Engineering Unit 1

Engineering Unit 1

1. Engineering Sectors: Defined by the final product

   • Aerospace
     • Planes, helicopters, rockets
   • Automotive
     • Cars, Motorbikes, Lorrys
   • Communications
     • Phones, satellites and PCs
   • Electrical
     • Televisions, Calculators and Microwaves
   • Mechanical
     • Engines, robots
   • Biomedical
     • MRI Scanners, Artificial limbs
   • Chemical
     • Petroleum, Medicines and cleaning fluids

2. Machining Processes

   • Turning: Uses a lathe to produce a cylindrical shape. The work piece is rotated wile being machined with a cutting tool.
   • Milling: Rotating cutter that produces simple and complex shapes. The workpiece is fixed in place and fed under the cutter.
   • Drilling: Creates circular holes in the workpiece using a drill bit. To achieve a higher quality, the drill bit must be sharp. The higher-quality drill bits are expensive.
   • Safety
     • Accidents caused by: Loose clothes snagging, flying material in eye, hand contact with revolving parts and minor burns from hot surfaces.
     • Preventing Accidents: Follow safety procedures, wear protective clothing & equipment and ensure guards are in position before operating the machinery.

3. Forming Processes

   • Casting: Liquid metal is poured or injected into a mould. Once cooled, the shaped metal is removed from the mould. Thee is very little waste and detailed shapes can be produced.
     • Sand Casting: Used for larger parts with less accuracy. E.g. Manhole covers
     • Semi-permanent and Permanent mould casting: Used to produce products or components that are used or involve water pressure. E.g. Pressure Valves.