Bolton Works offers both contact and non-contact measurement techniques for the inspection of complex geometries. For contact measurement a high accuracy CMM is used, with allows inspection of parts with tight tolerances. For a more complete overview of part deviations, scanning might be more appropriate. The use of colormaps allows to quickly get a feel for deviations within a part and pinpoint problematic areas.
CMM InspectionThe Zeiss Contura CMM In use at Bolton Works features a very robust machine design. Ceramic guide ways in X and Z provide rigidity and protection against production-related environmental influences. Air bearings on all axes for high stability at high travel speeds. Equipped with a scanning head it allows for high density data sampling and is therefore ideally suited for profile measurement of blades and vanes. Part size which can be measured is limited by the CMM’s travel of 27.5 × 27.5 × 23.5”.
Measurement uncertainty: 2.0+L/300 at 18 – 22 °C (0.091+L/300 at 64 – 79 °F)
White Light Scanning3D point calculation by triangulation
The technology currently most commonly used in 3D scanners is based on the principle of triangulation. A point on the surface of the object is observed with 2 cameras. The coordinates of this point can be calculated relative to the basis b.
Instead of working with a single point, one could project a line on the surface with a laser. Seen from the perspective of the laser, the line would appear straight. However, the same line observed under an angle by the camera will appear deformed depending, on the surface topology. Multiple points can be calculated from the amount of deformation.
“White Light” scanners, also called structure light scanners, expand on this principle. No lasers are used, but instead they rely on a very bright light source (White Light), which is used to project a well defined line pattern onto the surface, using a slit plate or digital projection system. The intersection of these lines on the surfaces, enables the evaluation of multiple lines in one step and therefore makes the data acquisition faster.
The use of a robot allows the setup and automated scanning of larger quantities of similar parts. The robotic setup in use at Bolton Works can be used for a variety of parts ranging from injection moldings, castings and forgings. Automated report generation provides consistent and fast results within minutes after scanning has been completed.
The output of the scanning process can be a complete dimensional report. If the user wants to use its own resources to further work with the scan data, we can provide a high quality STL file.
Pricing for robotic inspection starts as low as $50.00 depending on quantities and required output.