For many people who are new to hand welding or irregular hand welding, it is not easy to have good welds and quality assurance. Here are five basic things you need to consider when performing manual arc welding to ensure weld quality: Set current, arc length, arc welding angle, welding electrodes and welding speed.
Welding rods are welding techniques which require cleaning of the welding area at least, however, so do not ignore this step. To remove dust from the brush or use specialized surface cleaning equipment, also clean the clamping area to ensure arc noise.
The welding posture must ensure that the welding pits are visible. Workers must choose the best view, avoid welding hands to cover eyes, as well as welding smoke.
5 techniques for manual arc welding: Set current, arc length, angle of arc welding, welding electrodes and welding speed. To meet these rules when welding workers need to practice regularly to be proficient which can improve product quality as well as productivity.
1. Set the current
The electrodes you choose will determine whether your equipment will need to set a forward or reverse direction or alternating current. Make sure you set up the proper equipment before welding.
The correct welding current depends on the welding rod diameter and the type of welding electrode you are using. Generally the manufacturer will give you the electric current that matches the welding rods they provide. You can select the welding rod according to the following calculation with 1 Amp corresponding to 0.0254 mm welding rod diameter. You also try to adjust the welding current 5 to 10 Amp and then consider the welding ability accordingly.
2. Arc length
Arc length depends on the type of welding rod, the welding position, the welding arc length should not exceed the welding rod diameter. When the arc length is too short it can cause unstable arc, which can deactivate the fast paced arc welding and create high flake scales. Very long arcs will cause splashes, slow acceleration and porosity. The light is too short. The light is too short.
Note that for newcomers to welding they often leave the arc too long, because they want to observe the arc as well as the puddle, but you should change the welding position to be able to see the arc and watch the puddle. Weld better and should not extend the arc, with a little practice you will be able to ensure that there is less low splice splash.
3. Angle of welding rod
For face tough welding, the welding rod angle should be from 5 to 15 degrees in the direction of movement, for arc welding the vertical position should be to angle the welding rod from 0-15 degrees to the direction opposite welding rod.
4. Operation of welding rod
Movement along the weld axis to maintain and adjust the arc length. Horizontal movement to maintain the width of the weld. There are many types of motion: horizontal, continuous and intermittent motion depending on the thickness of the weld. With thin welds there is no need for horizontal movement because the arc width is sufficiently filled. With the solder stand you should note the bottom solder with thick plates and weld from the top with thin plates and pay attention to the welding edge.
5. Welding speed:
Welding speed should ensure that arc welding takes 1/3 of the length of the weld pool. Too slow welding will produce fluxed and non-weldable flakes. Arc lost heat can not molten solder.
The speed of welding too fast decreases the penetration of welded, irregularly welded seams do not fill the welding puddle.