Beading
A simple and economic way of adding reinforcement to a metal sheet
Beading
There are two ways to add a bead to a metal sheet. The first variant, using the “normal” beading tool which consists of achieving the contour by means of stamping with a large number of strokes through local cold forming processes. This procedure is comparable to nibbling.
Secondly, a bead can be produced by means of a beading tool. In this case, a roller with a defined contour passes over the sheet and produces the contour of the bead in one go by means of cold forming processes. The great advantage in this case, is the better quality of the part due to the absence of nibbling marks.
In general, beads have the advantage of being stronger due to hardening by deformation that increases the strength of the component, which allows the thickness of the sheet to be reduced for the same load. In addition to their function as stiffeners, these can also be used as drainage devices for liquids and as guide elements for cables.
Notes on manufacturing
- The thickness of sheet S for flanging can be between 0.8 mm and 1.5 mm, although up to 2 mm is possible for mild steel and even up to 2.5 mm for aluminium. For the normal flanging tool, it can be between 1 mm and 3 mm.
- With roller flanging, the forming height H can be between 2.5 mm and 3 mm, the flange height H with normal flanging can be up to 2×s.
The minimum travel radius R for roller flanging is 20 mm. Depending on the tool, the minimum travel radius R for flanging with the beading tool is between 40 mm and 80 mm.
The minimum distance A between the two beads is negligible for the roller flanging. In the case of beading with the beading tool, it depends on the tool and ranges between 20 mm and 45 m.
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