近畿大学次世代基盤技術研究所報告 Vol. 9（2018）55－59‫ڦ࣮ࣗࣅࣞڦ‬Additive Manufacturingᢏ⾡ࡢ᭱᪂ືྥிᴟ ⚽ᶞ*1㸪ụᗉྖ ᩄᏕ*2㸪⡿ཎ ∾Ꮚ*3

The Recent Trend on Additive Manufacturing Technology: A Review

Hideki KYOGOKU*1, Toshi-Taka IKESHOJI , Makiko YONEHARA The recent trend on Additive Manufacturing technology is reviewed. Additivemanufacturing (AM) technology has been dramatically attracting attention as a breakthroughtechnology in advanced manufacturing. The recent trend of the development of metal 3D
printers and the recent research activities are introduced. Recently, new-type metal 3D printers
are developed using not only powder bed fusion and directed energy deposition but also binder
jetting and materials extrusion. And also the current state of the research development in thenational (TRAFAM) project and the activities in the Advanced Additive Manufacturing Centerare introduced.
Keywords: Additive Manufacturing, 3D Printer, Powder Bed Fusion, Directed Energy Deposition,
Binder Jetting, Materials Extrusion, TRAFAM Project㸬ࡣࡌࡵ࡟  ࢔ࢹ࢕ࢸ࢕ࣈ࣭࣐ࢽࣗࣇ࢓ࢡࢳࣕࣜࣥࢢ㸦AdditiveManufacturing㸪௨ୗ AM ࡜グ㏙ࡍࡿ㸧ᢏ⾡࡟࠾ࡅࡿ㸪ࡇࡇᩘᖺࡢ㐍ᒎࡣ┠ぬࡲࡋ࠸ࡶࡢࡀ࠶ࡿ㸬࡜ࡾࢃࡅ㸪㔠ᒓ AM ᢏ⾡ࡣ㸪⿦⨨㸪㔠ᒓ⢊ᮎࡉࡽ࡟ࡣࢯࣇࢺ࢙࢘࢔ࡢᛶ⬟ྥୖ࡟ࡼࡾ⯟✵Ᏹᐂศ㔝࡟࠾࠸࡚ࡣᚲ㡲ࡢຍᕤᢏ⾡࡜࡞ࡗ࡚ࡁ࡚࠸ࡿ㸬ࡇࡢศ㔝࡟࠾࠸࡚ࡣ㸪GE ♫ࡀ≌ᘬᙺࢆົࡵ࡚࠾ࡾ㸪2010 ᖺࡼࡾ AM ᢏ⾡ࡢᑟධࢆ᳨ウࡋጞࡵ㸪᭱㏆࡛ࡣ⯟✵ᶵ࢚ࣥࢪࣥ㒊ရ➼࡬㐺⏝ࢆጞࡵ࡚࠸ࡿ㸬ࡇࡢࡼ࠺࡞ࣉࣟࢭࢫࡢ୰࡛㸪2016 ᖺ࡟ࡣ၏୍ࡢ㟁Ꮚࣅ࣮࣒ࣃ࢘ࢲ࣮࣋ࢵࢻ᪉ᘧࡢ⿦⨨࣓࣮࣮࡛࢝࠶ࡿ ARCAM ♫࡜ୡ⏺➨ 2 ఩ࡢ࣮ࣞࢨࣃ࢘ࢲ࣮࣋ࢵࢻ᪉ᘧࡢ ConceptLaser ♫ࢆചୗ࡟཰ࡵ㸪2017 ᖺ࡟ࡣ Formnext 2017࡟࠾࠸࡚ୡ⏺᭱኱⣭ࡢ㐀ᙧࢧ࢖ࢬ1m1m ࡢșᶵࢆᒎ♧ࡍࡿ࡞࡝㸪⿦⨨㛤Ⓨ࡟ࡶ✚ᴟⓗ࡟ྲྀࡾ⤌ࢇ࡛࠸ࡿ㸬ࡑࡢ࡯࠿㸪࣑ࢩࣗࣛࣥ♫ࡢ࣋ࣥࢳ࣮ࣕ௻ᴗ࡛࠶ࡿ AddUp ♫ࡀ᪂ࡓ࡟࣮ࣞࢨࣃ࢘ࢲ࣮࣋ࢵࢻ᪉ᘧࡢ⿦⨨ࢆ㛤Ⓨࡍࡿ࡞࡝㸪ࡇࡢศ㔝࡟࠾ࡅࡿືࡁࡣ┠ぬࡲࡋ࠸ࡶࡢࡀ࠶ࡿ㸬ࣃ࢘ࢲ࣮࣋ࢵࢻ᪉ᘧࡢ⿦⨨࡜ేࡏ࡚㸪ࢹ࣏ࢪࢩࣙࣥ᪉ᘧࡢ⿦⨨࡟㛵ࡋ࡚ࡣ㸪Ḣ⡿ࡸ୰ᅜ࡛ࡣ࠿࡞ࡾᑟධࡀ㐍ࢇ࡛࠸ࡿ㸬ࡲࡓ㸪2016 ᖺ࠶ࡓࡾ࠿ࡽࣂ࢖ࣥࢲࢪ࢙ࢸ࢕ࣥࢢ᪉ᘧࡢ⿦⨨㛤Ⓨࡶ㐍ࡵࡽࢀ࡚࠾ࡾ㸪ExOne ♫㸪࣊࢞ࢿࢫ♫ࡀ✚ᴟⓗ࡟ື࠸࡚࠸ࡿ㸬
RICOH ♫ࡶࣂ࢖ࣥࢲࢪ࢙ࢸ࢕ࣥࢢ

᪉ᘧࡢ⿦⨨㛤Ⓨࡢ◊✲ࢆ㐍ࡵ࡚࠸ࡿ㸬ࡉࡽ࡟㸪2017 ᖺࡼࡾ Markforged ♫ࡀ㔠ᒓ⢊ᮎࢆᶞ⬡ࣇ࢕࣓ࣛࣥࢺ࡟ΰྜࡋ࡚㐀ᙧࡍࡿᮦᩱᢲฟࡋ᪉ᘧࡢ⿦⨨㛤Ⓨࢆ⾜ࡗ࡚࠸ࡿ㸬ࡇࡢࡼ࠺࡟㸪ࡇࢀࡲ࡛୺ὶ࡛࠶ࡗࡓࣃ࢘ࢲ࣮࣋ࢵࢻ᪉ᘧ࡜ࢹ࣏ࢪࢩࣙࣥ᪉ᘧࡔࡅ࡛࡞ࡃ㸪ࣂ࢖ࣥࢲࢪ࢙ࢸ࢕ࣥࢢ᪉ᘧࡸᮦᩱᢲฟࡋ᪉ᘧ࡞࡝〇ရ࡟ᛂࡌࡓ㐀ᙧ᪉ᘧࡢ⿦⨨㛤ⓎࡀάⓎ໬ࡋ࡚ࡁ࡚࠸ࡿ㸬2017 ᖺ 10 ᭶ࡢ EuroPM2017 ࡛ࡢ఍㛗ࡢᣵᣜ࡛ࡣ㸪2016 ᖺ࡟᪂つᑟධࡉࢀࡓ㔠ᒓ 3D ࣉࣜࣥࢱࡣ 1000 ྎ⛬ᗘ㸪✌ാ⿦⨨ࡣ 3500 ྎ⛬ᗘ࡛࠶ࡿ࡜ண ࡉࢀࡿ࡜ࡢࡇ࡜࡛࠶ࡗࡓ㸬ࡇࢀ࡟కࡗ࡚㸪AM 㛵㐃ࡢ⢊ᮎ⏕⏘㔞ࡣ㸪2015
ᖺ࡟ 700 ࢺ࡛ࣥ࠶ࡗࡓࡶࡢࡀ㸪2023 ᖺ࡟ࡣ 4700 ࢺࣥ࡟ఙࡧࡿ࡜ࡢண ࡀ♧ࡉࢀࡓ㸬ࡲࡓ㸪ࣉࣞࢼ࣮ࣜㅮ₇࡛ࡣ㸪࢖ࢱࣜ࢔ࡢ࢞ࢫࢱ࣮ࣅ࣓࣮࣮࡛ࣥ࢝࠶ࡿGE Baker
Huges ♫ࡢ࠿ࡽࡢሗ࿌ࡀ࠶ࡾ㸪HIP ࡜ࣂ࢖ࣥࢲࢪ࢙ࢸ࢕
ࣥࢢ(BJ)㸪࣮ࣞࢨࣃ࢘ࢲ࣮࣋ࢵࢻ(L-PBF)᪉ᘧ㸪㟁Ꮚࣅ࣮࣒ࣃ࢘ࢲ࣮࣋ࢵࢻ(E-PBF)᪉ᘧ(EBM)㸪ࢹ࣏ࢪࢩࣙࣥᢏ⾡ࢆ⤌ࡳྜࢃࡏࡓ㛤Ⓨࢆ⾜ࡗ࡚࠾ࡾ㸪2025 ᖺࡲ࡛࡟࢖ࣥࢥࢿࣝྜ㔠ࢆ୰ᚰ࡜ࡋࡓ㐀ᙧ࡟ L-PBF ⿦⨨ࢆ 50 ྎ㸪ࢫࢸࣥࣞࢫ㗰࡜ࢭ࣑ࣛࢵࢡࢫࢆ୰ᚰ࡜ࡋࡓ㐀ᙧ࡟ BJ ⿦⨨ࢆ 30 ྎᑟධணᐃ࡛࠶ࡿ࡜ࡢሗ࿌ࡀ࡞ࡉࢀࡓ㸬ࡇࡢࡼ࠺࡞୰㸪ᡃࡀᅜ࡟࠾࠸࡚ࡶ㸪2017 ᖺ࡟ࡣ኱ᡭ௻ᴗࢆ୰ᚰ࡟࠿࡞ࡾࡢྎᩘࡢ㔠ᒓ 3D ࣉࣜࣥࢱࡢᑟධࡀ⾜ཎ✏ཷ௜ 2018 ᖺ 5 ᭶ 1 ᪥*1 ㏆␥኱ᏛᕤᏛ㒊 ࣟ࣎ࢸ࢕ࢡࢫᏛ⛉ ᩍᤵ㸪ḟୡ௦ᇶ┙ᢏ⾡◊✲ᡤ ᩍᤵ㸦ࠛ739-2116 ᮾᗈᓥᕷ㧗ᒇ࠺ࡵࡢ㎶ 1 ␒㸧E-mail kyogoku@hiro.kindai.ac.jp*2 ㏆␥኱Ꮫḟୡ௦ᇶ┙ᢏ⾡◊✲ᡤ෸ᩍᤵ
*3 ㏆␥኱Ꮫḟୡ௦ᇶ┙ᢏ⾡◊✲ᡤ◊✲ဨ㐃⤡ඛ㸸ிᴟ⚽ᶞ㸦◊✲௦⾲⪅㸧

－ 55 －ࢃࢀ࡚࠸ࡿ࡜ண ࡉࢀࡿ㸬୍᪉㸪Ꮫ༠఍࡟࠾ࡅࡿ◊✲Ⓨ⾲ࡶάⓎ࡟⾜ࢃࢀ࡚࠾ࡾ㸪ࡇࡇᩘᖺࡢ㛫࡟Ⓨ⾲௳ᩘࡀ኱ᖜ࡟ఙࡧ࡚ࡁ࡚࠸ࡿ㸬AM࡟㛵ࡍࡿᅜ㝿఍㆟࡜ࡋ࡚ࡣ᭱ࡶྂࡃ࠿ࡽࢸ࢟ࢧࢫ኱Ꮫ࣮࢜ࢫࢸ࢕ࣥᰯ࡛㛤ദࡉࢀ࡚࠸ࡿ SFF ࢩ࣏ࣥࢪ࣒࢘ 2017࡟࠾࠸࡚ࡣ㸪⣙ 500 ௳ࡢⓎ⾲ࡀ⾜ࢃࢀ㸪ࡇࡢศ㔝࡟࠾ࡅࡿ◊✲ࡢάᛶᗘࡀ㠀ᖖ࡟㧗࠸ࡇ࡜ࡀఛ࠼ࡿ㸬Ḣ⡿ࡸ୰ᅜ࡞࡝࡟࠾ࡅࡿ௚ࡢᅜ㝿఍㆟࡟࠾࠸࡚ࡶⓎ⾲௳ᩘࡣ኱ᖜ࡟ቑ࠼࡚ࡁ࡚࠾ࡾ㸪ㄽᩥᩘࡶᛴ⃭࡟ቑຍࡋ࡚ࡁ࡚࠸ࡿ㸬ࡇࢀࡣ㸪 ᾏእ࡟࠾࠸࡚ࡣ㸪America Makes ࡢࣉࣟࢪ࢙ࢡࢺ㸪EU ࡢࣉࣟࢪ࢙ࢡࢺࢆࡣࡌࡵ㸪ከࡃࡢࣉࣟࢪ࢙ࢡࢺࡀື࠸࡚࠾ࡾ㸪╔ࠎ࡜ᡂᯝࡀฟጞࡵ࡚࠸ࡿ࡜࡜ࡶ࡟㸪኱Ꮫࡸ◊✲ᶵ㛵ࡢᣐⅬ໬ࡀ㐍ࢇ࡛ࡁ࡚࠸ࡿࡇ࡜࡟㉳ᅉࡋ࡚࠸ࡿ㸬ᡃࡀᅜ࡟࠾࠸࡚ࡶ㸪2014 ᖺᗘࡼࡾ㸪ᢏ⾡◊✲⤌ྜḟୡ௦ 3D ✚ᒙ㐀ᙧᢏ⾡⥲ྜ㛤Ⓨᶵᵓ㸦௨ᚋ㸪TRAFAM
࡜グࡍ㸧ࢆタ⨨ࡋ࡚㛤ጞࡉࢀࡓ⤒῭⏘ᴗ┬ࠕ୕ḟඖ㐀ᙧᢏ⾡ࢆ᰾࡜ࡋࡓࡶࡢ࡙ࡃࡾ㠉࿨ࣉࣟࢢ࣒ࣛ㸫ḟୡ௦⏘ᴗ
⏝ 3D ࣉࣜࣥࢱᢏ⾡㛤Ⓨ㸫ࠖ(2),(3)࡜ෆ㛶ᗓ࡟ࡼࡿᗓ┬㐃ᦠࡢ SIP ࣉࣟࢢ࣒ࣛ 24 ࢸ࣮࣐ࡀᐇ᪋ࡉࢀ㸪ᡂᯝࡀฟጞࡵ࡚࠸ࡿࡀ㸪Ḣ⡿ࡸ୰ᅜ࡟ẚ࡭࡚ᅽಽⓗ࡟◊✲⪅ࡀᑡ࡞࠸ࡇ࡜࠿ࡽ㸪Ꮫ఍࡟࠾ࡅࡿ◊✲Ⓨ⾲௳ᩘࡸㄽᩥᩘࡶᑡ࡞࠸ࡢࡀ⌧≧࡛࠶ࡿ㸬ᮏ✏࡛ࡣ㸪2017 ᖺ࡟࠾ࡅࡿ࣮ࣞࢨ࣮ࢆ⏝࠸ࡓ᭱㏆ࡢAM ᢏ⾡ࡢືྥࢆ୰ᚰ࡟㏙࡭ࡿ࡜࡜ࡶ࡟㸪ᅜᐙࣉࣟࢪ࢙ࢡࢺ࡞࡝ࢆᐇ᪋ࡋ࡚࠸ࡿᙜ◊✲ᡤ࣭3D 㐀ᙧᢏ⾡◊✲ࢭࣥࢱ࣮ࡢ◊✲㛤Ⓨ≧ἣ࡟ࡘ࠸࡚ࡶ⤂௓ࡍࡿ㸬㸬䠝䠩ᢏ⾡ࡢ᭱᪂ືྥࡇࡇ࡛ࡣ㸪2017 ᖺࢆ୰ᚰ࡟㔠ᒓ 3D ࣉࣜࣥࢱ㛤Ⓨࡢ≧ἣ࡟ࡘ࠸࡚㏙࡭ࡿ㸬㔠ᒓ 3D ࣉࣜࣥࢱ࡟฼⏝ࡉࢀ࡚࠸ࡿ
㐀ᙧ᪉ᘧࡣ㸪ୖ㏙ࡋࡓࡼ࠺࡟୺࡜ࡋ࡚(1)⢊ᮎᗋ⁐⼥㸦Powder Bed Fusion㸹௨ᚋ㸪ࣃ࢘ࢲ࣮࣋ࢵࢻ࡜グࡍ㸬㸧᪉ᘧ࡜(2)ᣦྥᛶ࢚ࢿࣝࢠ࣮ሁ✚㸦Directed Energy
Deposition㸹௨ᚋ㸪ࢹ࣏ࢪࢩࣙࣥ࡜グࡍ㸬㸧᪉ᘧ࡛࠶ࡿࡀ㸪᭱㏆࡛ࡣࣂ࢖ࣥࢲࢪ࢙ࢵࢸ࢕ࣥࢢ᪉ᘧ㸪ᮦᩱᢲฟࡋ᪉ᘧࡸ࣐ࢸࣜ࢔ࣝࢪ࢙ࢵࢸ࢕ࣥࢢ᪉ᘧࡢ⿦⨨㛤Ⓨࡶ⾜ࢃࢀጞࡵ࡚࠸ࡿ㸬௨ୗ࡟㸪᭱㏆ࡢືྥ࡟ࡘ࠸࡚⤂௓ࡍࡿ㸬(1)ࣃ࢘ࢲ࣮࣋ࢵࢻ(PBF)᪉ᘧ
ࣃ࢘ࢲ࣮࣋ࢵࢻ᪉ᘧ࡟࠾ࡅࡿග※࡟ࡣ㸪࣮ࣞࢨ࣮࡜㟁Ꮚࣅ࣮࣒ࡀ࠶ࡿࡀ㸪㟁Ꮚࣅ࣮࣒࡟ࡘ࠸࡚ࡣ ARCAM ♫ࡀ⊂༨≧ែ࡛㸪GE ♫ࡢ㈙཰࡟ࡼࡾ኱ᆺ໬࡟ྥࡅ࡚ࡢ᪂ࡓ
࡞ືࡁࡀฟ࡚ࡁ࡚࠸ࡿ㸬୍᪉㸪࣮ࣞࢨ࣮฼⏝ࡋࡓ⿦⨨㛤Ⓨࡢࢺࣞࣥࢻࡣ㸪ḟࡢ㏻ࡾ㸪
ձ 1 kW ࡢ㧗ฟຊࡢࣇ࢓࢖ࣂ࣮࣮ࣞࢨ࣮ࢆᦚ㍕ࡍࡿ࡞࡝㸪࣮ࣞࢨ࣮ࡢ㧗ฟຊ໬
ղ 2 ྎ࠶ࡿ࠸ࡣ 4 ྎࡢࣇ࢓࢖ࣂ࣮࣮ࣞࢨ࣮ࢆᦚ㍕ࡍࡿ࡞࡝ከ㔜ග※໬ࡀ㐍ࡵࡽࢀ࡚࠸ࡿ㸬኱ᆺ໬࡟ࡘ࠸
࡚ࡣ㸪2016 ᖺ࡟ࡣ㸪ճ 250250mm࠿ࡽ500500mm௨ୖ࡬ࡢ㐀ᙧ࢚ࣜ࢔ࡢ኱ᆺ໬࡛࠶ࡗࡓࡀ㸪2017ᖺ࡟ࡣGE♫࡟ࡼࡿ10001000mmࡢ㐀ᙧ࢚ࣜ࢔㸪SLM Solutions♫࡟ࡼࡿSLM800ࡢ㛤Ⓨ࡞࡝㸪ࡉࡽ࡟኱ᆺ໬ࡀ㐍ࢇ࡛࠸ࡿ㸬 ୍᪉㸪ᑠᆺ⢭ᐦ㐀ᙧ࡬ࡢᒎ㛤ࡶ㐍ࢇ࡛࠾ࡾ㸪ᚑ᮶࠿ࡽ
3D Systems ♫ࡢ⿦⨨ࡸ᪂ࡓ࡟AddUp ♫ࡢ⿦⨨࡞࡝ࡀࡇࢀ࡟࠶ࡓࡿ㸬 AddUp ♫ࡢ⿦⨨࡛ࡣ㸪⢊ᮎ✚ᒙ࡟ࡣ࣮࣮ࣟࣛ᪉ᘧࢆ᥇⏝ࡋ࡚࠾ࡾ㸪⢊ᮎࡣ 6㹼8 μm ࡢ⢏ᚄࡢࡶࡢࢆ౑⏝ࡋ࡚࠸ࡿࡓࡵ㸪ᅗ 1 ࡟♧ࡍࡼ࠺࡟㸪⢭ᐦ࠿ࡘⷧ⫗㒊ရࠊᚤ⣽࡞㈏㏻✰ࡢ㐀ᙧࡶྍ⬟࡜ࡋ࡚࠸ࡿ㸬ࡇࡢࡓࡵ㸪⮬ື㌴⢭ᐦ㒊ရ࡬ࡢ㐺⏝ࢆ᳨ウࡋ࡚࠸ࡿ㸬ᅗ 1 ⢭ᐦ㒊ရࡢ౛㸦AddUp ♫ࡢዲព࡟ࡼࡿ
㸸3D Printing2018 ᒎ♧఍࡟࡚㸧(2)ࢹ࣏ࢪࢩࣙࣥ(DED)᪉ᘧ
ࢹ࣏ࢪࢩࣙࣥ᪉ᘧࡣ㸪༢⣧ᙧ≧࡛኱ᆺ〇ရࡢ〇㐀ࡀྍ⬟㸪」ᒙ〇ရࡢ〇㐀ࡀྍ⬟࡞࡝ࡢ࣓ࣜࢵࢺࢆ᭷ࡋ࡚࠸ࡿ㸬ᡃࡀᅜ࡟࠾࠸࡚ࡶ㸪ᾏእ〇ࡢࢹ࣏ࢪࢩࣙࣥ᪉ᘧࡢ⿦⨨ࡢᑟධࡀྍ⬟࡜࡞ࡾ㸪Optomec ♫ࡢ࣮ࣞࢨ࣮࡟ࡼࡿࣃ࢘ࢲ
࣮ࢹ࣏ࢪࢩࣙࣥ᪉ᘧࡸ Sciaky ♫ࡢ㟁Ꮚࣅ࣮࣒࡟ࡼࡿ࣡࢖࣮ࣖ౪⤥᪉ᘧ࡞࡝ࡀὀ┠ࡉࢀࡿ㸬ࡲࡓ㸪2017 ᖺ⛅࡟
TRAFAM ࡟ࡼࡿ㛤Ⓨ⿦⨨ࡶ㸪ᮾⰪᶵᲔ୪ࡧ࡟୕⳻㔜ᕤᕤసᶵᲔ࡟ࡼࡾୖᕷࡉࢀ㸪㧗㏿࡛㧗⢭ᗘࡢ㐀ᙧయࡢస〇ࡀྍ⬟࡜࡞ࡗ࡚ࡁ࡚࠾ࡾ㸪௒ᚋࡉࡽ࡟㛤Ⓨࡀ㐍ࢇ࡛࠸ࡃࡶࡢ࡜ண ࡉࢀࡿ㸬(3)ࣂ࢖ࣥࢲࢪ࢙ࢸ࢕ࣥࢢ(BJ)᪉ᘧ
ࣂ࢖ࣥࢲࢪ࢙ࢸ࢕ࣥࢢ᪉ᘧࡢ⿦⨨㛤Ⓨࡶ ExOne ♫ࡸ(1)࣊࢞ࢿࢫ♫࡟ࡼࡾ⾜ࢃࢀ࡚࠸ࡿ㸬ᡃࡀᅜ࡛ࡣ㸪RICOH♫ࡶ◊✲㛤Ⓨࢆ㐍ࡵ࡚࠸ࡿ㸬ࡇࡢ᪉ἲࡣ㸪ExOne ♫ࡢሗ࿌࡟ࡼࡿ࡜ᐦᗘࡣࢫࢸࣥࣞࢫ㗰࡛┦ᑐᐦᗘ98㸣⛬ᗘࡲ࡛࡛㸪㔠ᒓ⢊ᮎᑕฟᡂᙧ(MIM)ἲ࡜ྠ⛬ᗘࡢࡶࡢࡀᚓࡽࢀ
࡚࠸ࡿࡀ㸪ᮦ㉁࡟ࡣไ㝈ࡉࢀࡿࡶࡢ࡜ᛮࢃࢀࡿ㸬ࡋ࠿ࡋ㸪
MIM ἲࡼࡾ኱ᆺ࠿ࡘ」㞧ᙧ≧ࡢ〇ရࡢ㐀ᙧࡀྍ⬟࡛㸪኱㔞⏕⏘ࡶྍ⬟࡛࠶ࡿࡓࡵ㸪ᮦ㉁࡜ᙧ≧ࢆ⤠ࢀࡤ௒ᚋࡢᒎ

－ 56 －㛤ࡀᮇᚅ࡛ࡁࡿ㸬(4)ᮦᩱᢲฟࡋ᪉ᘧ
 Markforged ♫ࡀ㛤Ⓨࡋࡓᮦᩱᢲฟࡋ᪉ᘧࢆ฼⏝ࡋࡓ⿦⨨࡛㸪MIM ࡜ྠᵝ࡟⬺ࣂ࢖ࣥࢲᚋ࡟↝⤖ࢆ⾜࠺᪉ᘧ࡛㸪ADAM(Atomic Diffusion Additive Manufacturing)࡜࠸
࠺ྡ⛠ࡢ㐀ᙧἲ࡛࠶ࡿ㸬MIM ࡛ࡣ࡛ࡁ࡞࠸ෆ㒊」㞧ᵓ㐀ࡶ࠶ࡿ⛬ᗘྍ⬟࡛㸪ᅗ 2 ࡟♧ࡍࡼ࠺࡟ MIM ࡼࡾ኱≀ࡢ〇ရ㐀ᙧࡀྍ⬟࡛࠶ࡿࡀ㸪MIM ࡜ྠᵝ࡟ᐦᗘࡣ 97㸣⛬ᗘ࡛࠶ࡿࠋ

ᅗ 2 ADAM ἲ࡟ࡼࡿ㐀ᙧရࡢ౛㸦Markforged ♫ࡢዲព࡟ࡼࡿ㸸3D Printing2018 ᒎ♧఍࡟࡚㸧㸬◊✲㛤Ⓨ≧ἣ ◊✲㛤Ⓨࡢࢺࣞࣥࢻ࡟ࡘ࠸࡚㸪SFF ࢩ࣏ࣥࢪ࣒࢘ 2017
ࡢ◊✲Ⓨ⾲(4)࠿ࡽぢࡿ࡜㸪ḟࡢࡼ࠺࡞Ⅼࡀᣲࡆࡽࢀࡿ㸬(1)ရ㉁ಖドࡢࡓࡵࡢࣔࢽࢱࣜࣥࢢᢏ⾡ࡢ㛤Ⓨ࣭ࢸࢫࢺ࣋ࣥࢳࢆ฼⏝ࡋࡓ in-situ ࣔࢽࢱࣜࣥࢢᢏ⾡ࡢ㐍Ṍࠊ≉࡟⏬ീฎ⌮ᢏ⾡ࡢྥୖ
࣭SLM ཬࡧ DED ⿦⨨ࢆ฼⏝ࡋࡓ ex-situ ࣔࢽࢱࣜࣥࢢᢏ⾡ࡢ㛤Ⓨ(2)㧗ᐦᗘ໬ࡢࡓࡵࡢ L-PBF ཬࡧ DED ࡟࠾ࡅࡿࢫ࢟ࣕࣥ᪉ἲࡢ᳨ウࡸࣔࢹࣜࣥࢢ࡜࠸ࡗࡓᇶ♏ⓗ◊✲(3)㧗ᶵ⬟໬ࡢࡓࡵࡢ L-PBF ࣐ࣝࢳ࣐ࢸࣜ࢔ࣝ⿦⨨ࡢ㛤Ⓨ(4)㧗ᶵ⬟໬ࡢࡓࡵࡢ AM ᢏ⾡࡜ษ๐ᢏ⾡ࢆ⼥ྜࡋࡓࣁ࢖ࣈࣜࢵࢻ⿦⨨ࡢ◊✲㛤Ⓨ(5)ᐇ⏝໬࡟ྥࡅ࡚ࡢᮦᩱ≉ᛶホ౯࣭࢖ࣥࢥࢿࣝ㸪ࢳࢱࣥྜ㔠㸪࢔࣑ࣝࢽ࣒࢘ྜ㔠㸪ࢫࢸࣥࣞࢫ㗰࡞࡝ࡢ⑂ປᙉᗘࡸ◚ቯ㠌ᛶホ౯(6)ᮦᩱ㛤Ⓨ࣭࢔࣑ࣝࢽ࣒࢘ྜ㔠࡟࠾ࡅࡿ㧗ᙉᗘྜ㔠(A2024㸪
A6061㸪A7075)ࡢ㛤Ⓨ࣭ᙧ≧グ᠈ྜ㔠ࠊࢱࣥࢢࢫࢸࣥ࡜࠸ࡗࡓᶵ⬟ᮦᩱ㛤Ⓨࡇࢀࡽࡢ◊✲Ⓨ⾲ࡢ࠺ࡕ⯆࿡῝࠸ෆᐜࢆ⤂௓ࡋ࡚࠾ࡃ㸬(1)ရ㉁ಖドࡢࡓࡵࡢࣔࢽࢱࣜࣥࢢᢏ⾡ࡢ㛤Ⓨ࡟㛵ࡋ࡚ࡣ㸪ከࡃࡢⓎ⾲ࡀ⾜ࢃࢀ࡚࠸ࡿ㸬࣌ࣥࢩࣝ࣋ࢽ࢔ᕞ❧኱Ꮫ࠿ࡽࡣ㸪DED ࡟࠾ࡅࡿ࣓ࣝࢺࣉ࣮ࣝࡢᙧ≧ࢆᣦᶆ࡜ࡋࡓࣔࢽࢱࣜࣥࢢ࣭ࣇ࢕࣮ࢻࣂࢵࢡไᚚ࡟㛵ࡍࡿሗ࿌ࡀ࡞ࡉࢀࡓ㸬࣓ࣝࢺࣉ࣮ࣝ࠿ࡽⓎ⏕ࡍࡿࣉ࣮࣒ࣝࡢ᳨ฟ࡟ࡼࡿไᚚࡀ㔜せ࡛࠶ࡿࡇ࡜ࡀᙉㄪࡉࢀࡓ㸬࣑ࢩ࢞ࣥ኱Ꮫࡢࢢ࣮ࣝࣉ࠿ࡽࡣ㸪L-PBF ࡟࠾ࡅࡿࢫࣃࢵࢱࡢⓎ⏕ࡣ〇ရࡢḞ㝗࡟ࡘ࡞ࡀࡿࡇ࡜࠿ࡽ㸪✀ࠎࡢ㐀ᙧࣃ࣓࣮ࣛࢱ࡜ࢫࣃࢵࢱࡢ㛵ಀࢆ㧗㏿ᗘ࣓࢝ࣛࡢࢹ࣮ࢱ࠿ࡽゎᯒࡋ㸪ࡑࡢⓎ⏕ࡢཎᅉࢆ✲᫂ࡋࡓሗ࿌ࡀ࡞ࡉࢀࡓ㸬࣊ࣜ࢜ࢵࢺ㸫࣡ࢵࢺ኱Ꮫࡢࢢ࣮ࣝࣉ࠿ࡽࡣ㸪㧗㏿ᗘ࣓࢝ࣛࡢほᐹ࡟ࡼࡾ㸪50W࣭0.1m/s ࡛ࢫࣃࢵࢱࡀ๓᪉ྥ࡟㸪
100W࣭0.5m/s ࡛ୖ᪉ྥ࡟㸪200W࣭1m/s ࡛ᚋࢁ᪉ྥ࡟㣕ࡪࡇ࡜ࡀほᐹࡉࢀ㸪㏿ᗘ࡟ࡼࡾࢫࣃࢵࢱࡢ᪉ྥࡀኚࢃࡿࡇ࡜㸪ࡲࡓ㧗ฟຊ࡟࡞ࡿ࡯࡝ࣄ࣮࣒ࣗࡢ㧗ࡉࡀ㧗ࡃ࡞ࡿࡇ࡜ࡶሗ࿌ࡉࢀࡓ㸬ࡇࡢࡼ࠺࡟㸪ࢫࣃࢵࢱࡣ〇ရࡢḞ㝗Ⓨ⏕ࡢཎᅉࡢ୍ࡘ࡛࠶ࡾ㸪ࡇࡢࡼ࠺࡞▱ぢࡣ㐀ᙧ᮲௳ࢆ᳨ウࡍࡿୖ࡛㔜せ࡛࠶ࡿ㸬࣮ࣟࣞࣥࣥࢫ࣭ࣜࣂࣔ࢔ᅜ❧◊✲ᡤ࠿ࡽࡣ㸪400W ࣇ࢓࢖ࣂ࣮࣮ࣞࢨ࣮ࢆᦚ㍕ࡋࡓࢸࢫࢺ࣋ࢵࢻࢆ฼⏝ࡋࡓ⾲㠃≧ἣࡢࣔࢽࢱࣜࣥࢢ࡟㛵ࡍࡿ◊✲ࡀሗ࿌ࡉࢀ㸪OCT ἲ࡟ࡼࡿࢫ࢟ࣕࣥࣃࢱ࣮ࣥ࡜⾲㠃⢒ࡉ୪ࡧ࡟ኚᙧ≧ἣࢆࣔࢽࢱࣜࣥࢢࡋࡓෆᐜ࡛࠶ࡗࡓ㸬≉࡟㸪ࣜ࢔ࣝࢱ࢖࣒࡛ࡢ࣮࣮࢟࣍ࣝ≧ἣࡢほᐹࡣḞ㝗Ⓨ⏕ࡢཎᅉࢆ▱ࡿࡓࡵ࡟᭷ຠ࡛࠶ࡿࡇ࡜ࡀ♧ࡉࢀࡓ㸬ࡲࡓ㸪ࢸࢫࢺ࣋ࢵࢻ࡟㧗㏿㧗࢚ࢿࣝࢠ࣮X ⥺࣓࢝ࣛࢆྲྀࡾ௜ࡅ࡚㸪ࣃ࢘ࢲ࣮࣋ࢵࢻ࡟࣮ࣞࢨ࣮ࢆ↷ᑕࡋࡓ㝿ࡢᣲື࡟ࡘ࠸࡚┿✵ᗘࢆኚ࠼࡚ほᐹࡋࡓ⤖ᯝ㸪
࣭P=1atm ࡛ࡣ㸪࢞ࢫ࡟ࡼࡿୖ᪼Ẽὶࡀࡳࡽࢀ⢊ᮎࡀ⯙࠸ୖࡀࡿ࣭P=0.05atm ࡛ࡣ㸪࢞ࢫ࡟ࡼࡿୖ᪼Ẽὶ࡜ୗ㝆ẼὶࡀⓎ⏕ࡋ⢊ᮎࡢᣲືࡀ」㞧࡜࡞ࡿ࣭P=10-4atm ࡛ࡣ㸪ࢫࣃࢵࢱ࡜⢊ᮎࡀᩓ஘ࡍࡿ⌧㇟ࡀⓎ⏕ࡍࡿࡇ࡜ࡀሗ࿌ࡉࢀࡓ㸬 ௨ୖࡢࡼ࠺࡟㸪ࢸࢫࢺ࣋ࣥࢳࢆ฼⏝ࡋࡓ in-situ ࣔࢽࢱࣜࣥࢢ࠿ࡽ࣮ࣞࢨ࣮↷ᑕ᫬ࡢ⁐⼥จᅛ⌧㇟ࡢゎ᫂࡟ࡼࡿḞ㝗Ⓨ⏕ࡢཎᅉࡀ᫂ࡽ࠿࡜࡞ࡗ࡚ࡁ࡚࠾ࡾ㸪ရ㉁ಖドࡢࡓࡵ࡟㔜せ࡞▱ぢࢆ୚࠼࡚࠸ࡿ㸬(6)ᮦᩱ㛤Ⓨ࡟࠾࠸࡚ࡣ㸪㧗ᙉᗘ࢔࣑ࣝࢽ࣒࢘ྜ㔠ࡢ㛤Ⓨࡀ࣍ࢵࢺ࡞ヰ㢟࡛࠶ࡿ㸬ࡇࢀࡣ㸪㧗ᙉᗘ࢔࣑ࣝࢽ࣒࢘ྜ㔠࡛ࡣ㸪⁐⼥จᅛ᫬࡟จᅛ๭ࢀࢆక࠸ࡓࡵ࡟㸪㐀ᙧࡀ㞴ࡋ࠸࡜ࡉࢀ࡚࠸ࡿࡓࡵ࡛࠶ࡿ㸬Fraunhofer ◊✲ᡤ࡜ RWTHAahen ኱Ꮫࡀ㛤ⓎࡋࡓAconity3D ♫ࡢ AconityOne ࡟ࡼࡾ㸪A6061 ྜ㔠ࡢ
L-PBF 㐀ᙧ࡟㛵ࡍࡿ◊✲࡛㸪┦ᑐᐦᗘ 98.7㸣࡛ࢡࣛࢵࢡࣇ࣮ࣜࡢྜ㔠ࡀᚓࡽࢀࡓ࡜ࡢሗ࿌࡛࠶ࡗࡓ㸬ࡇࢀࡣ㸪㏻ᖖࡢ⿦⨨࡛ࡣ㞴ࡋ࠸ணഛຍ⇕ ᗘࢆ㧗࿘Ἴຍ⇕࡟ࡼࡾ㧗㐀ᙧࡋ࡚࠸ࡿࡓࡵ࡜⪃࠼ࡽࢀࡿ㸬ࡲࡓ㸪୰ᅜࡢࢢ࣮ࣝ

－ 57 －

ࣉ࠿ࡽࡣ㸪A7075 ྜ㔠ࡢ㐀ᙧ࡟㛵ࡋ࡚㸪࣮ࣞࢨ࣮ฟຊ
200W㸪㉮ᰝ㏿ᗘ 150mm/s ࡛┦ᑐᐦᗘ 99㸣ࡢࢡࣛࢵࢡ
ࡢ࡞࠸㐀ᙧయࡀᚓࡽࢀࡓ࡜ሗ࿌ࡉࢀࡓ㸬㧗ᙉᗘ࢔࣑ࣝࢽ࣒࢘ྜ㔠 A2024㸪A6061㸪A7075 ࡞࡝ࡢྜ㔠࡛ࡣจᅛ๭ࢀ(solidification crack)㸦࠶ࡿ࠸ࡣ㧗๭ࢀ(hot tearing)㸧ࡀⓎ⏕ࡍࡿࡓࡵ㸪AM ᢏ⾡ࡢ㐺⏝ࡀ㞴ࡋ࠸ࡇ࡜ࡀሗ࿌ࡉࢀ࡚࠸ࡿ㸬ࡇࢀࡽࡢྜ㔠࡟࠾ࡅࡿจᅛ๭ࢀࡣ㸪จᅛ㛤ጞ㸦ᾮ┦⥺㸧࡜จᅛ⤊஢㸦ᅛ┦⥺㸧ࡲ࡛ࡢ ᗘᕪࡀ኱ࡁ࠸ࡇ࡜࠿ࡽ㸪⤖ᬗ⢏⏺࡛ࡢ೫ᯒࡀ㉳ࡇࡾࡸࡍࡃ㸪ࡲࡓ⤖ᬗ⢏ࡢᡂ㛗࡟ࡼࡾᾮ┦ࡢ౪⤥ࡀ㞴ࡋࡃ࡞ࡿࡓࡵ࡜࠸ࢃࢀ࡚࠸ࡿ㸬ࢡࣛࢵࢡⓎ⏕ࢆ㜵Ṇࡍࡿࡓࡵ࡟ࡣ㸪ୖ㏙ࡢࡼ࠺࡟㐀ᙧ᫬࡟㧗 ࡟ಖᣢࡋ࡚࠸ࡃ᪉ἲ࡜Zhang ࡽ(5)ࡀሗ࿌ࡋ࡚࠸ࡿࡼ࠺࡟㸪㧗࢚ࢿࣝࢠ࣮ᐦᗘ࡛ࡢ㐀ᙧࢆ⾜࠺᪉ἲࡀ⪃࠼ࡽࢀࡿ㸬ⴭ⪅ࡽࡢ◊✲࡟࠾࠸࡚ࡶ㸪A2024 ཬࡧ A6061 ࡟࠾࠸࡚ࡣ㸪ᅗ 3(a)࡟♧ࡍࡼ࠺࡟୍⯡ⓗ࡟㐺⏝ࡉࢀ࡚࠸ࡿ㐀ᙧ᮲௳࡛ࡣ㸪ࢡࣛࢵࢡࡀⓎ⏕ࡍࡿࡇ࡜ࢆ☜ㄆࡋ࡚࠸ࡿ㸬୍⯡ⓗ࡟฼⏝ࡉࢀ࡚࠸ࡿ⿦⨨࡛ࡣ㧗 ಖᣢࡣ㞴ࡋ࠸ࡇ࡜࠿ࡽ㸪㧗࢚ࢿࣝࢠ࣮ᐦᗘ≧ἣୗ࡛ࡢࢡࣛࢵࢡⓎ⏕࡬ࡢᙳ㡪ࢆㄪᰝࡋࡓ㸬ࡑࡢ⤖ᯝ㸪࢚ࢿࣝࢠ࣮ᐦᗘ 500 J/mm³࡜࠸࠺㧗࢚ࢿࣝࢠ࣮ᐦᗘࡢሙྜ࡟ࢡࣛࢵࢡⓎ⏕ࡋ࡟ࡃ࠸ࡇ࡜ࡀࢃ࠿ࡗࡓ㸬 (a) ࢡࣛࢵࢡⓎ⏕ (b) ࢡࣛࢵࢡⓎ⏕࡞ࡋᅗ 3 A6061 ྜ㔠㐀ᙧయࡢ⾲㠃≧ἣ㸬ḟୡ௦ᆺ⏘ᴗ⏝ ' ࣉࣜࣥࢱᢏ⾡㛤Ⓨࣉࣟࢪ࢙ࢡࢺ࡟࠾ࡅࡿ◊✲ᡂᯝ  
 3D 㐀ᙧᢏ⾡◊✲ࢭࣥࢱ࣮࡛ࡣ㸪ᢏ⾡◊✲⤌ྜḟୡ௦ 3D ✚ᒙ㐀ᙧᢏ⾡⥲ྜ㛤Ⓨᶵᵓ(TRAFAM)࡟ࡼࡿ㸦ᖹᡂ 26
ᖺᗘ㹼30 ᖺᗘ㸧ࠕḟୡ௦⏘ᴗ⏝ 3D ࣉࣜࣥࢱᢏ⾡㛤Ⓨࣉࣟࢪ࢙ࢡࢺࠖࢆᐇ᪋ࡋ࡚࠸ࡿ㸬ᮏࣉࣟࢪ࢙ࢡࢺ࡟࠾ࡅࡿᇶ♏ᢏ⾡࡛࠶ࡿ⁐⼥จᅛᶵᵓࡢゎ᫂㸪⇕ኚᙧࢩ࣑࣮ࣗࣞࢩࣙࣥᢏ⾡ࡢ㛤Ⓨ㸪ຍᕤࢹ࣮ࢱ࣮࣋ࢫࡢᵓ⠏࡞࡝࡟㛵ࡍࡿ◊✲ࢆᐇ᪋ࡋ࡚࠾ࡾ㸪ࡑࡢ୍㒊ࢆ⤂௓ࡍࡿ㸬
(1)⁐⼥จᅛᶵᵓࡢゎ᫂ 㔠ᒓ✚ᒙ㐀ᙧ࡟࠾࠸࡚ࡣ㸪⁐⼥จᅛᶵᵓࢆ᫂ࡽ࠿࡟ࡋ࡚࠾ࡃࡇ࡜ࡣ㸪㐀ᙧయࡢရ㉁ࢆᏳᐃ໬ࡍࡿࡓࡵ࡟ࡶ㠀ᖖ࡟㔜せ࡞ࡇ࡜࡛࠶ࡿ㸬ࡇࡢࡓࡵ㸪ᮏࣉࣟࢪ࢙ࢡࢺ࡛㛤Ⓨࡋࡓせ⣲ᢏ⾡◊✲ᶵ࡟㧗㏿ᗘ࣓࢝ࣛ࡜ࢧ࣮ࣔࣅ࣮ࣗ࣡ࢆタ⨨ࡋ࡚㸪⁐⼥จᅛ⌧㇟ࡢゎ᫂ࢆ⾜ࡗ࡚࠸ࡿ㸬2016 ᖺᗘࡣ㸪Al-10Si-0.4Mg㸦AlSi10Mg ࡜グ㏙㸧ཬࡧ⣧㖡ࢆ୰ᚰ࡟㧗㏿ᗘ࣓࢝ࣛ࡜ࢧ࣮ࣔࣅ࣮ࣗ࣡࡟ࡼࡾ᳨ウࡋࡓ㸬
AlSi10Mg ࡢほ ౛ࢆᅗ 4 ࡟♧ࡍ㸬AlSi10Mg ࡟ࡘ࠸࡚ࡣ㸪࢖ࣥࢥࢿࣝ 718 ࡢࡼ࠺࡞⣳㗽ᙧࡢ࣓ࣝࢺࣉ࣮ࣝࡀほᐹࡉࢀࡎ㸪ࢫࣃࢵࢱࣜࣥࢢࡶከ࠸ࡇ࡜࠿ࡽ㸪㐀ᙧయ࡟Ḟ㝗ࡀⓎ⏕ࡋࡸࡍ࠸ࡇ࡜ࡀࢃ࠿ࡗࡓ㸬(a) 㧗㏿ᗘ࣓࢝ࣛ࡟ࡼࡿ⁐⼥จᅛ≧ἣ(b) ࣓ࣝࢺࣉ࣮ࣝ㏆ഐࡢ ᗘศᕸᅗ 4 㧗㏿ࣅࢹ࢜ཬࡧࢧ࣮ࣔࣅ࣮ࣗ࣡࡟ࡼࡿ
⁐⼥จᅛ⌧㇟ࡢほ ⤖ᯝࡲࡓ㸪⁐⼥จᅛࢩ࣑࣮ࣗࣞࢩࣙࣥࢯࣇࢺ࢙࢘࢔ࢆ㛤Ⓨࡋࡓ㸬ࡇࡇ࡛ࡣ㸪࢖ࣥࢥࢿࣝ 718 ࢆᑐ㇟࡜ࡋ࡚⢊యࡢ⇕ఏᑟ⋡ࢆ Kunii-Smith ࣔࢹࣝࢆᑟධࡋ㸪࠿ࡘ㸪⢊యࡢ⁐⼥จᅛ࡟ࡼࡿᐦᗘ㸪࢚ࣥࢱࣝࣆ㸪⇕ఏᑟ⋡ࡢ ᗘ౫Ꮡᛶࢆຍ࿡ࡋࡓ㐣Ώఏ⇕ゎᯒࢆ⾜ࡗࡓ⤖ᯝ㸪SLM 㐀ᙧ㐣⛬࡟࠾ࡅࡿ࣮ࣞࢨ࣮↷ᑕ㒊㏆ഐࡢ ᗘศᕸࢆண ࡍࡿࡇ࡜ࡀ࡛ࡁࡓ㸬ࡇࡢ⤖ᯝࡣ㸪ᅗ 5 ࡟♧ࡍࡼ࠺࡟㸪ࢧ࣮ࣔࣅ࣮ࣗ࣡࡟ࡼࡿ ᐃ⤖ᯝ࡜ࡼࡃ୍⮴ࡋࡓ㸬⣧㖡ࡢ⤖ᯝ࡟ࡘ࠸࡚ࡣ㸪⣬㠃ࡢ㒔ྜୖⴭ⪅ࡽࡢሗ࿌(7)ࢆཧ↷㢪࠸ࡓ࠸㸬(2)⇕ኚᙧண ࢩ࣑࣮ࣗࣞࢩࣙࣥ㔠ᒓ✚ᒙ㐀ᙧ࡛ࡣ㸪⁐⼥จᅛ⌧㇟ࢆక࠺ࡇ࡜࠿ࡽ⇕ኚᙧࡀ⏕ࡌࡿࡓࡵ㸪࡛ࡁࡿ㝈ࡾ⇕ኚᙧࡢ࡞࠸㐀ᙧ᮲௳ࢆ᳨ウࡍࡿᚲせࡀ࠶ࡿ㸬ࡋ࠿ࡋ㸪⌧≧࡛ࡣヨ⾜㘒ㄗ࡟ࡼࡿ࡜ࡇࢁࡀከ࠸ࡓࡵ㸪⇕ኚᙧண ࢩ࣑࣮ࣗࣞࢩࣙࣥᢏ⾡ࡢ㛤Ⓨࡣ㔜せ࡜࡞ࡗ࡚࠸ࡿ㸬ᙜࢭࣥࢱ࣮࡛ࡣ㸪ỗ⏝ࢯࣇࢺ࢙࢘࢔ࢆ⏝࠸࡚༢⣧ᙧ≧ࡢ㐀ᙧయ࡟ᑐࡍࡿゎᯒᢏ⾡ࢆ㛤Ⓨࡋ࡚࠸ࡿ㸬2016 ᖺᗘ࡟ࡣ㸪⇕ᙎረᛶゎᯒࡢ࠺ࡕ㸪඲య࡟୍ᵝ࡟ᅛ᭷ࡦࡎࡳࢆ୚࠼ࡿ᪉ἲ࡟ࡼࡿ⇕ኚᙧண ࢩ࣑࣮ࣗࣞࢩࣙࣥࡢ⢭ᗘࢆ᳨ウࡋࡓ㸬ࡇࡇ࡛ࡣ㸪ࡇࡢ᪉ἲࢆ୍ᵝ෭༷ᙎረᛶゎᯒἲ࡜࿧ࡪ㸬⤖ᯝ࡜ࡋ࡚㸪୍ᵝ෭༷ᙎረᛶゎᯒἲ࡛ࡶᐇ㐀ᙧ≀࡜ࡢᑍἲẚ㍑࡛ 3%⛬ᗘࡢㄗᕪ࡟཰ࡲࡿࡇ࡜ࡀ☜ㄆࡉࢀࡓࡢ࡛㸪ࡇࡢ᪉ἲࢆ⏝࠸࡚㸪ࢧ࣏－ 58 －࣮ࢺᵓ㐀ࡢ௜ຍ᪉ἲ࡟ࡼࡿ⇕ኚᙧ࡜ṧ␃ᛂຊࡢኚ໬ࢆ᳨ウࡋࡓ㸬ゎᯒ⤖ᯝࡢ౛ࢆᅗ 6 ࡟♧ࡍ㸬(a) ఏ⇕ࢩ࣑࣮ࣗࣞࢩࣙࣥ⤖ᯝ(b) ࢧ࣮ࣔࣅ࣮ࣗ࣡ ᐃ౛ᅗ 5 ఏ⇕ࢩ࣑࣮ࣗࣞࢩࣙࣥ⤖ᯝ࡜ࢧ࣮ࣔࣅ࣮ࣗ࣡࡟ࡼࡿ ᐃ⤖ᯝࡢẚ㍑

ᅗ 6 ᷸ᆺヨ㦂∦ࡢࢧ࣏࣮ࢺᙧ≧࡜㐀ᙧᚋࡢኚᙧゎᯒ⤖ᯝ(3)ຍᕤࢹ࣮ࢱ࣮࣋ࢫ࠾ࡼࡧᮦᩱࢹ࣮ࢱ࣮࣋ࢫࡢᵓ⠏ せ⣲ᢏ⾡◊✲ᶵ࡟ࡼࡾ㸪ࢽࢵࢣࣝᇶ㉸ྜ㔠㸪࢔࣑ࣝࢽ࣒࢘ྜ㔠ཬࡧ⣧㖡࡟㛵ࡍࡿ᭱㐺㐀ᙧ᮲௳ࡢ᳨ウࢆ⾜࠸㸪⤌⧊ཬࡧᶵᲔⓗᛶ㉁࡟ࡘ࠸࡚ㄪᰝࡋ࡚࠸ࡿ㸬ᅗ 7 AlSi10Mg ྜ㔠ࡢྛฟຊ࡟࠾ࡅࡿ㉮ᰝ㏿ᗘ࡟ᑐࡍࡿᐦᗘࡢኚ໬

AlSi10Mg ྜ㔠ࡢ㧗ฟຊ㸬㧗㏿㐀ᙧ᮲௳ࢆ᳨ウࡋࡓ౛࡟ࡘ࠸࡚㏙࡭ࡿ㸬࣮ࣞࢨ࣮ฟຊཬࡧ㉮ᰝ㏿ᗘࡀ㐀ᙧయᐦᗘ࡟ཬࡰࡍᙳ㡪࡟ࡘ࠸᳨࡚ウࡋࡓ⤖ᯝࢆᅗ 7 ࡟♧ࡍ㸬ࡇࢀ࠿ࡽ㸪㐀ᙧ≀ࡢ┦ᑐᐦᗘࡀ᭱኱࡜࡞ࡿ㉮ᰝ㏿ᗘࡣ࣮ࣞࢨ࣮ฟຊࡢ㐪࠸࡟ࡼࡗ࡚␗࡞ࡿࡇ࡜ࡀࢃ࠿ࡿ㸬ࡲࡓ㸪࣮ࣞࢨ࣮ฟຊࡀప࠸࡯࡝㐀ᙧయࡢ┦ᑐᐦᗘࡀ᭱኱࡜࡞ࡿ㉮ᰝ㏿ᗘࡣ㐜ࡃ࡞ࡾ㸪࣮ࣞࢨ࣮ฟຊࡀ㧗࠸࡯࡝㐀ᙧయࡢ┦ᑐᐦᗘࡀ᭱኱࡜࡞ࡿ㉮ᰝ㏿ᗘࡣ㏿ࡃ࡞ࡗ࡚࠸ࡿࡇ࡜ࡀࢃ
࠿ࡿ㸬࣮ࣞࢨ࣮ฟຊ 700 W ࡛ࡣ㸪㉮ᰝ㏿ᗘ 2200 mm/s࡛ࡶ㧗ᐦᗘࡢ㐀ᙧయࡀᚓࡽࢀ࡚࠸ࡿ㸬ࡇࡢࡼ࠺࡟㸪࣮ࣞࢨ࣮ฟຊࢆ㧗ฟຊ࡟ࡍࡿࡇ࡜࡟ࡼࡾ㸪㧗㏿໬ࡀྍ⬟࡞ࡇ࡜ࡀࢃ࠿ࡗࡓ㸬㸬࠾ࢃࡾ࡟
ୖ㏙ࡋࡓࡼ࠺࡟㸪AM ᢏ⾡࡟࠾ࡅࡿୡ⏺ࡢືࡁࢆࡳࡿ
࡜㸪ࡇࡇᩘᖺࡢᛴ㏿࡞ 3D ࣉࣜࣥࢱࡢᛶ⬟࠾ࡼࡧ AM ᢏ⾡ࡢྥୖ࡟ࡼࡾ㸪ᮏᢏ⾡ࡢ㧗௜ຍ౯್〇ရ࡬ࡢ㐺⏝ࡣ┠ぬࡲࡋ࠸ࡶࡢࡀ࠶ࡿ㸬ࡲࡓ㸪⁐⼥จᅛ⌧㇟ࡢゎ᫂ࡸࢩ࣑࣮ࣗࣞࢩࣙࣥᢏ⾡ࡢ㛤Ⓨ࡞࡝ࡢᇶ♏ⓗ࡞◊✲㛤Ⓨࡶྛᅜࡢࣉࣟࢪ࢙ࢡࢺࡢ㐍⾜࡜࡜ࡶ࡟ᛴ㏿࡟㐍ࢇ࡛࠸ࡿ㸬ᮏ✏࡛ࡣ㸪ࡑࡢ୍➃ࢆ⤂௓ࡋࡓ㸬ᮏ✏ࡀㄞ⪅ࡢⓙᵝࡢཧ⪃࡜࡞ࢀࡤᖾ࠸࡛࠶ࡿ㸬 ᮏ✏ࢆࡲ࡜ࡵࡿ࡟ᙜࡓࡾࡈ༠ຊ㡬࠸ࡓ㏆␥኱Ꮫḟୡ௦ᇶ┙ᢏ⾡◊✲ᡤ࣭3D 㐀ᙧᢏ⾡◊✲ࢭࣥࢱ࣮㛵ಀ⪅ྛ఩࡞ࡽࡧ࡟◊✲ᐊࡢ㝔⏕ㅖྩ࡟ㅰពࢆ⾲ࡍࡿ㸬ཧ⪃ᩥ⊩(1) ிᴟ⚽ᶞ㸪ụᗉྖᩄᏕ㸪⡿ཎ∾Ꮚ㸪㏆␥኱Ꮫḟୡ௦ᇶ┙ᢏ⾡◊✲ᡤሗ࿌, 8, (2017), pp.179-183(2) H. Kyogoku, Metal Additive Manufacturing,Autumn/Fall 2015, 1, (2015), pp.31-39(3) ிᴟ⚽ᶞ, ༓ⴥᬗᙪ㸪ᶫ㇂㐨᫂㸪ྩᓥᏕᑦ㸪ᒸᮏ⦾ᶞ㸪ᯇ⏣ᆒ㸪࣮ࣞࢨຍᕤᏛ఍ㄅ㸪25, (2018),
pp.6-11(4) Proceedings of SFF Symposium 2017,Austin,TX. (2017)(5) H. Zhang, H. Zhu, T. Qi, Z. Hu, X. Zeng,Materials Science & Engineering A, 656(2016),
pp.47-54(6) ᢏ⾡◊✲⤌ྜḟୡ௦ 3D ✚ᒙ㐀ᙧᢏ⾡⥲ྜ㛤Ⓨᶵᵓ㸪͆ࡦࡽࡵࡁࢆᙧ࡟㸟 タィࡀኚࢃࡿ᪂ࡋ࠸ࣔࣀ
࡙ࡃࡾ͇ࢩ࣏ࣥࢪ࣒࢘ㅮ₇㞟㸪(2017)(7) T.-T. Ikeshoji, K. Nakamura, M. Yonehara, K.
Imai, H. Kyogoku㸪Journal of Minerals, Metals
and Materials Society, Vol.70, (2018),
pp.396-400－ 59 －