Composite Cold Forging of Cold Forged Semi-Finished Parts

该项目的目的是研究冷挤压复合材料的生产和深加工。冷锻造用于生产原始零件，然后通过复合挤压进行进一步加工。整个项目的主要重点是复合材料性能的表征和调整，以及通过组合不同物理性能的材料来提高轻量化潜力和功能集成。可调墙体厚度的确定是工作计划的一部分。在该项目的第一阶段，对工艺链进行了解析、数值和实验分析。这些主要是钢-铝复合轴，作为钢制实心轴的替代品。从力、形体配合、冶金结合等方面对粘结强度进行了分析。混合轴可以通过各种几何形状的复合挤压可靠地生产出来。在该项目的第二阶段，从轻量化结构和功能性方面对复合挤压进行了进一步的研究。轻量化结构的重点是在不降低与最终部件相关的性能的情况下进一步减轻重量，例如扭转刚度。这应通过使用替代的核心材料，如塑料，或通过丢失的核心来生产空心轴来实现。

The aim of the project is the Investigation of the production and further processing of composite compoents by cold extrusion. Cold forging is used for the production of the raw parts, which are then further processed by the composite extrusion. The main focus of the overall project is on the characterization and adjustment of the composite properties as well as on the increase of the lightweight potential and the functional integration by combining materials with different physical properties. The determination of the adjustable wall thicknesses is part of work programm. The mechanical properties resulting from the forming history of the process are used for the production of new lightweight components.In the first phase of the project, the process chain was analyzed analytically, numerically and experimentally. These were mainly steel-aluminium composite shafts as a replacement for solid shafts made of steel. The bond strength was analyzed under the aspects of force and form fit as well as metallurgical bond. Hybrid shafts can be produced reliably with the composite extrusion in various geometries. In the second phase of the project, the composite extrusion is further investigated in terms of lightweight construction as well as functionality. The focus of lightweight construction is on a further weight reduction without reducing the properties, which are relevant for the final component, e.g. torsional stiffness. This should be achieved by the use of alternative core materials, such as plastic, or the production of hollow shafts by means of lost cores.