Current level of research of the process of extrusion of pipes with additional rotation of press needles

The article explains the problem of studying the process of extrusion of pipes with additional rotational motion of the press needle. Basic results of previous studies in this area of improvement of tube pressing systems are described. Technological bases of the pipe pressing process with helical fins on inner surface are presented. The purpose of the development of systems for the extrusion of pipes with rotation of press needle is explained. Principal relations for calculating the geometrical parameters of profiling of press needles with helical thread allowing to produce finned tubes with helical inner surface are presented. Design of the plant, its operation principle and specifications are described. The prospects of application of the plant for studying the pressing process of smooth pipes and pipes with internal helical fins obtained by rotating the press needle are determined.