Turning to Industrial CT Scanning for your first article inspection projects is a cost effective solution compared to CMM Inspection
Where traditional inspection methods could take up to weeks, first article inspection services through industrial CT scanning can be completed in a shorter matter of time giving you instant results on hundreds of GD&T points once a measured plan has been created around the part print and applied to the scanned data.
PPAP & AS9102
In the automotive industry it enables validation of the first parts in the production part-approval process (PPAP) or full first article inspection such as AS9102 in the aerospace industry to quickly and accurately validate a part before it goes into production. It also validates measurements for highly complex part geometries found in the medical industry.
Inspection costs involving GD&T can be drastically reduced because you are obtaining a complete and accurate 3D model of your part’s internal and external geometries without needing to destroy the part (Industrial CT Scanning is a non-destructive testing method NDT). There are no external measuring forces to distort the attributes of the part – distortions that can cause inaccurate measurements which could inevitably cost you.
What sets Industrial CT Scanning apart from other methods?
Once the scan is completed, a GD&T program is written around the CT scan dataset and referenced to the part print for each GD&T callout. From there, the GD&T program is instantaneously applied to future scans of the same part, saving time and money for programming.
The challenges in first article inspection mostly come from using existing technologies that cannot complement the part’s quality assurance requirements in a cost effective manner. One particular inspection method that seems to be struggling to meet such measurement requirements in a cost effective manner is GD&T.
The illustration above compares the ease of measurement over multiple part inspection when using a CMM, vs. industrial CT based on complex callouts needed through GD&T of first article inspection .
As you can see, a CMM is a viable solution but only up to a certain point. Then the time and costs multiply drastically as the measurement requirements become more complex. Thus we cannot dismiss the role industrial CT plays with GD&T and the accuracy and cost effectiveness that must accompany first article inspection measurement.
Case in point: Concentricity
Concentricity is seldom used in GD&T part prints because the difficulty of inspecting the part properly and the time required to perform the inspection are both extremely high. Because of this, most part print designers avoid using this symbol and use several other GD&T callouts to hold similar boundaries. With industrial CT, a GD&T program can be developed for concentricity inspection almost as simply as measuring a basic dimension between two points.
Industrial CT Scanning plays an integral part in GD&T when it comes to inspecting highly complex parts with multiple inspection points that need to meet the measurement requirements. Industrial CT scanning is setting a new standard in qualifying pre-production parts quickly and accurately while reducing inspection costs. This is achieved by using the right technology, expert analytical support, and proper calibration of scan data to ensure accuracy. The accuracy, efficiency and reduced turnaround times provided by industrial CT Scanning ensures that it will continue its trend of becoming a required tool for inspection, as industry leaders are identifying both the value in inspection standards and the cost-effectiveness it offers.
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