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      Home News

      Lockheed Martin builts 3D printed giant satellite fuel tank

      Staff Reporter by Staff Reporter
      July 13, 2018
      in News, Satellite/Comms
      ShareTweetPostEmail

      The 46-inch diameter titanium cylinder tank is part of a transformation in the space designing technology as Lockheed Martin shaved off 87 percent of the schedule to build the domes.

      A Lockheed Martin engineer inspects one of the 3D printed dome prototypes, the final dome measures 46 inches in diameter, large enough to fit 74.4 gallons of liquid.

      Lockheed Martin has completed the final rounds of quality testing on a titanium dome of 46-inch diameter built using 3D printing technology, ending a multi-year development program to create giant, high-pressure tanks that carry fuel on board satellites.

      The titanium fuel tank consists of three parts welded together: two 3D printed domes that serve as caps and a variable-length traditionally-manufactured titanium cylinder that forms the body.

      Speaking about the project, Rick Ambrose, Lockheed Martin Space Executive Vice President said: “Our largest 3-D printed parts to date show we’re committed to a future where we produce satellites twice as fast and at half the cost. And we’re pushing forward for even better results. For example, we shaved off 87 percent of the schedule to build the domes, reducing the total delivery timeline from two years to three months.”

      Satellite fuel tanks must be both strong and lightweight to withstand the rigours of launch and decade-long missions in the vacuum of space. That makes titanium an ideal material, but procuring 4-foot-diameter, 4-inch-thick titanium forgings can take a year or more, making them the most challenging and expensive parts of the tank. Traditional manufacturing techniques also meant that more than 80 percent of the material went to waste. Now, 3-D printing eliminates all that lost material for the domes, and the titanium used for printing is readily available with no wait time, the company stated.

      “We self-funded this design and qualification effort as an investment in helping our customers move faster and save costs,” explained Ambrose. “These tanks are part of a total transformation in the way we design and deliver space technology. We’re making great strides in automation, virtual reality design and commonality across our satellite product line. Our customers want greater speed and value without sacrificing capability in orbit, and we’re answering the call.”

      The company stated that even the smallest leak or flaw could be catastrophic for a satellite’s operations, so Lockheed Martin engineers went to great lengths to ensure the printed tanks meet or exceed the performance and reliability required by NASA. Engineers and technicians rigorously evaluated the structure, conducting a full suite of tests to demonstrate high tolerances and repeatability.

      The tank domes are a leap in size for qualified 3-D printed materials. The largest part previously qualified was a toaster-size electronics enclosure for the Advanced Extremely High Frequency (AEHF) satellite program. Lockheed Martin’s recent accomplishment continues a path of 3-D printed parts that bloomed in recent years.

      Since Lockheed Martin launched the first ever printed parts into deep space aboard NASA’s Juno spacecraft, it has produced thousands of flight components and even more for tooling and prototyping using a variety of metals and composites.

      Technicians used Electron Beam Additive Manufacturing (EBAM) technology to produce these domes in the 3-D printer at the company?s facility in Denver. Lockheed Martin now offers the tank as a standard product option for LM 2100 satellite buses.

      Tags: ProductsNASAlockheed martin3d printing

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