The design and construction of an arc welding machine
Table Of Contents
- Title page/approval pageCertificationDedicationAcknowledgementAbstractTable of contentCHAPTER ONE1.0 Introduction1.1 Aims/objective1.2 Scope or Limitation1.3 Definition of TermsCHAPTER TWO2.0 Literature Review2.1 Transformer Design2.2 Coil Design2.3 Core Design2.4 Equivalent Circuit of the Machine2.5 Machine Design2.6 Operation of Machine2.7 Leakage flux Reduction2.8 Specification from DesignCHAPTER THREE3.0 Construction3.1 Lamination3.2 Transformer former3.3 Copper coil3.4 Insulating Materials3.5 Methodology3.6 Casing3.7 Coupling3.8 Electrical HolderCHAPTER FOUR4.0 Testing and Finding4.1 Open-Circuit Test4.2 Short-Circuit Test4.3 Test Analysis4.4 Conditions for Operation4.5 Cost AnalysisCHAPTER FIVE5.0 Conclusion5.1 RecommendationREFERENCES
Thesis Abstract
The machine is designed to serve with an output of 250A. it has two pats which are the primary and secondary parts. The primary part, through which voltage is supplied to the machine has 180 turns which is made of 2mm2 S.W.G 14 copper coil. The secondary part has 45 turns made of 4mm2 S.W.G 8 copper coil.
Both turns are wound on separate limb of the laminated core. The voltage from primary turns flows to the secondary turn by induction.
The machine contain a power switch through which the machine can be switched on or off when connected to the power source. The indication light simply shows when the machine is on or off which is equally controlled by the power switch.
The fan connected to the machine helps in the looking of the temperature of the machine, it gets started once the machine is on.
The welding current is adjusted by varying the spacing between the primary and secondary windings when the cranks is rotated, clockwise the insulating block between the two winding moves down, the magnetic flux leakage and the inductive impedance are increased, thereby reducing the welding current in the secondary windings. Also as the insulating block is moved upward, away between the two turns, the magnetic flux leakage and the inductive impedance are brought down, causing the welding current to rise.
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