Chapter 11 Welding And Riveting.

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Presentation transcript:

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.

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

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

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

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

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

WELD TERMINOLOGY

WELD TERMINOLOGY

General Welding Symbol

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

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.