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首次开发利用氩气的压力胀形和轴向加载的复合超塑性工艺成形技术制造钛合金波纹管的新工艺 ,可加工多波U型钛合金波纹管。超塑成形采用多层模结构 ,用模具来控制波形。超塑成形加载过程分为胀形、合模和定型 3个阶段 ,以使成形件的壁厚分布均匀。确定了筒坯的下料尺寸 ;给出了各个成形阶段胀形气压和保压时间的计算公式 ;通过超塑胀形实验成形了Ti 6Al 4V钛合金双波波纹管。
The first development of the use of argon pressure bulging and axial loading of the composite superplastic forming technology for the manufacture of titanium alloy corrugated pipe of the new technology can be processed multi-wave U-shaped titanium bellows. Superplastic forming multi-layer mold structure, with the mold to control the waveform. Superplastic forming process is divided into bulging bulging, clamping and setting three stages, so that the shape of the wall thickness distribution. The formula of blanking pressure and dwell time in each forming stage is given. The Ti 6Al 4V titanium double-bellow corrugated pipe is formed by superplastic bulging test.