Idle and axial roll speed law trend effect in an industrial ring rolling process

摘要

In Ring Rolling process, to generate a seamless and axis symmetrical ring, two independent deformation processes\udsimultaneously occur to reduce the starting ring cross section shape (width and height) in order to increase the diameter. How this\udshape changes during the whole deformation process greatly affects the produced ring quality and the loads and energy needed. The\udmain problem is that the shape change is due to two deformation processes that occur in two different ring sections. The ring width\udreduction is realized in the cross section between the Idle and the Driver roll while the cross section deformed by the Axial rolls\udmovement regulates the ring height. The main problem is that each roll speed law could be set independently from the others. In the\udindustrial environment, a milling curve is introduced to correlate them to the ring section shape.\udIn order to enhance the knowledge on how the Idle and Axial roll speed laws affect the Ring Rolling process, in this work an\udindustrial case study was modeled by a numerical approach. Different Idle and Axial roll speed laws (linearly decreasing, constant,\udlinearly increasing), were designed and simulated. The results were analyzed in order to understand how each speed law trend affects\udthe produced ring quality (higher diameter, lower fishtail) and the process performance (lower loads and energy required for\udmanufacturing).