Week 4: Sheet Metal Fabrication

  • Q: What is sheet metal?
    A: A thin, flat material made from metal, available in sheets or coils.

  • Q: What are the two common forms of sheet metal?
    A: Flat sheets and coils.

  • Q: How is sheet metal thickness measured?
    A: By gauge or millimeters.

  • Q: What is the purpose of corrugation in sheet metal?
    A: To increase strength by creating rigid patterns.

  • Q: What is springback in sheet metal bending?
    A: The material's tendency to return slightly to its original shape after bending.

  • Q: What factors influence springback?
    A: Material stiffness and bend radius.

  • Q: What is the difference between shearing and punching?
    A: Shearing creates straight cuts, while punching removes specific shapes.

  • Q: What is laser cutting used for in sheet metal fabrication?
    A: Precision cutting of intricate designs.

  • Q: What is waterjet cutting?
    A: A high-pressure water stream with abrasive filler used to cut materials.

  • Q: What is the purpose of perforated sheet metal?
    A: To reduce weight, allow airflow, or add decorative patterns.

  • Q: What is a hem bend?
    A: A folded edge for reinforcement or safety.

  • Q: What is the purpose of a step bend?
    A: To create a stepped profile in the material.

  • Q: What are jog bends used for?
    A: Creating offsets in a sheet.

  • Q: What is spot welding?
    A: A technique that uses heat and pressure to join two sheets of metal.

  • Q: What are Pem fasteners?
    A: Inserts used to join sheet metal components.

  • Q: What is a CO2 laser, and what is it used for?
    A: A laser cutter for wood, plastic, and thin metals.

  • Q: Why is bending important in sheet metal?
    A: It creates shapes and adds strength to components.

  • Q: What is a burnished zone in shearing?
    A: A polished edge resulting from plastic deformation.

  • Q: What are rivet machines used for?
    A: To fasten metal components together.

  • Q: Why is air ventilation crucial during laser cutting?
    A: To remove fumes and prevent overheating.

  • Q: What is a grommet, and where is it used?
    A: A reinforced hole, often found in tarps and curtains.

  • Q: What is bending allowance?
    A: Extra material calculated for bends to avoid distortion.

  • Q: Why are cutting simulations important in CAM?
    A: To detect potential errors before fabrication.

  • Q: What is deep drawing?
    A: A method for forming sheet metal into deeper shapes like cups.

  • Q: What is stamping?
    A: Using a die to press shapes into sheet metal.

  • Q: What are gussets used for?
    A: To reinforce joints or add strength to structures.

  • Q: What is CNC sheet metal cutting?
    A: Automated cutting controlled by digital instructions.

  • Q: What is the purpose of a flange in sheet metal?
    A: To add strength or create a mounting surface.

  • Q: What is bead rolling?
    A: Creating ridges in sheet metal for rigidity.

  • Q: What are the safety precautions for sheet metal work?
    A: Wear gloves, goggles, and ensure proper ventilation.