GKN Aerospace Achieves Significant Savings with Additive Manufactured Tooling and Prototypes.
GKN Aerospace (GKN) is a leading multi-technology tier one aerospace supplier, serving over 90% of the world’s aircraft and engine manufacturers. In the last 30 years, the GKN Aerospace team has also earned a reputation as a leader in additive manufacturing technology for the commercial, military and space markets.
The team at the company’s Filton manufacturing site is responsible for producing and supplying production tools and prototypes to multiple areas of the business. When faced with the need to reduce costly production line downtime, as well as deliver the most fully-functional, ultra-realistic prototypes possible, GKN’s additive manufacturing polymer specialist, Rachel Trimble, turned to 3D printing. Trimble believes the technology is a solution that could meet both objectives as well as prepare GKN for the future.
Reducing Costly Production Downtime With 3D Printed Tools
For GKN, any halt in the production line is a costly disruption. For example, when a traditionally manufactured tool breaks, replacing it results in a long lead time and high cost. Engineers would typically have to wait weeks for a new tool, a downtime they could not afford.
According to Trimble, the benefit of 3D printing removed this burden and improved the responsiveness to the engineers’ manufacturing requirements. In one case, GKN engineers 3D printed small tools to create protective masks used when processing metal parts. Because the masks weren’t commercially available, the backlog of parts needing processing grew. But the ability to quickly print the tools in the correct size to make the masks enabled several parts to be processed at once, alleviating the backlog.
“The…3D Printer offers us the enhanced geometric freedom to create previously unthought-of 3D printed tools, which then enable us to manufacture extremely complex parts that would be uneconomical or just physically impossible to create by any other means.”
— Rachel Trimble, GKN Aerospace
Customized, Optimized, Revolutionized
It’s not just additive manufacturing’s time and cost savings that GKN enjoys. Trimble believes one of its key benefits is the creative freedom it gives users. Previously, GKN engineers were limited by the economic and physical constraints of traditional manufacturing. Now, teams can create tools that were impossible to produce prior to the adoption of additive manufacturing.
This freedom is not just felt in the ability to create designs that were previously impossible, but also in the ability to improve working environments and processes for production line operators. According to Trimble, creating optimized, accurate 3D printed tools without being restricted by size or shape has enabled them to tailor tools to specific jobs and improve the functionality of their operations. In certain cases, GKN’s engineers report a dramatic reduction of 40% in concessions, and some jobs even dropped from two operators to one.
To achieve these goals GKN relies heavily on its Stratasys F900™ 3D Printer. “The F900 offers the largest build size of any FDM® 3D printer, enabling us to quickly produce tools to meet any requirements. We’re already utilizing this technology to design and 3D print previously inconceivable tools, which then enable us to manufacture extremely complex parts that would be uneconomical or just physically impossible by any other means,” said Trimble.
Ultra-Realistic, Fully-Functional Prototypes
Besides tooling, GKN regularly uses its Stratsys F900 for rapid prototyping. One of its most successful cases was the creation of a fully-functional aircraft windscreen housing. The team was on a tight deadline to produce the housing for a product launch event but it was still incomplete just days before the launch. “In a matter of hours, we were able to produce a prototype of this windscreen housing on the F900,” said Trimble. “The prototype produced was so realistic and so accurate that the launch team was not only able to go ahead with the event but the feedback received confirmed that the 3D printed housing was almost indistinguishable from the real thing.”
To the Future
Trimble anticipates a greater move towards the use of FDM additive manufacturing for high-value, flight-critical, end-use composite parts. “By harnessing Stratasys additive manufacturing for tooling and prototyping, we are enjoying both time and cost savings, among other benefits, all while simultaneously preparing ourselves for the future,” said Trimble.
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