1. GAS WELDING PROCESS Prof. J L RAMDATTI Presented by:-
GOVERNMENT ENGINEERING COLLEGE.
PRODUCTION ENGINEERING DEPT,
BHAVNAGAR (GUJARAT)

2. At the end of this session, you will able to understand:-
Introduction
Oxy-Acetylene Welding
Principle Operation
Types Of Welding Flames
Types of joint to be prepared
Gas Welding Equipment
Prof.J.L.RAMDATTI

3. INTRODUCTION
Gas welding is a fusion welding process. It joins metals, using the heat of combustion of an oxygen/air and fuel gas (i.e acetylene, hydrogen, propane or butane) mixture.
The intense heat (flame) thus produced melts and fuses together the edges of the parts to be welded, generally with the addition of a filler metal.
Prof.J.L.RAMDATTI

4. Oxy Acetylene Welding Principle of Operation
Prof.J.L.RAMDATTI

5. Oxy Acetylene Welding Principle of Operation
When acetylene is mixed with oxygen in correct proportions in the welding torch and ignited, the flame resulting at the tip of the torch is sufficiently hot to melt and join the parent metal.
The oxyacetylene flame reaches a temperature of about 3200°C and thus can melt all commercial metals which, during welding, actually flow together to form a complete bond.
Prof.J.L.RAMDATTI

6. Oxy Acetylene Welding Principle of Operation
A filler metal rod is generally added to the molten metal pool to build up the seam slightly for greater strength. Oxyacetylene welding does not require the components to be forced together under pressure until the weld forms and solidifies.
Prof.J.L.RAMDATTI

7. Oxy Hydrogen and Other Fuel Gas Welding
Given below are the approximate flame temperatures of oxygen and various fuel gas combinations. Oxyacetylene 3200°C Oxy hydrogen 2500°C Oxy propane 2500°C
Prof.J.L.RAMDATTI

8. GAS WELDING EQUIPMENT Oxygen Gas & Acetylene Gas Cylinder
Oxygen Pressure & Acetylene Pressure Regulator
Oxygen Gas & Acetylene Gas Hose
Welding Torch or Blow Pipe
Trolleys for Transportation Oxygen Gas &
Acetylene Gas Cylinder
Filler Rods and fluxes
Protective clothing for the welder
Prof.J.L.RAMDATTI

9. Prof.J.L.RAMDATTI

10. Conclusion:-
We are able to understand how gas welding works, its principle, various component, which types of fuel used and how much temp are to be produced with various combinations of fuel.
Which types of metals to be welded by gas welding also describe.
Prof.J.L.RAMDATTI

11. Reference:- A manufacturing process- Hazra and Chaudhry
A manufacturing process, vol-I,by B.S. Raghuvanshi.
Metal forming process by O.P. Khanna.
Text book of Production engineering by P.C. Sharma.
Prof.J.L.RAMDATTI

12. THANK YOU ALL