Transactions of Materials and Heat Treatment

Title：Design on concave roller shape of tworoller straightener for mediumlarge diameter steel bars

Authors： Wu You Wang Minjie Wei Zhaocheng Ma Riguang

Unit： Dalian University of Technology

KeyWords： concave roller shape straightness ellipticity flattening ratio surface quality

ClassificationCode：TH122

year,vol(issue):pagenumber：2018,43(6):80-88

Abstract：

The problem of low straightening quality in tworoller straightening for mediumlarge diameter steel bars was analyzed, and the correct concave roller shape was determined by combining the relationship between curvature ratio and straightening times and straightening mechanism in the process of straightening. Then, the designed concave roller was verified by different mediumlarge diameter bars with diameter in Φ50-Φ70 mm, and their straightness, ellipticity and surface quality were measured respectively by corresponding precision measuring instrument and flattening ratio was calculated. The experimental results show that the designed concave roller shape can ensure high precision of the bars with the range of straightness error of 0.1-0.6 mm·m-1, ellipticity error less than 0.1 mm and the range of flattening ratio of 0.5‰-1.8‰ after straightening. Therefore, the surface roughness of mediumlarge diameter bars is on the order of micrometers, and the surface is smooth without scratch phenomenon after straightening. Thus, the designed concave roller plays the role of rolling bar.

Funds：

辽宁省自然科学基金资助项目（201602174）

吴优(1993-)，男，硕士研究生；Email：18342202640@163.com；通讯作者：王敏杰(1958-)，男，博士，教授；Email: mjwang@dlut.edu.cn

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