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Wire-based laser metal deposition (LMD-W) for additive manufacturing influences of the wire feed

Poster presented at 10th International Laser Symposium & International Symposium »Tailored Joining«, February 27 - 28, 2018, International Congress Center Dresden
Wire-based laser metal deposition for Additive Manufacturing - Influences of the wire feed and development of a prediction model to forecast wire behaviour for better part quality
: Klingbeil, Nils

Poster urn:nbn:de:0011-n-4944119 (221 KByte PDF)
MD5 Fingerprint: 7e961d45ee4d8f5b779cab6ada17fcdc
Erstellt am: 29.5.2018

2018, 1 Folie
International Laser Symposium <10, 2018, Dresden>
International Symposium "Tailored Joining" <2018, Dresden>
Poster, Elektronische Publikation
Fraunhofer IPT ()
Fertigungstechnik; Werkzeug- und Formenbau; additive manufacturing; LMD; wire-based; Laserauftragschweißen

Additive Manufacturing (AM) technologies are in great demand. AM is no longer limited to produce only prototypes, but becomes a new established production technology. Companies are excited to switch from small to large quantities of individual parts as well as to produce AM parts in large-scale [1]. For these requirements, the Fraunhofer Institute for Production Technology IPT has developed since years a wire-based Laser Metal Deposition (LMD-W) process. Main advantages associated with the LMD-W process are the high material efficiency in deposition, the prevention of machine room from contamination, the manufacturing of parts with high surface quality, and scalability for large parts due to local shielding [2]. However, LMD-W requires a high process stability and accuracy of positioning the wire relative to the laser spot as well as to the melt pool. The wire feed, one of the main influencing process factors for LMD-W, has an impact on these requirements in different ways. As a result, the Fraunhofer IPT investigated the wire feed to tackle the challenge for a optimal wire feed realization in machine tools and robot-based systems. To optimize the wire feed, the Fraunhofer IPT has also analyzed the conveying path of the wire to minimize the impact on the process zone and to stabilize the process for better welding quality. Influences due to wire bending or friction resistance lead to irregularities or process interruptions. Fraunhofer IPT creates therefor a prediction model for forecast the wire bending behavior, which helps to construct a suitable conveying path without plastic deformation of the wire. As a conclusion, these improvements ensure for higher process stability and accuracy of positioning the wire and subsequently for better part quality.