I. General Information

1. Course Title:
Gas Metal ARC Welding

2. Course Prefix & Number:
WELD 1117

3. Course Credits and Contact Hours:

Credits: 3

Lecture Hours: 1

Lab Hours: 4

4. Course Description:

Instruction is presented in theory, equipment, technique, and skill development. Students are charged with developing skills in the flat, horizontal, vertical, and overhead positions on mild steel. Processes utilized include short circuit transfer, spray, pulse, and flux core. The main objective is to build the students’ skill set to reach a level of quality for entry level positions.

5. Placement Tests Required:

6. Prerequisite Courses:

9. Co-requisite Courses:

II. Transfer and Articulation

III. Course Purpose

1. Program-Applicable Courses – This course is required for the following program(s):

Welding, Diploma and AAS

IV. Learning Outcomes

1. College-Wide Outcomes

2. Course Specific Outcomes - Students will be able to achieve the following measurable goals upon completion of the course:

V. Topical Outline

Listed below are major areas of content typically covered in this course.

1. Lecture Sessions

1. Describe the various methods of metal transfer
• Axial Spray
• Globular Transfer
• Pulsed Arc
• Short Circuit Transfer
2. Explain the effect of slope and inductance on gas metal arc welding
• Slope
• Inductance
• Pinch Effect
• Adjusting a fixed slope machine.
3. Welding Power Supplies
• Electrical terms
• CV-CP
• CC
• IPM
• Shielding Gas selection
• Travel speed
• Electrode extension
• Gun angle
• Types of feed units
• Bird-nesting
• Flow rate/Gas density
4. Flux Cored Arc Welding
• Explain the effect of flux on the weld
• Explain the difference between self shielding and gas shielding
• Describe the different ways electrodes are made.
• List the advantages and limitations of flux core arc welding
• Explain electrode cast and helix
• Describe the components used in flux.

2. Laboratory/Studio Sessions

1. Perform the following welds on mild steel.
2. Weld flat position stringer beads push pull
3. Weld 2F lap joint 16 ga
4. Weld 1F tee joint 16 ga
5. Weld 1G butt joint 10-12 ga
6. Weld 1G multi pass butt joint22.5 degree WB 3/8” plate
7. Weld 1G multi pass butt joint22.5 degree WOB 3/8” plate
8. Weld GMAW beads horizontal 2”X6” 3/8” Plate
9. Weld 2G butt joint 12-16 ga
10. Weld 2F lap joint 10-12 ga
11. Weld 1G V groove 3/8” bend test
12. Weld 2G V groove 3/8” plate
13. Weld 3F tee 3/8” plate root down cover up
14. Weld 3G V groove 3/8” plate root down cover up
15. Weld 3F tee down 12-16 ga
16. Weld 3G butt down 12-16 ga
17. Weld 4F tee 12-16 ga
18. Weld 4G butt joint 10-12 ga
19. Weld 4G V groove 3/8” WOB
20. Weld 1G v groove butt joint 3/8” plate WB FCAW
21. Weld 1G V groove 3/8” WOB FCAW
22. Perform guided bend test
23. Weld 1G butt joint ¼” plate WB FCAW
24. W.  Weld 2F tee joint 3’8” plate spray transfer
25. Weld2F lap joint ¼: plate spray transfer
26. Weld 2F lap joint 3/8” plate FCAW
27. Weld 1G butt joint V grooved WOB FCAW
28. Perform bend test
29. Weld 3F tee 3/8” plate up FCAW 1 pass
30. Weld 4F tee 3/8” FCAW 3 Pass
31. Weld 3G butt joint V groove 3/8” plate up FCAW 3 pass WB
32. Weld 2G butt joint V groove Pulse