An Impact of Technological Conditions on Surface Burning in Grinding of the Orbit

Abstract

A process of quality development helps us reveal concrete deficiences, an analysis of their origin and realization of required modifications that are needed to solve a concrete problem. One of the aims of quality development of production in bearing industries is to find out an impact of tchnological conditions to form burning of surfaces in grinding of orbits of bearing rings. We try to describe an origin of the problem, to find reasons of burned surfaces in a process of grinding and to propose such technological conditions to avoid above-stated problems and to produce the least possible number of non-identical workpieces. To lower a number of burnings in grinding of the orbit to zero percentage is not real, however, we have to try to get a minimal number of parts with damaged surface.

Application of Fourier Series for Evaluation of Roundness Profiles in Metrology

“…Therefore, it is necessary to know the mathematical basics of harmonic analysis and apply it to the measured profiles. The har- monic analysis can be applied in the area of surface macrogeometry (geometric tolerances) but also in the area of surface microgeometry (surface roughness [10,19]). The article focused on applying the harmonic analysis to a roughness profile that belongs to the area of geometric tolerances.…”

“…a n cos(nγ) + b n sin(nγ)) (18) Instead of original coefficients γ n determining the n-th harmonic, we obtain the new coefficients a n and b n . a n = c n cosγ n (19) b n = c n sinγ n (20) The following applies for amplitude: (21) And for phase: (22) Table 1 presents the difference between the calculated (γ c ) and the actual (γ) phases -the actual phase depends on whether the values "a" and "b" are positive (+) or negative (-). The table is supplemented by examples and graphical interpretation.…”