JCOE Steel Pipe
JCOE steel pipe manufacturing technology is developed a kind of welded pipe forming technology in the 1990s, the process of the molding is to first plate edge milling ( or plane ) after longitudinal edge bending, then press J→C→O sequence forming, each step stamping with three points bending theory.
As is the multi-pass progressive pressing, so following problems must solve: how to determine the shape of the mold, mold and die stroke spacing, and the need how many times can guarantee the stamping the most appropriate bending radius and the best opening gross of round billet. And these problems with different steel materials, steel production plant specific mechanical properties, steel pipe specifications ( diameter and wall thickness ), which is very complex. At present, mainly by " trial and error", which replaced whenever the new standards or new steel grades, get a certain number of samples tested, working out a suitable stamping volume. Trial and error method is more reliable, but the efficiency is relatively low. Due to many technical parameters, only through trial and error method is trouble. In order to obtain a set of sophisticated technology, or even require months of trial and error process. But in the process of trial and error often uses fixed lower mold shape and spacing, only to explore punch stroke, so the results may not be optimal, without sufficient play unit capacity.
So it is very necessary to study the influence factors of molding system, to establish the theory and formula, with the trial-and-error experience for molding process, thus don't need or want to test, reduce development cost and time, improving the production efficiency.