Machining process method for single-face complex cavity large-size part

The invention relates to a machining process method for a single-face complex cavity large-size part. A plane subjected to workblank milling first is adopted, the thickness of only one face of a workblank is milled, the thickness of a milling square is one third that of a vertical rib of a part single-face cavity, and deformation generated after a part is machined can be eliminated. 本发明涉及种单面复杂型腔大尺寸零件的机械加工工艺方法，采用先进行铣毛坯的平面，而且是进行只铣面毛坯的厚度，铣方的厚度为零件单面型腔立筋厚度的三分之，可以消除零件在加工完成之后产生的变形。