In mechanical and electrical products, there are many kinds of springs, mainly the following types.

(1) Matching springs and springs for automobiles, motorcycles, diesel engines and gasoline engines. This kind of spring has valve spring, suspension spring, shock absorption spring and clutch spring, etc., the dosage is large, accounting for about 50% of the spring production. At the same time, the technical level is also high, it can be said that the technical level of these springs is representative, they are mainly to the direction of high fatigue life and high relaxation resistance, so as to reduce the quality.

(2) large spring and plate spring based on railway locomotive vehicles, heavy trucks and construction machinery, these springs are mainly formed by hot coil, which is an important aspect of spring manufacturing. With the development of high-speed railway, the upgrade of vehicle shock absorption system, as a vehicle suspension thermal forming spring technology has been greatly improved, this kind of spring mainly to the direction of high strength and high precision development to stabilize product quality.

(3) electronic and electrical spring based on instruments, typical products such as motor brush spring, switch spring, camera and camera spring, as well as computer accessories spring, instrument accessories spring. This kind of spring in the spring, the opposite spring accounted for a larger proportion of different products on the material and technical requirements are larger. This kind of spring mainly toward both high strength and miniaturization direction development.

(4) hardware springs based on daily machinery and electrical appliances, such as mattresses, sofas, door hinges, toys, lighters, etc., this kind of spring demand is large, but the technical content is not high, to improve the development opportunities for small spring enterprises, this kind of spring is mainly to miniaturization direction.

(5) to meet the special needs of special springs, such as textile machinery swing spring, requiring high anti-relaxation performance; Ladle water ski spring, requiring high heat resistance; Suspension spring with mine vibrating screen, not only requires high fatigue performance, but also requires high corrosion resistance, so the rubber metal composite spring is used: in order to meet the comfort of the vehicle, the air spring is used.

For the current emergence of the opposite section of the suspension spring and valve spring, lightweight, save space, improve comfort and improve the spring stress distribution consideration, than the round section spring is more reasonable, but this kind of spring material price is high, spring manufacturing process is complex, making the spring cost is higher than the round section spring. Therefore, there is no sign that the cross-sectional spring replaces the circular spring.