8 lines of ERW tube mills installed in China for automotive seat system pipes of high strength steel in different standards, majorly super high strength headrest pipes, seat back and bottom frame pipes.
OD precision can be controlled within ±0.02mm, oval tolerance to be ±0.02mm also, straightness ≤0.8mm/m.
The welding speed of high strength automotive pipes can reach 60~80M/min while ensure quality and stable seam.
The roller quick change system enables roller changes in 10 minutes and resumes production in 20 minutes.
The production line also designed to be high strength, CNC high precision for the roller stands of forming section, sizing section and straightening section, strict precision assembling also.