Анализ повышения точности внутреннего диаметра труб при раздаче

Abstract

At present, one of the highly demanded types of metal products is steel pipes for constructional purposes. The most important characteristics are their dimensional accuracy and surface finish, high level of mechanical properties and operating characteristics. Particular attention is paid to the precision of the internal channel of pipes, because this parameter determines the reliability and cost-effectiveness of their use. One of the most effective ways to increase the precision of the internal channel is pipe expansion by a mandrel. To investigate the accuracy of pipes a program of finite element simulation should be used. This has allowed us to investigate the extrafocal expansion at the inlet and outlet of the deformation zone, the inhomogeneity of deformation and the increasing pipe accuracy. The evaluation of these characteristics is an important factor for developing optimal conditions of deformation and tool design high-precision pipes in order to produce in terms of their inner diameter.