锻压技术

中大直径钢材棒料二辊矫直机凹辊设计方法

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

作者：吴优王敏杰魏兆成马日光

单位：大连理工大学

分类号：TH122

出版年,卷(期):页码：2018,43(6):80-88

摘要：

针对某钢厂中大直径钢材棒料二辊矫直存在矫直质量差的问题进行研究，利用矫直过程中棒材曲率比与矫直次数的关系并与矫直机理相结合，最后确定出正确的凹辊辊型。采用Φ50~Φ70 mm直径范围内不同直径的中大棒材对设计凹辊进行试验验证，利用相应的精度测量仪器分别测量矫直后不同直径棒材的直线度、椭圆度、表面质量并对压扁率进行计算。试验结果表明：所设计的凹辊辊型使矫直后中大直径棒材具有高精度，直线度误差分布范围为0.1~0.6 mm·m-1；椭圆度误差小于0.1 mm，扁率分布范围为0.5‰~1.8‰；矫直后中大直径棒材表面粗糙度为微米数量级，表面光滑，无划痕现象产生，设计凹辊起到滚光棒材的作用。

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.

基金项目：

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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