Hello. recently i had to take an aluminum alloy motorcycle part to a welding shop. that part was cracked and i needed to get it repaired. the shop where i brought it said that they can't weld it since they have only an arc welding facility. if they do, it would melt the workpiece. so i brought it to another place and they did a perfect job. they used TIG welding for that. i have a very basic knowledge in Arc, TIG and MIG welding methods. i have a few questions,
1) What is the main reason behind using TIG welding to weld aluminum alloys? is that the heat where it generates very low heat (just a guess) so the aluminum won't melt ? as we know an aluminum alloy has a low melting point compared to steel. did a bit of research and it seems that it needs more heat to cope with the aluminum oxide. but how TIG manages it without melting the workpiece?
2) the welder took one thick wire from the welding machine which had a big crocodile clip at the end and connected it to the workpiece before the welding process begins. so i guess it was the negative or positive side of the circuit. got to know that they use a low voltage and high current for welding. he was wearing rubber gloves and rubber shoes. do they do it for safety ? i mean can the arc goes through our body and harm us. apparently the welder was not a part of that circuit.
thank you very much
1) What is the main reason behind using TIG welding to weld aluminum alloys? is that the heat where it generates very low heat (just a guess) so the aluminum won't melt ? as we know an aluminum alloy has a low melting point compared to steel. did a bit of research and it seems that it needs more heat to cope with the aluminum oxide. but how TIG manages it without melting the workpiece?
2) the welder took one thick wire from the welding machine which had a big crocodile clip at the end and connected it to the workpiece before the welding process begins. so i guess it was the negative or positive side of the circuit. got to know that they use a low voltage and high current for welding. he was wearing rubber gloves and rubber shoes. do they do it for safety ? i mean can the arc goes through our body and harm us. apparently the welder was not a part of that circuit.
thank you very much