Welding Basics
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The first thing that will be discussed it the different Joints then the different positions. There are 5 basic types of Joints there is the Butt Joint, Corner Joint, T-Joint, Lap Joint, and the Edge Joint. Some of the Joints might include a Bevel with or without a Land (Root Face). Another thing that must be defined to describe any joint would be the type of welding position. The different welding positions are: Flat, Horizontal, Vertical and Overhead. Each will also indicate whether it is a groove, fillet, etc.
When you get ready to weld on a part it is important to make sure the weld size is correct. This can be done by many different methods, I would recommend getting the book Design of Weldments by Omer W. Blodgett. This book is a great resource and can help you in determining the weld sizes that you will need. Also check with any code that you are designing to they may have a pre-determined weld size that you have to use.
The Butt Joint
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Butt Joint Configurations
The Butt Joint is a common joint that is usually seen with a Bevel and a Land. The Joint can have the pieces placed flush against each other, but more commonly has a root opening. There are many different types of Butt Joints which are: Square, Single Bevel, Double Bevel, Single-V, Double Bevel, Closed Square, Single-J, Double-J, Single-U, and the Double-U.
The Joint is welded in all the different positions and is almost always labeled as a groove weld. It is commonly used in the pipe and sheet metal industries.
The Joint is welded in all the different positions and is almost always labeled as a groove weld. It is commonly used in the pipe and sheet metal industries.
The Corner Joint
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The Corner Joint is where the two pieces form a V or L-shape. The weld will be performed on the outside edge of the piece. This is used often in the sheet metal industry. The T-Joint is also welded in all the different positions.
The T-Joint
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The T-Joint is where the 2 pieces come together to form a T-shape. This joint is a very common joint and is considered to be a fillet type joint. The weld is performed on the inside of the T-joint. It sometimes will have a Beveled edge. This joint can have a single Fillet, Double Fillet and a Single Bevel.
The Lap Joint
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The Lap Joint is when you have to members actually lapping over each other. This type of joint can have a Slot or Plug Weld, Fillet Weld or a Resistance Weld performed. This type of joint is used regularly in the sheet metal industry.
The Edge Joint
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The Edge Joint is where to members are placed side by side and welded on the edge.