为了预测铝合金胶接接头固化过程中固化度的变化规律.通过实验对5A02铝合金胶接接头固化过程中的传热特征进行分析,在忽略胶层所释放的内热的前提下,将胶接接头简化为一集总热源系统.根据热传导理论,获得了胶接接头固化过程中温度变化的解析预测公式,并结合胶黏剂的固化动力学方程,得到了胶接接头固化过程中固化度的预测方法.通过实验对接头固化度的计算结果进行了验证,证明固化度解析预测方法的合理性.讨论了接头固化工艺参数及几何参数对固化度的影响规律,发现增加固化温度会明显提高接头的固化速率;增加预热温度或减小铝合金板不能提高接头的固化速率,但会导致接头固化提前开始;当铝合金板厚较大时,增加预热温度对促进胶黏剂固化的影响会更加明显;因此,对于车身结构中铝板较厚的部位,采用增加预热温度的方法能够较好的提高铝板胶接结构的固化度.
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