锻压技术

多规格椭球瓜瓣充液拉深成形回弹控制

英文标题：Springback control on hydroforming for various specifications ellipsoidal scalloped segment

分类号：TG394

出版年,卷(期):页码：2019,44(8):55-60

摘要：

以多种规格椭球瓜瓣为研究对象，运用Dynaform软件，模拟充液拉深成形工艺过程，基于得到的自由状态回弹量计算结果，研究依靠增大压边力、增加拉延筋的工艺方法，初步实现回弹控制，模拟结果显示回弹减至4.87 mm以内。针对型面方程一致的特点，研究1套模面补偿兼容全部规格椭球瓜瓣的回弹控制，对模具型面进行了二次回弹补偿优化，并根据实际回弹数据最终完成实际型面补偿。通过现场试验获得了型面精度满足设计要求的所有合格产品，全部回弹量有效地控制在1 mm以内。结果表明，采用工艺参数控制和兼容性的型面补偿实现了1套模具成形多规格瓜瓣的回弹控制，验证了仿真过程的有效性和实用性，减少了试模费用和开发周期。

For the ellipsoid scalloped segment of various specifications, the process of hydroforming was simulated by software Dynaform. Based on the calculation results of springback obtained by free state, the springback control was realized initially by increasing the blank holding force and the drawing bead. The simulation result shows that the springback is reduced to less than 4.87 mm. In view of the consistent characteristic of the profile equation, the springback control of the die surface compensation with all specifications of ellipsoidal scalloped segment was studied, the die surface was optimized for the second springback compensation, and the actual profile compensation was finally completed according to the actual springback data. Furthermore, all qualified products meeting the design requirements of profile accuracy were obtained by tests, and the total amount of springback was effectively controlled within 1 mm. The results show that the springback control of multispecification ellipsoid scalloped segment forming with a set of dies can be realized by process parameter control and compatible profile compensation, which verifies the effectiveness and practicability of the simulation process and reduces the cost of die test and development cycle.

基金项目：

天津市科技计划项目（17YFZCGX00530）

作者简介：田恕（1987-），女，硕士，工程师 Email：tian6shu@163.com

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