Authors: Xiaohui Shen Jun Yan Tao An Zhangze Xu Jing Zhang
Publish Date: 2014/02/11
Volume: 72, Issue: 1-4, Pages: 179-191
Abstract
Rolling is one of the key stages of railway wheel hot forming process In this work a threedimensional finite element analysis on wheel vertical rolling process based on some strategies proposed has been carried out by using FE code SuperForm In modeling a virtual mandrel is exploited in the hub hole to keep the wheel central instead of the guide rolls and centering rolls Some features of the wheel forming are deeply investigated such as the rim diameter expanding the rim lateral spreading the metal flow in the circumferential direction and the stresses distribution The results show that 1 the rim radius expanding mainly occurs in the two affected zones before and after the back roll deformation zone 2 the rim metal has flow trend in the circumferential direction during rolling the metal of the intersection area between the tread and the rim external side surface has the largest relative angular displacement and 3 the tensile stresses of the web both in radial and circumferential directions during rolling result in the web thickness decreasing by about 3 mm for the investigated wheel The simulations results reveal the forming mechanisms of wheel rolling laying the basis for designing and optimizing railway wheel forming process
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