ANALYTİCAL MODEL OF OBJECT’S MOVEMENT AT TECHNOLOGICAL PROCESS OF CONTOUR MİLLİNG METALS

Abstract

Introduction. The article deals with the actual problem that arises in the machining of metals, that is, the creation of an analytical accompanying description of technological processes of cutting. The influence of basic directions of metalworking physics on the precision of manufacturing precision parts of devices is considered. After analyzing the whole list of problems related to the analytical description of the metal machining process, it is necessary to determine a number of theoretical foundations of metalworking. Thus, it is proved that taking into account the real coordinates of the trajectories of the objects of the technological process of metal machining gives the possibility of improving the accuracy of machining of the workpiece. Main part. We solve the problem of motion of a solid body (tool) in a solid body (parts), that is, we have a typically negative technology. The process of negative technology is the destruction of excess material down to the surface of the workpiece. For milling processing, a number of conceptual trajectories are introduced, which are considered normalized. Since all tools and parts or workpieces have their own pandanic zone, the phenomenon of equidistance is always taken into account in the trajectories of object movement. Analyzing all types of metalworking, one can draw a fairly strong conclusion, namely that the excess material is destroyed in three main ways. The elementary methods of a substance destruction and the corresponding movements of the instrument are determined, that is: linear destruction; annular destruction; disk-shaped destruction. The negative technological process is carried out on condition that the hardness of the tool and its dynamic properties exceed the similar parameters of the workpiece material. In this case, the pandal volume of the destroyed material is much greater than the volume of the destroyed part of the workpiece material. This is due to the significant increase in the roughness of the individual particles of the destroyed material. For analytical research, we accept a number of conditions that reject secondary attributes. The simulation of the reciprocal movement of the cutting tool and the details of contour milling are performed. The formalized models of contour milling machining created describe the phantom movement of the tool and the workpiece during the manufacture of the workpiece. Conclusions. Idealized formalized motion models of technological objects during contour milling are considered. These models provide an opportunity to investigate the underlying causes of error generation as they represent idealized trajectories with respect to actual technological operations. Despite these studies of tool contouring, there are phenomena that accompany metalworking as concomitant and also need attention. This is pandanic area of cutting tool. Further necessary research is the creation of models of motion of this pandan zone in the space of the workpiece, which gives the opportunity to improve the trajectory of the contour movement of the cutting tool, and thus increase the precision of manufacturing precision parts.