Last month I described the advantages, which include ease of forming and dimensional accuracy, and disadvantages, which include the low strength of a V-groove bend. At the press brake, the operator can bend the grooved metal into various angles and shapes using off-the-shelf or custom tools. After groove-cutting, the bend can be completed at the press brake or even by hand. The grooving process, performed by a separate cutting machine, produces a V-cut located at the bend line. It’s also known as score-folding, V-cutting, and back-scoring. V-groove bending can establish the bend line and bend angle using grooves cut along the bend line. If you see an architectural panel bend with an outside radius that’s extremely tight for the material thickness-and it looks perfect, free of any trace of cracking-chances are it was formed with V-grooving. Last month I introduced the concept of V-grooving, a viable option if you need to produce cosmetically critical bends with very tight bend radii. Multiple cutters in the V-grooving machine help reduce heat buildup.
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