Property-controlled process design of freeform bending considering material properties of the semi-finished product

考虑半成品材料特性的自由弯曲性能控制工艺设计

• 批准号: 424334318
• 负责人: Professor Dr.-Ing. Boris Lohmann
• 金额: --
• 依托单位: Lehrstuhl für Regelungstechnik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/424334318?language=en
• 关键词: Property; controlled; process; design; freeform

The overall objective of the overall research project is the scientific elaboration of a soft sensor-based control structure that reacts to fluctuations in the semi-finished product as well as in the process. As required for a given target geometry, the control structure is able to adjust residual stresses and other mechanical properties (hardness, ductility, strength) in the bent tube. Based on this formulation of objectives, sub-objectives building on one another were formulated, while all relevant fundamentals were already developed in the first two funding periods. In the third phase of the given research project, the focus will lie on the implementation of the property-controlled free-form bending process with a moving die in real time with continuous feed under production conditions. Therefore, the soft sensor technology and the control system will be embedded in the machines control system, and the overall control loop will be investigated experimentally. Subsequently, the proof of the positive effect of the property control for free-form bent components is demonstrated using a test rig and experiments. Furthermore, the soft sensor-based property control methodology will be applied to more complex component geometries as well as other materials (e.g., ferritic stainless steel or higher-strength steel) and analyzed scientifically. The research project will conclude in deriving generally applicable design principles for the property-controlled free-form bending process.

整个研究项目的总体目标是科学地阐述基于软传感器的控制结构，该结构对半成品以及过程中的波动做出反应。根据给定目标几何形状的要求，控制结构能够调节弯管中的残余应力和其他机械性能（硬度、延展性、强度）。在制定目标的基础上，又制定了相互依存的次级目标，而所有相关的基本要素在头两个供资期内都已制定。在给定的研究项目的第三阶段中，重点将在于在生产条件下连续进给的真实的时间内利用移动模具实施性能控制的自由形式弯曲过程。因此，将软测量技术和控制系统嵌入到机床控制系统中，并对整个控制回路进行实验研究。随后，使用试验台和实验证明了自由形式弯曲部件的属性控制的积极效果。此外，基于软传感器的特性控制方法将应用于更复杂的部件几何形状以及其他材料（例如，铁素体不锈钢或更高强度的钢），并进行科学分析。研究项目将得出普遍适用的设计原则的性能控制的自由形式弯曲过程。