RB/SPF of Superplastic Aluminum Alloy Sheets by GAS GENERANTS

气体发生器超塑性铝合金板的 RB/SPF

基本信息

批准号：
10650717
负责人：
OSAWA Hiroaki
金额：
$ 1.66万
依托单位：
Hosei University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650717/
关键词：
Gass Generant Superplasticity Aluminum Alloy RB SPF Truss Structure ハニカム構造

项目摘要

Superplastic forming of aluminum alloy sheets was tentatively carried out, in which instead of using inert gas or air gas blowing, dilational work of inert gas during increasing temperature is utilized. Inert gas can be obtained by thermal decomposition of some chemical substances, so called GAS GENERANTS. Conventional forming apparatus for superplastic blow forming may be simplified and therefore cost down by applying this idea actually. Improvement of working conditions are also brought about at the same time. SuperPlastic Forming/Diffusion Bonding (SPF/DB) is known as a very effective way of forming, especially in USA for making hollow structural components of air plane's body structure. Feasibility of actual forming of superplastic aluminum alloy sheets by using GAS GENERANT and of making hollow structural component such as truss structure by not DB but Roll Bonding (Roll Bonding) were explored.Detailed experimental examination reveals that some problems that must be solved would be occurred ;1. Selection of materials of STOP OFF added GAS GENERANT and best volume fraction of each drug.2. Pressure in the formed sheet during cooling down happens to go down to very low value, less than atmospheric pressure. In this case, if the thickness of formed part is very thin, a kind of buckling would be occfurred. The problem is how to protect this.3. Bonding strength between two sheets after roll bonding must be maintained high enough.4. Precise rolling process is also needed for avoiding the distortions of pattern printed.Warm rolling machine was newly introduced for examining and solving these items and the optimum combination of skin and core materials was selected in the beginning. Surface treatment before roll bonding was improved as well. Finally formed components through this process that seems to be suitable actual use were obtained successfully.

暂定地进行了铝合金板的巨型形成，其中利用了惰性气体的扩张性，而不是使用惰性气体或空气吹气，而是利用惰性气体的扩张性工作。惰性气体可以通过某些化学物质的热分解获得，即所谓的气体构成。可以简化用于超塑性打击的常规形成设备，因此实际上应用此想法来降低成本。同时还带来了工作条件的改善。超塑性形成/扩散键合（SPF/dB）被称为一种非常有效的形成方式，尤其是在美国制造空气平面体结构的空心结构成分。通过使用气体生成剂和使空心结构成分（例如桁架结构）不是通过DB而不是DB而不是滚动键合（滚动键合），从而探索了诸如桁架结构（滚动键合），从而探索了诸如桁架结构（滚动键合），从而探索了实验性的实验检查表明，必须解决的一些问题将发生； 1。选择停止添加的气体通量和每种药物的最佳体积分数的材料。2。冷却过程中形成的纸板的压力恰好下降到非常低的值，而小于大气压力。在这种情况下，如果形成的部分的厚度非常薄，则会出现一种屈曲。问题是如何保护这一点。3。滚动键合后两张纸之间的粘结强度必须保持足够高。4。还需要精确的滚动过程来避免图案印刷的扭曲。新介绍了用于检查和解决这些物品的滚动机，并在开始时选择了皮肤和核心材料的最佳组合。滚动粘结之前的表面处理也得到改善。最终通过此过程形成了似乎是合适的实际使用的组件。