Say you re bending 0 25 in thick 6061 t6 aluminum to a 100 degree external angle 80 degree internal angle.
How to bend aluminium sheet metal.
The inside bend radius should be equal to the thickness of the material that you re forming.
Mark your bend lines.
To make this easier you d start with your 6061 material in the soft t 0 state.
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If you re bending 0 020 thick material use a 0 020 radius.
You will use the protractor to gauge the brake as you bend the metal little by little.
Wipe bending or edge bending is another way to bend sheet metal edges.
Die opening with a relieved profile.
Insert your aluminum sheet into the brake beneath the removable clamp bar.
In other words if you re bending 1 8 sheet use a tool with a 1 8 radius to form the inside of the bend.
Then place the clamp bar back down on top of the aluminum crosswise.
Determine the angle at which you want to brake the metal and mark it on the protractor.
Make sure the bar is seated firmly inside the frame.
Then use your bend allowance to draw your second bend line the intervening distance between your bend lines bend radius.
Let s consider a challenging job.
Lift the clamp bar away from the rear of the brake frame and slide the sheet in perpendicularly to the direction you want to bend it.
The slack between the wipe die and the punch plays an important role in getting a good result.
Here s a good rule of thumb for most materials.
Simple sheet metal bender using a hand roller clamps and plywood.
Now that you know your bend allowance take your protractor and draw a clear line with your marker across the point at which you will bend your sheet metal.
You d probably air bend by using a 3 0 in.