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等离子体弯曲成形技术能应用于高硬和脆性板材的弯曲成形。在等离子体电弧直线扫描金属板材弯曲成形时,发现板材弯曲后形成的棱边出现翘曲和弯曲角随扫描路径变化现象,即棱边效应,棱边效应会降低工件的成形精度,导致工件不能满足装配精度要求和使用寿命缩短。为了揭示棱边效应产生的原因和成形规律,实验研究了棱边效应的成形规律,并建立了板材等离子体弯曲成形的数值模型。根据计算结果对棱边效应的成形机理进行了深入分析,这能为后续优化成形工艺和减缓棱边效应对成形精度的影响提供理论依据。
Plasma bending forming technology can be applied to high hardness and brittle sheet bending. In the plasma arc linear scanning of sheet metal bending forming, it is found that the curvature of the sheet formed after bending the bending angle and bending angle with the scanning path change phenomenon, namely, the edge effect, the edge effect will reduce the forming accuracy of the workpiece, resulting in the workpiece can not Meet the assembly accuracy requirements and shortened service life. In order to reveal the reason of the edge effect and the forming rule, the law of the edge effect was experimentally studied, and the numerical model of sheet metal plasma bending was established. According to the calculation results, the forming mechanism of the edge effect is deeply analyzed, which can provide the theoretical basis for the subsequent optimization of the forming process and the effect of reducing the edge effect on the forming accuracy.