Development of micro-arc welding process

微弧焊接工艺的发展

• 批准号: 07555219
• 负责人: HIRATA Yoshinori
• 金额: $ 5.18万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555219/
• 关键词: Arc welding process; Micro-discharge; Electrical breakdown; Pulse discharge; Field emission; Melting spot; STM; 真空絶縁破壊; インチワ-ム; SEMその場観察

Features of micrometer gap discharge between a wire and a plane has been experimentally investigated in both environments of Scanning Electron Microscope vacuum and the atmosphere. The experimental setup, which is consisted of a thin tungsten electrode, nanometer controlled actuators such as a piezoelectric tripod and an inchworm, and monitoring devices of current and voltage, was constructed. By applying several hundreds voltages to the gap, electrical breakdown and at the same time very small melting of the anode occurs. Diameters of melting spots at the plane specimen depend on the amount of discharge energy. A weld bead like melted zone can be formed by traveling electrode along the surface and applying repeated pulsed voltage for electric discharge.

在扫描电子显微镜真空和大气两种环境下，实验研究了金属丝与平板之间的微米间隙放电特性。实验装置由薄钨电极、压电三脚架和尺蠖等纳米可控驱动器以及电流和电压监测装置组成。通过向差距施加几百个电压，发生电击穿，同时发生阳极的非常小的熔化。平面试样上的熔化点直径取决于放电能量的大小。通过电极沿着表面移动并施加重复的脉冲电压进行放电，可以形成焊道状熔化区。

项目成果

H.Maruo: "Microdischarge phexomera across agap of submicron order" Welding International. 9. 375-383 (1995)

H.Maruo：“跨越亚微米级间隙的微放电火球”焊接国际。

H. Mamo, Y. Hirata, K. Ozaki: "Microdischarge phenomena across a gap of submicron order" Welding International. 9. 375-383 (1995)

H. Mamo、Y. Hirata、K. Ozaki：“跨越亚微米级间隙的微放电现象”焊接国际。