Week 4: Sheet Metal Fabrication

What is sheet metal?

A thin, flat material made from metal, available in sheets or coils.

What are the two common forms of sheet metal?

Flat sheets and coils.

How is sheet metal thickness measured?

By gauge or millimeters.

What is the purpose of corrugation in sheet metal?

To increase strength by creating rigid patterns.

What is springback in sheet metal bending?

The material's tendency to return slightly to its original shape after bending.

What factors influence springback?

Material stiffness and bend radius.

What is the difference between shearing and punching?

Shearing creates straight cuts, while punching removes specific shapes.

What is laser cutting used for in sheet metal fabrication?

Precision cutting of intricate designs.

What is waterjet cutting?

A high-pressure water stream with abrasive filler used to cut materials.

What is the purpose of perforated sheet metal?

To reduce weight, allow airflow, or add decorative patterns.

What is a hem bend?

A folded edge for reinforcement or safety.

What is the purpose of a step bend?

To create a stepped profile in the material.

What are jog bends used for?

Creating offsets in a sheet.

What is spot welding?

A technique that uses heat and pressure to join two sheets of metal.

What are Pem fasteners?

Inserts used to join sheet metal components.

What is a CO2 laser, and what is it used for?

A laser cutter for wood, plastic, and thin metals.

Why is bending important in sheet metal?

It creates shapes and adds strength to components.

What is a burnished zone in shearing?

A polished edge resulting from plastic deformation.

What are rivet machines used for?

To fasten metal components together.

Why is air ventilation crucial during laser cutting?

To remove fumes and prevent overheating.

What is a grommet, and where is it used?

A reinforced hole, often found in tarps and curtains.

What is bending allowance?

Extra material calculated for bends to avoid distortion.

Why are cutting simulations important in CAM?

To detect potential errors before fabrication.

What is deep drawing?

A method for forming sheet metal into deeper shapes like cups.

What is stamping?

Using a die to press shapes into sheet metal.

What are gussets used for?

To reinforce joints or add strength to structures.

What is CNC sheet metal cutting?

Automated cutting controlled by digital instructions.

What is the purpose of a flange in sheet metal?

To add strength or create a mounting surface.

What is bead rolling?

Creating ridges in sheet metal for rigidity.

What are the safety precautions for sheet metal work?

Wear gloves, goggles, and ensure proper ventilation.