Product Inspection
What is Product Inspection?
Product Inspection- also known as deviation analysis - provides a graphic comparison of physical part data to a nominal CAD model. Digitizing / Scanning data that represents the physical production part geometry is compared to the original design (CAD geometry) to verify part conformance relative to design specifications and confirms whether critical tolerances and quality standards are being met.
Full dimensional layouts can also be provided in First Article Inspection (FAI) and Product Parts Approval Process (PPAP) formats.
Why is it useful?
Comparison of the physical data with the design model results in a three-dimensional deviation map that has excellent color separation and is high resolution. Our color error maps literally provide a thousand dimensions at a glance . 2D Section Views are used to highlight specific feature non-conformances. Accompanying dimensions call out the precise amount of deviation. The data collected can also be used as a template for updating a 3D CAD model that is no longer current
What do you need to perform an inspection?
You will need at least two entitles. One entity will be used as a Subject and the other will be used as a Reference. The subject is compared to the reference.
The entities can be –
- Data from a physical part
- Data from a 3d CAD model
Process Overview
Types of inspections
Part to CAD - Data from a physical part is compared to a CAD model
Part to part - Two cavities of the same or similar parts are compared to each other.
Assembly Inspection - An assembly of parts is compared to an assembly of CAD models.
Clearance / Interference - A "virtual assembly" is performed with the scan data collected from physical parts to determining clearance or interference between two parts, assembly components, etc.
CAD to CAD - Two revisions or version of CAD files are compared to each other to determine the differences.
Inspection with a Profilometer - For characterizing very small variance on the surface. Such as a scratch, texture, patterns, etc.
Dimension verification with spreadsheet - A spreadsheet is created with a layout of critical dimension and a OK/FAIL results based on the part tolerance and specification.