A good weld bead will be raised slightly above the work surface and look like a hump and not a mountain range.
Hayward, Ca (PRWEB) July 11, 2013
LONGEVITY Global Inc. supplies a huge range of welders and welding machines for a wide variety of welding tasks. This has made them a well-known supplier of all welding equipment in the area. They stock Mig welders, Arc, TIG, Plasma cutters, etc. amongst others for applications ranging from automotive welding, industrial welding and fabrication work. Along with all the products the company is also offering free tips on how to use welding machines and other equipment. They also collaborate and help entrepreneurs set up their welding business. Their welding supplies help their clients bring the cost down and make welding efficient and affordable. Since they have a huge lot of welding equipment, the company also offers certain tips to that would help the users to utilize them to their best.
USING THE CORRECT GUN POSITION AND LAYING DOWN YOUR FIRST BEADS
“You should get familiar with the feel of the gun and familiarize yourself with the effects of changing things like current and wire speed before you try any actual welding. You should start your practice using a common grade of carbon steel like A36, which is the most commonly used steel in manufacturing heavy equipment and readily available as scrap at most industrial equipment manufacturers. Try to find a piece that is about the same thickness as the steel in your work project so that you can get a feel for penetration without blowing holes through the piece. You will also want some thinner and thicker practice pieces as well to experiment with current and wire feed settings.” said Simon Katz, President, Longevity Global Inc.
Start with a piece that is about 3.0 mm thick so that the person will not have to worry about blowing holes through the piece if he lingers a little too long at first. Use a surface grinder to remove as much rust and paint from the practice piece as possible and then clean-up the hard to access corner seams using a Longevity cutting tool. Be sure to also clean up an area away from the welding area to attach the ground clamp.
Holding the Gun
Using two hands to keep the gun steady is possible when a person is doing MIG welding. Although one can do MIG welding one handed if he wants, it is best to use both hands to keep a constant space between the work and the tip. Use the free hand to either support the barrel of the welding gun or the wrist of the hand holding the gun. If possible place the work piece on a surface that will allow him to rest his arm on the surface as well. The more consistent everything is during the welding process the better the finished product will be both mechanically and aesthetically.
Setting up the Welder
Many welders will come with a chart attached to the welder cart that will give him a starting point for the current and wire speed based on the material and the thickness of the piece. If One doesn't have a chart he can start with both settings at 50 percent and adjust as necessary until he is comfortable with penetration depth and fill. The person will definitely want to orient the gun to ensure that he has a clear view of the flame and the welding pool as he welds. Set the gun up so that approximately 1/2" of wire is protruding past the shroud.
Starting the Weld
A welder should first tack weld the pieces together so they don't move while he is welding and he can use both hands then to keep the gun movement smooth and steady. The number of tacks he uses should be determined by the length of the weld but one per foot of weld should be adequate. Once he has all set several things needed to be done almost simultaneously to start the continuous weld. First position the welding gun where he wants to start the weld. Then simultaneously pull the trigger and tilt head forward so that the mask and eye protection fall into place. If he prefers he can hold the gun with one hand and use the other to manually position the face mask instead. It really depends only on the welder's personal preference.
There are a variety of gun movements used in MIG welding. Generally some form of zig-zag or circular weaving motion is used to ensure the arc acts against and penetrates both pieces to be welded.
It's much easier to lay weld onto a sheet of steel than to weld two pieces together, so when a person is first starting it is best to practice his technique that way. Once he has started the weld after a couple of seconds welding a liquid weld pool should develop. Once the pool develops he needs to start moving the weld gun or he will start blowing holes through the work piece. If he moves too fast he will get poor penetration and a weak weld so he should practice until he feels comfortable that he has proper penetration.
Pushing the gun rather than pulling is a good habit to get into as it improves coverage of shielding gas over the weld area. But it has disadvantages as well because the person will have to move the gun over the pool and if he is not careful he'll spend a lot of time on gun and electrode maintenance. This is especially true if he is welding vertically. “Use whatever technique you feel most comfortable with since there really isn't a right or a wrong way to do this.” added Simon.
Spend a little time laying welds on sheet to get a feel for welding on different power settings before trying to join two pieces of metal. Practice laying welds on a single plate until the welds start looking neat. It should only take a couple of hours practice to get a feel for MIG welding and lay down a nice uniform bead.
Evaluating the Weld Bead
A good weld bead will be raised slightly above the work surface and look like a hump and not a mountain range. He should see a progression of equally spaced semi-circles with the hump pointing away from the direction of movement.
To know more about their offerings please visit http://www.longevity-inc.com .
Longevity Global Inc,
23591 Foley St,
Hayward CA 94545