USrmycourse-WeldingOperations-PartIIOD165 4AH, engineering

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SUBCOURSE
EDITION
OD1654
8
WELDING OPERATIONS, II
WELDING OPERATIONS, II
SUBCOURSE 0D1654
Edition 8
United States Army Combined Arms Support Command
Fort Lee, VA 23801-1809
6 Credit Hours
GENERAL
The purpose of this subcourse is to introduce the student to the inert gas
welding processes, and maintenance of welding equipment.
The scope of this subcourse consists of the inert gas welding principles,
equipment, and safety precautions; the gas metal-welding principles
operations, and equipment nomenclature; and the procedures for
troubleshooting and repairing welding equipment.
Six credit hours are awarded for successful completion of this subcourse.
Lesson 1: INERT GAS WELDING PRINCIPLES, EQUIPMENT, AND SAFETY PRECAUTIONS;
GAS METAL-WELDING PRINCIPLES, OPERATIONS, AND EQUIPMENT
NOMENCLATURE; AND PROCEDURES FOR TROUBLESHOOTING WELDING
EQUIPMENT AND DETERMINING METHODS OF REPAIR
TASK 1: Describe the inert gas and gas metal-arc welding principles,
operations, equipment nomenclature, and safety precautions.
TASK 2: Describe the procedures for troubleshooting welding equipment and
determining methods of repair.
i
WELDING OPERATIONS II - OD1654
TABLE OF CONTENTS
Section
Page
TITLE...............................................................
i
TABLE OF CONTENTS...................................................
ii
Lesson 1: INERT GAS WELDING PRINCIPLES,
EQUIPMENT, AND SAFETY PRECAUTIONS;
GAS METAL-WELDING PRINCIPLES,
OPERATIONS, AND EQUIPMENT
NOMENCLATURE; AND THE PROCEDURES
FOR TROUBLESHOOTING WELDING
EQUIPMENT AND DETERMINING METHODS
OF REPAIR................................................
1
Task 1: Describe the inert gas and gas
metal-arc welding principles, operations,
equipment nomenclature, and safety
precautions...................................................
1
Task 2: Describe the procedures for
troubleshooting welding equipment and
determining methods of repair ................................
33
Practical Exercise 1..........................................
72
Answers to Practical Exercise 1 ..............................
74
REFERENCES..........................................................
75
The passing score for ACCP material is 70%.
ii
WELDING OPERATIONS II - OD1654 - LESSON 1/TASK 1
LESSON 1
INERT GAS WELDING PRINCIPLES, EQUIPMENT, AND
SAFETY PRECAUTIONS; GAS METAL-WELDING PRINCIPLES,
OPERATIONS, AND EQUIPMENT NOMENCLATURE; AND
PROCEDURES FOR TROUBLESHOOTING WELDING
EQUIPMENT AND DETERMINING METHODS OF REPAIR
TASK 1. Describe the inert gas and gas metal-arc welding principles,
operations, equipment nomenclature, and safety precautions.
CONDITIONS
Within a self-study environment and given the subcourse text, without
assistance.
STANDARDS
Within three hours
REFERENCES
No supplementary references are needed for this task.
1. Introduction
One of the greatest advances in welding has been the development of a
welding method that does not require the application of a flux before or
during welding. This is accomplished by using an inert gas to keep air,
which would contaminate the weld, away from the arc and the molten metal.
This task describes two welding processes that are used for this purpose.
They are: tungsten inert gas (TIG) shielded arc, and metal inert gas (MIG)
electric arc welding. Even though inert gas shielded arc welding imposes a
need for more complex equipment, as compared to oxyacetylene welding, the
advantages involved have justified its adoption for use by the U.S. Army in
the field. The MIG welding process is the newer of these two recently
developed processes. The two processes are used to weld all types of metal,
but are especially useful for
1
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