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Nitrogen gas spring technology application on dies

Nitrogen gas spring is an elastic function component. It will be high pressure nitrogen sealing in the determination of the container by a piston rod to nitrogen, external compression, when the external force is removed by high pressure nitrogen expansion to obtain a certain elastic pressure, this part is named as a nitrogen cylinder or a gas spring, referred to as the nitrogen spring.

At present the conventional elastic elements are springs, rubber and air cushion, the elastic element in industrial fields, to solve a variety of elastic energy storage needs. In die mold industry, is the extensive use of the. These years, mold and die manufacturing technology level has great development and improvement, industrial products to mold the demand is also growing, the mold towards precision, complex, high performance, long-life direction to develop quickly.

While the conventional elastic elements have certain shortcomings, can not meet the need of this kind of situation, not the ideal solution to stamping process requirements. This situation tends to affect quality stampings, die structure design becomes more complex, affecting the mold in a press on the replacement of time; at the same time the conventional elastic element holds the mold space is too large, Zhengda, increases the mold manufacturing cost. For example, the rubber spring there are need to preload, to achieve the required for the design of elastic stress, and they play with stroke and pressure is increased obviously increases, the pressure in the constant performance, may lead to parts not forming, the drawing force is not ideal.

For the complicated drawing parts, this contradiction is particularly prominent, sometimes have to increase the process approach to solve this kind of problem. Another spring, rubber initial force is not large, the point on the requirements of initial force of relatively large bending, flanging process, is not ideal. As a result, stamping parts quality is not stable, adjust the mold is time-consuming and laborious. For intensive punch blanking process, such as the use of springs and rubber discharging, often encounter the mold unloading space housed a spring or rubber, consequently need increases the mold space to solve this kind of problem.

Can also be cited examples of this kind. The current stamping design staff can only be used to make up for the deficiency of air cushion. But the use of air cushion of press, mold design, so that the user is not very convenient adjustment; because of pressure fluctuation and throttle loss, air force provided by is not very accurate; it occupies a larger space; need to be equipped with special air compression station, and not all presses are equipped with air cushion. In the use of air cushion, mold design are subject to restrictions on the location of air-cushion eject-rod, mold installation is inconvenient.

Therefore, people develop a new elastic functional components to replace the conventional elastic element, the elastic element has a more perfect performance, can replace conventional elastic elements, complete conventional elastic elements to complete the work, nitrogen spring as elastic tool components also emerge as the times require. It can compensate the insufficiency, simplifying the mold design, mold manufacturing, convenient adjustment; it can be used as an independent component, mounted on the die in use, can be designed into a calandria type spring, as a portion of the mold to participate in the work, the system can easily play the constant pressure and delay action, is a kind of flexible properties of elastic components. Nitrogen gas spring can not only in the mold industry wide application, can also be used in other industrial fields, such as automotive, electronics, instrumentation and other industries. In view of this, the nitrogen spring use is quite extensive, it caters to the requirement of the times, meet the needs of industrial development. Obviously, the development of this technology are now be just unfolding.