WELDING BASICS FOR BEGINNER Part-1
Most of the Welding process utilises heat and or pressure for making a weld joint. Based on the method of heat generation and its application the welding process can be grouped into six main classes. Under most of these classes, there are a number of welding processes with special characteristics and fields of applications. the figure shows all significant welding and allied processes, used in the plant sector. Factors for Arc Welding: Arc Length Current Setting Correct Welding Angle Correct Travel Speed What is Arc Length ? Distance between the tip of an electrode & workpiece Types of Arc Length: Standard -3 mm Short-Less than 3 mm Long-more than 3mm Advantages of Standard & Short-Arc Length: Good Weld Joint Good Penetration Max. Strength Less chance of porosity Maximum ductility Less or no oxidation Correct Current: If very high: The electrode melts...