Control of molten metal column at the wire tip using laser system

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06473
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: National Institute for Materials Science
• Principal Investigator: Nakamura Terumi 国立研究開発法人物質・材料研究機構, 材料創製・加工ステーション, ステーション長 (20354277)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: アーク溶接 / ファイバーレーザ / 溶融金属液柱 / 純Arシールドガス / 切断

Outline of Final Research Achievements

A fiber laser was used in order to achieve stable consumable-electrode welding with pure Ar shielding gas (Ar-GMA). Ar-GMA welding is unstable welding because of a long column of liquid molten metal (CLM), which is generated at the wire tip. This long CLM causes arc instability and irregular short-circuit. Therefore, to stabilize the Ar-GMA welding, it is necessary to shorten this CLM. To shorten the CLM, we have developed a method for cutting the CLM by using of a fiber laser.
Cutting conditions using a fiber laser were investigated. By using appropriate cutting conditions, we were able to control the welding behavior of Ar-GMA welding.

Free Research Field

溶接・接合技術