Form Metrology

AbstractThe paper relates to the problem of adaptation of V-block methods to waviness measurements of cylindricalsurfaces. It presents the fundamentals of V-block methods and the principle of their application. The V-blockmethods can be successfully used to measure the roundness and waviness deviations of large cylinders used inpaper industry, shipping industry, or in metallurgy. The concept…

Abstract The article deals with the research of the measuring probe signal of roundness machine Roundscan of JenoptikIM producer. The probe of this machine scans geometric form as well as surface structure. The probe signal dependenceon the probe arm elevation is not perfect linear and this influences the precision of evaluated form characteristics,roughness parameters as…

AbstractAn intercomparison of high-accuracy roundness measurements has been carried out with the participation of thenational standards laboratories of ten European countries. The circulated artefacts were a hemispherical glass standardand a steel disc. A total of eight roundness profiles were examined, two on the hemisphere and six on the disc. Theeccentricity between external and internal surfaces…

Abstract This paper presents a new error separation method for accurate roundness measurement called the orthogonal mixed method. This method uses the information of one displacement probe and one angle probe to separate roundness error from spindle error. This method was developed from the mixed method, which uses the information of two displacement probes and…

Abstract This paper presents a new multiprobe method for roundness measurements called the mixed method. In this method, displacements at two points on a cylindrical workpiece and an angle at one of the two points are simultaneously monitored by two probes. The differential output of the probes cancels the effect of the spindle error, and…

The main types of roundness measuring gauges used in industrial countries are considered. A mountableroundness measuring gauge made by a precision machine-tool plant in St. Petersburg is compared with thosetypes.

Dimensional inspection of a manufactured surface by means of a coordinate measuring machine (CMM) produces a set ofCartesian coordinates. The coordinates are processed to yield the geometric tolerance of the surface. This paper presents a newapproach to the evaluation of flatness, cylindricity and sphericity tolerance based on surface invariance with regard to the rigidmotions. The…