The stepped mandrel features multi-stage diameter integrated structure, specially developed for stepped variable-diameter tube forming. It can complete multi-step diameter expansion and wall thickness forming in a single rolling operation, avoiding repeated tool replacement and secondary clamping. All stepped sections are ultra-precision ground to ensure smooth transition between diameters without scratches on the inner tube wall. Ideal for aircraft composite pipelines with variable calibers, automotive precision fluid pipes and multi-section thin-wall tubing forming work.
Raw Material: Alloy Tool Steel
Step Diameter Customization: Supported
Surface Roughness: Ra ≤ 0.02 μm
Application: Variable-diameter stepped tube expansion
Tolerance Grade: Ultra-precision level
