铝合金翼座热塑性挤压成形模拟分析

Thermoplastic Extrusion Forming Simulation of Aluminium Alloy Wing Seat

目的采用热塑性挤压法进行近净成形,以克服铝合金切削法工序多、加工余量大、材料利用率低的缺点。方法利用Deform-3D软件对翼座热塑性成形过程进行数值模拟,分析比较了单向挤压、双向挤压过程的特点、成形效果及所需加载载荷大小。结果在模拟过程中,单向挤压方案与双向挤压方案均出现了挤压缺陷,通过增加压余厚度成功解决了双向挤压方案的挤压缺陷,且双向挤压所需最大载荷要小于单向挤压。结论双向挤压方案要优于单向挤压方案。对双向挤压方案进行试验试制,获得了健全的铝合金翼座,为零件大批量生产提供了有力支持。

The paper aims to achieve near-net forming through thermoplastic extrusion to overcome the disadvantages of the cutting method for aluminum alloy such as many processes, large working allowance and low stock utilization. The Deform-3D software was used to numerically simulate the thermoplastic forming process of the wing seat. Characteristics of the unidirectional extrusion and biaxial extrusion process, the forming effect and the required loading load were analyzed and compared. In the simulation process, extrusion defects occurred in both the one-way extrusion scheme and the two-way extrusion scheme. The extrusion defect of the two-way extrusion scheme was successfully solved by increasing the thickness of the excess pressure. The maximum load required for the two-way extrusion was also less than one-way extrusion. The two-way extrusion scheme is superior to the one-way extrusion scheme. The pilot trial of a two-way extrusion program results in a sound aluminum alloy wing seat, which provides strong support for mass production of parts.