Chapter 11 Welding And Riveting Welding and riveting

Chapter 11 Welding And Riveting

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)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.

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

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

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

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

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

WELD TERMINOLOGY

WELD TERMINOLOGY

General Welding Symbol

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

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 are often put in place red-hot so that a head can be formed on the other end by pressing or hammering.