Measurement and Control of Dynamic Weld Pool Surface in Gas Metal Arc Welding

熔化极气体保护焊动态熔池表面的测量与控制

• 批准号: 0726123
• 负责人: YuMing Zhang
• 金额: --
• 依托单位: University of Kentucky Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-10-01 至 2011-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0726123&HistoricalAwards=false
• 关键词: Measurement; Control; Dynamic; Weld; Pool

The objective of this research is to (1) simultaneously measure the three-dimensional shape of weld pool surface and the growth, detachment and trajectory of molten metal droplets in gas metal arc welding, and (2) use the simultaneous measurements to test the hypothesis that the weld pool surface is controlled by the arc and droplet characteristic parameters. The approach is to (1) image the specular reflection of a projected laser from the weld pool surface to simultaneously measure the weld pool surface and droplet characteristic parameters, (2) use the arc and droplet characteristic parameters to adjust the weld pool surface shape, and (3) use the required arc and droplet characteristic parameters to determine how to change the welding parameters.Gas metal arc welding is the most widely used process in automatic welding. The completion of the research will be of significant help in better understanding this complex process and provide the foundation to develop next generation intelligent welding machines. The multi-disciplinary research and collaborative activities will provide participating graduate and undergraduate students with opportunities to lead the change of manufacturing industry from being a "low-tech" to high-tech industry. Also, a high school senior would join in the challenging research and thus may be attracted to the engineering field. The research would also provide excellent materials for senior design projects. The development of the special website will provide a step-by-step procedure to guide researchers around the world to build the sensor for their research.

本研究的目的是(1)同时测量焊缝熔池表面的三维形状和气体金属电弧焊中熔融金属液滴的生长、脱离和轨迹，(2)利用同时测量来验证焊缝熔池表面受电弧和液滴特征参数控制的假设。该方法是：(1)从焊缝熔池表面对投射激光的镜面反射成像，同时测量焊缝熔池表面和熔滴特征参数；(2)利用电弧和熔滴特征参数调整焊缝熔池表面形状；(3)利用所需的电弧和熔滴特征参数确定如何改变焊接参数。气体保护金属电弧焊是自动焊接中应用最广泛的工艺。该研究的完成将有助于更好地理解这一复杂过程，并为开发下一代智能焊机提供基础。多学科的研究和合作活动将为参与的研究生和本科生提供机会，引领制造业从“低技术”向高科技产业的转变。此外，一个高中毕业生将参加具有挑战性的研究，因此可能会被吸引到工程领域。该研究也将为高级设计项目提供优秀的材料。该特别网站的开发将提供一个循序渐进的过程，指导世界各地的研究人员为他们的研究构建传感器。