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Types of welding joints

Types of welding joints

There are five basic types of weld joints:

  • Butt Joint: It is a joint between two materials lying in same plane. They are further of two types: a square butt joint( to join light sheet metals ) , a beveled butt joint( to join heavier pieces of metals)
  • Lap joint: It is a joint between two overlapping materials. Most commonly used in resistance spot welding, laser beam welding, and electron beam welding. A lap joint can be weld from one side, two sides. A lap joint weld on two sides gives more strength.
  • Corner joint: It is a joint between two materials placed at right angle to each other. For welding light sheets of metal , where strength is not required use a closed corner joint whereas, welding done on one side of heavier metal , use a half corner joint.
  • T joint: It is a joint between two materials placed at right angle in the form of T, the surface of metals are not in the same plane. The metals can be joined like plain tee, single beveled , double beveled, single J, double J.
  • Edge joint: It is a joint between the edges of two or more collateral or nearly equidistant It is not a very strong joint. It is mostly used to join edges of sheet metal, mufflers etc.



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