To realize the demand of processing the air film hole of aviation turbine blade without metamorphic layer, the EDM–drilling combined machining system was developed. According to the demand of the system mentioned above, to work and control in coordination with two axes, system architecture needed to be designed and optimized, which ensures that EDM and drilling operate independently of each other. Meanwhile, the system can realize automatic control of motor spindle speed and the stepless adjustment of feed rate. Based on the combined machining system, a processing technology of micro-hole composite without metamorphic layer was developed. During the processing, firstly, a micro-hole was processed by EDM. In order to removal the metamorphic layer on the hole wall completely, where the hole needed reaming with drilling tool. The basis of the technology mentioned above, a series of compound processing experiments of straight hole and 20° inclined hole were carried out. The tolerance range is (0.315±0.003) mm. The experimental results show that the EDM–drilling composite machining has the advantages of high machining efficiency, high hole shape accuracy and no metamorphic layer on the hole wall.
罗学科,李若冰,刘建勇,李殿新,杨晓宇,寇鹏远,刘家豪,叶志杰. 微小孔电火花–钻削无变质层复合加工技术研究[J]. 航空制造技术, 2023, 66(19): 41-47.
LUO Xueke, LI Ruobing, LIU Jianyong, LI Dianxin, YANG Xiaoyu, KOU Pengyuan, LIU Jiahao, YE Zhijie. Research on EDM–Drilling Combined Machining Technology of Micro-Hole Without Metamorphic Layer[J]. Aeronautical Manufacturing Technology, 2023, 66(19): 41-47.