铝合金电弧增材制造焊道宽度尺寸预测

发布时间：2019-05-16 20:35

【摘要】：文中首先采用同一组焊接参数,在四种厚度基板上进行单道20层铝合金薄壁试样成型,发现不同厚度基板下试样稳定区的焊道宽度相同.基于此结论,利用二次通用旋转组合方法设计试验样本,通过二次回归方程建立工艺参数(焊接电流、焊接速度、送丝速度、层间温度)与成型试样稳定区域焊道宽度尺寸预测模型,经验证发现模型预测效果较好.结果表明,影响焊道宽度的主要因素有焊接电流、焊接速度和层间温度.当电流小于95 A时,参数对焊道宽度的影响顺序为:电流大于焊接速度大于层间温度;当电流大于95 A时,顺序变为:电流大于层间温度大于焊接速度.同时,焊接电流和层间温度间存在交互作用.
[Abstract]:In this paper, a single pass 20-layer aluminum alloy thin-wall specimen is formed on four kinds of thickness substrate by using the same group of welding parameters, and it is found that the width of weld bead in the stable zone of the specimen under different thickness substrate is the same. Based on this conclusion, the test samples are designed by quadratic general rotation combination method, and the process parameters (welding current, welding speed, wire feeding speed) are established by quadratic regression equation. The prediction model of weld bead width and size in stable zone of molding sample shows that the prediction effect of the model is good. The results show that the main factors affecting the width of welding bead are welding current, welding speed and interlaminar temperature. When the current is less than 95 A, the order of the influence of the parameters on the weld bead width is as follows: the current is greater than the welding speed, and when the current is greater than 95 A, the order is that the current is greater than the interlayer temperature and the welding speed is greater than the welding speed. At the same time, there is interaction between welding current and interlayer temperature.
【作者单位】：哈尔滨工业大学先进焊接与连接国家重点实验室;
【分类号】：TG444.74

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