MANUFACTURING ENGINEERING

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MANUFACTURING ENGINEERING
(Section 3.4)
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Industrial Processes

• Manufacturing engineering has to choose from a
  variety of processes to transform material into
  the desired size and shape
• Refining and Alloying
• Steel iron ore, blast furnace, pig iron, made
  steel in another furnace (open hearth, basic
  oxygen or electric arc)
• Alloy is a combination of two or more metals to
  achieve better properties (e.g. hardness)
• Tensile Strength The ability of the material to
  withstand elongation forces
• Hardness The ability of the metal to withstand
  penetration forces
• Impact resistance The ability of the material to
  absorb energy
• Malleability The ability of the metal to be
  shaped and or extended
• Fatigue resistance The ability of the metal to
  withstand repeated applications of forces
• Corrosion resistance The ability of the metal to
  withstand corrosive forces.

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Industrial Processes

• Casting
• Process of forming objects by pouring liquid
  material into a mold and allowing the material to
  solidify desired shapes
• Sand molding is expensive as mold is destroyed
  each time
• Other types Centrifugal, die, gravity and mold
  etc.
• Metal Forming
• Working on metal under pressure to form a desired
  shape, to improve the physical properties or both
  hot or cold

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Industrial Processes

• Metal Cutting
• Removal of metal by using a cutting tool such as
  shearing, turning, drilling, etc.

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Industrial Processes
Milling
Turning
Grinding
Drilling
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Industrial Processes

• Welding
• Process by which two pieces of the same metal are
  made to bond through the application of heat,
  pressure, or both

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Industrial Processes
Arc Welding
Spot Welding
Electrodes for Seam Welding
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Industrial Processes

• Assembly
• The process by which various parts and
  subassemblies are brought together to form a
  completed assembly or product
• Welding, screwing, gluing, riveting etc.
• Assembly may be done in a batch or in a
  continuous process (assembly lines)
• Finishing
• Set of processes in which the material, either as
  a completed product, subassembly or component
  part, is made more effective or presentable
• Honing and lapping are similar to grinding
  polishing, buffing, brushing etc.
• Surface cleaning remove dirt and scale
  spraying, vapor degreasing
• Coating provide decoration, protection and
  texture etc. painting and plating