CONCEPTUALIZATION OF COMPARATIVE MEASUREMENTS OF ARTEFACTS INTENDED FOR INSPECTION OF CMM LENGTH MEASURING CAPABILITY

ABSTRACT Inspection of CMMs length measurement capability is performed using various one-, two-or threedimensional material standards of size (artefact

Maturity determination and information visualization of new forming processes considering uncertain indicator values

Operative or strategic decision-making during the development of novel objects is complicated and mostly based on fuzzy assumptions or uncertain information. Consideration of information uncertainty would enhance the reliability of any evaluation of the current development status of new objects. Decisions could be made with a higher safety. The development status equates to the maturity and is to be assessed by previously elicited indicators in relation to phase-dependent requirements. Within this paper, a reference-model based maturity method considering uncertain indicators is introduced for enabling the determination and assurance of the development status in a quantitative and systematic way. The method is applied within the development of a novel metal forming process namely the Sheet-Bulk Metal Forming, which aims to unite the advantages of sheet metal and bulk metal forming. Additionally techniques for visualizing the determined maturity value are proposed to support subsequent decision processes in the context of maturity assurance or improvement

T.: Blended-Learning Course Mess-iN - Advanced vocational training in industrial metrology

ABSTRACT For the correct performing of measurement tasks, the operator needs a lot of knowledge. As so far in Keywords: Metrology, Blended Learning, Advanced Training INITIAL SITUATION Reliable and reproducible measurement results are an essential basis for the establishing of an efficient quality management and thus for the manufacturing of high quality products. To achieve these, the operator needs on one hand extensive skills in the handling of his measuring machines and devices, on the other hand profound metrological knowledge to choose an apt measuring device, to set up a proper measuring and evaluation strategy and generally to avoid mistakes and thereby reduce influences on the measurement. Whereas a lot of courses regarding the handling and programming of the machines are provided by the various manufacturers, there are rarely any training offers aiming at the imparting of fundamental knowledge for manufacturing metrology. Thus, the operators have to gather the needed information mainly by themselves, as so far there is no basic vocational education for metrologists in Germany. Of course this does not always lead to a satisfactory understanding of complicated subjects. Therefore quite often problems occur, mainly regarding the correct planning of the measurement in reference to product specifications given by drawings and the interpretation of acquired results. These may lead to different measurement results between customer and supplier. Via the course 'Mess-iN' (Metrology -Learning in a network), there shall be provided a comprehensive concept for advanced vocational training in manufacturing metrology, focused on the needs of operators in industrial measuring regarding both contents and design of methodology. Thereby also the framework for the future development of a standardized, commonly accepted vocational training in manufacturing metrology shall be laid. 66

Optical Multi-Sensor Metrology for Extruded Profiles

Nowadays the process-control of concave extruded profiles is a measuring task with rising requirements. A novel optical bi-sensorial measurement system – consisting of a shadow- and a light-section-system – as well as suitable methods of analysis for in-line inspection are presented. The proposals help to ensure the product quality on a higher level than before. The combination of dimensional accuracy and data-density leads to excellent results. Extruded profiles are semi-finished products (from steel, brass, aluminum, synthetics…) which are appointed for wide applications in technical products. For monitoring and controlling the parts in-line adequately, today often the shading technology is used. It detects – neglecting the profiles coat in measurement range – with high precision the dimension of the objects shadow orthographically to the axis of illumination. As a matter of fact, concave and local areas cannot be recorded. Alternatively, light-section-systems can measure concave zones and undercut zones but do not comply with the required accuracy. The combination of accuracy and data-density qualifies the mentioned multi-sensor metrology for realizing a maximum of efficiency in process control what ensures product quality and less defective goods. The optical multi-sensor measurement system has to be calibrated and aligned to detect the same surface zone despite of high refresh rates and optical resolutions. The metered characteristics will be coordinate transformed to extrinsic world-coordinates for evaluating form deviations of complex parts. An appropriate user-interface enables to re-calculate measurement objects in-line and evaluate the conformity of the part consequently. Finally the real length information assists to influence the process control. After a successful test in the laboratory the results will be proved in production to the target: measurement uncertainty of better than 0.1 mm at every profile