Wear prediction and characterisation of load-adjusted profiles with secondary design elements within draw bending

拉延弯曲中具有二次设计元素的负载调整型材的磨损预测和表征

• 批准号: 507245889
• 负责人: Professor Dr.-Ing. Bernd-Arno Behrens
• 金额: --
• 依托单位: Institut für Umformtechnik und Umformmaschinen (IFUM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/507245889?language=en
• 关键词: Wear; prediction; characterisation; load; adjusted

The investigations of the first research period have shown the feasibility of draw bending with integrated heat treatment for the production of load-adapted profile components. The following term aims to investigate the draw bending process regarding the production of variable profile cross-sectional geometries with secondary forming elements. The stiffness of the profiles and thus their application range is to be increased by the application of the secondary design elements. Moreover, the possibility to produce variable profile cross sections and a partial heat treatment makes it possible to produce components with tailored properties. For this purpose, an optimized geometry of the blank is to be developed and analyzed using numerical simulations. In addition, an enhancement of the draw bending machine is also planned for the second application period which will allow the production of complex geometries.For the subsequent industrial implementation, fundamental investigations on tribological contact conditions and wear behavior are of vital importance. An increased wear is expected, particularly in the case of secondary forming elements during hot-forming processes. In addition to the technological and scientific challenges, detailed knowledge about the tool wear during draw bending with integrated heat treatment will be obtained. Based on the experimental results of the first research period, a tool wear model for the draw bending process will be developed. The tool wear has to be defined as a function of the process specific contact pressure, the relative velocities as well as the temperature dependent tool hardness and will be implemented in an FE system. The simulative wear prediction will be validated and used to estimate the tool life of the draw bending tools.

第一个研究阶段的调查表明，拉弯与综合热处理的生产负荷适应型材组件的可行性。下一个术语的目的是研究拉弯工艺，该工艺涉及利用二次成形元件生产可变轮廓横截面几何形状。通过应用辅助设计元件，型材的刚度以及它们的应用范围将增加。此外，生产可变截面和局部热处理的可能性使得生产具有定制特性的部件成为可能。为此，将使用数值模拟开发和分析坯料的优化几何形状。此外，还计划在第二个应用阶段对拉弯机进行改进，以便生产复杂的几何形状。对于随后的工业实施，摩擦学接触条件和磨损行为的基础研究至关重要。预计磨损会增加，特别是在热成形过程中的二次成形元件的情况下。除了技术和科学挑战外，还将获得有关拉伸弯曲和集成热处理过程中刀具磨损的详细知识。基于第一阶段的实验结果，将建立拉弯过程的刀具磨损模型。刀具磨损必须被定义为过程特定的接触压力，相对速度以及温度相关的刀具硬度的函数，并将在FE系统中实现。模拟磨损预测将被验证并用于估计拉弯工具的工具寿命。