Updated: 12/11/2009

Resources:

References:

• Lincoln Electric, No Teacher Left Behind; CD Series

Teachers:

• Dick Piersma - Hilmar
• Darrell Hirschler – Tulelake
• Ryan Patterson - Ripon
• Search for Ag Mechanics Teachers

Texts:

• Agriculture Mechanics Fundamentals and Applications – 6th Edition, Ray Herren; Thompson-Delmar Learning
• Modern Welding, Andrew Althous, Carl Turnquist, William Bowditch, Kevin Bowditch, and Mark Bowditch; Goodheart-Wilcox Company, INC.
• Modern Welding – Instructor Manual, Bowditch, Bowditch, Bowditch; Goodheart-Wilcox Company, INC.
• Modern Welding – Laboratory Manual, Bowditch, Bowditch, Bowditch; Goodheart-Wilcox Company, INC.
• Deere & Company. (1987). WELDING (6th ed.) (Fundamentals of Service (FOS) Series). Available from: John Deere Technical Services, Dept. F, John Deere Road, Moline, IL 61265 (Available in Spanish)
• Phipps, Lloyd J., & Reynolds, Carl L. (1990). MECHANICS IN AGRICULTURE (4th ed.). Danville, IL: Interstate Publishers.

Web Sites:

• American Welding Society

• Victor

Curriculum:

2250, 2251, 2252, 2253, 2254, 2255, 2256, 2257, 2258, 2299

Methods:

• Read the Oxy-Fuel welding and cutting units in the text book(s) you are using.
• Be familiar with all handouts that you plan to use as support materials for this unit.
• Be sure you are comfortable performing any of the skills you will be demonstrating to your class.

Standards:

B1.0 Students understand personal and group safety:

B1.1 Practice the rules for personal and group safety while working in an agricultural mechanics environment.

B1.2 Know the relationship between accepted shop management procedures and a safe working environment.

B5.0 Students understand agricultural cold metal processes:

B5.1Know how to identify common metals, sizes, and shapes.

B5.3 Know layout skills.

B5.4 Know basic cold metal processes (e.g., shearing, cutting, drilling, threading, bending.).

B7.0 Students understand oxy-fuel cutting and welding:

B7.1 Understand the role of heat and oxidation in the cutting process.

B7.2 Know how to properly set up, adjust, shut down, and maintain an oxy-fuel system.

B7.3 Know how to flame-cut metal with an oxy-fuel cutting torch.

B7.4 Know how to fusion-weld mild steel with and without filler rod by using oxy-fuel equipment.

B7.5 Know basic repair skills using a variety of techniques, such as brazing or hard surfacing.

4.0 Technology.

Students know how to use contemporary and emerging technological resources in diverse and changing personal, community, and workplace environments:

4.1 Understand past, present, and future technological advances as they relate to a chosen pathway.

4.6 Differentiate among, select, and apply appropriate tools and technology.

5.0 Problem Solving and Critical Thinking

Students understand how to create alternative solutions by using critical and creative thinking skills, such as logical reasoning, analytical thinking, and problem-solving techniques:

5.1 Apply appropriate problem-solving strategies and critical thinking skills to work-related issues and tasks.

5.3 Use critical thinking skills to make informed decisions and solve problems.

Unit Topics:

1. Introduction
   1. UNIT GOAL: Students will understand and demonstrate skills involved in the oxyacetylene welding process and the roles heat and pressure play in the process, and will be able to operate and use the oxyacetylene welder safely.
2. Terminology
   1. Teacher Reference
   2. Student Reference
3. Safety
   1. Topic Objectives - Upon completion of this unit, students will be able to:
      1. Pass a safety test on oxyacetylene welding and Cutting
   2. Oxy-Fuel Safety (Rules, Teacher Notes-Word)  (Rules, Student Notes-Word) (Oxy-Fuel Safety-PPT) (Safety Test)
4. Oxy-Fuel Gasses
   1. Topic Objectives - Upon completion of this unit, students will be able to:
      1. Pass a safety test and demonstrate proper use of arc welding equipment.
      2. Be able to identify the components of a welding circuit and their function(s).
   2. Oxy-Fuel Gasses (Teacher–Word)  (Student-Word)  (PPT)
5. Oxy-Fuel Set Up and Operation
   1. Topic Objectives - Upon completion of this unit, students will be able to:
      1. Identify the basic components of the oxyacetylene welding apparatus.
      2. Set up, use, shut off, and store an oxyacetylene welder properly.
      3. Clean the orifices in welding and cutting heads, using the approved technique.
   2. Oxy-Fuel Set Up (Teacher-Word)  (Student–Word)  (Part I-PPT) (Part II-PPT)
   3. Oxy-Fuel Start Up and Shut Down (Teacher-Word)  (Student–Word)  (PPT)
6. Running a Bead
   1. Topic Objectives - Upon completion of this unit, students will be able to:
      1. Run a bead with the oxyacetylene equipment with and without filler rod.
      2. Use the oxyacetylene equipment to do four basic welds other than a bead.
   2. Oxy-Fuel Running a Bead (Teacher-Word)  (Student–Word)  (PPT)
7. Oxy-Fuel Cutting
   1. Topic Objectives - Upon completion of this unit, students will be able to:
      1. Make a straight cut, using the cutting head.
      2. Make a bevel cut, using the cutting head.
      3. Pierce a hole in steel plate.
      4. Cut sheet metal (14 ga. or thinner) with the cutting head.
   2. Oxy-Fuel Cutting (Teacher-Word)  (Student–Word)  (Part I-PPT) (Part II-PPT) (Part III-PPT) (Part IV-PPT) (Part V-PPT)
8. Brazing
   1. Topic Objectives - Upon completion of this unit, students will be able to:
      1. Use oxyacetylene equipment to braze mild steel.
   2. Oxy-Fuel Brazing (Teacher-Word)  (Student–Word)  (PPT)

Worksheets

Unit Assessment

• Oxy-Fuel Final Project (Instructions-CAD) (Instructions-PDF)
• Oxy-Fuel Unit Test (Word)

Skill Assignments / Projects

Objective: Use the oxyacetylene equipment to do four basic welds other than a bead.

Oxy-Fuel Welding & Cutting Assignment (Instructions-CAD) (Instructions-PDF)

Objective: Construct a simple project requiring cutting and welding.

(Plans-CAD) (Plans-PDF)

California Ag Mechanics Curriculum Project