Abstract：Aero-engine turbine blade is the core part of the engine, and blade processing is usually based on blade tenon as the process datum, so the machining of blade tenon has a crucial impact on the whole blade. For the fillet of blade tenon side, now the common CNC processing technology in factories is: first in the multi-axis machining center for milling and then mechanical finishing. However, conventional multi-axis simultaneous milling has low efficiency, complex equipment and high processing cost. Therefore, based on the rectangular array CNC machine tool (3-axis simultaneous), this paper presents the process system of superhard abrasive grinding, polishing and rounding. Among, the combined process of NC grinding and polishing with superhard abrasive solves the problem of low machining efficiency and poor surface quality of inverted milling, and the accuracy of the rounded corner on the side of the mortise can be up to 20μm. The use of multi-spindle rectangular array CNC machine tool (3-axis simultaneous) greatly reduces the cost of equipment compared to the original multi-axis machining center, and the machining time of a single tenon side fillet is shortened within 180 seconds, laying a foundation for the use of more spindle machine tool rectangular array machining.
2020, 
