Fundamental analysis of EDM die-sinking applying different tungsten carbide

不同碳化钨电火花开模加工的基本分析

• 批准号: 446076793
• 负责人: Professor Dr.-Ing. Eckart Uhlmann
• 金额: --
• 依托单位: Fachgebiet Werkzeugmaschinen und Fertigungstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/446076793?language=en
• 关键词: Fundamental; analysis; EDM; die; sinking

The selection of an appropriate tool electrode material for die-sinking electrical discharge machining (EDM) is connected to different boundary conditions. An economic production requires high material removal rate V̇W with minimal relative tool wear ϑ at the same time. Thus, the physical removal principle results in a need for a high electrical conductivity κ, thermal conductivity λ, specific heat capacity cp and a high melting point TS to ensure the best possible discharge characteristics and heat dissipation at the tool electrode. Manufacturing of complex and fine structures like thin bars with low wall thicknesses dW requires a sufficient mechanical strength E of the material. The material properties of tungsten carbide are ideal for the application in EDM. Due to the high effort in machining tungsten carbide, the manufacturing of form electrodes made of tungsten carbide has been neglected so far. The aim of this research project is the validation of different tungsten carbide specifications as tool electrode material for EDM as well as identifying appropriate process parameters for macro- and micro- machining of steel materials. The scientific analysis of the experimental results leads to extensive findings in the area of EDM by analysing the different tungsten carbides and their corresponding process behaviour in EDM. The acquired knowledge and the specific material characteristics of the WC-Co carbide enable the improvement of important process characteristics like material removal rate V̇W and electrode wear ϑ in die-sinking EDM.

选择用于模切电动排放加工（EDM）的合适的工具电极材料连接到不同的边界条件。经济生产需要高材料去除率VİW，同时使用最小的相对工具磨损。这就是物理去除原理导致需要高电导率κ，导热率λ，比热容量CP和高熔点TS，以确保在刀具电极处具有最佳的可能放电特性和散热。制造复杂和精细的结构，例如低壁厚DW的薄棒需要足够的机械强度E。碳化钨的材料特性非常适合在EDM中应用。由于加工碳化钨的努力很大，到目前为止，由碳化钨制成的电极的制造已经被忽略了。该研究项目的目的是验证不同的碳化钨规范作为EDM的刀具材料，并确定用于钢材材料的宏观和微观测量的适当过程参数。对实验结果的科学分析通过分析通过分析碳化钨及其相应的EDM过程行为，从而导致EDM区域的广泛发现。获得的知识和WC-CO碳化物的特定材料特性使重要过程特征的改善，例如材料去除率VİW和电极磨损ϑ die-Sinking EDM中的电极磨损。