Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...perpendicular to the work. In welding the torch should not be directed upon a particular spot for any great length of time, but should move slightly so that the flame will come in contact with other parts in the immediate vicinity. This shouldnot be understood to mean that the torch should sweep a circle whose diameter is one or two inches. Most beginners make this mistake. The torch should be moved not more than 1/4. or 5/16 of an inch at a time for average work--say %" or 1/2" in thickness. A circular motion for metal of this thickness is not essential, but it is well to acquire it. For sheet metal work this circular movement is very desirable, producing a very smooth and pretty weld. However, there are some that prefer an oscillatory movement, the torch being pushed like a pendulum from one side of the sheet to the other while advancing in a forward.direction. So far we have not referred to the welding rod. It should be held in the free hand. Instead of using a straight rod, it will be found more convenient for the welder to use a rod having an angle of 90 degrees. In steel this is formed by simply bending over 3 or 4 inches of the end and continuing to do this as the rod is used up. For cast iron, we hold the end of one rod in the middle of another and "tack" the two with the torch. The size of the welding rod is important and should be proportional to the thickness of the metal welded. Most beginners make the fatal mistake of not getting the metal to be welded hot enough before adding the.filler rod. It is a good plan in beginning a weld to forget that you have a filler rod. Get the casting hot and then start the metal to flowing together at the bottom of the bevel. Not until then should the filler be used. The...
