To anneal work hardened aluminum coat the panel with the soot from a smoking acetylene torch flame.
How to remove warping in aluminum sheet metal.
Use clamps to control expansion.
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Though weld shrinkage cannot be prevented it can be controlled by following these steps.
Top ways to keep metal from warping when welding.
Weld along the neutral axis.
Fix problems before they permanently set.
Use intermittent welds instead of continuous welds where possible to minimize the amount of weld metal.
Move around on your project.
Intermittent rather than continuous welds help as does minimizing the amount of filler metal used.
Minimize the amount of heat put into the weld.
Welding heat sink applying a heat sink behind the weld or on the surrounding metal of a weld will help keep the the heat from spreading and.
Preset the pieces sometimes called counter or opposing set up.
Here s a list of tips that help reduce warpage in sheet metal fabricaitons.
Design and welding should be addressed to minimize this sort of warping.
Aggressive abrasives like coal slag or aluminum oxide generates more heat and peening.
The bigger the weld the greater the shrinkage.
Then use a neutral flame to heat the panel and burn off the soot.
Correctly sizing a weld not only minimizes distortion but also saves weld metal and time.
Hope this offers an alternative.
So here are 11 ways to prevent sheet metal from warping in tig welding.
Accordingly the aluminum will have reached the annealed temperature.