Influence Analysis of Edge Wrinkling in Variable Cross-section Structural Parts Based on Forming Trajectory Parameters
When flexible roll forming parts with bending characteristics,the edges of the sheet are prone to wrinkling,which affects the product performance and assembly of the formed structural parts.Based on the forming trajectory of the arc line,the trajectories are broken down to get the characteristic elements in the forming trajectory.The relationship between parameters are explored such as line length,arc radius,and web width,and edge wrinkling phenomenon.ABAQUS is used to complete 32 simulation experiments and uses Python to preprocess the simulation results to obtain edge wrinkling values.Subsequently,the Spearman correlation coefficient is used for edge wrinkling factor analysis,and regression prediction is made based on wrinkling factors.The experimental results show that the concave arc radius,minimum web width,convex arc radius,web width difference,and maximum web width positively correlate with edge wrinkling,with positive correlation coefficients of 0.03,0.13,0.28,0.34,and 0.42,respectively.Moreover,the maximum edge wrinkling is more likely to occur in the convex arc area;the board's straight-line length and tangent line length are negatively correlated with edge wrinkling,with negative correlation coefficients of-0.08 and-0.21,respectively.Linear transition connections can effectively reduce edge wrinkling.The existing trajectory parameters have poor regression prediction performance for edge wrinkling,and further supplementation of trajectory features is needed to increase the experimental dataset.
flexible roll formingedge wrinklingvariable cross-sectionSpearman correlation coefficient
万方数据
维普
