This article focuses on the key results of hydroabrasive flat stock cutting research. The forming process is described and its theoretical investigation is presented. The theoretical dependence for the roughness determination of the surface cut is set. Experimental results of the process investigation confirming their theoretical adequacy are put forward. The next steps of process optimization within the framework of modern production are allocated.
The article presents the results of studies of the process of abrasive processing of parts made of polymer composite materials. Special features of processing of polymer composites, technology of production of preform by hydroabosive cutting are described. Studies have been carried out and stages of preparation of a part made of polymer composite material for “gluing” operation have been described. Dependencies for determination of surface roughness during hydroabrasive cutting of polymer composite material are given. Studies have been carried out to achieve the necessary surface roughness when gluing blanks. A curvature is given describing the surface roughness, which is necessary to achieve a reliable adhesive connection. Results of theoretical and experimental studies of hydroabrasive cutting process are presented. Technique of the execution, applied tools and equipment are described. The results of theoretical and experimental studies were compared. Their high convergence has been established. The results of experimental studies on preparation of parts from polymer composite materials for gluing are presented. Abrasive tool, processing modes are selected. Design method for abrasive processing of parts made of polymer composite materials is proposed.
The article describes a way to increase the efficiency of an abrasive tool by its impregnation in an aqueous solution of chromium diiodide. The device scheme for impregnating the instrument is proposed. Research results of durability of tools impregnated with chromium diiodide and structural condition of material of a surface layer of details after processing are resulted. Within of the researches presented in the article the grinding processing a shafts made from various iron-carbon steels with prepared abrasive tools was conducted. As a result of the machining the scattering fields of the batch sizes of the parts within the grinding wheel resistance were determined. This data for processing with standard grinding wheels and impregnated by chromium diiodide were done. Using data from controlled grinding of workpieces, approximate values of the KΔ coefficient were determined depending on the diameter of the workpiece surface, the required size accuracy of part and the method application of the surfactants. It is shown that regardless of the material being processed, the use of a grinding wheel impregnated with chromium diiodide leads to a reduction in the specific value of the accumulated deformation energy Espec. Taking into account these results it is possible to predict up to twofold reduction of the cost of machining with the abrasive tool of grinding parts, which will reduce the cost of their manufacture by 20-25%. The developed process of impregnating grinding wheels with chromium diiodide can be used without large economic costs in many machine-building company also during repair works.
The technology of obtaining an abrasive tool on a ceramic bond for surfacing components made of chrome-nickel steels and alloys including the composition of the abrasive mass with wood flour, and the process of tool impregnation with an aqueous solution of chrome diiodide are considered. The comparison results on the efficiency of grindstones made according to the developed technology with their redress life between two consecutive shapings, and the performance quality indices of the processed component surfaces are presented. An empirical dependence of the efficient grindstone life between two consecutive shapings on the component speed, length feed, infeed movement, and the chrome diiodide saturation in the impregnated grindstone, is obtained. It can be used by production managers to optimize the modes of surfacing components from chrome-nickel steels and alloys providing the required performance quality indices. The mechanism of loss of function of the grindstone impregnated with chrome diiodide is considered.
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