不锈钢板式热沉液压胀形工艺参数仿真分析

不锈钢板式热沉具有低温性能好、生产周期短、生产成本低等特点，已经广泛应用于国外航天器环境模拟试验设备中，是热沉发展的新趋势。为掌握不锈钢板式热沉的加工工艺，建立不锈钢热沉液压胀形有限元分析模型，研究滚弯预成形工序、边界压紧力和焊点布局等工艺参数对热沉位移分布、应变分布和厚度分布的影响，以及焊点布局、胀形压力对流道高度和成形均匀性的影响规律，得到合理的工艺参数，为航天器真空热试验用不锈钢板式热沉的研制和生产提供了指导。研究成果目前已成功应用于KM8为代表的空间环境模拟器的百余套热沉研制中，取得了良好效果。

Simulation of hydo-bulging process of stainless-steel plate heat sink

The stainless-steel plate heat sink, with its good low-temperature performance, the short production cycle and the low production cost, is widely used in the environmental simulation test facilities for spacecraft abroad. In order to have a good command of the hydro-bulging technique of the stainless-steel plate heat sink, the hydro-bulging of stainless-steel plate heat sink is numerically simulated by using a finite element model. The effects of the process parameters, including the rolling prestress, the boundary pressure and the solder joint layout, on the forming process, as well as the relationship between the forming pressure and the runner height and the height uniformity are investigated. The reasonable process parameters are obtained, to serve a guidance for the development and the production of the stainless-steel plate heat sink for the spacecraft thermal vacuum test. These results have been successfully applied to the development of more than one hundred sets of the heat sinks for space environmental simulators represented by the KM8.