How to choose shaped spring? To solve this problem, it is usually necessary to consider the pressure of the shaped spring, the stroke, the number of shaped springs and the pressurization ratio of the shaped springs.

1. Selection of elastic pressure

According to the calculated impact pressure to select the number of shaped springs, models, each shaped spring spring spring pressure. Generally speaking, according to the calculated impact pressure, plus 15%-20% increase in the amount to choose the shaped spring spring pressure, more in line with the actual situation. Because the first, when the mold wear, there will be a gap change. The change of technological parameters, such as the dullness of the cutting edge, and the inconsistency of the deformation resistance of the die thickness and the die plate will cause the change of the deformation resistance of the workpiece, so the deformation resistance should be allowed in the design. Second, when the special-shaped spring is inflated, the high pressure gas will inevitably have throttling loss, making the elastic force float down. Third, the life of the shaped spring is very long, after a period of use, the high-pressure shaped will have a certain leakage, resulting in a slight drop in the spring pressure.

2. Quantity selection

Should be based on the line demand, combining the structure of the mold and the point of force for the placement, is the mold in the work will not appear biased load phenomenon, but also must make the mold adjustment convenient. In this way, the shaped spring in the use of the side can have enough life.

3. Selection of pressurization ratio

According to the characteristic curve of the special-shaped spring and the requirement of stamping process, the type number of the special-shaped spring can be determined. In particular, it is more important to determine the pressurization ratio when the working force is required to change steadily, or the working force is basically constant and the initial force is large.

4. Itinerary selection

No matter what kind of process, when selecting the shaped spring, we always hope that the total height of the shaped spring is not too high, so as to avoid the occurrence of instability phenomenon and the structure is too complex when installing on the mold, and the greater the stroke, the higher the price of the shaped spring, which is particularly important for the independent shaped spring. If the process needs, the travel is indeed larger, it is recommended to use the special-shaped spring plate system, so as to reduce the height of the mold, improve the stability and reliability of the special-shaped spring. Sometimes in order to safety, to avoid accidents, in the choice of special-shaped spring, need to increase the 3-5mm safe travel.