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Proper Procedures for Oxyacetylene Processes 6831.25.

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Presentation on theme: "Proper Procedures for Oxyacetylene Processes 6831.25."— Presentation transcript:

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2 Proper Procedures for Oxyacetylene Processes 6831.25

3 Oxy-fuel Oxy-fuel combines pure oxygen which will not burn until combined with a combustible fuel gas such as acetylene, propylene, or propane

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5 Acetylene Acetylene is the combustible fuel used by most agricultural mechanics

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7 Heat Heat from the oxy-fuel process is used to cut or weld and to heat for bending, shaping and tempering metal

8 Safety Use soapy water to check lines, valves, and soft plugs for leaks

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10 Safety Acetylene pressure should NOT be more than 15 pounds per square inch (psi)

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12 Safety The acetylene cylinder tank valve should be opened ¼ to ½ turn for use

13 Safety Oxygen and acetylene tanks should be upright and chained when transported

14 Safety Caps on tanks should be screwed on

15 Safety When the oxyacetylene unit is NOT in use, the regulator adjusting screw should be screwed out all the way until it is loose

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17 Safety Oxygen and acetylene tanks should be upright and chained when transported

18 Safety Use only a spark lighter (torch lighter) to light a torch

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20 Safety Do not use cigarette lighter or matches to light torch or to check for leaks

21 Types of Flames When first lit, the flame has excess acetylene and is a carbonizing flame

22 Types of Flames Oxygen is added to produce a neutral flame used for heating, cutting and welding

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24 Types of Flames Adding extra oxygen makes an oxidizing flame which is the hottest flame used for special applications

25 Welding Tips Welding tips have only one orifice (hole) where oxygen and acetylene combine to make the flame at the tip

26 Cutting Torch Cutting torch has an oxygen-cutting lever, to blow metal from the cut and a tip with more than one orifice (hole)

27 Cutting Torch The center hole is the cutting orifice, and the holes around the center hole are the preheat orifices

28 Hand Tightened When cutting and welding tips are attached to the torch body, they should be hand tightened

29 Torch Lighter The safe way to light either the welding or the cutting torch is to use a torch lighter, NOT a match or a cigarette lighter

30 Backfire Touching the tip to metal when cutting may cause backfire

31 Tip Cleaners Tip cleaners are used to remove metal spatter from the holes in cutting and welding tips Use right size

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33 Puddle Width A uniform puddle width usually indicates correct oxyacetylene welding speed and correct torch height

34 90 degrees The correct angle between the torch tip and metal to cut thick metal with the oxyacetylene torch is 90 degrees

35 Correct Cut A correct cut with the oxyacetylene cutting torch will have a square top and bottom edge and slightly curved drag lines

36 Rough Cut If speed is too fast, oxygen pressure too low or too high, or too much acetylene is used, the cut will be rough

37 Proper Procedures for Oxyacetylene Processes 6831.25


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