Construction Of Welding Machine

CHAPTER FIVE
5.0    MATERIAL SELECTION AND FABRICATION OF WELDING MACHINE
    The selection of materials for the fabrication seem like a very complicated process for engineers. In making good selection of material there are some factor to be consider which are:
    Material properties: The expected level of performance form the material
    Material cost and availability: material must be priced appropriately and the material must be readily available or abundant in nature to use.
    Processing: must consider how to make the part either casting, machining or welding
    Environmental reaction: Reaction between material and its environment, must be favourable.
5.1    FABRICATION OF WELDING MACHINE
    Fabrication of welding is the construction of a transformer and the casing majorly. The transformer consist of two coils with a coupled. When in operation, a laminated steel core and a transformer insulator which is insulated, the laminated steel core from the winding coil.
    The coil made of copper of a conductor and the dimension 1965mm2 and the wire used as the primary coil and it is wound four various selection for 240 turns. The core is constructed of an insulation (lead rod) and laminated shell steel wire assemble to provide a continuous magnetic part will minimum air gap. The thickness of the core drive the advantage of minimizing easy current loss.
    The casing which is the outer cover that enclose all the remaining inside component, it is made of mild iron shell of gauge which is powerful enough to carry the weight of the total machine.
5.2    TRANSFORMER
    A transformer can be defined as a static derive which helps in the transformation of electric power in one circuit to electric power of the same frequency in another circuit. The voltage can be raised or lowered in a circuit but with a proportional increase or decrease in the current ratings.
    A medium size transformer has a full-load efficiency of 97-98% so that the loss at each point of transform is very small.
    Also, since it is static there are no moving parts, the amount of supervision required is practically negligible. Housing was said to have discovered the use of transformer as welding power source.