Standard

WLD 104 Shielded Metal Arc Welding I

Course Description

Introduces the fundamental theory, safety practices, equipment, and techniques required for shielded metal arc welding (SMAW) in the flat position. Qualification tests, flat position, are used in the evaluation of student progress toward making industrial standard welds. Topics include: SMAW safety and health practices, fundamental SMAW theory, basic electrical principles, SMAW machines and set up, electrode identification and selection, materials selection and preparation, and production of beads and joints in the flat position.

Competency Areas		Hours
SMAW Safety and Health Practices		Class	3
Fundamental SMAW Theory		D. Lab	4
Basic Electrical Principles		P. Lab/O.B.I.	3
SMAW Machines and Set Up		Credit	6
Electrode Identification and Selection
Materials Selection and Preparation
Production of Beads and Joints in the Flat Position
Prerequisite:	WLD 100
Corequisite:

Course Guide

Competency	After completing this section, the student will:	Hours
		Class	D.Lab	P.Lab/ O.B.I.
SMAW SAFETY AND HEALTH PRACTICES		5	2	0
Safety and environmental requirements	Identify safe practices associated with shielded metal arc welding in the lab and industrial environment.
FUNDAMENTAL SMAW THEORY		5	2	0
Theory Principles	Identify the fundamentals of SMAW as welding is performed.
	Define the principles of SMAW.
BASIC ELECTRICAL PRINCIPLES		5	1	0
Basic electricity	Define the basic principles of electricity and its conversion to the SMAW application.
SMAW MACHINES AND SET UP		5	3	0
Power sources	List the different power sources common to the SMAW process.
Cycles and procedures	Identify duty cycles and general operational procedures of SMAW equipment.
ELECTRODE IDENTIFICATION AND SELECTION		5	2	0
Groups	List the three basic groups of mild steel electrodes.
Characteristics	Identify mild steel electrodes as defined by the AWS.
MATERIALS SELECTION AND PREPARATION		5	2	0
Selection and preparation	Describe proper pre-weld metal preparation and selection.
	Demonstrate proper tack welding techniques, relieving welding distortion, and post weld cleaning.
PRODUCTION OF BEADS AND JOINTS IN THE FLAT POSITION		0	28	30
Machine setting	Adjust amperage and select welding current for producing surfacing welds in the flat position using appropriate AWS coded "fill freeze" electrodes.
Joint construction	Produce satisfactory welds on butt (closed and open), lap, and tee joints.
	Pass fillet weld soundness test (break test).
	Adjust amperage and select welding current for producing surfacing welds in the flat position using appropriate AWS coded "fast freeze" electrodes.
	Produce satisfactory welds on butt (open and closed), lap, and tee (single and multipass).
Tests	Pass fillet weld soundness test (break test). Pass bend test on open butt.
Adjustments	Adjust amperage and select welding current for producing surfacing welds in the flat position using appropriate AWS coded "fast fill" electrodes.
	Produce satisfactory welds on butt, lap, and tee (single and multipass) joints.
	Pass fillet weld soundness test (break test).
	Adjust amperage and select welding current for producing surfacing welds in the flat position using low hydrogen electrodes.
	Produce satisfactory welds on butt, lap, and tee joints.
	Pass guided bend or side bend test on vee groove with backing.

Suggested Resources

Suggested Resources include textbooks shown below or most current edition.

Welding Links

American Welding Society http://www.amweld.org/

Welders Bookstore http://www.amweld.org/

Books

Althouse, A. D., & Turnquist, C. H. (1992). Modern welding. South Holland, IL: Goodheart-Willcox.

http://www.goodheartwillcox.com/

American National Standards Institute. (Latest Edition). ANSI codes and standards. New York: Author.

http://www.normas.com/AWS/

The American Society of Mechanical Engineers. (Latest Edition). ASME codes and standards. New York: Author.

http://www.normas.com/AWS/

American Welding Society. (Latest Edition). AWS codes and standards. Miami: Author.

http://www.normas.com/AWS/

Giachino, J. W., et al. (1992). Welding skills and practices. Kalamazoo, MI: Books Demand.

http://www.upublish.com/

Griffin, I. H., et al. (Latest Edition). Welding processes (3rd ed.). Albany, NY: Delmar.

http://www.delmar.com/

Sacks, R. J. (Latest Edition). Welding principles and practices (4th ed.). Peoria, IL: Bennett.

http://www.spartacus.schoolnet.co.uk/Jbennett.htm

Smith, P. (Latest Edition). Welding skills and technology. New York: McGraw-Hill.

http://www.bookstore.mcgraw-hill.com/