Hydroforming is one such method. Internal high pressure forming begins with the creation of a mold in the desired bellows shape. Once set, the mold goes into a chamber that engineers can seal.
They put a piece of metal into the sealing chamber, close each end, and fill the remaining space with water. As the water enters, the pressure rises, pushing the sheet metal closer to the mold until it reflects that shape. This method is usually effective in producing irregular shapes and is also effective in bellows production.
It is also simple to perform this process with the same die over and over again.
An alternative method of manufacturing corrugated metal pipes is stamping and forming. This alternative method consists of using an expanded mandrel forming machine to punch out the gyrations from the inside of the cylindrical metal tube. Roll Forming From a different perspective, roll forming employs a machine that rolls each coil to a pre-determined diameter from the outside. This is a very common method when you need small custom designs.
Cold forming is a room temperature process that becomes increasingly difficult as the quality of the bellows changes throughout the process. It occurs in several stages and involves no cutting or welding. Instead, a machine presses the bellows into various molds until they reach a complete stage.
