Magnetic pulse welding: Targeted manipulation of weld seam formation

磁脉冲焊接：有针对性地控制焊缝形成

• 批准号: 227652982
• 负责人: Professor Dr.-Ing. Eckhard Beyer
• 金额: --
• 依托单位: Institut für Umformtechnik und Leichtbau (IUL)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/227652982?language=en
• 关键词: Magnetic; pulse; welding; Targeted; manipulation

Magnetic Pulse Welding (MPW) is a technology that allows for joining dissimilar materials due to high speed deformation and collision. In the first two funding periods of the priority program 1640, the joining mechanism and the key parameters for the production of long weld seams were investigated. On this basis, the focus in the third period of the collaborative research project is on the targeted intensification of the joining mechanism. Furthermore, measurement instruments for process control and prediction of the weld quality will be developed and tested. The duration of the magnetic pressure was identified as one of the major parameters. The influence of different pressure versus time plots on the forming behavior of the flyer will be studied. Therefore, the continuation of the successful cooperation between the Institute of Forming Technology and Lightweight Construction (IUL) at TU Dortmund university and the Institute of Manufacturing Technology (IF) at TU Dresden university is intended. This constellation offers advantages, since both institutes possess complementary pulse generators for the creation of discharging pulses with high and low frequencies. The complementary expertise of both institutes, forming and joining technology by IUL and joining technology and microstructure by IF, guarantee the success within the project procedure, supported by the cooperation with Fraunhofer IWS. The positive effect of thick and ductile coatings on the joint formation was discovered during the second period. The objective for the next period is to identify the material properties that are responsible for this phenomenon, e.g. the damping behavior of the coatings. Therefore, the established cooperation with the subgroup A4 will be extended. Additionally, the results will be transferred to achieve welding between parts with brittle coatings or additively manufactured samples. The contactless characterization of MPW seams through ultrasonic technology will be studied during the cooperation with the subgroup A2. Furthermore, the optical measurement of the flyer deformation will be used as an inline-process monitoring. After completion of the project, the basis for the further process adjustment close to the requirements of industrial users will be laid.

磁脉冲焊接（MPW）是一种通过高速变形和碰撞来连接异种材料的技术。在优先计划 1640 的前两个资助期内，对长焊缝生产的连接机制和关键参数进行了研究。在此基础上，第三期合作研究的重点是有针对性地强化加入机制。此外，还将开发和测试用于过程控制和焊接质量预测的测量仪器。磁压力的持续时间被确定为主要参数之一。将研究不同压力与时间图对飞翼成形行为的影响。因此，多特蒙德工业大学成形技术和轻质结构研究所（IUL）与德累斯顿工业大学制造技术研究所（IF）的成功合作旨在延续。这个星座具有优势，因为两个研究所都拥有互补的脉冲发生器，用于产生高频和低频的放电脉冲。两个研究所的互补专业知识（IUL 的成形和连接技术以及 IF 的连接技术和微观结构）在与 Fraunhofer IWS 合作的支持下保证了项目流程的成功。在第二阶段发现了厚而延展的涂层对接头形成的积极影响。下一阶段的目标是确定导致这种现象的材料特性，例如涂层的阻尼行为。因此，与A4小组既定的合作将得到延续。此外，结果将被转移以实现具有脆性涂层的零件或增材制造样品之间的焊接。在与 A2 小组合作期间，我们将研究通过超声波技术对 MPW 焊缝进行非接触表征。此外，飞片变形的光学测量将用作在线过程监控。项目建成后，将为进一步工艺调整贴近工业用户的要求奠定基础。