【作者】 李占华； 韩静涛； 路瑞龙； 刘靖；

【Author】 Li Zhan-hua;Han Jing-tao;Lu Rui-long;Liu Jing;University of Science and Technology Beijing;

【机构】 北京科技大学；

【摘要】 自驱动与在轨支撑一体化的弹性卷筒为电磁监测卫星伸杆机构的核心部件,用于探测仪器的支撑展开,对电磁探测任务的完成至关重要。但由于形状上的特殊性,其成形难度较高。本文采用拉压复合连续弯曲成形的方法制备弹性卷筒,得到了具有高稳定性等自然曲率的冷成形制件,避免了热处理造成的形状尺寸精度损失。通过试验的方式,对此方法成形弹性卷筒的关键工艺参数模具间隙、后张力、成形速率、坯料材质、带宽、带厚等进行了研究。结果表明:模具间隙与成形角分别为调整成形直径与螺旋角的主控因素;间隙较小时,高弹性极限材料的成形直径相对较小,随间隙增加,趋势随之相反;在成形速率小于700mm·min-1,后张力在0N-1700N时,对成形直径的影响很小,这有利于弹性卷筒成形结果稳定性的提高。更多还原

【Abstract】 Stacer with characteristics of self-driving and support on orbit is the core component for deployable device of electromagnetic monitoring satellite. It is used to support and extend detecting instruments, it plays an important role in electromagnetic detection tasks. However, it is difficult to be formed due to special shape. In this paper, the process of compositing stretch and press bending is used to forming stacer. Cold formed parts with high stability and equal natural curvature are obtained. The precision loss caused by heat treatment is avoided. According to experimental investigation, the key process parameters such as die gap, post tension, forming speed, material quality, strip width and thickness is studied. Results show that the main control factors of forming diameter and helix angle are the die gap and the forming angle respectively. When the die gap is small, the forming diameter of the material with high elastic limit is relatively small. While, with the increase of the die gap, the trend is opposite. When the forming speed is less than 700 mm·min-1, the post tension is in the range of 0 N-1700 N, it has little influence on the forming diameter, which is beneficial to the stability of stacers obtained.更多还原