Turbine blade exhaust side air film hole machining method

The invention relates to the technical field of turbine blade machining, in particular to a turbine blade exhaust side air film hole machining method. The air film hole is machined through a machine tool. The machine tool is provided with an electrode wire. A turbine blade comprises a convex surface and a concave surface, the concave surface and the convex surface define a first measurement pointand a second measurement point, respectively, the position where the turbine blade is located when the electrode wire touches the first measurement point is referred to as the first position, the position where the turbine blade is located when the electrode wire touches the second measurement point is referred to as the second position, and the machine tool machines the air film hole when the turbine blade is at the midpoint of the connection line between the first position and the second position. The machining method can automatically align the electrode wire with the middle position of thethickness direction of th