An Evaluation Method for Brittle Source of the Key Procedure in Complex Parts’ Manufacturing

Table 2

Machining tasks of a blade.

Task	Machining task	Machining method	Accuracy class	Surface roughness Ra/m	Note
R6	Blade top craft station	Milling	IT10	3.2	Poor milling, CNC machining, special fixtures
R7	Blade dorsal positioning surface	Milling	IT10	3.2	Four-axis CNC machining, special fixtures
R8	Tenon root	Wire cutting	IT10	3.2	CNC wire-cutting machine, special fixtures
R9	Positioning holes of craft station	Drilling	IT9	3.2	Four-axis CNC machining, special fixtures