Aluminum elliptical heads offer superior corrosion resistance and excellent thermal conductivity compared to other common heads. They are lightweight and easy to use, and with the development of the economy, they are gradually replacing some heads made from less durable materials. Elliptical heads are actually sealing components, primarily used for sealing certain pipelines, especially medium and low-pressure vessels. Sealing heads come in various shapes and materials, but aluminum elliptical heads fall into a moderate manufacturing difficulty category; they are not as easy as hemispherical heads and not as challenging as dish-shaped heads.
When it comes to the application fields of aluminum elliptical heads, those in the know understand that they are extensively used in boilers, pressure vessels, rocket casings, nuclear reactors, artificial satellites, and other equipment. They serve as crucial components on these devices, playing an indispensable role.
Standard elliptical heads, as one of the more critical pressure vessel components, are typically selected based on required standards. However, in many cases, some staff opt to substitute with spun elliptical heads when faced with difficulties in processing standard elliptical heads. This approach is not advisable.
On one hand, the standard elliptical head and the spinning elliptical head differ in manufacturing methods, thus they cannot be effectively substituted for each other. The shape of the standard elliptical head is determined by the stamping die, so as long as the stamping die is processed according to the standard elliptical head shape, the resulting stamped head will be a standard elliptical head.
The manufacturing process of a spinning elliptical head typically includes blanking, bulging, and flanging. Flanging involves using a flanging machine to process the folded edge of the head, followed by the internal forming wheel to compress the radius of the folded edge. Once flanged and shaped, it becomes a spinning elliptical head, which is essentially a disc-shaped head with a specific geometric shape.
On the other hand, the pressure distribution between standard elliptical heads and spin-formed elliptical heads also differs. The circumferential stress of the spin-formed elliptical head at the point of tangency is greater than that of the standard elliptical head's circumferential stress.