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摘要
To increase the performance of discharge ablation, a sintered diamond (SD) electrode is used as a machining electrode to achieve machining combined with high-efficiency ablation and mechanical grinding in this paper. A new constant pressure servo control method based on the SD electrode is proposed by gathering the mechanical grinding force during machining. Using Cr12 as the workpiece, we conducted five groups of comparative experiments in this study. They are mechanical grinding with SD electrode, inner jetted dielectric electrical discharge machining (EDM) with copper electrode, aerosol ablation with copper electrode, aerosol ablation based on voltage control with SD electrode, and aerosol ablation based on constant pressure with SD electrode. In this paper, we studied the mechanism, machining efficiency, and machining quality. The method based on constant pressure servo control with SD electrode can effectively grind the oxide layer and ensure the sustainability of machining. From these five groups of experiments, we concluded that the method based on constant pressure servo control can be efficient and stable during machining. The machining efficiency was 6.3 times that of the inner jetted dielectric EDM. The machining efficiency based on constant pressure servo control increased by 88% compared with that of the aerosol ablation with copper electrode and it increased by 62% compared with that of the aerosol ablation based on voltage with SD electrode which showed that the grinding effect of diamond based on constant pressure servo control was obvious. Compared with the other four methods, the method based on constant pressure servo control can obtain the best surface quality.
- 出版日期2017-7
- 单位南京航空航天大学
