On 6 September, 2017 the Additive Manufacturing Maintenance Operations (AMMO) working group conducted a teleconference with over 30 participants. A summary of the teleconference follows:
Large Format Polymer AM Research Projects, Rob Thompson (FRC-E) ably filled in for Doug Greenwood and discussed two projects: the Oak Ridge National Laboratory (ORNL) / Big Area Additive Manufacturing (BAAM) Project, and the THERMWOOD Large Scale Additive Manufacturing (LSAM) Project. In the ORNL / BAAM project, ORNL is working to characterize anisotropic CTE behavior of PPS material and progress has been made on defining CTE / Scale Factors based on material research at UT – Knoxville. On the Thermwood LSAM project, machine expansion is complete, and Thermwood is working to characterize / define CTE behavior of parts printed using the PPS + CF material. Brief will be available on the AMMO website. http://ammo.ncms.org
New NDE Methods for Mechanical Properties Applied to Additive Manufacturing via Cold Spray (from CSAT 2017) – Simon Bellemare (MMT) described 2 new instruments for NDE: In -Field NDE Testing – Hardness , Strength and (HSD) (via frictional sliding), and Laboratory NDE Testing –
Non-Destructive Toughness Testing (NDTT) (via micromachining). Brief will be available on the AMMO website. http://ammo.ncms.org
GSA’s 3D Printing/Additive Manufacturing Initiative – Walter Johnson described the GSA’s AM initiatives, but was unable to get the slides approved for public release prior to the forum. Once approved, they will be posted on the AMMO website https://ammo.ncms.org/ . Until then, you can find out more information by going to the GSA website at https://www.gsa.gov/3dprinting .
Action: Walter to provide the GSA website link to post on the AMMO website.
AMSC Update – Jim McCabe provided an excellent update on the America Makes & ANSI Additive Manufacturing Standardization Collaborative (AMSC), describing AMSC deliverables, roadmap organization, activities, and the upcoming Phase 2 kick-off meeting on Sep 7, 2017 in Philadelphia.
Briefs and minutes for this meeting will be provided on the AMMO website.
NAMI Meeting Update –Col, Howie Marotto provided a very informative summary of the Naval AM Technical Interchange meeting attended by Naval SMEs, industry, agencies, and the other military Services. He stated that the Naval AM implementation plan is to have AM as far forward as possible with every type of material. He described 5 steps which included rapid certification and qualification using a commonality/baseline of what can and cannot be printed, to include a box color concept of qualitative levels, integrated digital data, maker stations afloat and in tractor trailers, common business practices, and expeditionary manufacturing. The minutes from the meeting should be available to the public soon, and we’ll post to the AMMO website. Col Marotto has offered to brief at a future AMMO call.
AM Wargame II Final Report – Ray Langlais (LMI) provided a quick update on the AM Wargame II report. The comments and edits from the AM Wargame Planning Group have been incorporated into the draft, and the draft has been sent back out to the group for review. A teleconference will be scheduled to discuss the conclusion/potential outcomes based on the AM Wargame results, and inserted in the report, prior to final editing and release.
Next Meeting: – The next AMMO WG call is scheduled for 10:30-12:00 am (Eastern Time) on Wednesday, 4 October 2017.
POC this action is Ray Langlais, LMI, firstname.lastname@example.org, (571) 633-8019
Large Format Polymer AM Research Projects: Rob Thompson (FRC-E)
Q1. In reference to the BAAM project, how many times can the composite mold be used?
A1. We have not quantified that yet. We have performed 7 cycles on one, but the maximum has not been determined yet. 5 times would be useful. We do lots of one-off tools. We are actually a “last resort” manufacturer and not interested in high volumes.
Q2. Is COMFRC working collaboratively with other Services on the BAAM initiative?
A2. FRC SE and SW have both shown interest, and we have had discussions on similar projects with the USAF. The USMC will also be reaching out within the year.
Q3. Do you look at dimensional tolerance and/or surface defects?
A3. We scan for dimensional tolerance and look at the surface for defects.
Q4. Can it be used for Certification or Qualification?
A4. It depends on the application. Typically certification and qualification are performed with a visual inspection or tape measure.
New NDE Methods: Simon Bellemare
Q1. What is the industry standard for yield strength precision based on traditional testing?
A1. There are lots of studies that show up to 4%.
GSA’s 3D Printing AM Initiative: Walter Johnson
Comment #1. Slides to be published once they are approved for public release
Comment #2. The web link for more information is: https://www.gsa.gov/3dprinting
AMSC: Jim McCabe
Q1. Have you/industry established a standard TDP for AM files?
A1. No, that is one of the gaps identified. The roadmap does recommend a MILSTD be developed for TDPs.
Naval AM Technical Interchange (NAMI) Meeting Update: – Lt Col Howie Marotto
Q1. Will a summary of the meeting be available in the future?
A1. Yes, the minutes of the meeting should be available soon and will be made public.
AM Business Model Wargame II Final Report Update: – Ray Langlais (LMI)
Date(s) - 09/06/2017
10:30 AM - 12:00 PM