Production of sheets by hot extrusion of aluminium chips

铝片的直接利用是一种节省资源的替代方法，可以替代传统的铸锭挤压，因为节省了生产半成品的能源密集型初级成形过程。在以往的研究工作中，对铝屑直接挤压加工成固体型材的基础及影响因素进行了研究。铝片直接加工成钣金产品，通过挤压开型材，随后在工艺链中进行膨胀和轧制，以及通过成形工艺对板材进行进一步加工，目前尚未进行研究。前期工作表明，通过铝屑挤压工艺和轧制膨胀工艺可以实现钣金半成品的生产。此外，基于芯片的铝板的机械性能可以通过轧制工艺得到改善，使其与传统生产的铝板相媲美。因此，应该从根本上探索由铝屑通过开型材挤压和轧制膨胀的工艺链以及半成品钣金进一步加工成深拉深制品的成形。挤压和轧制工艺参数对切屑焊接的力学性能和散射产生影响。这些对铝板的成形性也有影响。在数值模拟的基础上，利用解析模型可以估计出切屑焊接各个工艺步骤的物理关系。元件特性的确定显示了基于芯片的元件的潜力及其可能的用途。通过直接将铝片回收成薄片，可以扩大组件和产品的范围，开辟新的市场。此外，节约了能源和资源，减少了二氧化碳的排放，从而降低了生产成本。

The direct utilization of aluminium chips represents a resource-saving alternative to the conventional extrusion of cast ingots, since the energy-intensive primary forming process for the production of semi-finished products is saved. In previous research work, the foundations for the direct processing of aluminium chips into solid profiles by extrusion as well as the influencing parameters were investigated. The direct processing of aluminium chips into sheet metal products by the extrusion of open profiles and subsequent expansion and rolling in a process chain as well as the further processing of the sheets by forming processes has not yet been investigated.Preliminary work shows that the production of sheet metal semi-finished products can be achieved through the extrusion process of aluminium chips and expansion through rolling. In addition, the mechanical properties of the chip-based sheets can be improved by the rolling process, making them comparable to conventionally produced aluminium sheets. The production of aluminium sheets from aluminium chips through the process chain extrusion of open profiles and expansion by rolling and the forming of further processing of semi-finished sheet metal to deep drawing products should therefore be fundamentally explored. The extrusion and rolling parameters influence the chip welding and thus the mechanical properties and their scattering. These also have an influence on the formability of aluminium sheets. The physical relationships of chip welding of the individual process steps can be estimated using an analytical model and based on numerical modelling. The determination of the component properties shows the potential of the chip-based components as well as their possible uses.By directly recycling aluminium chips into sheets, the range of components and products can be expanded, opening up new markets. In addition, energy and resources are saved and CO2 emissions are reduced, which leads to a reduction in production costs.