Production and heat treatment of composite components by temperature-assisted incremental tube forming

为了减少二氧化碳排放和减少资源，越来越多的制造公司正在遵循轻量化设计的理念。可以采用各种策略，例如使用具有高比强度的部件、负载适应结构或功能集成。这对成形工艺的灵活性提出了特别的挑战，例如，允许材料的局部变化和对变化的局部材料性质的调整。基于此，各种方法应运而生，以满足对部件的要求。这些措施包括所谓的裁剪、使用高强度材料、热辅助工艺和使用复合部件。复合组件使以有针对性的方式组合特定材料属性成为可能。该项目的目标是在一步工艺中生产、分级和渐进成形复合管。其目的是制造具有抗氧化外管和可硬化内管的复合材料。计划的实施是基于温度辅助的渐进管成形和随后的回火，以生产具有不同弯曲半径和横截面的部件，以及适应纵轴要求的性能。根据最先进的技术水平和特定于项目的前期工作，将调查同时进行复合材料生产和成型是否会产生协同效应，从而导致改进和更复杂的产品。该工艺可用于生产具有根据机械负荷和/或耐化学性要求而定制的性能的复合材料部件，这些部件要么不可能使用其他已知工艺生产，要么只能以相当大的成本生产。由此产生的复合材料强度将由解析或半解析模型来描述。

In an effort to reduce CO2 emissions and resources, more and more manufacturing companies are following the philosophy of lightweight design. Various strategies can be pursued, such as the use of components with high specific strength, load-adapted structures or functional integration. This poses particular challenges for the flexibility of the forming processes, for example to enable a local variation of the material and the adjustment of varying local material properties. Based on this, various methods arise to meet the requirements for components. These include so-called tailoring, the use of high-strength materials, thermally assisted processes and the use of composite components. Composite components make it possible to combine specific material properties in a targeted manner. The aim of this project is the production, grading and incremental forming of composite tubes in a single process step. The aim is to produce composites with oxidation-inhibiting outer tubes and hardenable inner tubes. The planned implementation is based on temperature-assisted incremental tube forming and subsequent tempering, in order to produce components with variable bending radii and cross-sections and properties adapted to requirements along the longitudinal axis. On the basis of the state of the art and the project-specific preliminary work, it will be investigated whether simultaneous composite production and forming generates synergies that lead to improved and more complex products. The process could be used to produce composite components with properties tailored to requirements in terms of mechanical loads and/or chemical resistance, which are either impossible to produce using other known processes or can only be produced at considerably greater expense. The resulting composite strength is to be described by analytical or semi-analytical models.