Make sure the bar is seated firmly inside the frame.
Bending aluminum sheet with heat.
Typically pure aluminum is more easily worked than the alloys.
It s usually not a big deal but under some conditions this might be a problem.
Heat it up to 1000 f let it soak at that temperature for about an hour then water quench it.
This type of hardening typically is performed in an inert atmosphere vacuum at temperatures between 900 and 1 150 degrees f.
Nothing complicated here just heat it up till it s red if it s ferrous and bend it.
Then place the clamp bar back down on top of the aluminum crosswise.
This weakens the aluminium and creates a fracture line.
Depending on designation alloys go through different heat treatment procedures during production.
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.
In the event that you are bending a thick piece of sheet metal you can apply heat from a blowtorch along the seam of your bend line to facilitate your bend.
With the aid of a straight edge and a sharp knife score both sides of the aluminium sheet.
Keep in mind that many kinds of fabricated metal have extremely high melting points and applying your torch injudiciously could cause damage or do harm to your sheet metal or equipment.
Try to re heat treat any annealed parts before machining if possible.
To create these precipitates the aluminum is heated using a solution treatment at high temperatures and at a prescribed time then quenched for rapid cooling.
Insert your aluminum sheet into the brake beneath the removable clamp bar.
If you bend aluminum cold and without annealing it you ll probably see that the stretched side turns kinda white.
Flip the sheet over and repeat.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.