整体叶轮展成电解精加工成型规律及运动设计

Shaping law and designing method of movement planning for precision electrochemical contour evolution machining of integral impeller

为提高整体叶轮精加工展成运动设计效率和加工精度,对精加工阴极表面进行离散化处理,研究其成型规律,建立了成型规律的数学模型,提出以叶片拟合型面母线的法向偏置线为基准进行展成运动轨迹设计.利用得到的数学模型对展成运动的合成进给速度进行优化设计,从而控制加工中去除材料的厚度.实验证明,以该数学模型为基础的展成运动设计方法可以精确地控制实际加工中去除材料的厚度,提高展成运动设计效率.

In order to improve the precision of machining and efficiency of cathode movement planning, the shaping law of tool-cathode for precision electrochemical contour evolution machining of integral impeller has been studied, and the mathematical model was established, the offset curves along the normal direction of vane transversal in fitting surface of impeller blade profile has been used to design the movement trajectory of contour evolution, cathode velocity along the trajectory have been designed according to the mathematical model. Then, the thickness of electrochemical solution could be controlled. The results of experiment shows that using the mathematical model and the designing method of movement planning can improve the productivity of movement planning in electrochemical contour evolution machining integral impeller.