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

2. Sara $ Issa 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. Welding safety

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

4. 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

5. Sara $ Issa Welding Processes and Materials

6. Sara $ Issa Weld terminology

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

8. Sara $ Issa GAS WELDING

9. Sara $ Issa Equipments for gas welding

10. Sara $ Issa Cylinder and Cylinder Valve

11. Sara $ Issa Regulator Setting

12. Sara $ Issa Connecting Hoses

13. Sara $ Issa Continues…

14. Sara $ Issa Attaching The Weld Torch

15. Sara $ Issa Attaching The Weld Torch( Continues)

16. Sara $ Issa Opening The Gas Knob

17. Sara $ Issa Igniting the Torch Using Striker

18. Sara $ Issa Gas Flame

19. Sara $ Issa Types Of Oxy-Acetylene Gas Flames

20. Sara $ Issa Gas Flame Zones

21. Sara $ Issa Gas Welding Equipments

22. Sara $ Issa Gas Welding Torch

23. Sara $ Issa Continues…

24. 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.

25. Sara $ Issa Continues…

26. Sara $ Issa Gas Cutter Tip

27. Sara $ Issa ARC WELDING

28. 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

29. 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.

30. Sara $ Issa Metal Arc Welding Procedure

31. Sara $ Issa 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)

32. Sara $ Issa Comparison Arc weldingGas 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

33. Sara $ Issa THE END