When did nuts appear in China and what are nuts?

1 When did the screws start to come in.

1945-1967: In the embryonic period of the industry, Chunyu was the first to establish screws and nuts in China.

Factory. l968-1983: Production technology.

Formal forming, Chunyu and Samsung Hardware self-made a variety of fast screws, nuts and peripheral equipment, **domestic, so that the productivity of the tiger wings. 1979-1983: Expansion period, Sinosteel, Taiwan.

Expansion of production at all stages, high-quality and low-cost rods and wires, a large number of imported raw materials, increase the competitiveness of the industry. In 1998, Jinhe went to Chinese mainland to produce nuts, Samsung Hardware produced screws and produced aerospace screws with Textron Alliance. The history of mechanical development and the history of thread development.

2Which country and in which era was the screw cap invented?

Nowadays, many things have to be screwed.

Fastened together. If you look around your home, you can see everything you see—from furniture to food processors—all connected together with screws. Spirals were invented more than 2,000 years ago, but they have been used to hold things in place for less than 500 years.

The first person to describe spirals was the Greek scientist Archimedes (c. 287 BC – 212 BC). Archimedes spiral.

It is a huge spiral in a wooden cylinder that is used to lift water from one level to another to irrigate the fields.

Its real inventor may not have been Archimedes himself. Maybe he's just describing something that already exists. Ancient Egypt, perhaps.

The skilled craftsmen designed it to be used for irrigation on both sides of the Yiluo River.

Archimedes' spiral was used throughout ancient societies to carry water, and no one considered changing it to a fixture.

Right: Archimedes spirals are widely used to lift water. For example, the ancient Romans used it to drain water from mines.

In the Middle Ages, carpenters used wooden nails or metal nails to connect furniture to wooden buildings. In the 16th century, nail makers began to produce belt spirals.

nails that are able to connect things more firmly. That's a small step from one nail to a screw. At the end of the 18th century, screws were already quite popular as fixing parts, because by then a cheap method of production had been found.

Screwdriver. Rotary chisel) appeared in London around 1780. Carpenters have found that tightening screws with a screwdriver is better than striking them with a hammer, especially when it comes to fine-grained screws.

Although it is only a small fastener, the screw has not stopped improving. As early as the 3rd century AD, the Greek mathematician Archimedes invented the thread, but it was not until the 15th century that the first screw appeared, and it is not known who its inventor was. In 1550 there were wooden screws, and it was not until 1774 that the screwdriver was invented.

In 1936, Henri M. Philips patented a screw for a cross-groove nail head, marking a major advance in the field of screws. Unlike traditional slotted nail head screws, the edge of the cross slot head screw head screw. This design allows the screwdriver to be automatically centered and not easy to slip, so it is very popular.

It feels good to reduce hunger.

Question 1: What is a nut? Nuts are also called nuts, and there are many types of nuts, including hexagonal nuts, round nuts, square nuts and so on.

Some standards for nuts are still relatively clear. Some specifications and size standards, material requirements standards, electroplating standards, etc. are relatively clear. Different types of nuts also have different standards, so there is a detailed introduction to the specifications and standards of nuts.

Question 2: What is the difference between a nut and a nut The nut is usually hexagonal and holds the screw sail strap at the other end.

The nut is usually rounded and at the same end as the screw.

Just look at the desks and chairs with screws.

Question 3: What is a nut snake?

Question 4: What three-dimensional pattern does the nut belong to There are many common nut shapes, generally hexagonal nuts, square nuts, round nuts, tapered nuts, etc., so only the general hexagonal nut shape is a hexagonal prism whose height is less than the length of the opposite side.

Question 5: What is the main material of the nut? Generally, there are two kinds of it, 1Carbon steel, 2Stainless steel, it seems that there is also copper, I hope it can help you.

Question 6: What kind of nut is this, and what is it used for (screws) It is a silencer, which is used on pneumatic components.

Question 7: What is the professional name of this nut? **There is a sale, thank you! This is not a nut, it is a hollow rivet.

Question 8: What does nut p=2 mean What does nut p=2 mean, fastener consultant Yu Wenlong thinks that nut p=2 means that the nut thread pitch is 2mm. Yu Wenlong, a fastener consultant, believes that it is best to check the relevant information by yourself, and it is always fake on the Internet.

The light ones are unqualified in terms of product quality, and the heavy ones will be fined.

Question 9: What does the nut mean by the other letters? and the bolts matching.

Represents the level and material. It is made of low-carbon alloy steel or medium-carbon steel and heat-treated (quenched and tempered), commonly known as high-strength bolts. The so-called strength grade is the shear stress level for.

Question 10: What kind of equipment is used to process standard screws and nuts? It is to make the material through multiple processes such as "cutting", "cold pier punching", "mechanism automatic tapping" and "polishing", and only need to send the bar material into the machine.

The nut is the nut, which is screwed together with the bolt or screw rod to play the role of fastening parts, and all the components that must be used in manufacturing machinery are divided into carbon steel, stainless steel, non-ferrous metals (such as copper) and other major types according to different materials.

The most commonly used nut is made of nylon material, which is mostly used in automobiles, lathes and other parts where the screw is bare and often in contact with people, the purpose is to prevent the bare screw from being scratched when moving.

The working principle of the nut: the friction between the nut and the bolt is used for self-locking, but the reliability of this self-locking will be reduced in dynamic loads. In some important and prudent occasions, we will take some anti-loosening measures in a fiber shed to ensure the reliability of nut locking, among which locking nuts are one of the anti-loosening measures.