oxy fuel cutting





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Published on Feb 22, 2007

This is me cutting an approximate 35 degree bevel on some 3/8" carbon steel plate.

I assembled the trolly guide from some off the shelf "Flange wizard" brand components it is composed of two Chariot Cutting Guide kits to make the trolly. And I used the steel ruler from two 12" combination squares to make the tracks

Oxygen and acetylene can be used to cut and weld ferrous metals like low, medium, and high carbon steels.
(it can also cut titanium which looks very cool i've heard)

When I lit this torch in this video you can see me turn on both oxygen and acetylene before ignition. It keeps the soot down from the air and acetylene flame which is very dirty and has incomplete combustion

After the metal (carbon steel) reaches a certain temperature bright cherry red, I depress the oxygen lever which adds an additional oxygen jet that comes out the center of the cutting tip. This pure oxygen jet actually burns (combusts) the steel. In the process adds more heat to the cutting process and also blows or pushes the steel out of the way.
The molten metal is forced into a "slag" (oxidized steel) stream making a "kerf" or cut in the steel.

The main valve of an oxygen cylinder (CGA 540)
Holds back about 1800-2200psi, a regulator controls and reduces the pressure and flow being supplied by the oxygen cylinder. Pressures can typically be increased or decreased you adjusting a T handle screw on the front of the regulator. The correct pressure is determined by the cutting tip manufacture "Victor" brand cutting tips can cut from
1/8 inch -- 12 inch steel by changing the tip size, and using the appropriate pressure.
This is principle is similar with the fuel just at a lower pressure, 225psi approximately (CGA 510)

This process of cutting steel can be dated back to the late 1800's


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