Study on Stretching and Forming of Super-Thick Double Protruding Skin

HE Gang; ZHANG Qianwen; ZHAO Hu

doi:10.16080/j.issn1671-833x.2018.13.085

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Study on Stretching and Forming of Super-Thick Double Protruding Skin

更新时间：2025-10-30

- Study on Stretching and Forming of Super-Thick Double Protruding Skin
- Aeronautical Manufacturing Technology Vol. 61, Issue 13, Pages: 85-89(2018)
- 作者机构：
  
  航空工业西安飞机工业（集团）有限责任公司,西安,710089
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2018.13.085
  CLC：
- Published：2018
- 稿件说明：
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何刚，张骞文，赵虎. 超厚双凸起蒙皮拉伸成形技术研究[J]. 航空制造技术, 2018, 61(13): 85-89.

HE Gang, ZHANG Qianwen, ZHAO Hu. Study on Stretching and Forming of Super-Thick Double Protruding Skin. Aeronautical Manufacturing Technology, 2018, 61(13): 85-89.
何刚，张骞文，赵虎. 超厚双凸起蒙皮拉伸成形技术研究[J]. 航空制造技术, 2018, 61(13): 85-89. DOI： 10.16080/j.issn1671-833x.2018.13.085.

HE Gang, ZHANG Qianwen, ZHAO Hu. Study on Stretching and Forming of Super-Thick Double Protruding Skin. Aeronautical Manufacturing Technology, 2018, 61(13): 85-89. DOI： 10.16080/j.issn1671-833x.2018.13.085.

摘要

拉伸成形是飞机钣金的基本成形方法。针对超厚蒙皮在拉伸成形过程中容易造成贴模度差等问题，结合有限元模拟分析分别从轨迹设计、回弹应力等方面对超厚蒙皮进行分析，建立了有限元计算模型。分析表明，该蒙皮采用预拉伸– 包覆– 补拉加载轨迹最合适，可以有效保证零件的贴模度。同时，结合有限元计算分析位移控制、压力控制及回弹分析设定合模间距在7mm、合模压力在22t 时，应力、减薄量及回弹量分布均匀。试验验证该参数可以有效控制贴模度，达到设计要求。

Abstract

Stretch forming is the basic method of aircraft sheet metal forming. Because the ultra-thick skin is easy to be tiled during the stretching process

the finite element model is established based on the analysis of the trajectory design and the resilience stress in this paper. Through the analysis of the super-thick double convex skin

the pretensioning–covering–pull-up loading trajectory is the most suitable

and can effectively guarantee the fitting degree of the parts. At the same time

combining with the finite element analysis of displacement control

pressure control and springback analysis set clamping spacing at 22t

clamping pressure at 7mm

the distribution of stress

amount of thinning and the springback amount of uniform distribution

which experiments that the parameters can effectively control tire degree

and achieve the design requirements.

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