Page 22 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 04: Setting of Oxy - Acetylene and make straight
cuts (free hand)

Objectives

At the end of this exercise you shall be able to
• set the work piece for a straight cutting
• adjust the gas cutting flame
• gas cut along a straight line by hand
• observe safety while cutting with gas
• clean and inspect the gas cut surface.

Job Sequence

• Wear complete safety apparel.
• Set the gas welding plant with a cutting blowpipe.
• Attach the correct nozzle according to the thickness of the metal.

• Adjust the gas pressure of acetylene and cutting oxygen according to the thickness of the metal and the cutting
nozzle.
• Clean the surface to be cut.

• Punch a straight line.
• Adjust proper cutting flame.
• Hold the cutting blowpipe at 900 to the cut line and plate surface.
• Hold at one end of the plate on the punch line up to cherry red hot.

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