Butterfly spring, Xufeng hardware (certified), spring is provided by Xufeng Dongguan City Hardware Products Factory. Xufeng Dongguan City Hardware Products Factory (www.dglijing168.com) Guangdong Dongguan, spring leader, over the years, the company is implementing scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Xufeng Hardware leadership with the staff warmly welcome all inquiries negotiations to create Xufeng metal products a better future. Xufeng Dongguan City Hardware Products Factory is a professional production enterprise pressure spring metal spring, lathe parts and stamping parts, the factory has advanced technology and equipment, modern workshops and professional personnel, products sold around the world. Spring classes thematic light spring is an ideal physical model, in the "Exam" involved in its knowledge points are: ① deformation and elastic spring steel, Hooke's law (which requires knowledge of grade B); ② bomb potential ( A level requirements), spring oscillator and other spring will not change suddenly, it changes to go through a process, which is deformed by changing the spring to gradually carry out the decision. So, you know at a certain instant action (such as collisions) stretch will remain unchanged. Stretch is a variable force, while seeking impulses and elastic stretch of the work done, not directly with the impulse type and function definitions, generally the amount of kinetic energy theorem and the theorem calculations. The spring force of the deformation is proportional to a change in spring, so it causes the acceleration of the object, velocity, momentum, kinetic energy changes are not simply a monotonic relationship, tend to have a critical value. If the spring is used as an object within the system, the spring will not do within the system object does not affect the system's acting mechanical energy of the spring is very much useful Oh! Xufeng Dongguan City Hardware Products Factory is a professional production of metal springs, lathe parts and stamping parts of the enterprise, the factory has advanced technology and equipment butterfly springs, modern plant and professionals, products sold around the world. Elongated flat spiral spring is made of materials, such as cross-sectional plane around the helical springs, flat spiral spring production is relatively simple, its rigidity is small, typically work under static load. Since the number of windings can be much deformation angle is large, more energy can be stored in a smaller volume. Its sectional shape may be rectangular material (steel) or circular (steel). Flat spiral spring contact according to the adjacent ring is divided into two categories: non-contact and contact type. We are designing a suitable home use fitness rowing when its damping issues were discussed multi-program comparison, the outer ends of the hinge finally adopted a non-contact type flat spiral spring as a junior after its use to achieve the desired damping effect. (You can think about oh)! ! !