铝合金拉杆的热挤压工艺及模具设计

Hot extrusion technology and die design of aluminum alloy pull-rod

分析了高压开关零件LW8-35SF6铝合金拉杆的热挤压成形工艺及模具设计。与传统的加工工艺相比,新工艺采用杆部反挤头部正挤的复合热挤压工艺进行生产,使材料利用率和生产效率大大提高。对铝合金拉杆零件进行了实际生产试验,结果表明,对直径为90 mm、高度为85 mm的棒料进行热挤压成形是可行的,设计制造的挤压模具结构简单、通用性强。采用新工艺增加了坯料尺寸精度,坯料重量减轻72%以上,提高了经济效益;同时,为在小设备上成形变形程度较大的长杆件提供了一种新方法。

The hot extrusion technology and die design of aluminum alloy pull-rod of the high-voltage switch accessory LW8-35SF6 were analyzed. Compared with the traditional manufacturing process, the new hot extrusion technology using bar backward extrusion and head forward extrusion was adopted, which improved the availability and productivity of the materials greatly. Through the commercial production experiment for aluminum alloy pull-rod, it is concluded that the bar with the-diameter of 90 mm and the height of 80 mm can be extruded by hot extrusion forming, the structure of the extrusion die designed is simple and has a strong common utilization. By using this new process, the dimensional precision of billet is improved and the weight is reduced over 72%, which not only increases the economic benefits but also produces a new method to manufacture long pull-rod which is difficult to be deformed on a small machines.