WELD Welding and Cutting Fundamentals ( version L )

Transcription

1 WELD 15 - Welding and Cutting Fundamentals ( version 21812L ) Course Title Course Development Support Welding and Cutting Fundamentals Course Description Standard No This course introduces the student to basic welding and cutting techniques. Topics include welding safety, Oxyfuel cutting, Plasma Arc cutting, Air Carbon Arc cutting and gouging, base metal preparation, and weld quality requirements. This course aligns with select modules found in NCCER Levels I and II welding curricula. Pre-requisites Pre-requisites: None Co-requisites Co-requisites: All Required COFC 18 - Construction Trades Core ( 21412L ) Course Length Minutes Contact Hour Semester Credit WLU Lecture: Lab 2: Lab 3: 45 9 Total: Semester Credit Hours: Breakout Detail of Lab 3 Practicum/Internship Clinical Competencies & Outcomes Order Description Lecture Lab 2 Lab 3 Total Min Credit Hrs Pract Intern Clinical 1 Welding Safety Identify common hazards in welding. Knowledge 2 Explain and identify proper personal protection used in welding. 3 Explain various causes of accidents. Comprehension 4 Identify and explain uses for Material Safety Data Sheets (MSDS). Application 5 Explain safety techniques for storing and handling cylinders. Comprehension 6 Explain how to avoid electrical shock when welding. Comprehension 7 Describe proper material handling methods. Comprehension

2 2 Oxyfuel Cutting Identify and explain the use of oxyfuel cutting equipment. Comprehension 2 Set up oxyfuel equipment. 3 Light and adjust oxyfuel torch. 4 Shut down and disassemble oxyfuel cutting equipment. 5 Demonstrate proper procedures for changing cylinders. 6 Perform straight line and square shapes. 7 Perform piercing and slot cutting. 8 Perform bevel cutting. 9 Perform washing and gouging. 1 Operate a motorized, portable oxyfuel gas cutting machine. 3 Plasma Arc Cutting Explain the plasma arc cutting processes. Comprehension 2 Identify plasma arc cutting equipment. Knowledge 3 Prepare and set up plasma arc cutting equipment. 4 Use plasma arc cutting equipment to make various types of cuts. 5 Properly store equipment and clean the work area after use. 4 Air Carbon Arc Cutting and Gouging Identify and explain the air carbon arc cutting (CAC-A) process and equipment. Comprehension 2 Select and install CAC-A electrodes. 3 Prepare the work area and CAC-A equipment for safe operation. 4 Use CAC-A equipment for washing and gouging activities. Mechanism

3 5 Perform storage and housekeeping activities for CAC-A equipment. 6 Make minor repairs to CAC-A equipment. Mechanism 5 Base Metal Preparation Clean base metal for welding or cutting. 2 Identify and explain joint design. Knowledge 3 Explain joint design considerations. Comprehension 4 Mechanically bevel the edge of a mild steel plate. Complex 5 Thermally bevel the end of a mild steel plate. Complex 6 Select the proper joint design based on a welding procedure specification (WPS) or instructor direction. Application 6 Weld Quality Identify and explain codes governing welding. Knowledge 2 Identify and explain weld imperfections and their causes. Knowledge 3 Identify and explain nondestructive examination practices. Knowledge 4 Identify and explain welder qualification tests. Knowledge 5 Explain the importance of quality workmanship. Comprehension 6 Identify common destructive testing methods. Knowledge 7 Perform a visual inspection of fillet welds. 7 Welding Symbols Identify and explain the various part5s of a welding symbol. Knowledge 2 Identify and explain fillet and groove weld symbols. Knowledge 3 Read welding symbols on drawings, specifications, and welding procedure specifications. Application 4 Interpret welding symbols from a print. Application 8 Reading Welding Detail Drawings

4 1 Identify and explain a welding detail drawing. Knowledge 2 Identify and explain lines, material fills, and sections. Knowledge 3 Identify and explain object views. Knowledge 4 Identify and explain dimensioning. Knowledge 5 Identify and explain notes, and bill of materials. Knowledge 6 Interpret basic elements of a welding detail drawing. Application 7 sketch or draw basic welding drawings. 9 Physical Characteristics and Mechanical Properties of Metals Identify and explain the composition and classification of base metals. Knowledge 2 Explain and demonstrate field identification methods for base metals. Comprehension 3 Identify and explain the physical characteristics and mechanical properties of metals. Knowledge 4 Identify and explain forms and shapes of structural metals. Knowledge 5 Explain metallurgical considerations for welding metals. Comprehension 1 Pre-Heating and Post-Heating of Metals Explain and demonstrate how to preheat metals. 2 Describe maintaining interpass temperature. Comprehension 3 Explain postweld heat treatment of metals. Comprehension 4 Explain the effects of preheat and postheat on metals with reference to heataffected zone (HAZ), cracking, and grain or crystal structure. Comprehension 11 Soldering and Brazing Describe the proper use of the PPE, tools, and materials needed to solder or braze copper tubing. Knowledge 2 Describe how to properly prepare and solder or braze copper tubing. Knowledge 3 Describe how to prepare and shut down air-acetylene and oxyfuel equipment. Knowledge 4 Demonstrate how to prepare and shut down air-acetylene and oxyfuel equipment.

5 5 Properly prepare and solder copper tubing in various planes, using various fittings. 6 Properly prepare and braze copper tubing in various planes, using various fittings. Competency Totals: Lecture 75 Lab 2 Lab 3 45 Total Min 525 Cred Hrs 3 Pract Intern Clinical