Zoubkov

This article is based on the review of Russian and foreign periodicals about edge tools published in the last seven years. Existent up-to-date cutting tool materials for edge tools are presented in this work. Their physical and mechanical properties and rational application areas were also described. Special attention was paid to new types of oxide, mixed, whisker-reinforced and silicon nitride cutting ceramics and extra-hard cutting tool materials based on the poly crystalline diamond and cubic boron nitride. Comparison of Russian and foreign trade marks producing cutting tool materials was presented. Classification of extra-hard diamond-based cutting tool materials was also given. Analysis of development prospects of cutting tool materials was carried out.

The article presents the main principles of through-wall slot width controlling for polymer filtering tubes produced by deformational cutting technology. Dependence of the machining parameters on slot width at the beginning and the end of slotting was determined. Authors proposed the  technique providing the slot width uniformity along the filter tube. This technique is based on changing the axial feed value when machining the beginning and the end of slotting. Experimental researches proved this method. Slot width variance along the slot for adjustable filter tubes with helical through-wall slot rows was described and proved experimentally. The main factor influencing on slot width variance is inclination  angle of helical slot rows.

The article presents data on deviations from the theoretical shapes and sizes of polygonal holes in the fasteners, obtained by rotary broaching. For this process estimated three types of shape deviations: hole taper, alteration of hole size, compared with tool size and helical hole configuration. Spiral-shaped sides of the hole bring main input in hole inaccuracy. The influence of technological factors and processing parameters, allowing to obtain hexagonal holes with the specified requirements for dimensional accuracy was determined.