Spring measurement function and reset function

Reset function
The spring deforms under the action of external force, and the spring can recover after the external force is removed. Many tools and equipment use the spring to reset. For example, the hinges of many building doors are equipped with reset springs, and the doors will reset automatically after people enter and leave. People also make use of this function to make automatic umbrella, automatic pencil and other supplies, very convenient. In addition, all kinds of buttons and buttons also need a return spring.

 

Driving function
Mechanical clocks and clocks, spring toys are driven by tightening the spring. When the spring is tightened, the spring will produce bending deformation and store a certain elastic potential energy. After release, the elastic potential energy is converted into kinetic energy, which is driven by the transmission device. Toy guns and starting guns and military guns are also used to work with one of the properties of springs.

Spring manufacturing equipment

As an important component in the industrial system, spring has a large amount of use, and a variety of types, so the production of spring from the original manual production, gradually to automation. Ninety years ago in China, there were only a few specialized spring machinery and equipment in the spring industry.

 

With the increasing spring market, more and more professional spring equipment enterprises have entered China. For example, Taiwan’s northeast spring machinery (EN qiaoding) and Guanghong (KHm) have gradually occupied the mainstream spring production market. Is the use of proprietary mechanical mechanisms, convenient and rapid production of various springs, special-shaped elastic components.

Guanghong’s equipment is a high-speed equipment for producing compression spring and tension spring. There are also many professional spring equipment manufacturers abroad, such as WAFIOS, mec (now Orii & MEC), etc. Domestic production of large spring CNC hot coiler is still blank. Although spring industry is a small industry in the whole manufacturing industry, its role can not be underestimated. The expansion of spring production and marketing scale, the increase of varieties and the improvement of quality level are also the needs of mechanical equipment upgrading and the improvement of supporting host performance.

 

Therefore, for the development of the whole country’s industry, spring products have played an important role. Since the reform and opening up, with the economic globalization and the establishment of China’s status as a manufacturing power, the demand for springs has increased sharply. In addition, the investment in spring production is not high, the technical threshold is low, and the investment recovery is fast. Since the 1980s, the number of spring production enterprises has increased rapidly.

 

By the end of 2010, there were 724 Enterprises above Designated Size in spring manufacturing industry in China, with more than 100000 employees. In 2010, the sales revenue exceeded 30 billion yuan and the total profit exceeded 1.6 billion yuan. As a highly competitive product, the domestic enterprises of low-end products have a cost advantage and a certain competitiveness in price in the market. Foreign capital and joint venture technology have advantages in high-end products.

 

For example, elastic stents for the treatment of cardiovascular diseases are almost monopolized by foreign medical giants, and domestic enterprises have nothing to do. Automobile spring is the most heated field for domestic and foreign enterprises to compete in the market. Spring industry has gradually entered into the industry chain competition from the price war and service competition in the past, and the industrial chain is completed by means of standardization.

 

Although the industry’s standard system is relatively perfect, due to the early formulation, the market demand has a considerable distance, especially compared with Japan, Europe, the United States and other developed countries, the current national standards and industry standards are still low, resulting in domestic spring products in the international market competitiveness is not strong, therefore, as soon as possible to introduce new industry standards in line with international standards is the industry needs The first problem to be solved.

 

During the 12th Five Year Plan period, China’s automobile, railway, instrumentation and other industries will maintain rapid and stable development thanks to the relevant national policy stimulus and the revitalization plan of related industries. In addition, some emerging industries, such as conventional weapons, nuclear power and aircraft manufacturing, can not lack the participation of spring. With China’s growing national strength and increasing investment in national defense science and technology, this is also an important aspect of business opportunities in the spring industry.

 

Under the background of good external environment and stable growth of downstream demand, China’s spring industry will maintain rapid and stable development. It is estimated that by the end of the 12th Five Year Plan, that is, in 2015, the sales volume of spring industry in China is expected to reach 60 billion yuan.

Torsion spring is often used in balancing mechanism of machinery

The torsion spring (torsion spring) uses the principle of lever to twist or rotate the elastic material with soft material and high toughness, so that it has great mechanical energy.

 

It is a spring that bears torsion deformation, and its working part is also closely surrounded or separated around. The end structure of torsion spring is processed into various shapes of torsion arm. The deformation of torsion bar from single torsion to double torsion and even all kinds of torsion bar can be shaped according to design.

 

Torsion spring is often used in balancing mechanism of machinery, and is widely used in automobile, machine tool, electrical appliance and other industrial production.

Calculation formula of spring force

F = KX, f is elastic force, K is stiffness coefficient (or stubborn coefficient), X is the length of spring stretching (or pressing short). Example 1: when a spring with a stiffness coefficient of 100N / M is pulled with 5N force, the spring will be elongated by 5cm. Example 2: when a spring is subjected to a tensile force of 10N, its total length is 7cm, and when it is subjected to a tensile force of 20n, its total length is 9cm?

The Bronze Age of metal spring

Like most other basic mechanisms, metal springs have existed for a long time in the bronze age. Even metal, wood is used as a structural component of flexible bows and military catapults. In the Renaissance, precise clocks and clocks made precision springs inevitable for the first time.

 

The fourteenth century saw the development of revolutionary astronomical navigation with precise clocks. The world’s exploration and conquest of European colonial powers continued to provide power for the watchmaker “science and art.”. Another area of firearms is the development of springs. With the advent of the industrial revolution in the 18th century, it was proposed that the spring should be large, accurate and cheap. Since Clockmakers’ springs are often made by hand, large-scale production of springs is made of piano steel wire or similar materials.

 

Advanced manufacturing methods make the spring everywhere. The computer control line and sheet bending machine allow the processing of custom springs, which is obviously a special machine. Spring is just an accumulator, it has the function of storing energy, but it can’t release energy slowly. To realize this function, we should rely on “Spring + large transmission ratio mechanism”, which is common in mechanical watch. Spring has been used for a long time.

 

Ancient bow and crossbow are two kinds of spring in broad sense. Strictly speaking, the inventor of spring should be Robert Hooke, a British scientist. Although the spiral compression spring had appeared and was widely used at that time, Hooke put forward the “Hooke’s law” – the elongation of the spring is proportional to the magnitude of the force it is subjected to. According to this principle, in 1776, the spring scale using the spiral compression spring was invented. Soon, the spring made according to this principle was also invented by hooker himself.

 

The spring that conforms to Hooke’s law is the spring in the real sense. Disc spring is invented by French Belleville. It is a washer spring with truncated cone section made of metal sheet or forging blank. After the appearance of modern industry, in addition to the disc spring, new springs such as gas spring, rubber spring, scroll spring, die spring, stainless steel spring, air spring, memory alloy spring and so on appeared