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Abstract：
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Taking the CNC milling short shell panel of 2219 ceramic-aluminum material in the launch vehicle tank as research object，through the analysis of product structure characteristics, the boss and grid areas were partitioned and formed by four-axis roll bending method, and the clamping gap of upper and lower shafts and the pressing amount were reasonably controlled. Then, the influence mechanism for the thickness of auxiliary ribs at the upper and lower ends of heading on the forming process parameters and the profile accuracy was explored to realize the engineering application of 2219 ceramic-aluminum material. The results show that the plastic flow of materials and the relative bending radius are influenced by the thickness of auxiliary ribs under the same radius of module curvature, and the forming process parameters and the product accuracy are restricted by three-dimensional stress in bending. In addition, when the thickness of auxiliary ribs is 6 mm, it produces a larger proportion of plastic deformation than that when the thickness is 5 mm, and it is easier to meet the requirements of forming curvature, which has a significant impact, but it has little effect on the arc forming accuracy. Finally, when there are three auxiliary ribs with the thickness of 5 mm at the upper and lower ends of heading for the CNC milling short shell panel, the arc gap clearance, the straightness of welding zone and the straightness of grid area are controlled within 2, 1.5 and 2.5 mm, respectively.
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Funds：
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天津市科技支撑项目（17YFZCGX00530）
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AuthorIntro：
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作者简介：李继光（1981-），男，博士，高级工程师，E-mail：jiguangli2008@126.com
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Reference：
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