Page 35 - Issue 13
P. 35

  The high-power X-ray tube of the new Werth Tomo-Scope® FQ (Fast Qualifier) series has a power of more than 1.5 kW. This allows for a shorter exposure time for each X-ray image and thus for measurements with computed tomog- raphy (CT) in tens of seconds.
The integration of a shutter eliminates the time-consuming starting cycles of the X-ray source. This also results in an extended service life, as wear is significantly reduced.
The maintenance-free X-ray tube ensures a high uptime. With the acceleration voltage of 225 kV or optionally 300 kV, even dense materials and large workpieces can be measured.
For inline measurements, the measuring programs can be prepared remotely from the machine at an offline workstation. The workpieces can be inserted into the safety area around the robot via a conveyor belt. There the measuring machines are loaded automatically.
CT coordinate measuring machines record X-ray images of the workpiece in different rotational positions and combine them to form a complete workpiece volume includ- ing internal geometries.
Measuring points at the material transitions are determined using a patented sub-voxel- ing process. The measuring and evaluation process is then started, for example, by
1. Preparation of workpiece and program
2. Introduction of workpiece
3. Measurement with multisensor metrology and
computed tomography 4. Removal of workpiece 5. Analysis and verification
means of a QR code scanner. The work pieces can also be identified later via the QR code.
The new TomoScope® FQ series allows for an up to 50 times faster calculation and evaluation of the measuring point cloud. In a production cycle of 30 seconds, geo- metric properties are checked and an actual-to-actual comparison is carried
out in order to check the work-pieces for defects.
In the WinWerth® Scout user interface, a list of the measured workpieces can be dis played at all work-stations in the network. WinWerth® Scout enables a fast and sim- ple check of the measurement results, for example by the shift supervisor. Workpieces that lie outside the tolerances are marked in colour.
Measurement and inspection take place in the same software so that the traceability of the results is guaranteed throughout, and only one software license is required. The uniform software also enables task sharing between CT and multisensor coordinate measuring machines.
The measurement results of all coordinate measuring machines for a workpiece are documented in a common protocol.
Inline measurements with computed tomography are not only advantageous for complex geometries but also for large quantities and heavy workpieces such as valve blocks, housings and castings. With the Werth TomoScope® FQ series such workpieces can be measured in approx. 30 seconds.
A measurement in one run of multiple smaller workpieces is also
extremely time-saving. This results
in a typical measuring time of 1.5 seconds per workpiece.
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The engineers can then produce up to date CAD designs of traditional legacy car plat- forms. This provides great insight into the current build process and gives a planning method for repeatability.
Model-based workflow maintains digital continuity in Verisurf software which is based on a CAD platform. It supports Model-Based Definition (MBD) workflow, which is key to maintainng data integrity and relevance as part of the overall design
and manufactur- ing process.
When using MBD, the CAD model is the nominal to which all parts are measured and inspected against, keeping
the all-important digital thread intact - from design to manufacturing to inspection and quality reporting.
Everything that defines the part exists in a single digital archive, including how to man- ufacture and inspect the part. Based on its CAD platform and MBD functionality, the software is well suited for scan-to-CAD reverse engineering, inspection, tool build- ing, and assembly guidance.
For more information contact Metrology UK on 01684 891372 or email info@metrolo-

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