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摘要：
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针对飞机蒙皮拉伸成形工艺中的包覆成形方式,基于有限元软件PAM-STAMP 2G平台,利用其二次开发工具Stamp Tool Kit,开发蒙皮拉形工艺仿真专用系统。将复杂的前置处理过程进行封装,可方便地对带弹性垫层的可重构柔性模具蒙皮拉形包覆成形过程进行弯曲、成形、切边及回弹过程模拟。系统实现了对飞机蒙皮拉形成形质量的预测,有较强的实用性和可靠性。针对所开发的系统,研究了不同垫层厚度对抑制成形板料表面压痕的规律,发现对于可调钉柱其截面尺寸为30 mm×30 mm的柔性模具,垫层厚度大于等于25 mm时可达到很好抑制表面缺陷的目的。
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Based on Stamp Tool Kit in PAM-STAMP 2G program,a special sheet metal stretch-forming simulation system was developed for draping forming.Encapsulating complex preprocess setting,this system could simulate the bending,stretch forming,trimming and springback process over the reconfigurable compliant tooling.There were practicability and reliability in pre-estimating the qualities of forming parts.Using the simulation system,the rule of diffirent interpolator thicknesses on suppressing dimples in sheet metal was analyzed.The results show that the thickness over 25mm can realize the aim of restraining the surface defects on a skin part which is stretchformed over reconfigurable tooling with pins of 30mm×30mm cross section.
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基金项目：
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国家高技术研究发展计划(863计划)(2006AA04Z143)
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作者简介：
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参考文献：
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[1]陈丽.蒙皮拉形可重构柔性模具研制及关键技术研究[D].北京:北京航空航天大学,2006.
[2]李明哲,裴永生,徐建丽.薄板类多点成形过程的数值模拟[J].材料科学与工艺,2004,12(4):379-382.
[3]张彦敏.飞机蒙皮拉伸成形工艺优化研究[D].北京:北京航空航天大学,2007.
[4]李卫东,万敏,韩金全.飞机蒙皮数字化拉形系统ASSF-CAE[J].航空制造技术,2007,(291):498-503.
[5]Anagnostou E L.Optimized tooling design algorithm for sheetmetal forming over reconfigurable compliant tooling[D].Stony Brook:State University of New York,2002.
[6]吴志敏.飞机蒙皮数控拉形机数字样机建模和工艺仿真分析[D].北京:中国农业大学,2007.
[7]孙刚,李明哲,蔡中义,等.多点成形时工艺方式与工件压痕的关系研究[J].材料科学与工艺,2004,12(4):360-363.
[8]汪华.飞机蒙皮多点成形柔性垫层技术研究[D].北京:北京航空航天大学,2007.
[9]官英平,张庆,赵军.中性层内移对弯曲回弹的影响[J].锻压技术,2007,32(2):26-28.
[10]Wisselink H H,Van Den Boogaard A H.Finite element sim-ulation of the stretch forming of aircraft skins[A].Smith LM,Pourboghrat F,Yoon J W,et al.CP778 Volume A,Numisheet 2005[C].Detroit:American Institute of Phys-ics,2005.
[11]PAM-STAMP User s Guide[Z].France:ESI Group,2007.
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