Development of a direct metal freeform fabrication technique using CO2 laser welding and milling technology

Doo Sun Choi, S. H. Lee, B. S. Shin, K. H. Whang, Rafael Song, S. H. Park, H. S. Jee

    Research output: Contribution to journalConference article

    Abstract

    Since the first introduction of rapid prototyping in 1986, several techniques have been developed and successfully commercialized in the market. However, most commercial systems currently use resins or waxes as the raw materials. Thus, the limited mechanical strength for functional testing is regarded as an obstacle towards broader application of rapid prototyping techniques. To overcome this problem, direct metal deposition methods are being investigated worldwide for rapid prototyping and even for rapid tooling applications. As a contribution to this development, a fundamental study on a process combination of wire welding technology using CO2 laser radiation with milling was carried out and is reported in this paper. Laser welding enables accurate deposition of metals and the subsequent milling increases the surface quality and accuracy to machining standard. Compared to powder, the use of wire is of advantage in terms of a simple feeding mechanism as well as a higher deposition rate. The main focus of the experimental investigation is to find the basic process characteristics. For this purpose, basic parts were fabricated as a function of process parameters such as laser power, welding speed and bead distance. The microstructure, hardness and tensile strength are then examined as a function of these process parameters. In conclusion, the advantages and disadvantages of this process are discussed in comparison with other direct metal fabrication techniques.

    Original languageEnglish (US)
    Pages (from-to)273-279
    Number of pages7
    JournalJournal of Materials Processing Technology
    Volume113
    Issue number1-3
    DOIs
    StatePublished - Jun 15 2001
    Event5th Asia Pacific Conference on Materials Processing - Seoul, Korea, Republic of
    Duration: Jun 25 2001Jun 25 2001

    Fingerprint

    Laser beam welding
    Rapid prototyping
    Metals
    Fabrication
    Welding
    Wire
    Milling (machining)
    Waxes
    Laser radiation
    Deposition rates
    Powders
    Strength of materials
    Surface properties
    Raw materials
    Machining
    Tensile strength
    Resins
    Hardness
    Microstructure
    Lasers

    Keywords

    • Laser welding
    • Metal deposition
    • Metal fabrication
    • Mild steel
    • Rapid prototyping and tooling

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Computer Science Applications
    • Metals and Alloys
    • Industrial and Manufacturing Engineering

    Cite this

    Development of a direct metal freeform fabrication technique using CO2 laser welding and milling technology. / Choi, Doo Sun; Lee, S. H.; Shin, B. S.; Whang, K. H.; Song, Rafael; Park, S. H.; Jee, H. S.

    In: Journal of Materials Processing Technology, Vol. 113, No. 1-3, 15.06.2001, p. 273-279.

    Research output: Contribution to journalConference article

    Choi, Doo Sun ; Lee, S. H. ; Shin, B. S. ; Whang, K. H. ; Song, Rafael ; Park, S. H. ; Jee, H. S. / Development of a direct metal freeform fabrication technique using CO2 laser welding and milling technology. In: Journal of Materials Processing Technology. 2001 ; Vol. 113, No. 1-3. pp. 273-279.
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