Influence of preparation-induced residual stresses in the cutting edge of cutting tools on the wear behavior of extremely hard cutting materials

切削刀具切削刃中制备引起的残余应力对极硬切削材料磨损行为的影响

• 批准号: 445562529
• 负责人: Professor Dr. Bernd Breidenstein
• 金额: --
• 依托单位: Institut für Fertigungstechnik und Werkzeugmaschinen (IFW)
• 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/445562529?language=en
• 关键词: Influence; preparation; induced; residual; stresses

The cutting edge microgeometry has a significant influence on tool life. By preparation processes such as brushing, grinding or laser ablation of tools, this can be set in a targeted manner. The preparation processes significantly influences the residual stress condition and thus the tool life. In order to understand the influence of the preparation processes on the residual stress state, residual stress measurements in the influenced area of the cutting edge are necessary. Due to the very small measuring range, it is not possible to determine the residual stresses using X-ray methods. Raman microscopy is a method which offers measuring residual stresses locally in the cutting edge. After calibration of the measuring method by applying load stresses, PCD and PcBN tools will be prepared by grinding, laser ablation, brushing or EDM. The residual stress state is then determined using Raman microscopy and the tools are applied in turning experiments with AlSi10Mg or 100Cr6 to determine the influence of the residual stresses on tool life. The originality of the project is characterised by the establishment of a measuring method for the determination of local residual stresses directly in the cutting edge and their consideration in a machining simulation in order to obtain a deeper understanding of wear and failure mechanisms in the cutting materials PCD and PcBN.

尖端微几个几个几何对工具寿命有重大影响。通过准备诸如工具的刷牙，研磨或激光消融之类的过程，可以以目标方式进行设置。制备过程显着影响残余应力状况，从而影响刀具寿命。为了了解制备过程对残余应力状态的影响，需要对尖端受影响区域的残留应力测量。由于测量范围很小，因此无法使用X射线方法确定残余应力。拉曼显微镜是一种方法，可在尖端边缘进行测量的残余应力。通过施加负载应力来校准测量方法后，将通过磨，激光消融，刷子或EDM制备PCD和PCBN工具。然后使用拉曼显微镜确定残留应力状态，并将工具应用于ALSI10MG或100CR6的转动实验中，以确定残留应力对工具寿命的影响。该项目的独创性的特征是建立了一种测量方法，用于直接在尖端边缘确定局部残留应力，并在加工模拟中考虑其考虑，以便更深入地了解切割材料PCD和PCBN中的磨损和故障机制。