DOING WELDING, THERMAL CUTTING AND WARMING DOINGY-ACETYLENE WELDING AND DOT WELDING BODY OTOMOTIF (F-022) SK – KD 01
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
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 Teknologi dan Rekayasa
BASE THEORY OF OXY-ACETYLENE Oxy-Acetetylene welding MIXED WITH CERTAIN COMPARISON Oxygen Flame Acetylene Teknologi dan Rekayasa
ACETELYNE Acetylene is a chromatic gas Very is smelling ( smelling sharply) Have hydrogen composition ( 7,7%) and carbon (92,3%) Teknologi dan Rekayasa
ACETELYNE EASY TO BURST at 15 psi (1,05 kg/cm2) Keep from copper, and silver of mercury, because can burst back Teknologi dan Rekayasa
OXYGEN Oxygen keeping in tube Pressure of O2 in tube 2000 psi - 2640 psig (13790 kPa - 18202 kPa) lower temperature from - 297oF (- 183oC) oxygen remain to melt temperature - 297oF (- 183oC) happened process evaporation of O2 back Teknologi dan Rekayasa
REACTION CHEMISTRY By theory C2H2 + 2,5O2 → 2CO2 + H2O Reality 2 CO + ¾ H2 + 1,5 O2 → 2 CO2 + H2O Teknologi dan Rekayasa
THE FLAME SHARP Teknologi dan Rekayasa
Kinds of Flame Teknologi dan Rekayasa
Kinds of Flame Teknologi dan Rekayasa Flame Carburazing Oxidation Neutral Teknologi dan Rekayasa
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 Teknologi dan Rekayasa
Form carburazing flame Kinds of Flame Form carburazing flame back Teknologi dan Rekayasa
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 Teknologi dan Rekayasa
Kinds of Flame Form oxidation flame back Teknologi dan Rekayasa
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. Teknologi dan Rekayasa
Kinds of Flame Sharp of Neutral Flame back Teknologi dan Rekayasa
PERALATAN LAS OKSIASITELIN 1. Generator 5. Manometer 2. Acetylene Tube Acetylene hose and oxygen 3. Oksigen Tube 7. Brander 4. Regulator Teknologi dan Rekayasa
EQUIPMENTS OF OXY-ACETYLENE 1. Generator used to produce gas of acetylene with calcium carbide reacted by water back Teknologi dan Rekayasa
EQUIPMENTS OF OXY-ACETYLENE 2. Acetylene Tube Accommodating gas of acetylene back Teknologi dan Rekayasa
EQUIPMENTS OF OXY-ACETYLENE 3. Tabung Oksigen The high pressure Oxygen very easy react with oil , so the equipments may not lubricate back Teknologi dan Rekayasa
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 back Teknologi dan Rekayasa
EQUIPMENTS OF OXY-ACETYLENE 5. Manometer Manometer is a equipment to measure gas pressure that entrance to regulator back Teknologi dan Rekayasa
EQUIPMENTS OF OXY-ACETYLENE Acetylene Hose and oxygen suggested to wear capacities 28 kg / cm2 back Teknologi dan Rekayasa
EQUIPMENTS OF OXY-ACETYLENE 7. Brander Function to mixture oxygen with acetylene and burn it Teknologi dan Rekayasa
EQUIPMENTS OF OXY-ACETYLENE back Teknologi dan Rekayasa
TECHNIQUE OSCILLATION of NOZZLE Circle Oscillation Zig-zag oscillation TRAPEZIUM Oscillation Teknologi dan Rekayasa
TECHNIQUE OSCILLATION of NOZZLE “l ” Oscillation “l ” Oscillation “e ” Oscillation “e ” Oscillation “i ” Oscillation “i ” Oscillation Teknologi dan Rekayasa