In die design, the transmission of elastic pressure is kept in balance, and more than one controllable gas spring is often selected. Then, the layout of the force points should focus on solving a balance problem. From the perspective of stamping process, it is also necessary to consider the issue of stamping balance, in order to improve the service life of the die and ensure the quality of stamping parts.
It is known from the use of controllable gas spring that the controllable gas spring is in direct contact with the parts, and the spring pressure is transmitted to the working parts of the mold through the designed ejector plate, ejector block, blank holder, wedge block and other mold parts. Then whether the movement balance of the working parts of the mold, such as the ejector plate, is related to the arrangement of the force system: on the other hand, the ejector plate also plays the role of transmitting force to the controllable gas spring, Therefore, in order to avoid eccentric load of controllable gas spring, improve the eccentric load bearing force of controllable gas spring, and ensure the service life of controllable gas spring, the design method that the center of controllable gas spring pressure system coincides with the center of impulse pressure is adopted.
The controllable gas spring requires considerable stability and reliability both during installation and operation. Because of its large elastic pressure, a controllable gas spring will release hundreds of kilograms or even tons of force in a small volume, and this process is repeated. Therefore, it is very important to maintain the stability of its work. In particular, the controllable gas spring with large force must be firm, Especially for the inverted controllable gas spring or the one installed on the upper mold, the controllable gas spring needs constant relative movement with the movement of the sliding block. Only a firm connection can ensure the normal and stable operation of the controllable gas spring.
Therefore, when the controllable gas spring is designed and installed, or the cylinder block or the plunger is provided with a certain depth of installation counterbore to ensure its alignment and avoid deflection. It is said that the working property of controllable gas spring belongs to the flexible category. In the working process of the mold, the opening and closing are relatively smooth without impact. To achieve this goal, the designers should fully consider this when using independent controllable gas spring.
As mentioned above, the frequency of controllable gas spring is very high. Once parts contact the plunger rod of controllable gas spring, spring pressure can be generated without any pre tightening process. With the up and down movement of the slider of the press, the controllable gas spring will open and close quickly. If the design is improper, especially if the controllable gas spring is used on a small tonnage press, the phenomenon of helium spring pushing the slider back may occur, The movement curve of the slider of the crank press is destroyed, resulting in vibration and impact. Therefore, this phenomenon should be avoided as far as possible.
Post time: Dec-19-2022
