FOCUS ON FOLDERS
We pinpoint a selection of the latest new global CNC folding innovations , technologies and software .
FLEXIBLE FOLDING
Image : RAS .
A folded panel .
Sheet metal folders are indispensable tools in the metalworking industry . Using the sheet metal folder , users can curve and fold fascinating and elegant shapes from a single plane sheet of material without stretching , tearing or cutting . They are designed to make precise and consistent folds , saving time and effort , as well as processing a variety of sheet metal materials of varying thicknesses .
Folders feature an integrated support back gauge that holds up the weight of the items for the operator . There is no need for operators to push large sheets through from the front . The bending technique also makes it easier for operators to bend multiple set-up parts that would typically call for additional manual interference .
For those manufacturing items using thin materials that are long and wide with short flanges , folders are a good fit . This is because they allow the material to rest on the folder bed for easier handling . Folders are easily identified by their large support tables and swinging ‘ folding beam ’, which bends the flange while the workpiece remains flat on the support table . These machines are suitable for many scenarios , especially for large blanks that would otherwise be difficult to handle .
Folding machines can bend all angles with a single set of tools . The machine automatically adjusts to the material thickness . Higher automated folding machines come with an automatic tool changer .
“ Folding machines clamp and bend the part when it is laying flat on the gauging table and the flange is being bent , which helps accuracy so that the operator does not need to ‘ manage ’ the part during the forming process .”
Metal folding at LAMIERA 2022 .
Image : JORNS AG .
Counting the benefits
On a folding machine , the entire part is inside the machine . Only a short flange stands out of the upper and lower beam tool . Folding reduces the sliding area of tools on the material surfaces to a minimum or completely eliminates it on some machines . As there are only very slight relative movements between the tool and the material surface , the tooling shows no abrasion wear even after years of use .
On folding machines , a radius can be easily created of short bending segments . By using small steps , the outside of the radius will be very smooth and the individual steps will not be visible . Folding does not require special tools for hemming .
The folding process is suitable for flexible applications because the tooling is not specific to the material thickness or angle required . “ Universal ” tool geometries allow for unlimited angle possibilities and are rated up to the maximum machine capacity and height .
There are several types of folding machines . On systems equipped with segmented clamping tools , a new part can be set up by rearranging the tool segments on the tool rail . Machines without automatic tool changers still
102 | ismr . net | ISMR October 2024