Welding - D20uo2axdbh83k.cloudfront
PowerPoint to accompany Welding Principles and Practices Third Edition Chapter 9 – ARC WELDING Sacks and Bohnart Welding Symbols 1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Objectives 1. Know the name of the AWS standard for welding symbols 2. List the eight elements that may be found on a welding symbol 3. List the basic weld symbols 4. List the supplementary symbols 5. Name the five basic joints 6. Identify the applications of the different weld symbols 30 - 2
American Welding Society Material in this chapter reprinted through courtesy of AWS – Symbols include latest revision For more detailed reference – Booklet Standard Symbols for Welding, Brazing, and Nondestructive Examination (AWS A2.4-98) Published by the AWS Many companies develop own system of symbols, references with AWS as base 30 - 3
ANS Symbol System Joint – Basis of reference Welded joint indicated by symbol will have arrow side and other side Use tail of reference line for giving specifications for welding – Welding process; type and brand of filler metal; where or not peening, chipping or preheating required and other information 30 - 4
Welding Symbol Components Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 5
Examples of Arrow Symbols Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 6
AWS Standard Weld symbol – Graphic symbol that indicates weld required Welding symbol – Following eight elements: Reference line (required) Arrow (required) Basic weld symbols Dimensions and other data Supplementary symbols Finish symbols Tail Other specifications Standard welding symbols given in Table 30-1 30 - 7
Basic Weld Symbols AWS Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 8
Basic Weld Symbols AWS Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 9
Welding Symbols AWS Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 10
Filet Welds and Symbol Fillet weld triangular-shaped weld placed on the joint Fillet weld symbol triangular in shape – Vertical line of fillet weld symbol always drawn to left of symbol – Size always shown to left of symbol and length to right of symbol No length given, then weld should run full length of joint 30 - 11
Examples: Fillet Welds on T-Joints Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 12
Example: Fillet Weld Length and Pitch Indications Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 13
Weld-All-Around Symbol Used when weld is to extend all way around joint or series of connected joints Symbol: circle viewable at junction of reference line and arrow 30 - 14 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Groove Welds Seven types of groove welds and symbols to represent them – – – – – – – Square V Bevel U J Flare-V Flare-bevel Symbols take the shape of the groove the weld is to be placed in. 30 - 15
Groove Welds Place in a joint Used to make butt joints, but can be used to make other types of joints Double bevel – One of joint members has bevel on both sides and joint is to be welded from both sides – V shape 30 - 16
V-groove Weld on Butt Joint Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 17
Double V-groove Weld on Butt Joint Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 18
Contour Symbol Desired shape of weld shown on welding symbol Located above imaginary face of weld for groove weld symbols and above side of triangle that most closely represents face of weld – Flat: straight line – Concave and convex: takes on that shape 30 - 19
Contour Symbol and Letters Which Indicate Finishing Method Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 30 - 20
List the basic weld symbols 4. List the supplementary symbols 5. Name the five basic joints 6. Identify the applications of the different weld symbols . 30 - 3 American Welding Society . Finish symbols Tail Other specifications Standard welding symbols given in Table 30-1 . 30 - 8
6.3 Mechanised/automatic welding 114 6.4 TIG spot and plug welding 115 7 MIG welding 116 7.1 Introduction 116 7.2 Process principles 116 7.3 Welding consumables 130 7.4 Welding procedures and techniques 135 7.5 Mechanised and robotic welding 141 7.6 Mechanised electro-gas welding 143 7.7 MIG spot welding 144 8 Other welding processes 147 8.1 .
seam butt welding resistance butt welding flash butt welding resistance butt welding shielded unshielded other process plasma laser resistance butt welding inert gas welding submerged arc welding atomic hydrogen shielded metal arc welding (coated electrode) esepl w w w . e u r e k a e l e c t r o d e s .
the welding processes most often used in today's industry including plasma arc cutting, oxyfuel gas cutting and welding, Gas Metal Arc Welding (GMAW), Flux-Cored Arc Welding (FCAW), Shielded Metal Arc Welding (SMAW), and Gas Tungsten Arc Welding (GTAW). Flat welding positions and basic joints will be practiced. Pipe and tube welding
3. Classification of Underwater Welding Underwater welding may be divided into two main types: a) Wet welding b) Dry welding Fig. 3.1 Classification of underwater welding 3.1 Wet welding 3.1.1. Wet welding with coated electrode Wet welding is performed at ambient pressure with the welder-diver in the water and no physical barrier
10.6 Braze-welding 460 Exercises 466 11 Joining processes (welding) 467 11.1 Fusion welding 468 11.2 Oxy-acetylene welding 468 11.3 Manual metal-arc welding 490 11.4 Workshop testing of welds 504 11.5 Miscellaneous fusion welding processes 506 11.6 Workholding devices for fusion welding 509 11.7 Resistance welding 515
Welding residual stresses and stress relieve Formation of the weld metal Solidification of the weld metal Phase transformations during welding Basics of welding methods used in welding of zirconium alloys TIC Laser Welding Electron Beam Welding Upset shape welding Resistance Appendix C -R
affected zone. Welding processes that are commonly used with the corrosion-resistant alloys are shown in Table 1. In addition to these common arc welding processes, other welding processes such as plasma arc welding, resistance spot welding, laser beam welding, electron beam welding, and submerged arc welding can be used. Because of
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