整体叶轮数控展成电解加工运动轨迹及速度研究  

On Movement Path and Velocity of NC Electrochemical Contour Evolution Machining of an Integral Impeller

作　　者：吴建民[1] 徐家文[1] 

机构地区：[1]南京航空航天大学江苏省精密与微细制造技术重点实验室,南京210016

出　　处：《机械科学与技术》2008年第8期1089-1091,1096,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：十一五国防预研项目资助

摘　　要：在整体叶轮扭曲叶片型面加工方法中,数控展成电解加工展示了其优势。本文针对某型号航空发动机整体叶轮的加工,首先阐述了利用直纹面拟合扭曲型面的方法,然后通过对四轴数控展成电解加工过程的分析,采用不共原点的坐标变换对加工中的工件运动进行了研究,获得了各轴运动轨迹及工件上任意点的速度,分析了速度对展成电解加工间隙的影响,提出了编制数控加工程序的方法。最后,用试验对利用此法编制的数控加工程序进行了验证,试验结果表明该法能加工出符合要求的叶片型面。Aiming at the machining of the integral impellers of an aero engine, we first describe the fitting of a distotted blade surface with ruled surface. Then four-axis NC Electrochemical Contour Evolution Machining （NCECCEM） process is analyzed and the movement of the impeller is studied by using coordinate transformation without common origin of coordinate. The movement path of the four axes and the velocities of arbitrary points are obtained. In addition, the influence of velocity on the machining gap is studied. The method for designing the Numerical Control （NC） machining program is proposed. Finally, an application example is given to verify the above-mentioned method. Results indicate that the blades manufactured by this method are up to standard.

关 键 词：数控 展成 电解加工 整体叶轮 运动轨迹 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]