锻压技术

平行辊矫直对板材残余应力的影响

英文标题：Effect of parallel roll straightening on residual stress of sheet

作者：邢伟荣孔德文张红伟

分类号：TG333.4

出版年,卷(期):页码：2021,46(12):100-104

摘要：

采用X射线衍射法对屈服强度为900 MPa的特种金属板材矫直前后的残余应力进行测量，以分析不同辊系布局和调节方式的平行辊矫直对降低板材残余应力的影响。结果表明，平行辊矫直能有效降低板材残余应力，不同辊系布局和调节方式的精密平行辊矫直机对板材矫直残余应力的影响不同。采用上排辊整体升降、两边辊可单独调整的辊系调整方式，矫直后纵向残余应力降低50%以上，横向残余应力降低不明显；采用各上辊可单独调整结构形式的辊系调整方式，矫直后纵向和横向残余应力的降低幅度均在50%以上，对降低特种金属板材的残余应力值具有较好的效果。

The method of X-ray diffraction was adopted to measure the residual stress before and after straightening of special metal sheet with the yield strength of 900 MPa to analyze the effect of parallel roll straightening with different roll system layouts and adjustment methods on reducing the residual stress of sheet. The results show that the parallel roll straightening can effectively reduce the residual stress of sheet, and the precision parallel roll straightener with different roll system layouts and adjustment methods have different effects on the residual stress of the sheet straightening. Using the roll system adjustment method in which the upper row of rolls are lifted and lowered as a whole and the rolls on both sides can be adjusted separately, the longitudinal residual stress is reduced by more than 50% after straightening, while the transverse residual stress is not significantly reduced. Using the roll system adjustment method in which the structure styles of various upper rolls are lifted independently, the longitudinal and transverse residual stresses are reduced by more than 50% after straightening, which has a better effect on reducing the residual stress values of special metal sheet.

基金项目：

邢伟荣（1966-），男，工学学士，教授级高级工程师 E-mail：xing_wr@163.com

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