难加工金属材料放电诱导可控烧蚀高效加工技术

发布时间：2018-02-11 20:26

  本文关键词： 难加工材料 电火花加工 放电诱导烧蚀 高效加工　出处：《航空制造技术》2016年22期 　论文类型：期刊论文

【摘要】：介绍了一种放电诱导烧蚀加工方法,即向加工区域可控地通入氧气,在电火花放电诱导作用下首先对加工材料进行活化,而后伴随着氧气的通入产生金属燃烧反应,利用金属燃烧释放的巨大化学能蚀除材料,从而大大提高材料去除率,并通过控制氧气及采用电火花修整以保障加工表面的质量。该加工方法与被加工材料的力学性能无关,仍然属于无宏观切削力方式,其克服了难加工材料机械加工困难及电火花加工效率受制于脉冲电源的难题,适合于"车、铣、钻、成形、打孔"等各种加工形式。该加工方法改变了难加工材料能进行加工的准则,实现了"能烧即能加工"。对淬火Cr12进行放电诱导烧蚀铣削加工,效率比传统电火花加工高10倍以上且表面质量相当;进行放电诱导雾化烧蚀深盲型孔加工,蚀除效率为电火花的5.45倍,最大加工深度达到132mm且还能继续加工。
[Abstract]:In this paper, a method of electric-spark induced ablation is introduced, in which oxygen is injected into the machining area, and the material is first activated under the action of electric spark discharge, and then the metal combustion reaction is produced with the oxygen flowing in. The material is corroded by the huge chemical energy released by metal combustion, which greatly improves the material removal rate, and ensures the quality of the machined surface by controlling oxygen and adopting EDM dressing. The processing method is independent of the mechanical properties of the processed material. It still belongs to the way of no macroscopic cutting force, which overcomes the difficulty of machining difficult materials and the difficulty of EDM being restricted by pulse power supply, which is suitable for "turning, milling, drilling, forming," The machining method has changed the criterion that difficult material can be processed, and realized "can be processed by firing as possible". The quenched Cr12 is processed by electric discharge induced ablation milling. The efficiency of EDM is more than 10 times higher than that of traditional EDM, and the surface quality is the same. The etch efficiency is 5.45 times of that of EDM, the maximum machining depth is 132mm and the machining can continue.
【作者单位】： 南京航空航天大学机电学院;
【分类号】：TG661
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本文编号：1503929