Week: 3 Metal Fabrication

What is CNC machining?

Computer-controlled cutting to shape materials.

What is the purpose of cutting oil?

To reduce friction and heat during metal cutting.

What is a vertical mill?

A machine for precision metal cutting along three axes (X, Y, Z).

What is a lathe used for?

Rotating materials for machining circular parts.

What is the difference between drilling and milling?

Drilling creates holes; milling creates complex shapes.

What are rivets?

Fasteners used to join metal components.

What is TIG welding?

A precise welding method using tungsten electrodes.

What is MIG welding?

A faster welding process using a wire electrode and shielding gas.

What are SMAW electrodes coated with?

Flux, which protects the weld from oxidation.

What is ultrasonic welding?

A method that uses high-frequency sound to join plastics or metals.

What is the purpose of shearing in sheet metal?

To cut straight edges.

What is laser cutting best for?

Precision cuts in thin materials.

What is a toolpath?

A programmed route for CNC machine tools.

Why are grommets used?

To reinforce holes in fabric or metal.

What is open-cell foam?

Foam with interconnected pores, used for cushioning.

What are Pem fasteners?

Durable inserts used to join metal sheets.

What is the purpose of annealing metal?

To soften it for easier machining.

What is springback in metal bending?

The tendency of metal to return slightly to its original shape after bending.

What are burrs in machining?

Sharp edges left after cutting.

Why is TIG welding slower than MIG welding?

It requires more manual precision.

What is a stress-strain curve?

A graph showing how a material deforms under load.

What does the ultimate tensile strength indicate?

The maximum stress a material can withstand before breaking.

What is a punch press used for?

Creating holes or shapes in metal.

Why is heat treatment used in metal fabrication?

To improve hardness or ductility.

What is the function of a drill press?

To create precise vertical holes.

What is the role of flux in welding?

To protect the weld area from contamination.

What are die tools in machining?

Shaped cutting tools for forming parts.

What is the function of end mills?

Cutting, shaping, and finishing edges during milling.

What are weld beads?

The seam created by welding two materials.

What is the purpose of tapping in metal fabrication?

To create internal threads in holes.