|Project Summary||Project Information|
For a full project description, click on the following link for the Project Readiness Package.
AATech manufactures the GE90 fuel injection nozzle for aircraft. The part in question contains a bent tube-within-a-tube structure, which is the relevant feature to be addressed by this project. This tube assembly is built with both tubes straight, then a manual bend operation introduces the desired angle. Because this bend operation cannot be exactly controlled, the end of the tube assembly is then trimmed to meet length and squareness requirements.
The trimming process is currently performed through a very intensive, manual milling process. When the outer tube is being trimmed, if the tool head contacts the inner tube and marks it, then the entire part must be scrapped. A high level of skill is required for this operation; at present, only two machinists have demonstrated satisfactory performance in meeting the required specifications. In addition, the process represents a significant ergonomic and safety hazard; due to the high precision required of the mill, the operators must bring their faces close to the tool head, placing them at risk of being struck by burrs or moving parts.
The objective of this project is to improve the process by reducing the skill requirement to that of an operator, rather than that of a machinist; to make the process safe and ergonomically sound; to ensure that the process can be sufficiently controlled to produce acceptable product; and to keep the overall cycle time within the current parameters.
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|MSD I & II||MSD I||MSD II|