To the question of polymeric furrow-forming disk coulters functional reliability
During operation, the machines are subjected to various operational influences, as a result of which their technical condition changes, which worsens their technical and economic indicators, operating speeds decrease, traction resistance increases, and productivity decreases. The main reasons for the decrease in the initial characteristics are a change in geometry as a result of wear. External factors affecting reliability include: climatic conditions, soil properties, level of maintenance and repair. Internal factors causing a change in the initial characteristics include imperfection of the structure (physicomechanical properties of the materials used for the manufacture of parts), technology for their manufacture and repair. Product reliability is a generalized property that includes the concepts of reliability and durability. Soil properties have a significant impact on longevity, especially when working in conditions of increased clogging with stones and crop residues. When working in difficult soil and climatic conditions, the load on the working bodies of agricultural machines increases by 1.5 to 3 times, the number of failures increases. The article presents the results of a study devoted to improving the reliability and reliability of the furrow-forming working bodies of sowing machines for conditions of high humidity and contamination with crop residues. The time required to restore health is 0.45 hours. for an experimental furrow-forming working body and 0.87 hours. for serial furrow-forming working body. The availability factor (stationary) was 0.995 for the experimental and 0.990 for the serial furrow-forming device, based on which we can conclude that the furrow-forming working body is more suitable for repair. The readiness coefficient (non-stationary) shows a higher degree of readiness for the work of the experimental furrow-forming working body in comparison with the serial opener.