EVALUATION OF NOMENCLATURE OF MACHINE PARTS, THAT DETERMINE RESOURCE

Abstract

The development of machine designs occurs with a constant desire to increase their productivity, which is almost always accompanied by an increase in the mechanical and thermal tension of the movable joints of parts. At the same time, the tasks of achieving high reliability and durability of the machine, reducing its weight, reducing the consumption of scarce materials are set. Based on a comprehensive assessment of automotive parts that determine the resource, it was found that abrasive wear prevails over all other types of wear. About 83% of automotive parts have wear up to 0.6 mm. When interacting with the soil, the working bodies of tillage and planting machines are subjected to intense abrasive wear. In addition, the working bodies of agricultural machines are operated in a chemically abrasive environment, which is associated with the addition of various fertilizers to the soil and the presence of moisture in it. Together, these factors have such a strong influence on the working bodies of agricultural machines, which makes them unusable after almost several hours of intensive work. Currently, in Ukraine, the following working bodies of tillage machines are used for tillage in agriculture: ploughshares, pointed and one-sided cultivator paws, various coulter designs, harrow discs, husker discs, baking powder, etc. In the soil environment, the working bodies are subject to intense abrasive wear. Typical representatives of the working bodies of tillage machines with cutting elements are the paws of cultivators designed for loosening, destroying weeds and mixing soil particles. The analysis of methods and methods of restoration of machine parts used at the enterprises of the agro-industrial complex showed that more than 60% of the parts are restored by surfacing and gas thermal spraying. Keywords: resource, repair, restoration, surfacing, thermal spraying, wear, durability