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Metrology - PowerPoint PPT Presentation


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Metrology. Metrology is the science of measurement Dimensional metrology is that branch of Metrology which deals with measurement of “dimensions“ of a part or workpiece (lengths, angles, etc.)

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Presentation Transcript
metrology
Metrology
  • Metrology is the science of measurement
  • Dimensional metrology is that branch of Metrology which deals with measurement of “dimensions“ of a part or workpiece (lengths, angles, etc.)
  • Dimensional measurements at the required level of accuracy are the essential link between the designers’ intent and a delivered product.
aspects of metrology
Aspects of Metrology
  • Reference standard metrology
  • Engineering Metrology
basic measurement devices
Basic Measurement Devices
  • Surface Plates
  • Test Stands
  • Dial Gages
  • Micrometers and Verniers
  • Gage Blocks
dimensional metrology needs
Dimensional Metrology Needs
  • Linear measurements
  • Angular measurements
  • Geometric form measurements
    • Roundness
    • Straightness
    • Cylindricity
    • Flatness, etc
dimensional metrology needs5
Dimensional Metrology Needs
  • Geometric relationships
    • Parallel, perpendicular, etc.
    • Concentric, runout, etc.
  • Controlled surface texture
communicating dimensional metrology needs
Communicating Dimensional Metrology Needs
  • Geometric Dimensioning and Tolerancing (GDT)
  • “The language of dimensional metrology”
  • Standard symbols, etc., on part drawings.
roundness specification
Roundness Specification

Roundness applies to every section

surface profile with datums
Surface Profile with Datums

Profile of a line with datums is similar