Download Arc Welding Report PDF

TitleArc Welding Report
TagsChemical Substances Welding Metals Industrial Processes Joining
File Size653.7 KB
Total Pages15
Table of Contents
                            Contents
1.0 INTRODUCTION
2.0 OBJECTIVES
3.0 SAFETY IN THE WORKSHOP
	3.1 Personal Protection
	3.2 Safety Precaution
4.0 Material and Tools

5.0 TYPES OF WELDING JOINT
	5.1 Patent-Pending Process
	5.2 Close Butt Joints
	5.3 Corner Joints
6.0 SUGGESTIONS FOR IMPROVEMENT
7.0 CONCLUSION
                        
Document Text Contents
Page 1

Contents

Contents................................................................................................................................1

1.0 INTRODUCTION..............................................................................................................2

2.0 OBJECTIVES...................................................................................................................3

3.0 SAFETY IN THE WORKSHOP........................................................................................3

3.1 Personal Protection.......................................................................................................3

3.2 Safety Precaution..........................................................................................................3

4.0 Material and Tools.........................................................................................................4

9

5.0 TYPES OF WELDING JOINT.........................................................................................10

5.1 Patent-Pending Process.............................................................................................10

5.2 Close Butt Joints.........................................................................................................11

5.3 Corner Joints...............................................................................................................13

6.0 SUGGESTIONS FOR IMPROVEMENT.........................................................................14

7.0 CONCLUSION..............................................................................................................15

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1.0 INTRODUCTION

• Arc welding is a type of welding that uses a welding power supply to create
an electric arc between an electrode and the base material to melt the metals at the
welding point. They can use either direct (DC) or alternating (AC) current, and
consumable or non-consumable electrodes. The welding region is usually
protected by some type of shielding gas, vapor, or slag. Arc welding processes
may be manual, semi-automatic, or fully automated. First developed in the late
part of the 19th century, arc welding became commercially important in
shipbuilding during the Second World War. Today it remains an important
process for the fabrication of steel structures and vehicles.

• Arc welding is one of alternative for joining process in manufacturing. Arc

welding process had done by create an electric arc between electrode and the base

material to melt the metal at the welding point using welding power supply. The

welding region is sometimes protected by some type of inert or semi-inert gas,

known as a shielding gas and sometime adds by an evaporating filler material.

Shielded metal arc welding (SMAW), also known as manual metal arc (MMA)

welding or informally as stick welding, is a manual arc welding process that uses

a consumable electrode coated in flux to lay the weld. They can use either direct

current (DC) or alternating current (AC) from a welding power supply, used to

form an electric arc between the electrode and the metal to be joined. As the weld

is laid, the flux coating of the electrode disintegrates, giving off vapors that serve

as a shielding gas and providing a layer of slag, both of which protect the weld

area from atmospheric contamination. Gas metal arc welding (GMAW),

sometimes referred to by its sub types metal inert gas (MIG) welding or metal

active gas (MAG) welding, is a semi-automatic or automatic arc welding process

in which a continuous and consumable wire electrode and a shielding gas are fed

through a welding gun. A constant voltage, direct current power source is most

commonly used with GMAW, but constant current systems, as well as alternating

current, can be used. There are four primary methods of metal transfer in GMAW,

called globular, short-circuiting, spray, and pulsed-spray, each of which

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http://en.wikipedia.org/wiki/Shielding_gas
http://en.wikipedia.org/wiki/Electrode
http://en.wikipedia.org/wiki/Alternating_current
http://en.wikipedia.org/wiki/Direct_current
http://en.wikipedia.org/wiki/Electric_arc
http://en.wikipedia.org/wiki/Welding_power_supply
http://en.wikipedia.org/wiki/Welding

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