Resistance spot welding Flashcards
Describe with the aid of a diagram the features of Resistance Spot Welding
Resistance Spot Welding is a welding process in which workpieces are welded due to a combination of a pressure applied to them and heat generated by a high electric current flowing through the contact area of the weld.
Heat produced by the current is sufficient for local melting of the workpiece at the contact point and formation of small weld pool called a ‘nugget’.
The molten metal then solidifies under a pressure and joins the pieces.
Time, pressure and current, required for the formation of a reliable joint, are determined by dimensions of the electrodes and the workpiece metal type
Describe the welding process shown under the following guidelines:
(i) Name
(ii) Method of operation
(iii) Applications
Name = Resistance spot welding
method of operation = Explained above
applications = Used to weld sheets of steel together. Can be easily automated. Used to weld car body parts together.
