What is spot welding and techniques involved
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What is spot welding and techniques involved

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Spot welding is processes by two metal surfaces are joined together by welding at particular spots. These surfaces are joined with the help of the heat that is generated by the resistance to the flow ...

Spot welding is processes by two metal surfaces are joined together by welding at particular spots. These surfaces are joined with the help of the heat that is generated by the resistance to the flow of current.

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  • Spot welding helps to save energy as copper is a good conductor and it does not generate any resistance which is essential during spot welding. Thanks for sharing valuable information on spot welding.
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What is spot welding and techniques involved Document Transcript

  • 1. What is Spot Welding and Techniques Involved?Spot welding is processes by two metal surfaces are joined together by welding at particularspots. These surfaces are joined with the help of the heat that is generated by the resistance tothe flow of current. Two copper alloy electrodes that are shaped are used to concentrate thewelding to a single spot. This reduces the area of weld on the joint. A large amount of current isconcentrated to a small spot on the metal. The metal will offer resistance to the flow of currentand generate tremendous amount of heat. These heats will meltdown the metal on theconcentric spots and this will form the weld on the metal. The most attractive part about spotwelding is that a lot of energy can be saved by just concentrating all the energy on one spot.Not only will this help save energy, but this will also help in reducing the excessive heating onother parts of the metal sheet.The amount of energy that is delivered will be directly proportional to the resistance of themetal to the flow of current. If you apply too little energy, it will therefore make a poor weld.Applying too much energy would also cause excessive melting and defeat the purpose of spotwelding. Therefore, it is very necessary that for spot welding you apply the exact amount ofenergy needed. Most of the time, the amount of energy required will be according to the metalthat is used. This is because different metals will have different values of resistance to theflowing current. The amount of energy that is generated for a given value of flowing currentthrough a metal is different for every metal. Therefore, these values must be known for themetal to calculate the optimum amount of current that can be used for the metal.Spot welding can be used in large or small applications. When resizing molar bands, a smallsized spot welding machine is used to create small spot welds. This works as a quick fix, whichis where spot welds are used in most situations. To provide small quick fixes rather than largeelaborate fixtures thereby saving on space resource and energy. Stop welding is most effectiveon sheet metals. These types of metals can be quickly spot welded owing to their thin
  • 2. structure. A stock metal that is thicker would be harder to join together through spot weldingbecause the heat would more easily spread throughout the metal. For the spot welding to bemost effective, all the energy has to be concentrated on one spot as much as possible.Therefore, any distribution of energy or the electric current would cause a loss in the efficiencyof the spot weld. There is different spot welding equipment available in the market. Thedifferent spot welding equipment have different features that make use of this amazingtechnique to provide quick fixes. Therefore, you can purchase such equipment online to makesure that you can carry out your welding activities proficiently.Source: http://www.everlastgenerators.com