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Classical processes of manufacturing polycrystalline electro-corundum abradants, using the method of charge melting, have gradually been loosing their industrial significance because of two high energy consumtion, inability to manufacture abrasive grains with the pre-defined stereometry patterns, as well as the inability of the abrasive grains thus manufactured to undergo self-sharpening during grinding...
In the paper, a neural model allowing us to forecast chosen surface layer features of the ground workpiece is described. The model was used for analysing the influence of wheel characteristics and dressing conditions on surface roughness of workpiece and residual stresses. The relationships published in literature were also taken into account. An example of the model application was shown as well.
The paper proposes an approach employing fractal geometry to describe growing martensite phase in an austenitic steel. Inside macroscopic volume (specimen), the distribution of martensite is depicted by measure, and the scaling properties of this measure describe the important, long scale changes of materi-als characteristics. In fact, distribution of martensite relates to two measures. The first...
The paper deals with the stress distribution and stress value in grinding wheels with ceramic binding obtained using the method of optically sensitive surface layer. The tests were conducted with the grinding wheels being loaded both statically and with inertial forces existing during rotation of the grinding wheel. The results obtained were compared to those concerning the dynamic strength of grinding...
Grinding, polishing, honing, lapping and superfinishing are the most common methods of producing fine surface finishes. Fine surface finish and high dimensional accuracy can be obtained in lapping with the use of relatively simple means of pro-ductions. This technology can be used for metallic parts, as well as for non-metallic machine elements, mainly for engineering ceramics which have found use...
The paper presents the topographic model and geometrical parameters of the active surface of grind-ing wheels made of the mixture of two types of abrasive grains and a microsphere. A special filler, called a microsphere by the authors, is a novelty in the structure of such abrasive tools. The aim of this paper was to obtain the basic parameters of microgeometry of such grinding wheels by means of...
In the paper, results of research concerning new measuring equipment for evaluation of cutting properties of superhard grinding wheels under production conditions are described. The results presented are focused on the selection of conditions for measurement and repeatability of the measurement. The sensitivity of the parameters being measured to variation of dressing conditions of CBN grinding wheels...
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