Transactions of Materials and Heat Treatment

Title：Effect of forming angle on central defect of twice cross wedge rolling

Authors： CAI Ya-ning ZHANG Kang-sheng LOU Yi-zhi HU Zheng-huan (School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China)

Unit：

KeyWords： cross wedge rolling heavy section shrinkage twice wedge forming angle central defect

ClassificationCode：TG335

year,vol(issue):pagenumber：2008,33(3):68-71

Abstract：

In order to study the effect rules of the technological parameters on the central defect of the heavy section shrinkage twice cross wedge rolling axis accessories,the experiment of twice cross wedge rolling was carried out.A series of area data of the centre holes inside the mill bars under different technological parameters was gained.The effect rules of the forming angle on the areas of the centre holes was found out using MATLAB to analyze the data: when one of the two wedge forming angles α1 and α2 is small,the hole area reduces obviously along with the increasing of the other wedge forming angle.The extent of α2 is a little bit larger than that of α1.This result can be a reference for designing the moulds and rolling mills.

Funds：

国家自然科学基金资助项目(50575023,50435010);; 高等学校博士学科点专项科研基金资助项目(20050008024);; 国家科技支撑计划(2006BAF04B03)

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