ADDITIVE MANUFACTURING is the magazine devoted to industrial applications of 3D printing and digital layering technology. We cover the promise and the challenges of this technology for making functional tooling and end-use production parts.
Issue link: https://am.epubxp.com/i/700770
additiveconference.com 5 SCHEDULE | TUESDAY, SEPTEMBER 13 additive and subtractive operations performed simultaneously, additive deposition from scratch, or deposition on previously manufactured components. It could also perform additive deposition and laser welding of deposited and/or previously manufactured components, deposition of multiple alloys in the same machine, or even in the same build, deposition of non-reactive and reactive metals in the same machine or build, and subtractive manufacturing in the AM machine with robot-like programmable fixturing for selective support of the build during machining. 9:45 – 10:15 A Comparison of Inert and Open Atmosphere Laser Metal Deposition Systems Jim Cann | Optomec Laser Engineered Net Shaping (LENS) is a laser metal deposition based additive manufacturing process that is growing and gaining acceptance in a variety of commercial applications for both complete component builds and repairs. Quality of the build or repair is always of concern and especially in critical industries such as Aerospace. Some alloys such as Titanium are typically printed in an Argon gas filled chamber. Optomec offers both inert gas (glovebox) and open atmosphere (3D Printing & Cladding) solutions. While it is desirable to accomplish laser metal deposition in an oxygen free environment, it is not practical or cost effective to do so for many applications. An overview of the types of systems for both inert and open atmosphere processing will be presented. This will include the methods used to create very low (less than 10 ppm oxygen) levels for LENS technology and the ease-of-use tradeoffs to utilize LENS in a production environment. Both hybrid CNC and additive-only open atmosphere systems will be presented and reviewed. Various metal alloys built in both environments will be analyzed to compare metallurgical results such as porosity, inclusions, surface finish, and overall quality of the build. A comparison will be made to show when an inert atmosphere is required and when an open atmosphere environment is acceptable. Issues will include metallurgical quality, build speed, ease of use and access, as well as common application examples. 10:30 – 11:00 Integration of Additive Manufacturing with Traditional Machining Benjamin Fisk | Methods 3D Inc. Additive manufacturing grants users the freedom to design and create optimized parts with added benefits that traditional manufacturing alone struggles to provide. This revolutionary technology removes many of the design constraints and compromises imposed by traditional manufacturing, but oftentimes creates new challenges for post-processing of AM parts prior to delivering an end-use product. Methods 3D is implementing design strategies to combat these challenges by actively practicing Design for Additive Manufacturing (DFAM) techniques. By combining the best capabilities of both additive and traditional manufacturing, many of these challenges such as powder removal, fixturing and tool holding, surface finishing, and finish machining can be alleviated. During concept development, cavities and passageways are incorporated to allow for un- melted powder removal during post-processing. Support structures are tailored to double as transfer fixtures for secondary machining operation such as a 5-axis CNC or lathes. Part orientation and build parameter optimization are modified to deliver optimal surface finish on key critical surfaces.