Determination of the range of variation of the parameters of the stress-strain state of the metal during continuous pipe rolling

The processes of longitudinal hot rolling of seamless pipes on a mandrel and without a mandrel are widely used in modern tube rolling machines. When analyzing the production technology of pipes, it is necessary to take into account many factors, therefore, to determine the effect of each of them on the quality of finished pipes, it is advisable to use computer simulation. To date, there are quite a few programs that allow you to simulate the processes of hot rolling by the finite element method. One of the prerequisites for obtaining reliable results in the simulation is the correct calculation of the resistance of the metal to plastic deformation. In this work, with the help of computer simulation, ranges were determined in which the main parameters that determine the value of resistance to plastic deformation change. In the QForm program, pipe rolling on a floating mandrel in the first four stands of a continuous two-roll mill was modeled. Maximum values were obtained for such quantities as the speed and magnitude of the deformation in the cages, as well as the range of the metal temperature.