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Explore the concept of geometric forms such as straightness, flatness, circularity, parallelism, and squareness in precision measurements. Learn the tests and tools used for each form to ensure accuracy.
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Different Geometric Forms • Straightness • Flatness • Circularity • Parallelism • Squreness
Straightness • A line is said to be straight over a given length if its deviation with respect to ideal reference line are within the specific tolerance limit
Test for Straightness • Using the straight edge • Wedge method • Use of spirit level
Flatness • Flatness It is defined as minimum distance between two planes within which all the points on a surface lie. A surface along which all the points lie along single plane is called as perfectly flat surface.
Test for Flatness • Using a surface plate • Straight edge • Dial gauge • Spirit level • Autocollimator • Interference method
Squareness • Checking of squareness or squareness testing implies checking weather the one plane is right angle to another.
Test for Squareness • Try square • Combination square • Indicator method • Autocollimator
Parallelism • Two line axis or plane are said to be parallel two each other if the distance measure between them in a perpendicular plane remain same.
