SOLVING FUNCTIONAL-TECHNOLOGICAL PROBLEMS USING A NON-PARAMETRIC APPROACH FOR CONTROL OF MICROGEOMETRY OF THE SURFACES OF DETAILS

In the article considers the effect of surface roughness on the functioning of a specific mechanism. In case of proven dependence of the studied functional property of surface microgeometry, a process of optimization of the sought parameter is carried out, in which the methods of mathematical analysis and theoretic foundations of technology of appliance and mechanical engineering are used for the basis of the theoretical studies. As control parameters of the specified optimal microgeometry, deciding the given task, the so-called non-parametric criteria are used, namely graphical of certain surface-profile functions

INCREASING THE QUALITY OF FORMING OF SPINNING DETAILS OF ALUMINUM ALLOYS BY CONTROLLING THE RESIDUAL STRESSES IN THEIR SURFACE LAYER

In the article are analyzed the effect of technological modes and processing parameters on the stress of spinning (cold flow turning) details of aluminum alloys. Аs the object of the study was used a detail of aluminum alloy AMg5, obtained after 3-stage spinning with intermediate heat treatments between the stages. As a control criterion was used non-destructive resistive electro contact method, based on the correlation between the integral electric and mechanical characteristics of metals and alloys – specific conductivity or electrical resistivity within the h-layer of the metal and the amount of deformation in the crystal lattice of the material due to the residual stresses