electric drills, realizing double insulation of electric drills.

In the 1960 s, there were electronic speed-regulating electric drills. This kind of electric drill uses thyristor and other components to form an electronic circuit, and the rotation speed is adjusted according to the depth of the switch button, so that the electric drill can choose different rotation speeds according to different processing objects (such as different materials and different drilling diameters). ) when using it.

Baidu Encyclopedia _ Electric Drill