Avoid Deformations When Bending Near Cut-outs

Fabricators all know there are two normal ways of bending for press brake:Air bending and Bottom bending

1Air bending:

Bending sheet metal in different angles using a limited set of tools.

Air bending is a really flexible way to bend sheet metal using a press brake. This method allows for bending at different angles without needing to change tools, making it versatile and efficient for various bending needs.

Air bending sacrifices a bit of accuracy for speed and convenience. It's faster and easier to do, which can be a big advantage in a production setting where time is critical.

2.Bottom Bending:

Bending Sheet metal by enclosing the sheet metal between the punch and die.

Bottom bending is great when you need really precise bends in your metal parts. It ensures accuracy and neatness, making it ideal for projects that require high levels of precision.

Both of these bending methods can be done using either a nc press brake or cnc press brake.

How to do when you meet holes,slots or cutouts near bending line?

When you put holes, slots, or cut-outs too close to bending line, they might get squished or changed in shape. To avoid this, it's best to keep them a bit farther away from where the bending happens. If you can't move them, we have some ways to help make sure they don't get squished too much.

Mini Distance Holes When Air Bending:

1.Minimal distance with slotted holes 

Ymin = ri+2S 
L ≤ 25mm (.984), Ymin = ri+3S 
L > 25mm (.984) and ≤ 50mm (1.969), Ymin = ri+4S. 
L > 50mm (1.969), Ymin = ri+4S

2.Minimal distances with round holes 
Ymin = Ri+2S 

3.Minimal distances with rectangular holes 
Ymin = ri+2S 
L ≤ 25mm (.984), Ymin = ri+3S 
L > 25mm (.984) and ≤ 50mm (1.969), Ymin = ri+3.5S. 
L > 50mm (1.969), Ymin = ri+4S.

Two ways to bend with cut-outs near the bend line

Rota bending:

Rizhen Rolla-V Die's Standard length is :

There are four types:440mm,450mm,455mm and 470mm.

According to the length of the press brake machine worktable,it is used in combination.

The standard segmentation size is :

Lower model: 15+20+25+30+50+100+200=440mm(Set)

Lower model:20+25+30+35+40+100+200=450(set)

Lower model:45+50+60+100+200=455 mm(Set)

Lower model:35+40+45+100+200=470(Set)

Bottom bending:

We supply Rolla V Die ,If you need ,please contact us freely.

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