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 焊接工艺的自动化中，尽管工艺边界条件不同，但如何确保焊缝质量仍然是一个主要问题。尽管目前有一些策略可以通过传感器（通常是处于领先位置的传感器）检测这些偏差，并通过校正焊枪位置和/或调整焊接参数来自动补偿，但这仅在有限的工艺限制内（通常改变焊接速度）是可能的。然而，手动焊接的适应策略具有以下优点：根据手动焊工的经验，它可以在相当大的工艺窗口中使用，从而补偿与工艺边界条件的较大偏差。这些策略主要涉及调整焊接速度、改变焊枪的位置和/或方向以及局部调整能量和填充材料的供应。手动焊工根据其培训和多年的经验，直观地决定哪种策略适合每种情况。因此，该项目的目的是将手动焊接程序转移到自动焊接工艺，从而在工艺边界条件出现偏差的情况下大大扩展适应焊接工艺的工艺限制。转向自动化焊接的一个重要先决条件是基于手工焊工方法制定适应策略，其本质上是针对熔池的开发和控制。此外，必须制定基于焊接专家数字化知识的决策标准，以确定何时以及在何种情况下应使用合适的适应策略。