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The evaluation preceding the refurbishment confirmed that, in its place of changing the complete pressure educate, best the power trains on stands two and three needed to be replaced to get rid of the vulnerable features. The available put in reserves of stands one, four and 5 were utilized and the weight optimally redistributed to achieve the necessary increase in throughput for the complete plant. New transformers and cycloconverters have been put in on stands two and three, and new motor and equipment instruments were installed on the present foundations. The "Motor Utilization model – MUM" newly developed with the aid of Primetals technologies changed into used for the primary time to make the highest viable use of the put in efficiency reserves of the new and present stand motors. the load became distributed optimally to adapt it specifically to the product combine and to attain the very best dynamic use of the forming forces of the individual stands. The aim turned into to achieve the maximum diploma of forming along the finished line, and to return as close as possible to the weight limits of the particular person stands.
The continuous vigour of the brand new machines is around 36 % better and they allow the rolling work to be optimally redistributed within the tandem mill. one of the low-voltage drives had been additionally replaced. as an instance, the rollers on the infeed aspect are now geared up with motors and drives that are as much as 50 greater in order to deliver the necessary pulling force at larger speeds. besides the renewal of the drive gadget, the technological controls in the fundamental automation and the stage 2 rolling laws have been modernized. The refurbishment of all parts of the plant turned into planned in exquisite detail and accomplished right on agenda within the timeframe of 15 days. It was even feasible to hold the primary exams of the rolling operation one day sooner than scheduled. the first strip changed into correctly rolled as planned on December 14, and the plant was introduced up to its previous throughput within three days.
the entire verifications for greater than 20 individual product companies, notably interstitial free grades and other products for the car sector, had been completed by the end of the first month. The plant additionally greatly surpassed the contractually agreed parameters inside the first few weeks.
PLTCM at Hyundai's Dangjin site now has a ability of round million tonnes every year. It techniques cold metal strip in widths ranging from 600 to 1,800 millimeters. The entry thicknesses can vary between and 6 millimeter, and from to three millimeters on the exit facet. The maximum strip velocity is 1,four hundred meters per minute. the line incorporates 4 four-high stands and one six-excessive rolling stand. Primetals applied sciences had fitted the road with process automation lower back in 2006.
supply : Strategic research Institute, SteelGuru