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FOREHAND WELDING.
-Forehand
(also called "puddle welding" or "ripple welding") is the oldest
method of welding. The rod is kept ahead of the tip in the direction in which the weld is being made. Point the
flame in the direction of the weld, and hold the tip at an angle of about 45 to 60 to the plates (fig. 15-32). This
position of the flame preheats the edges you are welding just ahead of the molten puddle. By moving the tip and
Figure 15-32.-Forehand welding.
Figure 15-33.-Backhand welding. welding rod back and forth in opposite semicircular paths, you balance the heat to melt the end of the rod and the side walls of the joint into a uniformly distributed molten puddle. As the flame passes the rod, it melts off a short length of the rod and adds it to the puddle. The motion of the torch distributes the molten metal evenly to both edges of the joint and to the molten puddle. This method is used in welding most of the lighter tubing and sheet metals up to 1/8 inch thick because it permits better control of a small puddle and results in a smoother weld. The forehand technique is not the best method for welding heavy metals. |
 
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