搅拌摩擦焊接热输入数值模型

Numerical model of heat input from rotational tool during friction stir welding

根据搅拌摩擦焊接特点,建立了轴肩、柱形搅拌针和锥形搅拌针热输入数值模型,并分别讨论了搅拌针锥角对轴肩和锥形搅拌针热输入的影响。结果表明,锥角增大,轴肩热输入降低;锥形搅拌针侧面热输入增大;搅拌针端面热输入降低;搅拌针总的热输入先下降,然后迅速上升。

This paper has established the numerical models of the heat generation from the shoulder, the cylinder-shape and the cone-shape pins (including pin sideface and endface) during friction-stir welding. The effect of pin angle on the heat generation from the cone-shape pin has been analyzed. The results confirm that the heat generation from the shoulder and the cone-shape pin endface decreases, and the heat generation from the cone-shape pin sideface increases when pin angle increases. However, the general heat generation from the cone-shape pin decreases firstly, then increases rapidly, with pin angle increasing.