CT Inspection Becoming Mainstream After Decade of Developments

Coordinate measuring machines with computed tomography sensors are becoming an indispensable part of modern quality control. When the Werth TomoScope 200 was first presented at the Control trade show in Sinsheim in 2005, a new era in coordinate measuring technology began.

In the last ten years entirely new possibilities have been opened up for complete, non-destructive measurement and inspection of workpieces. Over the past decade computed tomography has achieved even lower measurement deviations. For example when measuring spray hole geometries for automotive diesel fuel injectors in a production environment, measurement deviations of about 0.5 µm are achieved.

Various methods for expanding the range of CT application, such as raster and ROI tomography, have also been developed, along with a series of machines for a wide range of applications.

Coordinate measuring machines with computed tomography are extremely flexible offering high-precision measurements, rapid initial sample inspection, process validation, and analysis of work-pieces for completeness or defect.

The core machine components, such as the X-ray tubes, detector, and rotary axis can be selected individually for the machines in the Werth TomoScope and TomoCheck series providing a customer bespoke solution. Machines are available to meet very stringent requirements for resolution, measurement uncertainty, or for measuring large objects. For metal parts that are particularly difficult to penetrate, machines with up to 450 kV of acceleration voltage are also available. All machines are calibrated by Werth in their in house DAkkS lab, currently the first and only lab providing this level of calibration to industry.

Through the use of high-precision air bearing technology, the TomoCheck can achieve MPE E accuracies of 2.5 + L/150 µm.

For more information: www.werthinc.com