/kloc-during the industrial revolution in the 0/8th century, large, accurate and cheap springs were put forward. In view of the clockmaker's clockwork is mostly made by hand, the mass production material of clockwork is piano steel wire or similar material. Advanced manufacturing methods make today's springs everywhere. Computer control line and sheet bending machine allow customized spring processing, 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 achieve this function, it should be realized by "spring+large transmission ratio mechanism", which is more common in mechanical watches. Springs have been used for a long time, and ancient bow and crossbow is two kinds of springs in a broad sense. Strictly speaking, the inventor of the spring should be British scientist robert hooke. Although the helical compression spring had appeared and been widely used at that time, Hooke put forward Hooke's law-the elongation of the spring is proportional to the force. According to this principle, a spring scale using spiral compression spring appeared in 1776. Soon, the clockwork specially made for clocks and watches based on this principle was also invented by Hooke himself. The spring that conforms to Hooke's law is the real spring. The belleville spring was invented by belleville, a Frenchman. It is a washer spring with truncated cone section, which is made of metal sheet or forging blank. After the emergence of modern industry, in addition to disc springs, new types of springs have appeared, such as gas springs, rubber springs, scroll springs, die springs, stainless steel springs, air springs and memory alloy springs. For the spring industry, the supply of low-grade ordinary springs exceeds demand for a long time, and the supply of high-grade products (high strength, high stress, different parts and special materials) exceeds demand. The output of China spring industry is saturated. According to experts' statistics, the annual output of springs in China has reached 4 billion pieces, and there are more than 2 1 category and 1 600 varieties of various spring products, mainly including valve springs, suspension springs, diaphragm springs, damping springs, hydraulic springs, oil pump springs, disc springs, high-temperature springs, clamp springs, tension springs and torsion springs.
The spring industry developed rapidly during the Eighth Five-Year Plan and the Ninth Five-Year Plan, especially in Shanghai, Tianjin, Guangzhou, Shandong, Changchun and Chongqing, which was better than other industries in general. Cars, motorcycles, mopeds, internal combustion engines, electric power, instruments, etc. It will also develop, and the development of these industries will drive the development of the spring industry.
Facing the macroeconomic situation, the long-standing contradiction of low product quality, loose organizational structure and weak development ability in the industry is further highlighted. Digging from a deeper level is mainly the problem of market, system and mechanism.
Industry insight researchers believe that with the transformation of national economy from seller's market to buyer's market, some deep-seated contradictions, especially structural contradictions accumulated over the years, are increasingly prominent. At present, the unreasonable industrial structure is as follows: overcapacity in some industries and unreasonable product structure; The technical structure is unreasonable, and the equipment level of major industries is low; The enterprise organization is small and scattered, lacking competitive strength and advantages, and the regional structure is similar, which fails to reflect comparative advantages and cooperation benefits. Although the spring industry is a small industry in the whole manufacturing industry, its role cannot be underestimated. The country's industrial manufacturing industry and automobile industry should be accelerated, and the spring industry, as one of the basic components, needs an ultra-early development to adapt to the rapid development of the whole country's industry. In addition, the expansion of the scale and variety of spring products and the improvement of the quality level are also the needs of upgrading mechanical equipment and improving the performance of supporting hosts. Therefore, spring products play an important role in the industrial development of the whole country. Daily necessities industry and hardware industry, including lighters, toys, locks, door hinges, fitness equipment, mattresses, sofas, etc. The demand for springs is the largest in quantity, tens of billions, with low technical requirements and very low price. Generally, they are produced by small spring factories scattered all over the country, which have unique advantages in cost and it is difficult for large spring factories to compete with them. Therefore, new spring enterprises are born from time to time. In the future, the market demand will increase by 7%~ 10% every year. After China's entry into WTO, the export volume of daily-use hardware products increased significantly, which led to the demand for springs. However, due to the influence of international market demand and trade barriers, the international market has its uncertain side.