Electro-mechanical molten pool control for adapting deviations in the process boundary conditions during automated gas shielded metal arc welding

机电熔池控制，用于适应自动气体保护金属电弧焊过程中工艺边界条件的偏差

• 批准号: 409759303
• 负责人: Professor Dr.-Ing. Uwe Reisgen
• 金额: --
• 依托单位: Institut für Schweißtechnik und Fügetechnik (ISF)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/409759303?language=en
• 关键词: Electro; mechanical; molten; pool; control

In the automation of MSG welding processes, there is a major problem in ensuring weld seam quality despite varying process boundary conditions. Although there are currently strategies by which these deviations are detected by sensors (usually sensors in leading position) and automatically compensated by correction of the welding torch position and/or adaptation of the welding parameters, this is only possible within limited process limits (usually varying the welding speed). Adaptation strategies for manual welding, however, offer the advantage that, depending on the manual welder's experience, it can be used in considerably larger process windows and thus compensate for larger deviations from the process boundary conditions. These strategies mainly involve adapting the welding speed, changing the positioning and/or orientation of the welding torch as well as the locally adapted supply of energy and filler materials. The decision as to which strategy is suitable for each individual case is made intuitively by the manual welder based on his training and many years of experience.The aim of the project is, therefore, to transfer the procedure for manual welding to the automated welding process and thereby considerably extend the process limits for adapting the welding process in case of deviations in the process boundary conditions. An important prerequisite for the transfer to automated welding is the development of adaptation strategies based on the manual welder's approach, which is essentially aimed at the development and control of the weld pool. Furthermore, decision criteria based on digitized knowledge of welding experts about when and in which situation a suitable adaptation strategy should be used have to be developed.

在MSG焊接过程的自动化中，尽管过程边界条件不同，但仍有一个主要问题在确保焊接接缝质量。尽管当前有一些策略通过传感器（通常处于领先位置的传感器）检测到这些偏差，并且通过校正焊接割炬位置和/或适应焊接参数会自动补偿，但这仅在有限的过程限制内（通常会改变焊接速度）。但是，手动焊接的适应策略具有一个优势，它取决于手动焊工的经验，可以在相当大的过程窗口中使用，从而弥补了与过程边界条件的更大偏差。这些策略主要涉及调整焊接速度，更改焊接火炬的定位和/或方向以及当地适应的能源和填充材料的供应。关于手册焊工的培训和多年经验，手动焊机可以直观地做出的决定，该项目的目的是将手动焊接的程序转移到自动化焊接过程中，从而大大扩展了在过程边界条件下偏离焊接过程的过程限制。转移到自动焊接的一个重要先决条件是基于手动焊机的方法制定适应策略，该方法实质上旨在开发和控制焊接池。此外，必须基于对焊接专家的数字知识知识的决策标准，必须使用适当的适应策略来制定适当的适应策略。