Is there a difference in material cost between metal roll forming and press brake?
A. The cost of the material is generally higher for press brake forming because material has to be slit and sheeted-cut-to-length; metal roll forming accommodates very long parts lengths because the material is coiled. Q. Which method produces the highest parts accuracy? A. Press brake forming is regarded as an “art,” and varying levels of quality are a reality. Out-of-tolerance parts are salvaged or scrapped. Metal roll forming produces higher accuracy, and a much lower percentage of out-of-tolerance parts. Q. Why does press brake forming produce less accuracy in parts than metal roll forming? A. The bend angles attempted with press brake forming are dependent on the specific material, its spring back properties, and the friction between the die and the blank during forming. In metal roll forming, the material is progressively bent, and it’s in contact with the forming dies for a longer time. The shape is reinforced by this lengthened contact, virtually eliminating spring back and mak
