锻压技术

变曲率双环绕深筋加强蒙皮橡皮囊刚柔耦合成形技术

英文标题：Flexible and rigid coupling technology on rubber forming for variable curvature double surround deep ribs reinforcing skin

作者：白颖司继祥孟文博王永兴李世峰张立

单位：中航西安飞机工业集团股份有限公司

关键词：橡皮囊成形加强蒙皮加强筋刚柔耦合成形压力

分类号：TG386

出版年,卷(期):页码：2022,47(10):124-132

摘要：

变曲率双环绕深筋加强蒙皮的材料薄、成形极限低、加强筋深度大，通过胀形理论分析确定了传统橡皮囊一次成形方案不可行。针对PAMSTAMP 2G橡皮囊一次成形加强蒙皮的等效应力云图和材料厚度变化云图的分析结果，确定了失稳抑制柔性介质工装设计结构，以及橡皮囊多道次成形缺陷控制方案。采用以凸曲率筋形的压型模和长条形橡皮板组合工装进行橡皮囊多道次聚料成形，以凹曲率筋形的校形模和眼镜框型橡皮块组合工装进行橡皮囊多道次屈曲校形，并通过试验加以验证。结果表明：有序填放橡皮板可实现可控式储料，使用镂空柔性橡皮块可实现嵌入式压-胀校形，减小了加强蒙皮的屈曲变形和回弹。采用刚柔耦合组合工装结构的橡皮囊多道次成形方法可提高传统橡皮囊成形深筋结构的高度极限。

The reinforcing skin with variable curvature double surround deep ribs has thin material, low forming limit and large reinforcing rib depth, its traditional rubber forming at one time is not feasible by bulging theory analysis. Therefore, based on the conclusion analysis of equivalent stress nephogram and material thickness change nephogram of reinforcing skin by PAM-STAMP 2G rubber one-time forming, the design structure of flexible medium tooling for instability suppression and the defect control scheme of multi-pass rubber forming were determined. The combination tooling of the forming die with convex curvature rib shape and the long rubber plates was used for multi-pass rubber aggregated forming, and the combination tooling of the sizing die with concave curvature rib shape and the eyeglass frame rubber block was used for multi-pass rubber forming of buckling correction, which were tested by experiment. The results show that the orderly filling of rubber plates can realize controllable material storage, and the use of hollow flexible rubber block can realize embedded pressure-expansion sizing, which reduces the buckling deformation and springback of reinforcing skin. Thus, the multi-pass rubber forming with rigid and flexible coupling combined tooling structure can improve the height limit of the traditional rubber forming deep rib structure.

基金项目：

白颖（1972-），女，学士，研究员级高工,E-mail：baiyingsyh@163.com

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