变压边力控制对拼焊板成形性能的影响研究

分析了控制焊缝移动的拼焊板薄厚两侧所需的压边力关系式,并据此提出了变压边力控制方案。通过数值模拟对比分析了不同方案的冲压结果,验证了:减少厚侧压边力可有效的降低焊缝向薄侧的移动量,从而降低薄侧材料应力集中,改善应力状态,大大提高了拼焊板的成形性能。

The Study of Variable Blank-holder Pressure Controlling Technology in Improvement of Formability of Tailor-welded Plate

The paper analyzed the relational expression of blank-holder pressures needed for the thick and thin sides of a tailor-welded plate under the control of displacement of welding seam and proposed a stamping forming plan under variable blank-holder pressure controlling. The numerical simulation technology was applied to simulate the stamping process under different plans. The result proved that the pressurization of smaller force on the thick side than that on the thin side can effectively diminish the displacement of welding seam and the stress concentration in the thin side which improved the forming performance of the tailor-welded plate.