Application of POWERMILL in NC programming of aeroengine integral impeller (2


3 processing arrangement

(1) Clamping: using mandrel clamping positioning, it is also conceivable to make a keyway on the blank for auxiliary positioning, and to make special tooling suitable for the positioning of the mandrel;

(2) Finding the right one: use the table to find the right or use the edge finder.


Figure 2 Five-axis automatic avoidance programming

4 roughing flow section

(1) Adopt 3+2 positioning five-axis machining to minimize the number of linkage axes and improve the stability of machining. Use the three-dimensional area to remove the strategy, the roughing allowance is O.5mm, the lower cut is 3mm, the spindle speed is 8OOOr/min, and the feed speed is 1200mm/min. It adopts racing track processing, smoothing the balance, and the undercut method is spiral, which fully utilizes the efficiency of high-speed machining.

(2) In the narrow flow path, 3+2 positioning five-axis machining can also be used, and the five-uranium linkage method can also be considered. The advantage is that it can leave a more uniform margin for subsequent processing. The disadvantage is cutting during linkage. It is better to stabilize the five axes.

5 roughing blades

Selecting the blades to be roughed, PowerMILL will automatically determine the direction of the tool axis and automatically avoid the interference of the blades next to it.

6 Perform reasonable artificial aging

It can be used for stress aging treatment, which can change the chemical composition of the surface of the workpiece, and impart or improve the performance of the workpiece to improve the intrinsic quality of the workpiece.

7 secondary roughing

The semi-finished flow path part is processed by five-axis linkage, leaving a margin of O.2mm, which gives a more uniform margin for finishing, ensuring stable cutting of subsequent machining. In this processing, a curved projection strategy is adopted.

8 Semi-finished blades

Using the SWARF machining method, the cutter axis is automatically judged, leaving a margin of O.15mm, leaving a more uniform allowance for finishing, ensuring stable machining and subsequent cutting.

9 finishing flow path

Using the surface projection method, attention should be paid to the latitude and longitude distribution of the surface and the projection quality of the surface, which will directly affect the quality of the tool path and the surface quality of the surface.


Figure 3 Five-axis collision simulation

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