1. DOING WELDING, THERMAL CUTTING AND WARMING
DOINGY-ACETYLENE WELDING AND DOT WELDING
BODY OTOMOTIF (F-022)
SK – KD 01

2. Purpose learning activity
Student can know kinds of oxy-acetylene flame
Student can know tools oxy-acetylene welding
Student can know the way oxy-acetylene welding
Teknologi dan Rekayasa

3. Welding clasification
Fusion welding
chemistry
Oxy-acetylene
electric
Arc welding
Shielded metal arc welding
Submerged arc welding
Metal inert gas welding
Tungsten inert gas welding
Resistance welding
Dot welding
Seam welding
Pengelasan Padat
Las gesekan
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4. BASE THEORY OF OXY-ACETYLENE
Oxy-Acetetylene welding
MIXED WITH CERTAIN COMPARISON
Oxygen
Flame
Acetylene
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5. ACETELYNE Acetylene is a chromatic gas
Very is smelling ( smelling sharply)
Have hydrogen composition ( 7,7%) and carbon (92,3%)
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6. ACETELYNE EASY TO BURST at 15 psi (1,05 kg/cm2)
Keep from copper, and silver of mercury, because can burst
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7. OXYGEN Oxygen keeping in tube
Pressure of O2 in tube 2000 psi psig (13790 kPa kPa)
lower temperature from - 297oF (- 183oC) oxygen remain to melt
temperature - 297oF (- 183oC) happened process evaporation of O2
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8. REACTION CHEMISTRY By theory C2H2 + 2,5O2 → 2CO2 + H2O Reality
2 CO + ¾ H2 + 1,5 O2 → 2 CO2 + H2O
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9. THE FLAME SHARP
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10. Kinds of Flame
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11. Kinds of Flame Teknologi dan Rekayasa Flame Carburazing Oxidation
Neutral
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12. making by mixture too much acetylene oxygen or less oxygen
Kinds of Flame
Carburazing flame
making by mixture too much acetylene oxygen or less oxygen
Suitableto weld soft steel with low carbon, welding surface some object, brazing, soldering, and alluminium weldeing
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13. Form carburazing flame
Kinds of Flame
Form carburazing flame
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14. Too much oxygen or less acetylene
Kinds of Flame
Oxidation Flame
Too much oxygen or less acetylene
Core Fire becoming sharp and short. fire of Acetylene only just seen, and short fire tongue.
Use in metal cutting
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15. Kinds of Flame
Form oxidation flame
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16. Kinds of Flame Neutral Flame
Making by well-balanced mixture, 1 : 1 between oxygen and acetylene
Don'T have fire of acetylene, [do] not have soot
Can’t weld some material which have sensitive to acetylene or gas oksigen, etc, titanium.
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17. Kinds of Flame
Sharp of Neutral Flame
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18. PERALATAN LAS OKSIASITELIN
1. Generator
5. Manometer
2. Acetylene Tube
Acetylene hose and oxygen
3. Oksigen Tube
7. Brander
4. Regulator
Teknologi dan Rekayasa

19. EQUIPMENTS OF OXY-ACETYLENE
1. Generator
used to produce gas of acetylene with calcium carbide reacted by water
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20. EQUIPMENTS OF OXY-ACETYLENE
2. Acetylene Tube
Accommodating gas of acetylene
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21. EQUIPMENTS OF OXY-ACETYLENE
3. Tabung Oksigen
The high pressure Oxygen very easy react with oil , so the equipments may not lubricate
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22. EQUIPMENTS OF OXY-ACETYLENE
4. Regulator
Acetylene Regulator
Function of Regulator is arrange gas pressure to be relative stabilize moment when weld some object, wether have degradation pressure in Manometer tube
Oxygen Regulator
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23. EQUIPMENTS OF OXY-ACETYLENE
5. Manometer
Manometer is a equipment to measure gas pressure that entrance to regulator
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24. EQUIPMENTS OF OXY-ACETYLENE
Acetylene Hose and oxygen
suggested to wear capacities 28 kg / cm2
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Teknologi dan Rekayasa

25. EQUIPMENTS OF OXY-ACETYLENE
7. Brander
Function to mixture oxygen with acetylene and burn it
Teknologi dan Rekayasa

26. EQUIPMENTS OF OXY-ACETYLENE
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27. TECHNIQUE OSCILLATION of NOZZLE
Circle Oscillation
Zig-zag oscillation
TRAPEZIUM Oscillation
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28. TECHNIQUE OSCILLATION of NOZZLE
“l ” Oscillation
“l ” Oscillation
“e ” Oscillation
“e ” Oscillation
“i ” Oscillation
“i ” Oscillation
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