Forehand and backhand welding are the most basic of all welding techniques. They are simple, have their purpose and provide a specific type of weld when used properly. In this article you will learn why these techniques are used and most importantly why.
Forehand is a technique where the welder pushes the puddle and keeps the arc slightly ahead of the puddle. Forehand welding is done with the MIG gun pointed in the direction of travel. For example, if the welder will be welding from right to left, then the MIG gun will point toward the left at all times. The angle that the MIG gun is pointed toward the direction travel can vary. The angle of the MIG gun can be anywhere between 5 degrees to as much as 35 degrees toward the direction of travel. When traveling forehand the welder must focus on keeping the arc slightly ahead of the puddle.
The backhand technique is the exact opposite of the forehand welding technique. In the case of back hand welding the welder keeps the MIG gun pointed toward the weld while traveling away from it. For example if the welder is welding from left to right then the MIG gun will be pointed toward the left. The angle of the MIG gun can vary between 5 degrees to 35 degrees toward the weld.
Understand the Reasons for these Welding Techniques
These MIG welding techniques do serve a very important purpose. What they do is control the weld shape and the penetration pattern.
Forehand welding is the most commonly used technique for MIG welding. What the forehand method does is produce a shallow but wide penetrating weld that is flat in appearance. This is the type of weld and penetration is used for most weld joints where overheating is not an issue.
Backhand welding is the least used welding technique when it comes to MIG. This technique produces the deep and narrow type of penetration that is best suited for thinner metals. The advantage of backhand welding is that the arc is focused onto the filler metal and that means extra material to prevent burn through. When welding thinner metals you always run the risk of burning a hole through the weld joint. With the backhand method the extra filler metal at the arc helps prevent this and at the same time can keep warp age to a minimum.