About the article
K.V. FOMIN, Dr. Sc.
In the process of operation, the cutters of working bodies of peat milling agents are subjected to significant loads, which leads to their deformation or destruction. It leads to increased power consumption, violation of technological requirements to the obtained products, reduction of productivity and reliability of the unit. Therefore, the evaluation of the strength of the cutting elements when performing a technological operation at the stage of designing is an actual task. The article presents a methodology of computer simulation of the stress-strain state of the cutting elements of peat milling units in order to assess their static strength at the design stage. The means of computer-aided design system KOMPAS-3D and the specialized design module APM FEM are used. A calculation example of the analysis of loading of knives of the machine for extracting molded lumpy peat MTK-16 is presented. The analysis of stress and strain state of cutting elements during interaction with wood inclusions is carried out. The influence of blunting of cutting edge of cutters on factors of safety margin of ultimate strength and fluidity is considered. The presented material can be useful in designing new and modernization of existing peat milling units in order to increase their reliability.
peat milling unit, cutter, cutting element, finite element method, stress-strain state, strength