For many people who are new to manual arc welding or do not often do manual arc welding, it is not easy to have a beautiful and quality weld. Here are 5 Basic Techniques for Arc Welding when performing manual arc welding to ensure weld quality:
Set the current, adjust the arc length, adjust the angle of the welding rod, manipulate the welding rod and adjust the welding speed.
Preparation before welding
For many people who are new to manual arc welding or do not often do manual arc welding, it is not easy to have a beautiful and quality weld.
In fact, stick welding is a welding technique that does not require high cleaning of the welding position, however, this step should not be skipped. Before welding, it is necessary to remove dirt with a brush or use a specialized surface cleaning tool. The cool clamp area must also be cleaned to ensure good contact, which will help stabilize the arc. In addition, the welding position must ensure that the welding puddle is clearly visible. Workers must choose the best viewing direction, avoid being covered by welding hands, and avoid toxic welding fumes.
Here are 5 Basic Techniques for Arc Welding that welders need to master.
1. Current setting
Depending on the type of electrode used, the device used needs to set the forward, reverse or alternating current. Need to make sure your equipment is set up properly before soldering.
The amount of welding current depends on the rod diameter and the type of welding electrode you use. The soldering iron manufacturer usually provides information about the appropriate line for the soldering iron on the packaging. The welding current can be adjusted according to the following calculation: 1Amp corresponds to 0.0254 mm of welding rod diameter.
You can let the welding current be low then adjust it up by 5 to 10 Amp and then consider the welding ability accordingly.
2. Arc length adjustment
The arc length depends on each type of welding rod, each welding position. Basically the welding arc length should not exceed the welding rod diameter. When the arc length is too short, it can cause an unstable arc, which can cause the arc to extinguish, the weld pool to harden faster and create high solder flakes.
An arc that is too long will cause splashing, slow precipitation, and porosity.
Note : For those who are new to welding, they often leave the arc too long, because they want to observe the arc and the welding puddle, however, it is recommended to change the welding position to be able to see the arc and the welding puddle better. should prolong the arc. With a little practice you should be able to guarantee a low spatter weld.
3. Adjust the welding rod angle
For surface welding, the angle of the welding rod should be from 5 to 15 degrees in the direction of the movement, for the vertical position arc welding, the angle of the welding rod should be from 0 to 15 degrees in the opposite direction to the direction of the welding rod.
4. Welding rod operation
Motion along the weld axis maintains and adjusts the arc length. Horizontal movement maintains the width of the weld. There are many types of motion: horizontal, continuous and intermittent movement depending on the thickness of the solder.
With thin solder, there is no need for horizontal movement of the welding rod because the width of the arc is enough to fill the weld groove. With vertical welding should pay attention to welding from the bottom up with thick plates and from the top down with thin plates (pay attention to the edge of the weld groove).
5. Adjust welding speed
The welding speed should be such that the welding arc occupies 1/3 of the length of the welding puddle. Welding too slowly will create convex solder scales and do not melt. The arc lost heat cannot melt the solder.
Welding speed is too fast, which reduces the penetration of the weld, uneven solder and does not fill the weld puddle.
Above are 5 Basic Techniques for Arc Welding. In order to ensure the welding process as well as avoid unnecessary risks, welding workers need to master the basic welding rules and practice regularly, thereby improving product quality as well as productivity. In working process.
Basic Techniques for Arc Welding FAQ
1. What types of welding are covered in this course?
The course covers all types of welding, including gas tungsten arc welding (GTAW), mig welding, and stick welding.
2. What are the most important safety precautions to take when welding?
The most important safety precautions to take when welding are to wear a safety helmet, shield, and gloves. Additionally, make sure the work area is properly ventilated and clean to avoid sparks and debris.
3. What should I do if I get an arc while welding?
If you get an arc while welding, immediately put down the workpiece and remove your welding gloves. Next, use a metal scraper or a disposable welding shield to put out the arc. Finally, re-attach your welding gloves and resume welding.