Coordinate Measuring Machine Layout Protocols for Flexible Plastic Part Boundaries
Flexible plastic part boundary metrology requires ISO 10579 restrained datum targets and controlled clamping forces to yield repeatable CMM dimensional data.
Flexible Plastic Metrology
Meaning
Measurement of non-rigid polymeric components requires specialized clamping and non-contact scanning methods to prevent part distortion. Implementing flexible plastic metrology ensures that dimensions are recorded without the measuring force of a physical probe bending the part. This method evaluates the true shape of elastomers and thin-walled containers.
Fixturing Technique
Holding a pliable plastic part in its design intent position requires dedicated nesting fixtures. In flexible plastic metrology, these fixtures simulate the assembly conditions of the part to ensure repeatable measurement results. The fixture holds the part securely without introducing artificial stress or deflection.
Quality Standards
Verifying the compliance of molded seals and gaskets requires different protocols than those used for rigid metal parts. Standardizing the flexible plastic metrology workflow allows molders and customers to align on inspection criteria. This alignment prevents disputes over dimensional variations that only occur when the part is unconstrained.
Measurement Execution
Non-contact optical scanners capture thousands of data points on pliable surfaces without applying physical pressure. When performing flexible plastic metrology, the operator programmatically applies restraint rules to align the scan to the CAD model. This technique allows for the inspection of complex curves that are impossible to measure with traditional calipers.
The resulting deviation maps show exactly where the part falls outside of tolerance.