Nizwa College of Technology الكلية التقنية بنزوى Nizwa College of Technology Mechanical Engineering Department welding Done by: Saravanan & Issa AL-Tobi Sara $ Issa

Welding safety Before starting actual arc welding the student should be fully aware of the dangers involved. The high temperature arc, hot metal and ultra violet radiations which can cause severe eye irritation and burns. So students should follow the safety rules very strictly. Sara $ Issa

Definition of welding “joining of metals by application of heat and/or pressure, with or without the addition of filler metals” Sara $ Issa

Types of Welding Gas welding Arc welding Resistance welding Tungsten inert gas welding Metal inert gas welding Projection welding Submerged arc welding Electro slag welding Sara $ Issa

Welding Processes and Materials Sara $ Issa

Weld terminology Sara $ Issa

Types of weld (joint) Butt weld Fillet weld Corner weld Pipe weld Lap weld Sara $ Issa

GAS WELDING Sara $ Issa

Equipments for gas welding Sara $ Issa

Cylinder and Cylinder Valve Sara $ Issa

Regulator Setting Sara $ Issa

Connecting Hoses Sara $ Issa

Continues… Sara $ Issa

Attaching The Weld Torch Sara $ Issa

Attaching The Weld Torch( Continues) Sara $ Issa

Opening The Gas Knob Sara $ Issa

Igniting the Torch Using Striker Sara $ Issa

Gas Flame Sara $ Issa

Types Of Oxy-Acetylene Gas Flames Sara $ Issa

Gas Flame Zones Sara $ Issa

Gas Welding Equipments Sara $ Issa

Gas Welding Torch Sara $ Issa

Continues… Sara $ Issa

Gas cutting By changing the weld torch with a gas cutting torch same set up can be used for cutting thick metal plates as shown below. Sara $ Issa

Continues… Sara $ Issa

Gas Cutter Tip Sara $ Issa

ARC WELDING Sara $ Issa

Arc Welding This is the welding process where required heat is obtained from the electric arc produced between the electrode and the work piece metal. Types Manual metal arc welding(stick welding) TIG welding MIG welding SAW welding Sara $ Issa

Equipments of Arc Welding Creates a thick weld, using a metal rod covered with flux which is called consumable electrode. AC/DC Transformer is the important equipment Electrode holder, wire brush, chip hammer. Sara $ Issa

Metal Arc Welding Procedure Sara $ Issa

There are two types of electrode Electrodes There are two types of electrode Consumable electrode (electrode melt and becomes part of the weld) Non-consumable electrode (electrode does not melt and creates only the arc) Sara $ Issa

Comparison Arc welding Gas welding -Heat is more -Electrical power is the source of energy -We use flux coated electrodes -Suitable for welding steel -Heat is less -Chemical reaction between gases is the source of energy -We use filler rods -Suitable for welding copper and brass Sara $ Issa

THE END Sara $ Issa