
Lockheed Martin CNC Machines 3D Printed Fuel Tank Model into Spec
Learn how 3D printing and CNC machining worked together for this large fuel tank.Learn how 3D printing and CNC machining worked together for this large fuel tank.
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When you have a complex geometry that is ideal for FDM, but the part requires critical dimensions and fine features that can’t be achieved as printed, CNC machining after 3D printing will deliver the part you need.
FDM works with engineering-grade thermoplastics that are used for production applications with high requirements. FDM is an ideal choice for production parts because of the unparalleled design freedom possible with the technology while achieving durability and excellent strength-to-weight ratios. The addition of CNC machining to an FDM part manifests in even more accurate parts in lightweight and robust materials.
Additionally, the combination of the two processes can be quicker than most traditional manufacturing methods. Even accounting for printer set up, build, finishing and machining, the additive + machining method is faster than designing and producing a tool for injection molding. It also allows for greater flexibility to make design improvements.
Jigs & Fixtures
A popular application for this process are jigs and fixtures. We commonly build manufacturing aids with FDM that are light weight, ergonomically enhanced and even custom to users. Depending on the complexity of the jig or fixture, they may require CNC machining to line bore parts for alignment, mill for smooth surfaces or machine complementary metal parts.
Sometimes for our own internal manufacturing purposes, we create holding fixtures for parts that need machining in order to ensure accuracy. We can design fixtures and nesting tools to hold parts for machining with an assortment of processes and materials.
Complementary Parts
Another application is when parts require complementary metal parts or plastic parts in a different material. These assemblies can be achieved mid-build with technologies like FDM by pausing prints and embedding machined metal or plastic parts into the incomplete component.
Learn how 3D printing and CNC machining worked together for this large fuel tank.
Read the Case StudyAdd dimensional accuracy and cosmetic touches to FDM parts with CNC Machining
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