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Metal Bellows Technology

Seamless Bellows Production Process

Seamless Bellows Production Process Step 1

Step 1

A flat metal strip is punched into circular disks.


Step 2

Seamless Bellows Production Process Step 2

The disks are formed into small cups. Then, these cups are degreased in a modern washing bay and annealed in a vacuum furnace.


Step 3

Seamless Bellows Production Process Step 3

A series of long draws transforms the cup into a seamless, closed-end tube of the highest quality.


Step 4

Seamless Bellows Production Process Step 4

While in the forming die, 1500psi of water pressurizes the inside of the tube as it is compressed, creating the corrugations.


Step 5

Seamless Bellows Production Process Step 5

The bellows are trimmed to size.


Step 6

Seamless Bellows Production Process Step 6

A final compression stage sets the bellows and gives it spring-like characteristics.