Process-reliable adjustment of subsurface zone properties in the machining of high-strength and ductile steels using an adaptive manufacturing system

使用自适应制造系统对高强度和延性钢加工中的地下区域特性进行过程可靠的调整

• 批准号: 401800578
• 负责人: Professor Dr. Bernd Breidenstein
• 金额: --
• 依托单位: Institut für Werkstoffkunde (IW)
• 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/401800578?language=en
• 关键词: Process; reliable; adjustment; subsurface; zone

Influencing the component subsurface zone is an elementary step in the manufacturing process. A combination of martensitic hardening of a subsurface zone and near-net-shape manufacturing represents a great potential to produce components with wear-resistant subsurface zones in an energy- and time-saving way. In the first funding period, an in-process soft sensor was developed and a deeper understanding of the transformation of austenitic microstructural constituents into martensite in a turning process was obtained. The aim of the proposed project is to investigate a dynamic feedforward loop for the process-safe adjustment of subsurface zone properties in the machining of high-strength and ductile steels by means of a deformation-induced austenite-martensite transformation. The combination of the geometry to be adjusted, the surface quality and the subsurface condition in the final machining by means of a multi-stage turning process is considered. On the basis of the detected initial state, the appropriate process parameters are set using the knowledge of the interrelationships of the phase transformation in the turning process in order to be able to generate the desired properties in the process. For this purpose, disturbing influences on the transformation of retained austenite during external longitudinal turning under cryogenic cooling in the process are evaluated. The setting of desired target states is based on the modelling of local transformation processes in a technological NC simulation, taking process-related uncertainties into account. With the help of a dynamic subsurface zone model, the prediction of the in-process eddy current characteristics is to be made on the basis of the subsurface zone microstructure. All elements are incorporated into the dynamic feedforward control for the targeted adjustment of the austenite-martensite transformation in the process. Research into the possibilities and limits of the method provides fundamental knowledge on the robustness of setting various specified target values by means of dynamic feedforward control.

影响组件地下区域是制造过程中的基本步骤。地下区域和近网形制造的马塞西氏菌硬化的结合代表了以能量和节省时间的方式生产具有耐磨性地下区域的组件的巨大潜力。在第一个资金期间，开发了一个过程中的软传感器，并在转弯过程中获得了对奥氏体微结构成分转化为马氏体的转化。拟议项目的目的是通过通过变形诱导的奥斯丁岩 - 玛氏度转换来研究在高强度和延性钢的加工中地下区域特性的过程安全循环。考虑到要调整的几何形状，通过多阶段转弯过程在最终加工中的表面质量和地下条件的组合。根据检测到的初始状态，使用转向过程中相变的相互关系的知识来设置适当的过程参数，以便能够在该过程中生成所需的属性。为此，评估了在此过程中在低温冷却下外部纵向转动期间对保留奥氏体转化转化的影响。所需目标状态的设置基于技术NC模拟中局部转换过程的建模，考虑了与过程相关的不确定性。借助动态地下区域模型，将根据地下区域微结构进行预测的涡流电流特征。将所有元素纳入动态前馈控制中，以在此过程中进行针对性的奥斯丁 - 马氏体转换。该方法的可能性和限制的研究提供了有关通过动态前馈控制设置各种指定目标值的鲁棒性的基本知识。