Development of high intensity multibeam laser metal deposition system with blue diode lasers for additively manufacturing of copper rod

被引：12

作者：

Ono, Kazuhiro ^{[1
]}

Sato, Yuji ^{[2
]}

Takazawa, Yuma ^{[1
]}

Morimoto, Yuki ^{[3
]}

Takenaka, Keisuke ^{[2
]}

Yamashita, Yorihiro ^{[4
]}

Funada, Yoshinori ^{[5
]}

Abe, Nobuyuki ^{[2
]}

Tsukamoto, Masahiro ^{[2
]}

机构：

[1] Osaka Univ, Grad Sch Engn, I-1 Suita Shi, Osaka 5650871, Japan

[2] Osaka Univ, Joining & Welding Res Inst, 11-1 Mihogaoka, Osaka 5670047, Japan

[3] Osaka Sangyo Univ, Fac Engn, 3-1-1 Nakagaito, Osaka 5748530, Japan

[4] Natl Inst Technol, Ishikawa Coll, Ishikawa 9290392, Japan

[5] Ind Res Inst Ishikawa, 2-1 Kanazawa Shi, Ishikawa 9208203, Japan

来源：

JOURNAL OF LASER APPLICATIONS | 2021年 / 33卷 / 04期

基金：

日本科学技术振兴机构;

关键词：

pure copper; blue diode laser; laser metal deposition; multi-beam; additive manufacturing; PURE-COPPER; ANISOTROPY;

D O I：

10.2351/7.0000510

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A 100 W blue diode laser with an optical fiber having a core diameter of 100 mu m was developed and installed into a blue diode laser metal deposition system (B-LMD), achieving a laser intensity of 7.58 x 10(4) W/cm(2), four times higher than that of the previous B-LMD system. The increase in laser intensity is expected to enable faster and more efficient 3D processing of pure copper. The authors conducted the rod formation experiment by varying the processing speed. The rod formation process is observed with a high-speed video camera to clarify the mechanism of copper rod formation. As a result of rod formation as a 3D modeling of pure copper, a 30 mm rod was formed in 1.5 s under the following conditions: a laser intensity of 1.27 x 10(6) W /cm(2), a powder feed rate of 220 mg/s, and a processing speed of 20 mm/s. It was found that the mode of rod forming changed depending on the processing speed. When the processing speed is high, the mode becomes molten layer type and the energy efficiency becomes high. In addition, the processing point became closer to the focal point at high speed, and the cross-sectional shape of the formed rod was closer to the circular ones.

引用

页数：6

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