The single bellows hydraulic bulging machine is a special hydraulic equipment used for metal plastic forming.

The working principle of this device is to place the pipe fittings on separate molds, use an oil cylinder to drive the joint to lock the mold, use high-pressure water to expand the pipe fittings in sections (bulging), and then use a servo driven screw to push the molds to close and form a corrugated pipe (pushing wave).