International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The article presents a technology of carbon plastics producing based on polyamide-6 with the incorporation of PMS-400 grade lubricant into the material structure. A brief review of the results of carbon plastic applications in engineering is provided. The research methodology and initial parameters are outlined. The experiments were carried out using a single-screw extruder EKG-45, modernized to produce the carbon plastics. As the object of the study, a laboratory-produced carbon plastic СPA-6-20 was used. This material is a carbon plastic based on polyamide-6 reinforced with 20 wt.% carbon fiber. Experimental results established that the optimal screw rotation speed of the EKG-45 extruder is 90 min⁻ ¹. Under this processing mode, the compressive yield stress increased by 4%, while the impact toughness rose by 4.5%. At this stage of the research, mechanical strength properties were considered, as the most critical for applications in heavily loaded components of moving joints. The investigations carried out at the Dnipro State Agrarian and Economic University.

The article presents the results of the action of agricultural machinery on soil compaction – chernozems. The dependence of changes in soil compaction on crop cultivation technologies is shown. A comparison is made for such technologies as No-Tillage and traditional. The technique used in these technologies is analyzed. Conclusions were made and recommendations were given to reduce the negative impact of technology on the soil.

The paper presents the method of combining the results of soil compaction, which were obtained by the penetrometer of Ukrainian production S 600, into the software of digital agriculture. For example, it is shown how to enter the obtained soil compaction data into the AFS software.

The expediency of using parts made of polymer composites in moving joints of machines in the oil and fat industry is shown. The use of experimental moving joints provided an increase in the resource from 500 hours to 1080 hours minimum. Diagnostics of experimental moving joints revealed that some of them have signs of transfer of the composite material to the steel shaft. This is explained by the following factors: the presence of the transfer effect and operation at high temperatures of 140 °C. The operating modes of the equipment are maintained. Most of the experimental parts made of polymer-composite material are in a running-in state, as wear has not been recorded in them.