ERW Tube Mill for Carbon Steel: Production Workflow and Technical Integration

Shijiazhuang Faith Machinery's ERW tube mills transform carbon steel coils into structural and fluid transport conduits through integrated mechanical and electrical systems.

Coil Processing Fundamentals
Entry sections incorporate rotary shears for precise edge trimming, removing oxidized material that could compromise weld integrity. Pre-forming levelers eliminate coil set while tension control systems maintain uniform material feed. Loop accumulators bridge material gaps during coil transitions, enabling uninterrupted production flow.

Progressive Roll Forming
The forming section utilizes sequenced contoured rolls that incrementally shape flat strip into cylindrical form. Roll stand configurations are engineered to distribute forming stresses evenly, preventing edge buckling. Each station's vertical and horizontal adjustments allow precise control over the forming envelope. Final sizing stands calibrate the tubular profile to exact dimensional specifications.

Electric Resistance Welding Technology
Contact electrodes apply controlled pressure while high-amperage current flows through the V-convergence point. Resistance heating creates instantaneous fusion along the seam line. Squeeze rolls consolidate the molten zone under calibrated pressure, forming a homogeneous metallurgical bond. Weld parameter controllers dynamically adjust power based on material thickness variations.

Post-Weld Treatment Systems
Immediate water quenching stabilizes the weld microstructure. Normalizing furnaces then restore ductility through controlled recrystallization. Air cooling tunnels bring the tube to ambient temperature gradually, preventing residual stress formation. Straightening units correct any longitudinal curvature before cutting.

Operational Control Philosophy
Centralized PLC systems synchronize drive speeds across all sections. Human-machine interfaces display real-time production metrics and system diagnostics. Automatic tooling changeover sequences reduce profile transition downtime. Remote connectivity enables production monitoring and technical support functions.