Research on Delamination Mechanism of Conventional Blanking for Laminated Shim Stock

ZHU Lianping; SUN Xiaofeng; ZHUANG Xincun; SUN Xiaolong; GAO Salei; HE Xueting

doi:10.16080/j.issn1671-833x.2022.04.095

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Research on Delamination Mechanism of Conventional Blanking for Laminated Shim Stock

更新时间：2025-10-30

- Research on Delamination Mechanism of Conventional Blanking for Laminated Shim Stock
- Aeronautical Manufacturing Technology Vol. 65, Issue 4, Pages: 95-99(2022)
- 作者机构：
  
  1. 中国商飞上海飞机制造有限公司,上海,201324
  2. 上海交通大学模具 CAD 国家工程研究中心,上海,200030
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2022.04.095
  CLC：
- Published：2022
- 稿件说明：
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朱莲萍，孙小峰，庄新村，孙晓龙，高洒蕾，何雪婷 . 可剥垫片普通冲裁分层机理研究[J]. 航空制造技术, 2022, 65(4): 95-99.

ZHU Lianping，SUN Xiaofeng，ZHUANG Xincun，SUN Xiaolong，GAO Salei,HE Xueting. Research on Delamination Mechanism of Conventional Blanking for Laminated Shim Stock[J]. Aeronautical Manufacturing Technology, 2022, 65(4): 95-99.
朱莲萍，孙小峰，庄新村，孙晓龙，高洒蕾，何雪婷 . 可剥垫片普通冲裁分层机理研究[J]. 航空制造技术, 2022, 65(4): 95-99. DOI： 10.16080/j.issn1671-833x.2022.04.095.

ZHU Lianping，SUN Xiaofeng，ZHUANG Xincun，SUN Xiaolong，GAO Salei,HE Xueting. Research on Delamination Mechanism of Conventional Blanking for Laminated Shim Stock[J]. Aeronautical Manufacturing Technology, 2022, 65(4): 95-99. DOI： 10.16080/j.issn1671-833x.2022.04.095.

摘要

可剥垫片又称层撕垫片，由多层片状材料黏合而成，常用于调节装配间隙，在飞机制造过程中发挥着重要的作用。现有可剥垫片的制造方式主要是机械铣切和普通冲裁，这两种下料方式都有可能在剪切边缘出现分层问题。针对可剥垫片普通冲裁工艺中剪切面上出现的分层问题进行了试验研究，建立了可剥垫片的普通冲裁的二维有限元仿真模型，模型采用了Cockroft–Latham损伤模型对冲裁过程中断面损伤进行了分析。结合仿真与试验结果，发现普通冲裁过程中，金属不同的变形行为是出现分层的主要原因。

Abstract

Laminated shim stock

also known as peelable shims

is made of multi-layer sheet materials. Laminated shim stock is often used to adjust the assembly clearance and plays an important role in the aircraft manufacturing process. The existing manufacturing methods of the laminated shim stock is mainly mechanical milling and conventional blanking

both of which might have delamination phenomenon. In this research

the delamination on the sheared edge in the conventional blanking process of the laminated shim stock is studied. A conventional blanking finite element model of the laminated shim stock is established as well

the Cockroft-Latham damage model is used to analyze damage in the blanking process. It is found from the results of simulation and experiment that the various material behaviors of cross section is the main cause of delamination on the sheared edge.

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