Abstract
In modern repair production, materials are used that change the structure of the surface layer during their machining. This leads to a significant decrease in the adhesion of the coating to the substrate and the spread of residual stresses of the sub-strate into the coating. As a result, the coating cracks much often, which imposes sig-nificant restrictions on the use of galvanic deposition technology in the restoration of parts. (Research purpose) The research purpose is to select a variant of numerical cal-culation of the parameters of the spindle assembly of the tool head for the application of dispersed-hardened galvanic composite coatings based on chromium, which allows obtaining coatings with a given roughness. (Materials and methods) Based on the re-sults of calculations, there were manufactured a special installation for applying dis-persed-hardened galvanic composite coatings. It is possible to change the deposition parameters of the composite coating in wide ranges at the installation. (Results and discussion) The article proposes the calculation algorithm using numerical methods, parameters of oscillation of the rotating spindle of the tool head for various design variants of spindle assemblies, implemented using an electronic computer. The calcu-lation of the spindle node is significantly facilitated when using the method of initial parameters in matrix form. The method allows you to link the parameters of the spin-dle node in the initial section (at the front end of the spindle) with similar parameters in any other section. (Conclusions) The experiment showed that the calculations were correct: the proposed method of applying dispersed-hardened coatings allows pro-cessing parts of 7-8 accuracy quality with dimensional dispersed-hardened galvanic composite coatings without mechanical treatment with a coating surface roughness based on a chrome matrix equal to 0.02-0.04 micrometers with coating thicknesses from 20 to 300 micrometers.
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