PPT PRESENTATION OF WELDING

ITS WELDING PRESENTATION ABOUT SIMPLEX

1. welcome

2. Bharti College Of Engineering & Technology A Vocational Training Presentation on “Welding” From “SIMPLEX CASTING LTD. ( UNIT-III)” BY SURENDRA KUMAR (Department Of Mechanical Engineering)

3. SIMPLEX CASTING Ltd UNIT-III 223/2,224 TEDESARA,INDUSTURIAL,MUDIPAR ROAD INTRODUCTION It is a fabrication department of simplex or deportment of production. Internal planning for sequence of manufacturing of the job. Then cutting and fitting and welding then finishing

4. Contents: Welding Types of Welding Gas Welding(Oxy- Acetylene) Arc Welding(Metal Arc) Merits & Limitations of Welding Process Application Conclusion

5. Welding: The Welding is a process of joining two or more, similar or dissimilar metals by heating them to a suitable temperature , with or without the application of pressure, filler materials and flux. Welding is used for making permanent joints.

6. TYPES OF WELDING : Plastic Welding or Pressure Welding: The piece of metal to be joined are heated to a plastic state and forced together by external pressure ( Ex) -Resistance welding Fusion Welding or Non-Pressure Welding: The material at the joint is heated to a molten state and allowed to solidify ( Ex )- Gas welding, Arc welding

7. CLASSIFICATION OF WELDING PROCESSES: Gas welding(Oxy- Acetylene) Arc welding(Metal Arc) Resistance welding Solid state welding Thermo-chemical welding Low Temperature welding

8. Gas Welding: Gas Welding is a fusion welding process, in which the heat for welding is obtained by the combustion of oxygen and fuel the gas may be acetylene ,hydrogen or propene . Types: Oxy- Acetylene Air -Acetylene Oxy-Hydrogen Oxy-Fuel

9. Oxy-Acetylene Welding: When a combination of Oxygen and acetylene is used in correct proportions to produce an Intense gas flame, the process is known as oxy-acetylene welding.

10. Gas Welding Equipment : 1. Gas Cylinders Pressure- Oxygen – 125 kg/cm2 Acetylene – 16 kg/cm2 2. Regulators Working pressure of oxygen 1 kg/cm2 Working pressure of acetylene 0.15 kg/cm2 Working pressure varies depends upon the thickness of the work pieces welded. 3. Pressure Gauges 4. Hoses 5. Welding torch 6. Check valve 7. Non return valve

11. Advantages: Portable and most versatile process. Better control over the temperature. Suitable to w eld dissimilar matter. Low cost & maintenance. Disadvantages: Not suitable for heavy section. Less working temperature of gas flame. Slow rate of heating.

12. Arc Welding: “Arc welding is a fusion welding process in which the h eat required to fuse the metal is obtain from the electric arc between the base metal and an electrode. Types: Metal Arc Welding Submerged Arc Welding Tungsten Inert Gas Welding Metal Inert Gas Welding

13. Equipment: A welding generator (D.C.) or Transformer (A.C.) Two cables- one for work and one for electrode Electrode holder Electrode Protective shield Gloves Wire brush Chipping hammer Goggles

14. Metal Arc Welding : Uses an electric arc to coalesce metals Arc welding is the most common method of welding metals Electricity travels from electrode to base metal to ground

15. Advantages and Disadvantages of Arc Welding Advantages Most efficient way to join metals Lowest-cost joining method Affords lighter weight through better utilization of materials Joins all commercial metals Provides design flexibility Disadvantages Manually applied, therefore high labor cost. Need high energy causing danger Not convenient for disassembly. Defects are hard to detect at joints.

16. Applications: It is used in the manufacture of automobile bodies. A ircraft Frames R ailway Wagons M achine Frames S tructural works, tanks, furniture, boilers, general repair work and ship building etc.

17. Conclusion: In these we learn about most popular welding type uses in industries. A good weld is always strong. General welding equipment is not very costly. Portable welding equipment are available. A large number of metal and alloy both similar and dissimilar can be join by welding. Welding permits considerable freedom in design.