在HSS EN HS6-5-2C的精密电放电加工中评估表面完整性
Ľuboslav Straka1, Ján Piteľ2, Ivan Čorný3
1Department of Automobile and Manufacturing Technologies, Faculty of Manufacturing Technologies with the Seat in Presov, Technical University of Kosice, Sturova 31, 080 01 Presov, Slovakia.
Micromachines
|January 8, 2025
概括
这项关于EN HS6-5-2C钢的电流排放机械加工 (WEDM) 的研究发现,特定的主要技术参数 (MTP) 显著影响表面裂密度 (SCD) 和表面粗度 (Ra). 优化这些参数,特别是峰值电流和放电持续时间,对于最小化缺陷和提高加工表面完整性至关重要.
科学领域:
- 材料科学与工程 材料科学与工程
- 制造过程 制造过程 制造过程
- 表面计量学 表面计量学
背景情况:
- 表面完整性是导电材料精密线电放电加工 (WEDM) 的关键质量指标.
- 监测的关键参数包括微观和宏观几何,表面裂密度 (SCD) 和表面粗度 (Ra) 是重要的定性指标.
研究的目的:
- 在使用WEDM技术加工EN HS6-5-2C钢时评估表面裂纹密度 (SCD).
- 确定最佳的主要技术参数 (MTP) 以尽量减少侵蚀表面上的SCD和Ra.
- 开发数学回归模型 (MRM) 来预测和最小化这些定性指标.
主要方法:
- 在EN HS6-5-2C钢上使用电线电流加工 (WEDM) 的实验研究.
- 使用黄铜线电极进行全切和多切偏移切割.
- 使用扫描数字显微镜 (SDM) 检查表面完整性.
- 使用Taguchi方法进行数据分析和优化.
主要成果:
- 在完全切割和前两个偏移切割后,观察到最大的表面完整性缺陷.
- 对于130.0mm以上的材料厚度,记录了较低的SCD值.
- 峰值电流 (19A) 和放电持续时间 (32μs) 的增加导致了较高的SCD值 (0.005到0.0256μm·μm−2).
- 发现SCD和Ra都受到MTP的显著影响.
结论:
- 该研究成功地确定了MTP组合,使EN HS6-5-2C钢的WEDM中SCD和Ra最小化.
- 开发了数学回归模型来预测和最小化表面裂密度和粗度.
- 了解MTP的影响对于在WEDM中实现高质量的加工表面至关重要.
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