Finite Element Analysis Of Non-Quenched And Temperde Steel Hollow Workpieces By Three-Rolls Wedge Rolling Process Of Forming

Hollow shaft wedge rolling process is in a rising as a new stage of technology, its applications are constantly expanding. To save energy, lower manufacturing costs, this issue does not require the use of the quenching and tempering heat treatment of micro-alloying non-quenched and tempered steel 40MnV. In recent years, stepped hollow shaft parts of the wedge rolling forming is attracting attention, and certain applications. Compared with the solid pieces, wedge rolling hollow pieces, one of the biggest feature is the rolling mill before and after the rolled piece was part of the wall thickness change. Wall thickness of hollow parts is an important design parameters. Therefore understand and grasp the rolled piece of wall thickness variation, control secundum, understanding of cross wedge rolling parts forming the law, for the advanced technology of cross wedge rolling ladder for the hollow shaft parts is very important.Using DEFORM-3D finite element software to simulate the three-roll cross wedge rolling of the rolling process, an analysis of different conditions, and pass on the impact of wall thickness. Analysis of the rolled piece at different times of stress, strain and speed of change. Hollow shaft parts as a result of rolling in the hollow, the inner hole surface being a free surface, the uneven wall thickness forming process, as well as the rotation is not easy, rolling instability and so on, to move a three-roll cross wedge rolling with the core diameter, etc. rod rolling. Through the mandrel with the hollow pieces of rolling diameter was unchanged and the rules of the surface smooth. Analysis of rolling mill with mandrel pieces at different times of stress, strain and speed of change.In this paper, the use of neural networks under different conditions on the diameter of the rolled piece of the key points for training, any conditions to be rolled piece diameter trends. Finally, in the VB programming environment, the development of hollow pieces of rolling forecast after rolling diameter specialized software. The software is integrated with MATLAB in a network to achieve the BP neural network. To predict the conditions of different rolling diameter changes after rolling, but also to map out the changes in diameter curve, which is three-roll cross wedge rolling hollow pieces of research is very important to enable it to better applied to the actual production, there are very important to guide the production of practical significance.In this paper, three-roll cross wedge DS200 mill hollow pieces of the pass, rolling wall thickness before and after rolling were studied. Rolling force test; observed rolling in the rolling process of shape change; obtained samples after rolling pass, wall thickness, such as measured values. Built with the finite element model results were compared, the basic agreement between the two.