System Approach and Multivariance of Screw Surface Profiling

The article demonstrates the urgency of the problem of screw surface profiling and the drawbacks of the existing profiling methods. It justifies the applicability of the system approach to the problem of screw surface profiling. The main types of structural elements, types, and the purpose of their parameters are identified on the basis of the system approach. This allowed one to identify the reasons for the emerging multivariance of solving the profiling problems, which is determined both by the interrelationship of structural elements and the variability by their initial parameters, and by the need to ensure conditions for a correct shaping of screw surfaces. The article identifies the possible types of screw surface profiling problems which are called tool, control, adjustment, and combined. It shows the role of each problem in practical use. The classification of profiling problems allows one to predict the development of profiling methods and reflects the development of the theory of screw surface shaping.