Meaning
Quality control framework addresses the inspection of flexible parts that deform under their own weight or during the measurement process. Implementing non-rigid metrology is necessary for large thin walled plastic panels and soft elastomeric gaskets. These components do not hold a stable shape when they are unsupported.
Material Deformation
Gravity and internal stresses cause flexible parts to sag or twist once they are removed from the mould. In non-rigid metrology, the inspection plan accounts for this movement by using specialized fixtures. The goal is to measure the part in its functional or assembled state.
This approach prevents the rejection of parts that are actually within tolerance when installed.
Fixturing Requirement
Rigid supports and clamps hold the component in a repeatable position during the scan or probe cycle. Because non-rigid metrology relies on these constraints, the fixture itself must be certified and stable. The net pads and locators represent the points where the part attaches to the vehicle or machine frame.
Data collected while the part is restrained provides a true picture of the manufacturing quality. This technique eliminates the noise caused by the inherent flexibility of the resin. Large automotive bumpers and interior trims are typical candidates for this type of inspection.
High precision is achieved by simulating the installation conditions exactly.
Inspection Accuracy
Advanced software can mathematically remove the effects of gravity from the measurement data. By combining physical restraint with digital compensation, non-rigid metrology delivers reliable results. High confidence in the data allows for faster process approval.
