One of the welding processes that used in Engineering field is the resistance spot welding. There are several types of welding processes similar to this, but resistance spot welding has its unique features. Thanks for the colleagues who give this slides to publish.

1. Resistance Spot welding

2. SPOT WELDING
 Resistive Spot Welding is a process in which
contacting metal surfaces are joined by the
heat obtained from resistance to electric
current.

4. Different TYPES OF SPOT
WELDING MACHINES

5. PARTS OF THE MACHINE

6. WORKING PRINCIPLE
H=I2RT
I – Current
R – Resistance of the
conductor
T – Time of current flow

7. ADVANTAGES:
 Quick and Easy
 No need of Flux and Filler metals
 Multiple sheets joined together at the same
time
 No dangerous open flames
 Saves production cost
 Dimensional Accuracy

8. LIMITATIONS:-
 Difficulty for maintenance or repair
 Generally have higher cost than
most arc welding equipment
 Low tensile and fatigue strength
 The full strength of the sheet cannot prevail
across a spot welded joint

9. APPLICATIONS
 Automobile industry
 Dental Prosthesis
 Batteries
 Nuts and Bolts