Welding is quite a popular and easy fabrication process. The process of welding starts when you start an arc and a weld puddle is created. The filler metal is then dipped into the weld puddle and at the same time it is pushed along the joint of the weld. Then, you need to extinguish the arc and keep the welding torch on top of the puddle until the weld puddle cools. In this article, we will be discussing some tricks and tips to give you the best welding results.
How to Prepare the Weld Joint
The most important part of the preparation is to clean the area of the joint as well as the filler metal. Ensure that all the dirt, grease, oil, paint, etc. are removed properly as the presence of any of the contaminants can cause the arc to become unstable and produce contaminated welds.
The workpiece may have to be clamped if you are unable to support it during the process of welding.
Tacking the Weld
Use short ¼-inch tack welds all along the workpiece to hold it together.
Positioning the Torch for Various Kinds of Joints
Make the weld pool such that the overlapping piece’s edge and the surface of the second piece are together for a lap weld. The edge of the workpiece will melt quickly, so, keep the filler rod dipped near the edge and ensure that you use sufficient filler metal in order to finish the joint.
Ensure that the weld pool is centered on the touching edge when you’re making butt joint welds. Reduce the heat while finishing to fill the crater.
In the case of a corner joint, you need to melt both edges of the adjacent pieces and keep the weld pool on the centerline of the joint. This joint requires a convex bead, which requires an adequate quantity of filler metal.
While a T-joint is being welded, the flat surface and the edge must be joined, and the edge of the workpiece will melt more quickly. Angle the welding torch so that more heat is directed onto the surface and in order to maintain a shorter arc, extend the electrode away from the cup. Place the filler rod where the edge of the work is melting.
How to Improve the Arc Starting?
One ways by which the arc starting can be improved is by making use of the smallest diameter of tungsten according to the amperage being used. Ensure that the tungsten you are buying is of the highest quality. Use a high-quality welding torch and good work leads. Maintain the closest distance between the welding torch and the work leads and also keep the power source very close to your work. Make sure that all the connections are tight and prevent the cable from touching any grounded metal. Make use of 100% argon as the shielding gas.
When you are welding aluminum, make use of a 1.5% lanthanated (gold band) or ceriated (grey band) tungsten and AC current and when you are welding stainless steel, make use of DC current and 2% thoriated tungsten (red band). When using a TIG torch, always use a push technique and while you weld a fillet, ensure that the leg of the leg should be the same thickness as the parts being welded.
By using the tips discussed above, you are sure to get very high-quality welds that you can be proud of.