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For determining the neutral line on the contact zone to determine the relative slip condition between the contact surface of rolling pieces and the roll, the contact boundary curve was proposed by obtaining the radius of flow line and the bite angle of points on the contact boundary based on the flow line method, and then the contact surface was discretized as flow line elements to build a novel analytic...
In alloy bar rolling by Round-Oval pass sequence, the critical point on the contact boundary is solved and the cross-section profile parameter of outgoing workpiece is represented, then the equivalent height of outgoing workpiece and mean roll radius at the exit section is derived to correct the spread formula. Based on the initial spread calculated by the modified Shinokura and Takai spread formula,...
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