Advantages and disadvantages of spot welding
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Joining two pieces of metal together by spot welding can be quick and efficient, but the resulting join will not be adequate for all purposes. It can be weak or deformed, particularly if the method is not used correctly. Spot welding basically joins two pieces of metal using the heat from an electric current. The two pieces of metal are pressed together with electrodes on either side. The electrodes are connected via a small spot. The current must be applied for the correct amount of time in order to get a strong join. The exact timing will depend on the types and thickness of metals being joined.
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