Sliding and rolling friction in the production process can cause a cross curvature into the belt. The increased stress in the edge areas of the belts may sometimes produce edge cracks due to the metal fatigue in the affected areas. In addition, there is a higher risk of cracking if the effects of the curvature deform the originally rounded belt edge into a sharp edge ( see BERMT ). Cross curvature also may cause problems when tracking the belt.
The belts must stay flat and smooth during production – as long as possible. This can be archived either
Using the new Berndorf Band High Power Shot Peener the belt is bombarded
with steel grains with high kinetic energy and the resulting stress restores the original flatness.
Belts up to 3 mm thickness can be flattened , again. By using compressed air the High Power Shot Peening Head is sucked to the belt surface and special sealing material guarantees absolute no escape of peening balls.