The article considers a number of models for describing threshing technology, which is associated with a variety of physical and mechanical properties of plants under different threshing conditions. The analysis of determining the position of a site with a relatively high resistance to the movement of plant mass is carried out, which may allow taking constructive measures to increase the speed of stems and reduce their damage for threshing machines of different sizes. The main components of the threshing medium in the threshing space are stems and grains. When studying the regularities of the threshing and separation processes, various models of the components of the threshed mass are used, reflecting to varying degrees the essential aspects of the phenomena under study. The given models of the threshed mass expand our understanding of the picture of what is happening in the threshing space.
This publication is devoted to the formation of equilibrium conditions in ordered dislocation structures obtained by the influence of highly concentrated electric energy flows and an informal (longitudinaltorsional) ultrasonic field on the conductive substrate material.
In this article we studied the work of cutting beater in the transition zone of a combine harvester threshing drum. The influence of the parameters of the beater on the reflection of grains in its interaction with the heap flow and feed to the first stage of the straw-cutter is considered. A constructive scheme of the location of the working bodies of the transition zone showed a decrease in losses for straw.
The influence of coatings based on titanium carbide and zirconium carbide, obtained by PVD method, on cutting tool wear resistance under conditions of the longitudinal turning of transport machines’ parts of steel 45 and stainless steel 12H18N10T by inserts of hard alloy grade T15K6 was investigated. It has been experimentally established that the presence and composition of the coating on the working surfaces of the tool in most cases contributes to a significant reduction in the intensity of wear of cemented carbide inserts. When turning stainless steel 12H18N10T, the best result was demonstrated by the coating ZrN + (Ti–Zr) N + TiN, which provided not only the minimum intensity of wear, but also the expansion of the range of optimal cutting speeds. When machining structural steel 45, the maximum reduction in the wear intensity of the cutting inserts was observed with the use of a single-layer TiN coating and a (Ti,Zr)N coating.
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