01.06.2008
The economic way of getting flat parts
Sascha Becker

Precision levelers provide better results in subsequent welding, bending or chamfering processes. With precision levelers, even difficult flame-cut parts, which can take hours to straighten manually, can be flat in just a few minutes.

Why does precision leveling of sheet metal parts make sense? Flatness errors can occur with sheet metal parts processed using mechanical or thermal cutting methods. This applies to all parts from thin laser-cut parts in the aircraft industries to thick flame-cut parts for construction machines. Flatness errors in sheet metal are usually caused ba different residual stresses in the material. Even the smallest differences in residual stress become clearly noticeable, particularly with wide sheets. The residual stress gets released when stamping or laser-cutting the parts. At the same time, new stresses are brought into the material. The result is twisted and skewed sheet metal parts. Flatness errors can have a negative effect on the whole sheet metal processing. If uneven partsget bent, chamfered or welded, then quality defects can occur. The trend towards tighter tolerances in sheet metal manufacturing means roller levelers are becoming standard equipment for more sheet metal companies. ... 

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