Contactless Surface Measurements

Surface topographies and micro-geometries can be captured by the Confovis optical 3D measuring technique to accuracies of single-digit nanometers. In this way, form and roughness can be determined in one system. The measuring software ConfoVIZ® calculates a point cloud from the Z coordinates captured confocally and by focus variation; the point cloud characterizes the captured 3D surface. The 3D point cloud can be evaluated by the MountainsMap® analysis software. In addition, actual outlines can be referenced to CAD target data and a feature-based evaluation made by the GOM® software. For time-saving measurements, relevant data areas can be measured by ConfoVIZ®. Because of the high data density, roughness measurements, for example, can be made by the patented confocal method. Micro-geometries are measured by the proven principle of focus variation, which can obtain larger acceptance angles by ring light illumination.

Roughness measurements: profile and area based

Application in industry requires traceable and comparable measuring data obtained on the basis of appropriate standards. The surfaces measured by the ConfoVIZ® software are analyzed traceably and therefore comparably with the analysis software MountainsMap® according to DIN EN ISO 4287/4288 and DIN EN ISO 13565. Profile based parameters can be compared 1:1 with values measured by stylus profilometers. Our ”gold standard“ is the proof of measuring capability using roughness standards of independent suppliers with practical structures ground and turned on steel and nickel. The function-oriented area parameters according to DIN EN ISO 25178 are also available in MountainsMap.

Shape and contour measurements

The Confovis measurement systems not only measure micro geometries in the research and development sector to secure product developments or optimisation. They also support quality assurance in manufacturing. Alongside the capturing of parameters, such as heights, widths, clearances, angles and radii, motive and particle analyses, as well as volume calculations can be carried out.

Functional volume and texture direction

For the comprehensive evaluation of an area, function oriented area parameters according to DIN EN ISO 25178 are evaluated in addition to profile based roughness data according to DIN EN ISO 4287 /88 and DIN EN ISO 13565. In addition to the Firestone-Abbott curve, frequency analysis, which provides information about the texture direction, is available on the press of a button.

Tribology and material ratio

Tribological functional planes resulting from honing or finishing require an assessment that reaches far beyond capturing the arithmetical average roughness value Ra. In order to make assertions on the surface quality after appropriate processing, at least additional parameters, such as reduced peak height Rpk and reduced groove depth Rvk must be captured.With the Confovis contactless measurement technology micro structures are captured holistically and assessed not only on a profile-base, but also on plane-base.

Cutting edge analysis

For achieving the optimal cutting edge several factors, such as material, processing technology, etc. are to be considered. In order to assess the cutting edge quality / edge rounding, particularly the cutting edge radius and the K-factor will be considered during the cutting edge analysis. With the Confovis measurement systems these parameters can be captured quickly and reliably. Thanks to the three dimensional measurement, defects and faults can be exactly illustrated down to the nanometre range.

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