Self-consistent modelling of arc, material transfer and seam structure in gas metal arc welding

熔化极气体保护焊中电弧、材料传递和焊缝结构的自洽建模

• 批准号: 430188740
• 负责人: Professor Dr.-Ing. Uwe Füssel
• 金额: --
• 依托单位: Professur für Fügetechnik und Montage
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/430188740?language=en
• 关键词: Self; consistent; modelling; arc; material

The aim of the project is to develop, validate and apply a process model for the numerical description of the resulting joining zone of gas metal arc welding including all relevant physical processes in the arc as well as the melts at the wire electrode and parent material. The calculation should be physically self-consistent and dependant on the process parameters. It should enable well-founded statements regarding the resulting penetration profile, seam structure and heat input into the parent material. The developed process model meets the requirements of the industry for complete modelability of all joining processes as part of industry 4.0. In order to guarantee a high informative value of the process model while simultaneously taking into account the different time scales of the relevant sub-processes, a model of droplet detachment is sequentially coupled with a weld pool model. The combination of the sub models is achieved by implementing the characteristics of the arc and the material transfer in the weld pool model by source terms, which are calculated using the droplet detachment model. In the first part of the project, existing models of droplet detachment and weld pool will be enlarged to enable physically self-consistent and time-efficient modelling of gas metal arc welding. In the course of the subsequent model application, it will be determined whether the developed modelling approach can be transferred to other welding tasks and materials of practical relevance. The developed process model enables a detailed analysis of the cause and effect chain in gas metal arc welding as well as the numerical predictability of the resulting weld in a wide range of parameters, thus enabling a physically determined development of the gas metal arc welding process itself as well as the equipment used.

该项目的目的是开发、验证和应用一个过程模型，用于对气体保护金属极电弧焊产生的连接区域进行数值描述，包括电弧中的所有相关物理过程以及焊丝和母材处的熔体。计算在物理上应该是自洽的并且取决于过程参数。它应该能够就最终的渗透剖面、接缝结构和母材的热量输入提供有根据的陈述。开发的流程模型满足行业对作为工业 4.0 一部分的所有连接流程的完整可建模性的要求。为了保证过程模型的高信息价值，同时考虑相关子过程的不同时间尺度，熔滴脱离模型依次与熔池模型耦合。子模型的组合是通过使用熔滴脱离模型计算的源项来实现焊池模型中电弧和材料传递的特性来实现的。在该项目的第一部分中，将扩大现有的熔滴脱离和熔池模型，以实现气体保护金属电弧焊的物理自洽且高效的建模。在后续的模型应用过程中，将确定所开发的建模方法是否可以转移到实际相关的其他焊接任务和材料中。开发的工艺模型能够对熔化极气体保护焊中的因果链进行详细分析，并在各种参数下对所得焊接进行数值可预测性，从而实现熔化极气体保护焊工艺本身以及所用设备的物理确定的开发。