Thisexperiment is conducted to equip learners with two welding techniquesthat they need to know. The first experiment will be performingsimple joining. It will involve using consumable electrode and directcurrent to join the two heads of metal together this is known as arcwelding. The second experiment that will be done will involve using atorch to weld this technique is much more complex than the firstexperiment. The materials used will be acetylene and oxygen as thiscombination is capable of producing a high amount of heat that canjoin thin materials.
Inboth the experiments protective clothing had to be put on: gloves,welding glasses, and an overall. Arc welding is more likely to spoilthe eyes if protective glasses are not worn, as the light producedare always inferred and UV together. Both experiments have thesources of heat with the right temperature to melt the metallicmaterial. In the arc welding as soon as the machine was set on thetwo parts, the electrodes produced a viscous puddle that stuckbetween the two rods that were being joined. We used direct currentof around 110 amps. The electrodes that were used to weld the pipeswere E7018, this shows that the tensile strength was at 70,000 psi.The digit one shows that the electrodes produced puddle thatnecessitated the two materials to stick together.
Oxyacetylenegas welding occurs in the following way: As soon as the flame cameinto contact with the steel, the surface of the steel started to formmolten pool that facilitated the molding to take place. The valve ofthe acetylene tank was slowly open and the pressure regulated to5psi. The acetylene was slowly turned on and ignited and a littlesmoke came off. When the acetylene was increase and oxygen releasedslowly produced a yellow flame that does not burn with a greatintensity. When the acetylene got increased slowly and the oxygenmore rapidly, the flame was very intense and localized. This flame isthe right flame for welding as the heat is enough to melt and joinmetallic materials. When the flame was brought upon the surface, theflame became brilliant sparking off iron fillings that were orangebefore cooling off. The metallic surfaces that were heated formed amolten pool and they were joined together to form a single continuouspiece.
Weldingrequires a lot of care and keenness, it is important that thematerials used are handled with care to avoid accidents. Electrodesthat are produced during welding are responsible for smooth surfacesand even edges after welding penetration control as the fire can bebrought closer or further away for the best effect. The coating thatis created is tough and strong and the rate of deposition very high.In the oxyacetylene flames, the temperatures of the flame are veryhigh and the heat content is adequate. Because of the high intensityof the heat, this kind of welding approach is used for soldering,torch brazing and any other operation that requires hightemperatures. The color of the flame is purple at the tip, white atthe very center and bluish-white near the torch. This kind of flameshows a high intensity of heat that is around 5000 degreesFahrenheit.