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  • TIG, Tungsten inert Gas, where the Tungsten is the material of which the electrode is

  • made of and the Inert gas is the gas coming out of the torch's nozzle, commonly Argon.

  • The lens, the pink piece at the end of the gun that add a much needed feminine touch

  • to an overly masculine design, can have different shapes and it affects the way the gas is dispensed

  • onto the weld and the amount needed to shield it properly.

  • Here's how it works: the electrode is charged with enough voltage to create an arch with

  • the part and enough amperage to create the heat necessary to melt the parts that need

  • to be welded together.

  • Once you have created a little pool of molten metal we can start adding the metal filler

  • to fill up the space between the two parts and strengthen the joint. You do need to get

  • into the right rhythm, you add the filler and you spread it with the torch. If you get

  • it right you'll get the sought after stacked coin look, typical of this welding technique.

  • To join two thicker pieces it is ideal to bevel the edges to form a v shaped gap between

  • the pieces to ensure a deep penetration of the weld. If needed more passages can be overlapped

  • to achieve full filling of the gap.

  • But why the gas you might ask, well the inert gas is there to protect the molten metal from

  • contacting the oxygen that would cause oxidation and result into a weak weld.

  • An AC DC TIG welder is best suited for aluminum welding

  • when exposed to oxygen the Aluminium forms an oxide layer

  • that melts at a much higher temperature than the aluminum itself

  • 3600 degrees Fahrenheit vs the 1200 degrees Fahrenheit of the base material.

  • To solve this problem AC welding has two cycles: during the first cycle, called EP or Electropositive,

  • where current flows from the workpiece to the electrode, the aluminum oxide is blasted

  • off the surface, creating a clean area. during the second cycle, called EM or Electron

  • Negative, where the current flows from the electrode to the work, the arch produces enough

  • heat to melt the clean aluminum and fuse the joint.

  • The two cycles combine the cleaning stage to the welding one.

  • Let's take a look at a couple of controls we can find on a TIG welder

  • The pulser allows the operator to keep the temperature of the work piece in check alternating

  • between two amperage values, the maximum and the minimum.

  • He can decide the frequency of the switches... and the percentage of the time of one phase

  • over the other. All this to try to keep the work piece at

  • the ideal temperature.

  • Then we have the post flow settings, it determines for how many seconds the flow of gas will

  • remain active after the arch is shut off. This is done so that the weld can be protected

  • from oxygen contamination long enough for it to cool off.

TIG, Tungsten inert Gas, where the Tungsten is the material of which the electrode is

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アルミニウムへのTIG溶接はどのように機能するのか - チュートリアルDIY - 05 - RCBクイックチュートリアル (How does TIG welding work on aluminium - Tutorial DIY - 05 - RCB quick tutorial)

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    hk93222 に公開 2021 年 01 月 14 日
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