What Is The Best Welding Machine?

With the coming approval of the Keystone Pipeline, plus all the shale oil activity, and even President Obama saying he likes natural gas, the demand for 6G code pipe welders is going to go through the roof. The question is, how do you get hired to weld pipe?

The mig welding depends upon the voltage and feed rate. When you use this China Welding Equipment see that the voltage and feed rate are set properly. Another thing to remember is to wear the protection gloves and helmet. That’s because when the metal is connected with the welder small spark are thrown out. Which means it can damage your eyes and can burn your skin. Another important thing is work in an open space. Before working with mig weld see that the place doesn’t have any object which can catch fire in no time. If you are a beginner in this field then first try to practice on small scraps of metals.

First off you will want to spend some time preparing the surfaces. You can use an angle grinder to clean up the edges and remove any rust, old weld or dirt. Using the angle grinder it’s also helpful to make a 45 degree chamfer along the edges you plan to weld. This will help to achieve a strong, deep weld.

For tig welding aluminum, set polarity to A/C, A/c balance to around 7, high frequency to continuous. All other machine settings above are same as for tig welding steel.

Before we start, let’s get an understanding of what happens when we strike an arc with welding electrodes. The size of the welding rod, amperage and plate thickness determine weld fusion (adhesion) initially. In other words, a large diameter welding rod on a thin steel plate will blow right through it. On the flip side, a small diameter welding rod on thick steel plate may not start the arc and, if you do, the weld will not fuse to the steel but simply lay on the surface of the steel plate. This is where preheat comes to your aide. Preheat allows you to use small welding electrodes with thick steel plate.

The world of Lincoln SA200 welders is an interesting one. Lincoln wound some of them in the 1970s with aluminum, but went back to copper with the Pipeliner Classic Series ll. Stay away from aluminum if you’re going to get a Pipeliner.

When it comes to doing an open root welds on pipe or plate the general rule is you must have a good fit up! That is more than half the battle. Even the best welders will have a lot of difficulty putting in the root pass if the joint fit up is poor. The ideal fit up should have a landing ranging between 1/16″ to 1/8 of an inch. The gap between the two pipes should also be between 1/16″ to 1/8 of an inch. Ideally you want the landing and gap to be consistent all the way around the pipe. It’s easier said than done!

You are just about done now. Turn you gas back on. Now ideally you want the wire feed tension mechanism to be as light as possible so that it does not deform the shape of the welding wire. Deforming the shape of the welding wire will case premature wear on the feed rollers simply because of too much force. It will cause irregular wear on the contact tip and the welding wire will have tiny bits of material shaved and squeezed off it which will go down into the liner of the torch, and over time cause it to build up internal resistance which will cause more trouble welding down the track.