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Mechanical and structural aspects of the C-17 cargo ramp and cargo door ADFS

机译：C-17货物坡道和货物门ADF的机械和结构方面

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摘要

The cargo ramp and cargo door are two major C-17 components that are built in St. Louis, MO and shipped by rail for final assembly in Long Beach, CA. A major portion of the total build time for the ramp and door assemblies consisted of the hand installation of approximately 16,000 moldline fasteners and 19,400 moldline fasteners, respectively, attaching the skin to the substructure. In addition, several thousand fasteners are also installed in the floor sections of the ramp and door. A major cost- savings opportunity existed to reduce the cost of the ramp and door assemblies by automating the installation of these fasteners. Boeing-St. Louis contracted Brotje Automation of Wiefelstede, Germany to design and build an automated drilling and fastening system (ADFS). Automation is expected to reduce cost by reducing the time required to build the ramp and door assemblies. In addition, automation is expected to improve fastener hole quality and fastener installation quality. Another important reason for undertaking this project was to enable Boeing-St. Louis to strengthen its position as an industry leader and innovator in aerospace manufacturing. This paper describes the mechanical and structural challenges (associated with hoisting and supporting the assemblies) that were overcome to implement this initiative.
机译：该货机坪和货舱门是建在圣路易斯，密苏里州和运输通过铁路进行最后的组装在长滩两个主要的C-17的部件，CA.的总制作时间斜坡和门组件的主要部分由手安装的分别为约16000飞机模铸线紧固件和19400个飞机模铸线紧固件，的，在安装到皮肤的子结构。此外，几千紧固件也被安装在坡道和车门的地板部分。一个主要的成本节约机会存在通过自动化这些紧固件的安装，以减少的斜坡和门组件的成本。波音-ST。路易斯收缩维费尔斯特德，德国的Brotje自动化设计和构建的自动钻孔和紧固系统（ADF）的。自动化预计减少构建坡道和门组件所需的时间，以降低成本。此外，自动化有望提高紧固件孔的质量和紧固件安装质量。为开展这个项目的另一个重要原因是，使波音公司，圣。路易加强其作为行业领导者和创新者在航空航天制造业的地位。本文介绍了机械和结构挑战是克服实现这一倡议（有提升和支撑组件相关）。

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