Oxyfuel Cutting - PowerPoint PPT Presentation

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Oxyfuel Cutting

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Title: Slag Stream Author: swangsgard Last modified by: tbevan Created Date: 9/30/2004 12:49:47 AM Document presentation format: On-screen Show Company – PowerPoint PPT presentation

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Title: Oxyfuel Cutting


1
Oxyfuel Cutting
  • Chapter 14

2
Objectives
  • Identify the various components of an oxyfuel
    cutting outfit.
  • Cite the maximum safe working pressure used for
    acetylene gas.

3
Objectives
  • Describe the function of each component of an gas
    cutting outfit.
  • Correctly select the proper cutting tip and
    working pressure for a particular thickness of
    steel.
  • Distinguish between a well cut surface and a
    poorly cut surface and be able to adjust where
    necessary to perform a good cut.

4
Cutting Torch
5
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6
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7
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8
Oxygen control
  • Velocity
  • Oxygen pressure
  • Amount of oxygen
  • Orifice size

9
Torch movement
  • Away from welder not toward
  • No side to side is needed

10
Right to left or left to right?
  • Right to left best for right-handed welders
  • Whatever is most comfortable
  • left to right best for left-handed welders

11
Cutting Angle
  • Thin
  • 1/8 or less
  • Use a small tip
  • Slant tip to 15-20
  • Thick
  • Perpendicular both ways
  • Use a larger tip

12
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13
Slag Stream
  • Less then 1 should go directly through
  • Thicker then 1 some drag is desirable
  • To ensure proper oxygen consumption

14
Drag
  • The distance between the entry and exit point of
    the oxygen jet

15
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16
Causes of Excessive Drag
  • Incorrect flame adjustment
  • Oxygen cutting pressure low
  • Traveling too fast

17
Effect of Excessive Drag
  • Not cutting completely through the metal
  • Cerates turbulence and makes kerf rough

18
Bell-mouthed kerf
  • Too much oxygen cerates a bell-mouthed kerf

19
Piercing
  • Requires more heat
  • Use 1 size larger tip
  • Metal must be heated completely though

20
Cut Quality
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