When choosing the application of nitrogen spring in mold design, the problem encountered is that nitrogen spring technology should be considered when selecting nitrogen spring in mold design. It has its own characteristics and a certain range of use, and correctly restricts the scope of application of this technology. , In order to give full play to its role, so as to obtain the desired effect. Today, Nailite will take you to understand what factors should be considered in the selection of nitrogen gas springs.
1. Selection of the characteristic curve of nitrogen gas spring
For various stamping processes, there are different process requirements. When selecting the nitrogen spring technology, it must be adapted to the process requirements. But from an economic point of view, there is a relatively large impact, because the price of nitrogen springs produced by various factories is related to their performance. For the same elastic pressure, a nitrogen gas spring with a constant force is more expensive than a gas spring with an inconstant force. The longer the stroke of the gas spring of the same specification, the more expensive it is. Therefore, it is necessary to select different nitrogen spring characteristic curves according to different process requirements, so as to obtain the best performance price and the best economic benefits.
In order to ensure the smooth operation of the nitrogen gas spring, and for safety reasons, to avoid accidents, the designer should consider increasing the safety stroke when selecting the nitrogen gas spring in addition to the trust in the brand (generally the safety stroke should be the stroke of the piston cylinder 10%), so as to ensure the normal operation of nitrogen for a long time.
2. Arrangement of focus points
In the mold design, the transmission of elastic pressure should be balanced, and the layout of the focus point needs to solve a balance problem. There are often more than one choice of nitrogen springs. From the perspective of the stamping process, it is also necessary to consider the issue of pressure balance to facilitate Improve the service life of the mold and ensure the quality of stamping parts.
3. The stability of the nitrogen gas spring
Nitrogen gas springs need considerable stability and reliability no matter when they are installed or made. Nitrogen gas springs need considerable stability and reliability no matter when they are installed or when they are working. It is precisely because of its large elastic force. A nitrogen gas spring must release hundreds of kilograms or even several tons of force in a small volume, and this process is repeated continuously. Therefore, it is very important to maintain the stability of its work. When installing and tightening, especially the nitrogen gas spring with greater force, it must be ensured firm, especially when the nitrogen gas spring is inverted or installed on the upper mold. The gas spring needs to move continuously with the movement of the slider, only Only a firm connection can ensure the normal and stable operation of the nitrogen gas spring.
From the use of nitrogen gas springs, it is known that the gas spring is in direct contact with the parts, and the elastic pressure is transmitted to the working parts of the mold through the designed top plate, top piece block, blank holder, diagonal wedge and other mold parts. Whether the movement of the top plate and other mold working parts is balanced or not is related to the layout of the force system; on the other hand, the top plate also plays a role in transmitting force to the nitrogen spring, so in order to avoid the nitrogen spring being biased, improve the nitrogen spring To increase the service life of the mold and increase the service life of the mold, a design method in which the center of the pressure system of the nitrogen spring and the center of the punching force coincide. Therefore, in order to avoid the bias load of the nitrogen spring, improve the bias load bearing capacity of the nitrogen spring, and ensure the service life of the nitrogen spring, a design method in which the center of the pressure system of the nitrogen spring coincides with the center of the punching force should be adopted.
