电加工过程蚀除机理的数学模型建立和提高机匣型面加工效率的工艺方法探讨

The mathematic model for EDM removal mechanism and the discussion for the EDM efficiency enhancement method of case profile

为提高GEAE高压涡轮机匣2060M40G04型面的电加工效率,解决镍基高温合金材料难加工问题,该文分别通过对石墨电极材料的应用和采用数控加工与电火花加工两种切削方式相结合的复合加工工艺方法的分析和试验过程的描述,得出采用石墨电极材料进行电加工,降低电极的消耗,提高加工效率。通过试验,铜电极加工时间为50h,石墨电极加工时间42h,加工效率提高16%;同时对复合加工方法的概念引入和应用,充分发挥每种切削方式的优点,相互取长补短,从而获得了综合性价比高、整体加工性能得到提升的优势。从试验数据看,单独采用数控加工,总切削时间为40h,单独采用电火花加工,总切削时间为81h,而采用复合加工,总切削时间为20h,加工效率提高50%。从而得出结论为单一简单型面可采用石墨电极材料进行电加工,对于复杂型面可采用复合加工进行电加工来提高工效。

In order to improve the EDM efficiency of GEAE part case,high pressure turbine statort2060 M40 G04 profile.Through the process method analysis and test process description of the application of graphite electrode material and compound machining method combined NC machine and EDM,this text got the point that adopt graphite electrode material to perform EDM can reduce the expense of electrode and enhance the efficiency that the machining time need 50 hours before improvement vs.42 hours after improvement,and the efficiency enhanced 16%.And another point is that the induce of compound machining method combined NC machine and EDM,get most use of merits of each method and draw on other’s strong points to offset one’s own weaknesses and gain the whole machining performance enhancement.From the test data,if only NC machining,40 hours was needed,and only EDM,81 hours was needed,but compound these two methods,only 20 hours was needed,the efficiency has enhanced 50%.And then get the conclusion that the graphite electrode material EDM can be adopted for single and simple profile and compound machining method can be adopted for complex profile machining to enhance the efficiency.