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What is the difference between seam welding and spot welding?

What is the difference between seam welding and spot welding?

A seam weld is a continuous weld along a joint. Unlike a spot weld that uses a single point electrode, a seam weld uses a rotating wheel electrode that produces a rolling resistance weld. This process is most often used to join two sheets of metal. MIG and TIG welders can be used to do seam welding.

Which type of electrodes are used in seam welding process?

Like spot welding, seam welding relies on two electrodes, usually made from copper, to apply pressure and current. The electrodes are often disc shaped and rotate as the material passes between them. This allows the electrodes to stay in constant contact with the material to make long continuous welds.

What electrode is commonly used in spot welding?

copper
Electrode materials typically used for spot welding copper include molybdenum and tungsten.

How are spot and seam welds similar?

Seam and spot weld are similar in many ways. They both make individual welds with the same basic process of squeeze, weld and hold. The heating principal is the same “Ohm’s Law” H = I2 rt. The electrodes are different.

What is seam welding used for?

Resistance seam welding can be used to make gas- or fluid-tight joints in a variety of sheet metal fabrications. Steel fuel tanks for motor vehicles are a prime example. It is also used in making tin cans, steel drums and domestic radiators.

What is the seam welding?

Seam welding is the joining of work pieces made of similar or dissimilar materials along a continuous seam. Seam welding can be broken down into two main techniques, resistance seam welding and friction seam welding.

What are spot and seam welding processes applications?

Why is copper electrode used for spot welding?

The reason copper is used for the electrodes is that it can maintain a high thermal conductivity and has a low electrical resistance compared to most other metals. This guarantees that the heat is created in the work pieces rather than the electrodes.

What is seam welding?

Seam welding is a resistance welding process in which suitably contoured copper electrodes apply pressure to create a region of high resistance between metal sheets. The current passed through this region generates heat due to high electrical resistance. A seam weld is created through fusion.

What are the advantages of spot welding?

Advantages of Spot Welding: This type of welding is a easy process. Spot welding has a high production rate. Spot welding can be applied to different metals to join. Spot welding is a low-cost process.

What is the difference between spot welding and seam welding?

Unlike a spot weld that uses a single point electrode, a seam weld uses a rotating wheel electrode that produces a rolling resistance weld. This process is most often used to join two sheets of metal. MIG and TIG welders can be used to do seam welding. If you need to cover a larger surface area with a stronger weld,…

What is spot welding and how does it work?

Spot welding uses two copper alloy electrodes to concentrate welding currents into a small area, which creates welds at regular intervals on overlapping pieces of metal. When spot welding, you typically use sheets of metal with a thickness of 0.5 to 3 millimeters.

What is seseam welding used for?

Seam welding is most commonly used for projects that require a leak-tight weld or long strings of spot welds. That’s why it’s a good choice for things like boxes, cones, cylinders or any project that needs a continuous weld.

Can you use a TIG welder for seam welding?

MIG and TIG welders can be used to do seam welding. If you need to cover a larger surface area with a stronger weld, you might want to consider using a seam weld. This process can be used to join two sheets of metal together and is ideal if you need a continuous, leak-tight joint.