Research on Control Method of Surface Groove of Titanium Alloy SPF/DB Four-Sheet Structure

LI Baoyong; ZHANG Tiejun; ZHANG Kaifeng; YAO Wei; QIN Zhonghuan; LIU Qi; LIU Wei

doi:10.16080/j.issn1671-833x.2020.21.063

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Research on Control Method of Surface Groove of Titanium Alloy SPF/DB Four-Sheet Structure

更新时间：2025-10-30

- Research on Control Method of Surface Groove of Titanium Alloy SPF/DB Four-Sheet Structure
- Aeronautical Manufacturing Technology Vol. 63, Issue 21, Pages: 63-67(2020)
- 作者机构：
  
  1. 哈尔滨工业大学材料学院,哈尔滨,150001
  2. 北京航星机器制造有限公司,北京,100013
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2020.21.063
  CLC：
- Published：2020
- 稿件说明：
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李保永，张铁军，张凯锋，姚为，秦中环，刘奇，刘伟. 钛合金超塑成形/扩散连接四层结构表面沟槽控制方法研究[J]. 航空制造技术, 2020, 63(21): 63-67.

LI Baoyong,ZHANG Tiejun,ZHANG Kaifeng,YAO Wei,QIN Zhonghuan,LIU Qi,LIU Wei. Research on Control Method of Surface Groove of Titanium Alloy SPF/DB Four-Sheet Structure. Aeronautical Manufacturing Technology, 2020, 63(21): 63-67.
李保永，张铁军，张凯锋，姚为，秦中环，刘奇，刘伟. 钛合金超塑成形/扩散连接四层结构表面沟槽控制方法研究[J]. 航空制造技术, 2020, 63(21): 63-67. DOI： 10.16080/j.issn1671-833x.2020.21.063.

LI Baoyong,ZHANG Tiejun,ZHANG Kaifeng,YAO Wei,QIN Zhonghuan,LIU Qi,LIU Wei. Research on Control Method of Surface Groove of Titanium Alloy SPF/DB Four-Sheet Structure. Aeronautical Manufacturing Technology, 2020, 63(21): 63-67. DOI： 10.16080/j.issn1671-833x.2020.21.063.

摘要

通过有限元数值模拟和物理试验相结合方法，对超塑成形 / 扩散连接（SPF/DB）四层结构表面沟槽形成原因进行了分析和研究，采用正交试验方法分析了应变速率 έ、扩散连接宽度 b、芯层与蒙皮厚度比 t 和摩擦系数 u 这 4 个因素对蒙皮表面沟槽深度的影响。结果表明，对蒙皮表面沟槽形成影响最大的因素为芯层与蒙皮厚度比 t。通过试验研究，提出了一种对蒙皮表面施压背压的方法，可有效避免或控制超塑成形 / 扩散连接四层结构蒙皮表面沟槽的形成。

Abstract

In this paper

through the combination of the finite element numerical simulation and the actual test

the causes of the surface groove formation of superplastic forming/diffusion bonding (SPF/DB) four-sheet structure are analyzed and studied. The orthogonal test method is used to analyze the influence of four factors on the surface groove of the panel

including the strain rate έ

the diffusion connection width b

the thickness ratio t of the core plate to the panel and the friction coefficient u of the die. It can be seen that the thickness ratio t of the core plate to the panel is the most important factor of the surface groove of the panel. Based on the experimental study

a method of pressing 0.2MPa back pressure on the panel surface is proposed

which can effectively control the formation of the surface groove of SPF/DB four-sheet structure.

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