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Mar 29, 2024
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AUT 140 - Welding for Automotive Mechani Credits: 2 Lecture Hours: 0 Lab Hours: 4 Practicum Hours: 0 Work Experience: 0 Course Type: Voc/Tech Skills will be developed in oxy-acetylene fusion and braze welding, shielded metallic arc welding, as well as oxy-fuel flame cutting. Safety is emphasized and basic welding theory is discussed. Warnings concerning the danger and liability involved in welding high-strength steels will be stressed (auto body and chassis, etc.). Competencies
- View required videos and do the workbook assignments
- Study pages 4 through 6 of safety handout
- Demonstrate an understanding of safety and equipment.
- Demonstrate proper set up, start up and shut down procedures for Oxy-Acetylene equipment
- Demonstrate the proper set up and shut down for the instructor in the lab.
- Demonstrate lighting torch, adjusting flame and proper shut down
- Perform manual flame cutting on various thicknesses of steel.
- Set up cutting torch with proper tip and Oxy-Acetylene pressures.
- Manually flame cut sheet metal, ¼”, ½”, bevels and pierce holes.
- Reproduce cuts for instructor
- Shielded Metal Arc Welding
- View videos #1 and #2 and do work book assignments.
- Explain the safety rules and setup of welding machine power sources.
- Demonstrate the setting of AC and DC currents and how they are used.
- Classify and select electrodes
- View video #3 and complete workbook assignment.
- Explain electrode numbering system to the instructor
- Match electrodes to the right polarity
- Stringer beads, stops and starts
- View video #4 and complete workbook assignment.
- Make stringer beads using 1/8? E-6013, E-6010 and E-6011.
- Practice stops and starts using 1/8” E-6013, E-6010 and E-6011.
- Weld lap and tee joints in the flat position
- View videos #8 and #14 and complete workbook assignments
- Produce a lap joint in the flat position using 3/16” material and 1/8” E-6013, E-6010 and E-6011
- Produce a T-joint in the flat position using 3/16” material and 1/8” E-6013, E-6010 and E-6011
- Multi-pass T-joints in the flat position using 1/8” E-6013, E-6010 and E-6011.
- Lab test over SMAW for final grade
- Gas Metal Arc Welding
- View videos #1, #2, #3, #4 and complete the workbook assignments.
- Explain the safety rules to observe when using GMAW equipment.
- Describe what personal safety gear to use when using GMAW equipment.
- Set up and shut down of GMAW equipment
- Explain the proper set up and shutdown of GMAW equipment.
- Name the two main components of GMAW
- Selection of gases and flow rates for GMAW
- Identify some of the gases used with GMAW
- Describe proper handling of GMAW shielding gas cylinders.
- Demonstrate how to place regulator on gas cylinder and how to set correct flow rate
- Functions of DC current and it’s relation to GMAW.
- Explain what two types of power sources are used with GMAW.
- Explain what type DC current is used for different metals
- Demonstrate how to change polarity on GMAW equipment
- Electrodes sizes and their relation to material thicknesses.
- Explain how to choose correct electrode diameter.
- Explain what amperage settings are used for the electrode being used.
- Welding stringer beads, stops and restarts in the flat position.
- Select .035 wire, 75/25 shielding gas and 3/16” plate.
- Place gun nozzle in the pushing position and run stringer beads.
- Place gun nozzle in the pulling position and run stringer beads.
- Practice stops and restarts both pushing and pulling.
- Single pass on lap and T-joints in the flat position
- Select .035 wire, 75/25 shielding gas and 3/16” x 2” x 6” metal
- Position metal to form lap joint and push stringer beads both sides.
- Position metal to form lap joint and pull stringer beads both sides.
- Position metal to from T-joint and push root pass
- Position metal to form T-joint and pull root pass
- Multi-pass T-joint
- Select .035 wire, 75/25 gas and 3/16” x 2” x 6” metal.
- Position metal to form a T-joint
- Weld root pass, 2nd and 3rd pass forming multi-pass weldment.
- Vertical down welds on lap and T-joints, multi-pass vertical down welding on T-joints.
- Select .035 wire, 75/25 gas and 3/16” x 2” x 6” metal.
- Place lap joint in the vertical position and weld from top to bottom.
- Place T-joint in vertical position and weld from top to bottom.
- Place T-joint in vertical position and weld from top to bottom with multi-pass welding
- Sheet metal welding (if time permits).
- Select .030 wire, 75/25 gas and 16 gauge sheet metal 2” x 6”.
- Place metal to form lap joint and T-joint and weld in the flat position.
- Place metal to form lap joint and T-joint and weld in the vertical down position.
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