Metrology

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# Metrology - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about 'Metrology' - overton

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Presentation Transcript
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
• Reference standard metrology
• Engineering Metrology
Basic Measurement Devices
• Surface Plates
• Test Stands
• Dial Gages
• Micrometers and Verniers
• Gage Blocks
Dimensional Metrology Needs
• Linear measurements
• Angular measurements
• Geometric form measurements
• Roundness
• Straightness
• Cylindricity
• Flatness, etc
Dimensional Metrology Needs
• Geometric relationships
• Parallel, perpendicular, etc.
• Concentric, runout, etc.
• Controlled surface texture
Communicating Dimensional Metrology Needs
• Geometric Dimensioning and Tolerancing (GDT)
• “The language of dimensional metrology”
• Standard symbols, etc., on part drawings.
Roundness Specification

Roundness applies to every section

Surface Profile with Datums

Profile of a line with datums is similar