Process Control Methods in Cold Wire Gas Metal Arc Additive Manufacturing
Process Control Methods in Cold Wire Gas Metal Arc Additive Manufacturing
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DOI：
10.3390/met13081334
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发表时间：
2023-07
期刊：
影响因子：
2.9
通讯作者：
João B. Bento;Chong Wang;J. Ding;S. Williams
中科院分区：
文献类型：
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作者：
João B. Bento;Chong Wang;J. Ding;S. Williams
冷丝气体金属电弧（CWGMA）增材制造（AM）比目前在丝电弧增材制造（WAAM）中使用的普通电弧工艺更具生产力和效益。在气体保护金属极电弧焊（GMA）系统中添加非通电焊丝，可以克服工艺限制，并将能量输入与材料进给速率分离。提出了两种新的过程控制方法，即电弧功率和移动速度控制，可以保持所需的几何精度WAAM通过广泛的热条件。通过对高度和宽度的精确控制，焊道的增强区域保持恒定，同时仍然减少了对基材的能量输入;减少了渗透深度、重熔和热影响区（HAZ）;并达到低于10%的稀释度。与所有其他单电弧能量工艺相比，这项工作还提高了生产率，其中使用CWGMA AM使用9.57 kg h−1构建演示部件。
Cold wire gas metal arc (CWGMA) additive manufacturing (AM) is more productive and beneficial than the common electric arc processes currently used in wire arc additive manufacturing (WAAM). Adding a non-energised wire to the gas metal arc (GMA) system makes it possible to overcome a process limitation and decouple the energy input from the material feed rate. Two novel process control methods were proposed, namely, arc power and travel speed control, which can keep the required geometry accuracy in WAAM through a broad range of thermal conditions. The reinforcement area of the bead is kept constant with accurate control over the height and width while still reducing the energy input to the substrate; decreasing penetration depth, remelting, and the heat-affected zone (HAZ); and reaching a dilution lower than 10%. This work also presents improved productivity compared to all the other single-arc energy-based processes with a demonstrator part built using 9.57 kg h−1 with CWGMA AM.