Principle of produced heat by arc properties in VPPA of aluminum alloy

The paper studied principle of arc produced heat in VPPA and analysed how welding parameters influence arc heat from physical properties of arc on Al alloy.It is shown that dissymmetrical electrode properties have great influence on produced heat of arc in positive and negative times.When Al alloy is used to be negative electrode, negative voltage produced more heat.Different parameters of welding current and lasting times are very important factors to produce heat in positive and negative times