Expansion Joint Rerolling Machine

The Expansion Joint Rerolling Machine is a specialized piece of equipment designed for precision rerolling of stainless steel expansion joints and metal bellows. This machine restores the corrugation profile and enhances the circularity and surface finish of bellows after forming, welding, or assembly. It is an essential process to ensure dimensional accuracy, uniformity, and proper alignment in high-performance bellow systems used in piping, exhausts, and industrial joints.

Key Features

• Designed specifically for stainless steel bellows and expansion joints • Restores corrugation sharpness and radial consistency • Improves roundness and concentricity of formed bellows • Adjustable rollers for different diameters and corrugation depths • Robust frame with precision alignment fixtures • Manual, semi-automatic, or fully automatic versions available • Optional digital display for speed and pressure monitoring • Compatible with SS 304, SS 316L, Inconel, and other alloys

Technical Specifications

Parameter	Specification
Workpiece Type	Expansion Bellows / Metal Joints
Material Compatibility	SS 304 / 316L / Inconel / Hastelloy
Diameter Range	100 mm – 600 mm (customizable)
Corrugation Depth	Up to 25 mm (adjustable)
Operation Type	Manual / Semi-Automatic / Automatic
Roller Adjustment	Motorized / Manual
Drive System	Gearbox + Electric Motor / Hydraulic (Optional)
Control Panel	Digital or PLC-based (as per model)
Machine Base	Fabricated Steel Structure

 

Applications

• Rerolling of expansion bellows after hydroforming or welding • Enhancing circularity and pitch uniformity before final inspection • Preparing bellows for flanging, welding, or assembly