Bridun I. Justification criteria and structure of means of technical diagnostics of road-header's cutting head

The object of the research is the process of face destruction made by the cutter operating member of the shaft-sinking set. The research goal is to raise the efficiency of application of the selective action shaft-sinking sets through the valid choice of the strategy of replacement of the cutting tool based on the proposed means and methods of diagnostics of the state of the operating member with taking into account the stated regularities of the influence of failing of the cutters on the shaft-sinking set operating process characteristics. The investigation methods are as follows: experimental determination of the regularities of the operation process of the coal-face destruction in representative production and bench conditions; processing of the results of the natural and computing experiments has been made by the probability theory, mathematical statistics and random process theory methods ;to develop the mathematical models of the analysis of the operation processes of the mechatronic excavating machines the methods of theoretical mechanics, analytical geometry and rock cutting theory were applied.The research results are as follows: the ratio of the amplitudes of the current frequency content of the operating member drive engine which correspond to the frequency of the boring bit rotation and its double value can be taken as the diagnosed parameter of the shaft-sinking set cutter failing; the diagnosed parameter of the cutter wear is to be not the absolute value of some cutter wear but the integral index that takes into account their contribution into forming of loading of the shaft-sinking set operating member as a whole - energy cost per unit for the face processing cycle that is calculated according to the data of continuous registration of the cutting drive engine current; the model of optimization of technical maintenance of the cutter operating member of the shaft-sinking set adapted to the operation conditions through the application of the experimentally determined linear regression dependences of the energy cost per unit on the broken rock total amount. The results of the used in the creation and modernization of feed system of cutting head of road header for high rates of penetration. Application area: mining engineering.