Abstract:
In this work, a numerical analysis, based on the finite element method, of the process of roller spinning of the spiral groove on the tube and the influence of its screw pitch on the stress-strain state of the tube in the zone of plastic deformation was carried out. The obtained graphical dependences of the influence of the screw pitch of the mandrel spiral groove on the maximum values equivalent strain εi show that with a tenfold increase in the screw pitch of the spiral groove of the mandrel the maximum equivalent strain increases by 1.5 times. The increase in the equivalent strain is caused by a decrease in the width of the groove at large steps of its screw in a section that is perpendicular to the direction of the screw line, which reduces the size of the roller rounding radius that affects the dimensions of the local zone of plastic deformation of the tube.
The obtained results can be applied during the development of technology for the production of heat exchange surfaces for heat exchange devices with high efficiency coefficients (up to 40%).
