5 basic techniques in arc welding
For many people who are new to hand welding or irregular hand welding, it is not easy to have a good weld and quality assurance. Here are five basic things you should consider when performing manual arc welding to ensure weld quality: Set current, adjust arc length, adjust arc angle, Adjust the welding speed.
For many people who are new to hand welding or irregular hand welding, it is not easy to have a good weld and quality assurance.
In essence, soldering is a very inexpensive welding technique to clean the welding position, but this is not to be missed. Prior to welding, dust should be removed by brush or using specialized surface cleaning equipment. The pliers must also be cleaned to ensure good contact, which will help stabilize the arc. In addition, the welding posture must ensure that the welding pits are visible. Workers must choose the best view, avoid welding hands, and avoid harmful welding smoke.
Here are five basic manual arc welding machine price in india techniques that the welder needs to grasp.
1. Set current
Depending on the type of electrodes used, the equipment used should be set to positive, reversing or alternating current. Make sure you have the device set up properly before welding.
The size of the soldering line depends on the welding rod diameter and the type of welding electrode you use. The manufacturer of the welding rod usually provides information on the line that matches the welding rod on the package. The welding current can be adjusted according to the following calculation: 1Amp corresponds to 0.0254 mm welding rod diameter. You can let the current flow low, then adjust up 5 to 10 Amp and then consider the welding ability accordingly.
2. Adjust the arc length
Arc length depends on the type of welding rod, welding position. Basic welding arc length should not exceed the welding rod diameter. When the arc length is too short can cause unstable arc, can turn off the arc, welding hardened faster and create high welding scales. Too much caustics will cause splashes, slow deposition rates and porosity.
Note: For newcomers to arc welding is too long, because they want to observe the arc and the welding pool, but should change the welding position to be able to see the arc and potting better, no. Should extend the arc. A little practice you will be able to guarantee get less low splash splash.
3. Adjust the angle of the rod
For surface 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 in the opposite direction of welding rod.
4. Operation of welding rod
Movement along the weld shaft maintains and adjusts the arc length. Horizontal movement maintains the width of the weld. There are many types of movement: horizontal, continuous and intermittent motion depending on the thickness of the weld. With a thin weld without the need for horizontal movement of the welding rod because the arc width is sufficient to fill the welding groove. With the soldering stand should pay attention welding from the bottom up with thick plates and welding from the top down with thin plates (pay attention to welding edge).
Operation of welding rods
5. Adjust the welding speed
Welding speed should ensure that welding arc takes 1/3 of the length of the welding puddle. Too slow welding will produce fluxed and non-porous scales. Arc lost heat can not molten solder.
Slow welding speed
The speed of welding too fast reduces the penetration of welds, uneven welding flakes and does not fill the welding pool.
Welding speed too fast
In order for the welding process to be guaranteed as well as to avoid unnecessary risks, welding workers need to master the basic welding rules and practice regularly so that they can improve product quality as well as productivity.