Abstract: Quadruple-wall curly brazed tubes, characterized by high reliability, high strength and high leakage-resistance, are applied widely to high pressure tubing lines. The forming technology is the key step in the manufacturing processes. The continuous forming processes of the f10 mm quadruple-wall curly brazed tube made by the steel strip with 0.5 mm thickness is simulated by means of powerful nonlinear software-Marc. The forming pattern of quadruple-wall curly brazed tubes is analyzed. The results can provide theoretical basis for roll arrangement design of quadruple-wall curly brazed tubes.

Key words: Forming, Quadruple-wall curly brazed tubes, Simulation