Transactions of Materials and Heat Treatment

Title：Effect of parallel roll straightening on residual stress of sheet

Authors： Xing Weirong Kong Dewen Zhang Hongwei

Unit： Tai′an Hualu Metalforming Machine Tool Co. Ltd.

KeyWords： sheet residual stress parallel roll straightening roll system adjustment method

ClassificationCode：TG333.4

year,vol(issue):pagenumber：2021,46(12):100-104

Abstract：

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.

Funds：

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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