1. Chapter 11
Welding And Riveting

2. Welding and riveting are methods for the permanent assembly of metal parts.
WELDING PROCESSES
Welding can be divided at least three classes: arc welding, gas welding, and resistence welding.
1) Arc welding: Heat is generated by an electric arc that raises to the proper temparature and the parts are simply fused together to became one. In some cases electrode is used that provides a filler material.
2) Gas welding: A combustible gas such as a mixture of oxygen and acetylene raises the temperature of the part to be joined and a welding rod provides filler material.

3. 3)Resistance welding: The parts that are to be welded, while being forced together by mechanical pressure, are raised to the temperature of fusion by the passage of a heavy electrical current through the junction. (Filler materials are not used. One form is "spot welding")
There are five types of welded joints. The types are named by the geometric relationship between the two parts. There are many types of welds that can be used to join the parts.

6. J-GROOVE
FLARE BEVEL GROOVE
SPOT
PROJECTION
SEAM
FILLET
PLUG
SLOT
SQUARE GROOVE
BEVEL GROOVE
APPLICABLE WELDS
TYPE OF JOINT

7. WELDING DRAWINGS BASIC WELDING JOINTS J-GROOVE FLARE V-GROOVE
FLARE BEVEL GROOVE
EDGE FLANGE
SQUARE GROOVE
V-GROOVE
BEVEL GROOVE
U-GROOVE
APPLICABLE WELDS
TYPE OF JOINT
BASIC WELDING JOINTS

8. WELDING DRAWINGS BASIC WELDING JOINTS FLARE V-GROOVE
FLARE BEVEL GROOVE
EDGE FLANGE
CORNER FLANGE
SPOT
PROJECTION
SEAM
FILLET
SQUARE GROOVE
V-GROOVE
BEVEL GROOVE
U-GROOVE
J-GROOVE
APPLICABLE WELDS
TYPE OF JOINT
BASIC WELDING JOINTS

9. WELDING DRAWINGS BASIC WELDING JOINTS J-GROOVE FLARE BEVEL GROOVE SPOT
PROJECTION
SEAM
FILLET
PLUG
SLOT
BEVEL GROOVE
APPLICABLE WELDS
TYPE OF JOINT
BASIC WELDING JOINTS

10. WELDING DRAWINGS BASIC WELDING JOINTS EDGE FLANGE CORNER FLANGE SPOT
PROJECTION
SEAM
EDGE
PLUG
SLOT
SQUARE GROOVE
BEVEL GROOVE
V-GROOVE
U-GROOVE
J-GROOVE
APPLICABLE WELDS
TYPE OF JOINT
BASIC WELDING JOINTS

11. WELD TERMINOLOGY

12. WELD TERMINOLOGY

13. General Welding Symbol

18. COMPARISON OF A CAST SHAFT SUPPORT WITH A WELDED STEEL SHAFT SUPPORT
WELDING DRAWINGS
COMPARISON OF A CAST SHAFT SUPPORT WITH A WELDED STEEL SHAFT SUPPORT

19. RIVETS
Rivets are used for making permanent fastening, generally between pieces of sheet or rolled metal.
They are round bars of steel with a head formed on one end and are often put in place red-hot so that a head can be formed on the other end by pressing or hammering.