While thinking about welding we might have a wrong perception that there is just one technique in this but the actual fact is that these are many methods that are followed for each and every need. Some of the different types of welding methods are TIG Welding, MIG Welding, AC / DC Welding, ARC Welding, Gas Welding, Stick Welding, Spot Welding and Aluminium Welding. All the above categories have different uses and fields of specialization for which they are meant for. Each of the above categories has a separate technique and will have a different type of bonds being created between the metals pieces that are joined. Just as the technique varies, the welding machine that is use for all the above methods differs.