YG6硬质合金微细异形锥孔电火花加工工艺OA
Process Research of YG6 Cemented Carbide Micro Special-shaped Tapered Holes by Electrical Discharge Machining
为改善 YG6 硬质合金微细异形锥孔电火花加工效果,解决电极损耗严重、加工表面质量差等问题,提出一种首先预置底孔、然后成型加工的新工艺.首先,对材料电蚀颗粒的尺寸分布进行了检测;其次,结合流体力学理论进行了建模分析,确定了预置底孔的尺寸参数;最后,对新工艺和传统一次成型工艺的结果进行了对比.结果表明:当电极的转速为 100 r/min 时,新工艺的加工效率最高,并且比传统工艺的加工效率提高了25.45％;在该转速下,电极长度损耗率平均减少 19.57％,锥度损耗率平均减少4.97％,加工表面的平均粗糙度 Ra 控制在0.2 μm 以内.首先预置底孔、然后成型加工的工艺方案在微细异形锥孔电火花成型加工上取得了很好的效果.
In order to improve the electrical discharge machining(EDM)of YG6 cemented carbide micro special-shaped tapered holes and address issues of severe electrode wear and poor surface quality,this paper proposes a novel process:Prefabricating a bottom hole followed by final forming.Firstly,the size distribution of eroded particles was examined.Then,based on fluid dynamics theory,a model was established to determine the optimal bottom hole dimensions.Finally,the novel process was compared with the conventional one-step forming method.Results show that at an electrode rotation speed of 100 r/min,the new process achieves peak efficiency,25.45％higher than the traditional method.At this speed,average electrode length wear rate decreases by 19.57％,average taper wear rate decreases by 4.97％,and machined surface roughness is controlled within Ra=0.2 μm.The strategy of prefabricating a bottom hole prior to final shaping proves highly effective in the EDM of micro special-shaped tapered holes.
李东晖;李殿新;刘建勇;徐铭成;黄一敏
北京石油化工学院 机械工程学院,北京 102617北京石油化工学院 机械工程学院,北京 102617北京石油化工学院 机械工程学院,北京 102617北京石油化工学院 机械工程学院,北京 102617北京石油化工学院 机械工程学院,北京 102617
矿业与冶金
硬质合金电火花加工微细异形锥孔电极损耗表面粗糙度
cemented carbideelectrical discharge machiningmicro special-shaped tapered holeselectrode wearsurface roughness
《机械科学与技术》 2026 (7)
1136-1143,8
国家重点研发计划(2023YFB4605900)与京津冀科技创新协同专项(Z251100005225003)
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