China
Africa
Explore chapters and articles related to this topic
Metrology
Published in Richard Leach, Stuart T. Smith, Basics of Precision Engineering, 2017
To communicate the geometric dimensioning and tolerancing requirements, the ISO 129-1:2004(en) and the ASME Y14.5 standards offer basic guidelines, whereas there are others for diverse but specific applications such as for optical systems (ISO 10110) and shipbuilding (ISO 129-4). There are also standards for calculating specific parameters, such as those related to surface texture in ISO 25178-2 and ASME B46.1 (see Chapter 5).
Surface Mechanical (Physical) Treatments Prior to Bonding
Published in A. Pizzi, K. L. Mittal, Handbook of Adhesive Technology, 2017
Janette Brezinová, Anna Guzanová, Dagmar Draganovská
ISO 25178 is an international standard for the spatial texture of a 3-D surface. Measuring and processing of noticeably larger amounts of data that describe the spatial surface profile provide a huge amount of information, required for real reconstruction of the evaluated surface.
Post-Process Surface Metrology
Published in Richard Leach, Simone Carmignato, Precision Metal Additive Manufacturing, 2020
Nicola Senin, Francois Blateyron
ISO 25178 – Areal surface texture: standard in multiple parts that defines terminology, measurement methods and parameters for use in areal topography measurement and characterisation (Table 11.1).
Application of 3D imaging and analysis techniques for the study of food plant cellular deformations during drying
Published in Drying Technology, 2018
C. M. Rathnayaka, H. C. P. Karunasena, W. Senadeera, Y. T. Gu
In determining the quantitative details about a particular surface, this analytical tool uses the ISO 25178 standard relating to the analysis of 3D areal surface texture. In Fig. 6, a data set produced for a fresh apple sample is shown, where Fig. 6a presents the 2D view corresponding to the 3D contour map indicated in Fig. 5. Figure 6b displays quantified surface information corresponding to the sample. To study the variation of the 3D characteristics of the plant cellular structure during drying, the Expert 3D data obtained for the same apple sample at various states of dryness were analyzed. The results are presented in Table 1 along with the corresponding statistical analysis. Sa, Sz, and Sq were chosen as the key parameters that could be used to demonstrate the 3D behavior (Fig. 7).
Vision-based surface roughness evaluation system for end milling
Published in International Journal of Computer Integrated Manufacturing, 2018
Besmir Cuka, Minho Cho, Dong-Won Kim
Thus, to improve the resolution and accuracy of the vision data, a simple technique is proposed which normalises the pixel intensity values and then scales them according to the theoretical maximum peak of the inspected surface. The only requirement is the knowledge of the geometry of the cutting tool. Then it is possible to digitally reconstruct the inspected surface from a single image. This enables the fast evaluation of amplitude, spacing and hybrid surface texture parameters as defined in ISO-25178.
Surface quality of printed porous materials for permeability rig calibration
Published in Materials and Manufacturing Processes, 2022
M. Bodaghi, M. Mobin, D. Ban, S. V. Lomov, M. Nikzad
The surface quality (degree of roughness) of 3D printed parts was examined by Bruker Contour GT-K 3D optical profilometer. The roughness of surfaces was measured at three separate locations on the top surface of the 3D printed parts. Then, the 3D areal surface texture parameters were then evaluated according to ISO 25178.