WELD 0002A. Gas Metal Arc Welding of Mild Carbon Steel on Sheet and Plate

Units: 2
Formerly known as WELD 40
Hours: 72 (18 lecture, 54 laboratory)
Designed for those interested in beginning stages of welding. Students are taught to weld on mild carbon steel sheet and plate in various welding positions and joint configurations using Gas Metal Arc Welding. Explores the various modes of metal transfer when using the Gas Metal Arc Welding process. Prepares students to work in welding shop environment. (not transferable)

WELD 0002A - Wire Feed Welding Processes - Career Path

http://catalog.sierracollege.edu/course-outlines/weld-0002a/

Catalog Description Formerly known as WELD 40 Hours: 72 (18 lecture, 54 laboratory) Description: Designed for those interested in beginning stages of welding. Students are taught to weld on mild carbon steel sheet and plate in various welding positions and joint configurations using Gas Metal Arc Welding. Explores the various modes of metal transfer when using the Gas Metal Arc Welding process. Prepares students to work in welding shop environment. (not transferable) Course Student Learning Outcomes CSLO #1: Apply knowledge of safety standards for both a learning environment and work site environment with focus on GMAW welding processes to perform student assignments. CSLO #2: Define terms related to this course; wire feed speed, volts, contact tip to work distance, travel angle, work angle, travel speed, and electrode manipulation. CSLO #3: Demonstrate single and multi-pass welds using GMAW on carbon steel sheet and plate in 2F, 3F, 4F, 2G, 3G, 4G positions on 16 ga, 1/8", and 1/4" mild steel. CSLO #4: Perform equipment set-up diagnostic procedures including fixing a bird nest and identifying gas leak issues. Effective Term Fall 2025 Course Type Credit - Degree-applicable Contact Hours 72 Outside of Class Hours 36 Total Student Learning Hours 108 Course Objectives   Lecture Objectives   General Safety Identify typical safety hazards and precautions required when working in any typical metal workplace Identify personal protective equipment for head, eyes, ears, torso & arms, hands, legs, and feet that must/should be worn in a welding workspace as appropriate Apply appropriate safety measures for all individuals in a metal workplace Essential Variables During the Welding Process Identify the variables that affect heat input and weld quality while performing a weld Wire-Feed Speed and Voltage Contact Tip to Work Distance Direction of Travel & Travel Angle Work Angle Travel Speed Electrode Manipulation Gas Selection and adjustment as applicable Welding Equipment GMAW Identify all external parts of applicable welding equipment Assemble and disassemble applicable welding components Describe the basic function of the welding process Explain the difference between Constant Current and Constant Voltage machines Explain why GMAW and FCAW use CV Basic Welding Types, Joints, and Positions Identify the 4 basic welding types Surface, Fillet, Groove, Plug/Slot List the 2 most common welding types Identify the 5 basic welding joints Butt, Lap, Tee, Corner, Edge Basic Welding Positions and how Welding, Types, Joints, and Positions Combine Identify the 8 most common welding positions 1F- Flat Fillet, 2F- Horizontal Fillet, 3F- Vertical Fillet, 4F- Overhead Fillet 1G- Flat Groove, 2G- Horizontal Groove, 3G- Vertical Groove, 4G- Overhead Groove Demonstrate how welding types are applied to the 5 basic welding joints and what the corresponding welding positions are for each of those situations Fillet Welds Identify the parts of a fillet weld and the 5 fillet weld profiles, (concave, flat, convex, excessive reinforcement, insufficient throat) Label which fillet weld profiles are desired, acceptable, generally unacceptable and always unacceptable. Explain the difference between a “weld symbol” and a “welding symbol” Identify a fillet weld symbol Apply all aspects of a fillet welding symbol to a joint and draw corresponding joints to dimension Identify the 3 basic parts of a welding symbol; arrow, reference line, and tail Explain the significance of information placed above or below the reference line Welding Polarities Draw out the following polarities and their electron flow pattern Direct Current Electrode Positive Alternating Current Direct Current Electrode Negative Grinder Safety & Basic Use Identify key parts of a 4 -1/2” right angle grinder Demonstrate safe use of right-angle grinder with hard disc, cut-off wheel, and flap wheel Perform correct use of grinder and abrasive by minimizing abrasive degradation Tape Measure Use and Reading Explain and use the basic features of a common tape measure and ruler in eighth inch increments Identify tape measure in 1/8” increments right side up and upside down Recite fractions to halves, quarters, and eights Basic Fractional Math Perform addition of fractions to 1/8” Perform subtraction of fractions to 1/8” Modes of Transfer List and describe the 4 modes of transfer Enumerate the minimum and maximum voltage ranges for each transfer mode Enumerate the 4 transfer modes from least to most heat input Identify which modes of transfer are employed on various types of metal Auditory and/or Visually identify each mode of transfer Plasma Arc Cutting (PAC) Safety and Operation Recite or show the safety features and hazards of a PAC system Identify the key parts of a PAC system Assemble and dis-assemble a PAC system Perform a series of clean straight and round cuts on scrap metal Trouble Shoot a PAC system GMAW vs FCAW Compare and contrast the similarities and differences between GMAW, FCAW Discuss the pros and cons of using one process over the other process Analyze the differences in material thickness, metal deposition and penetration (fusion) between the 2 processes Welding Electrodes/Filler Metals Decipher the parts of an electrode classification Name common filler metals and discuss their advantages/disadvantages for welding various carbon steel alloys Shielding Gasses Explain why certain gasses are used for various applications in the lab Summarize shielding gasses used in GMAW and describe their characteristics and effectiveness Know the proper psi ranges for each application Cylinder Safety and Owner vs Rental Cylinders List all safety precautions for non-flammable gas cylinder storage List all safety precautions for flammable gas cylinder storage List all safety precautions for flammable and non-flammable gas cylinder transportation Identify and explain markings on cylinder shoulders Explain the differences between owning and renting cylinders and how to identify each Basic Metallurgy Describe the difference between iron and steel Classify low, medium, and high carbon steel by percent carbon content Define hardness, strength, ductility, and weldability Explain basic relationship between carbon content, hardness, strength, ductility, and weldability. Laboratory Objectives Lab Assignments and/or Lab Projects Recall common terminology and concepts used in the application of welding operations and apply to the lab setting Employ pre-weld metal preparation techniques to ensure weld quality Demonstrate pre-weld procedures and apply correct welding parameter adjustment tasks. Apply foundational skills to weld carbon steel to industry-based-acceptance criteria Apply demonstrated techniques to weld beads with each welding process used in this course on the assigned student projects Perform the following Lab Assignments: Brick, 4 sides: Side 1 is 1F stringers, Side 2 is 2F stringers, Side 3 is 4F stringers, Side 4 is 3F up weaves. .035 or .045 or .052 ER70S-6. Repeating Corner Joint: 1/8" base metal, 2F, 3F down, and 4F. Repeating Lap Joint: 1/8" base metal, 2F, 3F down, and 4F. Repeating Tee Joint: 1/8" base metal, 2F, 3F down, and 4F. Repeating Butt Joint: 1/8" base metal, 2F, 3F down, and 4F. Extra Credit: Repeating Edge Joint: 1/8" base metal, 2F, 3F down, and 4F. Combo Joint: 1/8" base metal Repeating Corner Joint: 16ga base metal, 2F, 3F down, and 4F. Repeating Lap Joint: 16ga base metal, 2F, 3F down, and 4F. Repeating Tee Joint: 16ga base metal, 2F, 3F down, and 4F. Repeating Butt Joint: 16ga base metal, 2F, 3F down, and 4F. Extra Credit: Repeating Edge Joint: 16ga base metal, 2F, 3F down, and 4F. Combo Joint: 16ga base metal Repeating Corner Joint: 1/4" base metal, 2F, 3F down, and 4F. Repeating Lap Joint: 1/4" base metal, 2F, 3F down, and 4F. Repeating Tee Joint: 1/4" base metal, 2F, 3F down, and 4F. Repeating Butt Joint: 1/4" base metal, 2F, 3F down, and 4F. Extra Credit: Repeating Edge Joint: 1/4" base metal, 2F, 3F down, and 4F. Combo Joint: 1/4" base metal Mock Certification Test: 3G single-vee groove with backing using 3/8" base metal Mock Certification Test: 4G single-vee groove with backing using 3/8" base metal Shop Skills: layout with tape measure, PAC, grind with hard disc and then flap disc, mock certification test to specifications requested. General Education Information Approved College Associate Degree GE Applicability CSU GE Applicability (Recommended-requires CSU approval) Cal-GETC Applicability (Recommended - Requires External Approval) IGETC Applicability (Recommended-requires CSU/UC approval) Articulation Information Methods of Evaluation Objective Examinations Example: 1. Students will take a multiple choice test on welding symbols. Standard Grading Projects Example: 1. At the start of assigned project, the student will demonstrate a material layout. 2. During the assembly of assigned project, the student will perform fit up steps and tacking procedures. Grading based on industry standard. Skill Demonstrations Example: 1. Students will demonstrate the ability to safely weld in the vertical up and vertical down positions. 2. Student will perform an open groove welding test. 3. Student will demonstrate settings used for various welding modes in GMAW. Grading is based on industry standard. Repeatable No Methods of Instruction Laboratory Lecture/Discussion Distance Learning Lab: With instructor demonstration and oversight, students will apply various welding techniques using Short Circuit, Globular, Spray, and Pulsed Spray Transfers. Following class lecture, video presentation, and lab demonstration, instructor will supervise while students practice with flux cored, metal cored and solid alloys. Lecture: Lecture and interpersonal group discussion on the various types and applications of welding modes, such as FCAW-G Flux Cored Welding with dual Shielding vs FCAW-S Flux Cored Welding self shielding. Distance Learning Instructor will use slide show presentation, instructor created video, or lecture presentation on a learning platform to teach about best safety practices in the for personal protective equipment, the weld lab environment, and/or tools & equipment. Students will be given a scenario and expected to list the best safety practices that should be employed and explain why they should be used. Students will submit the assignment via text entry, file upload, video or audio recording. Typical Out of Class Assignments Reading Assignments 1. The student will read chapter from the course text on GMAW transfer modes of short circuit, globular, spray transfer, and related materials and be prepared for classroom discussion. 2. The student will look up the welding parameters for the different wire diameters and compositions to become familiar with the correct machine settings to use. Writing, Problem Solving or Performance 1. The student will create a report of the different chemical compositions from the reading assignments welding procedures for Metal Cored and other solid alloys. 2. Students demonstrate their performance of each of the various welds, such as pulsed spray transfer, on lab assignments during each class meeting. Other (Term projects, research papers, portfolios, etc.) Required Materials Welding Principles and Practices Author: Edward R. Bohnart Publisher: McGraw Hill Publication Date: 2017 Text Edition: 5th Classic Textbook?: OER Link: OER: GMAW/FCAW Handbook Author: Minnick, Mosman Publisher: Goodheart-Willcox Publication Date: 2023 Text Edition: 2nd Classic Textbook?: No OER Link: OER: Other materials and-or supplies required of students that contribute to the cost of the course.

Advanced Manufacturing

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