Welding is an important part of most restorations, whether you do it yourself or have it done by a shop. Knowing a good weld from a bad one is very important! A good weld has a nice even bead. The metals are bonded and the filler rod is just there to fill the gap that occurs between the pieces being bonded.
There are three types of welding, oxy/acetylene, TIG and MIG. All three will produce a good bond if done properly. They all require the same accurate degree of skill. Welding is almost an art form. Having just the right touch will keep the metal flowing smoothly.
Over the years I have seen examples of both good and bad welds. One good one was done using coat hanger wire. Although not the best rod to use due to the coating in the wire, it made a good bond.
A welder has to be aware of the area surround their work. In one case there was a wood frame behind the area to be patched. So much for the wood, gone!
A welder who should have known better tack braised a piece in place using a brass rod. Steel does not mix well with brass. The dissimilar metals can cause corrosion in the weld. Not a lasting bond.
During the Club arranged "Introduction to body work" course at SAIT we were given the chance to try the different methods. The process is not difficult but does require practice.
Finding a good instructor is a great help. It is easy to burn two pieces of metal together, but to get a good bond it has to withstand a torture test, bending. If the bond holds you have a good weld. If it breaks, you still have more practice ahead of you. Be careful not to burn yourself. Wear a good darkening helmet and gloves. A leather apron will also protect your clothing. I know you see pictures of people not wearing any of this gear however you would rather be safe than sorry.
Sid Gough - Technical Editor
