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为提高常规电火花深型孔加工的稳定性及工艺指标,提出了一种新的深型孔加工方法——放电诱导雾化烧蚀加工技术。采用“水基-氧气”高压气雾介质作为放电介质,对烧蚀燃烧反应具有冷却、抑制和分散放电作用,有效降低了烧蚀能量,保证了加工的平稳性。另外,放电间隙中分散的熔融金属与气雾介质的氧气继续充分燃烧,气雾介质吸收释放的能量而迅速气化,产生的爆炸效果对蚀除产物的排出有巨大的促进作用,蚀除产物呈现喷发式排出。因此,放电诱导雾化烧蚀深型孔加工技术不断引入了新的能量,并解决了排屑的难题。在本试验条件下,对于边长为4.4mm的方孔,加工深度可达70 mm以上,材料蚀除率约为内冲液电火花加工的5.45倍,电极质量相对损耗降低了82%。
In order to improve the stability and process index of conventional EDM deep hole machining, a new deep hole machining method - discharge induced atomization ablation processing technology was proposed. The use of “water-oxygen-based” high-pressure aerosol medium as a discharge medium has the effect of cooling, restraining and dispersing discharge on the ablation combustion reaction, effectively reducing the ablation energy and ensuring the processing stability. In addition, the molten metal dispersed in the discharge gap and the oxygen gas in the aerosol medium continue to be fully burned, and the aerosol medium absorbs the energy released and is rapidly vaporized. The explosion effect generated by the aerosol medium can greatly promote the removal of the products to be removed. Eruptive rendering. Therefore, discharge-induced atomization ablation deep hole processing technology continues to introduce new energy, and solve the problem of chip removal. Under the test conditions, the square depth of 4.4mm can reach 70mm or more, the material removal rate is about 5.45 times that of EDM, and the relative loss of electrode quality is reduced by 82%.