Method for near-net-shape machining of curved contours
AssigneeMTU Aero Engines AG
InventorMark Geisel
Life of this patent
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Abstract
A method relating to near-net-shape machining of curved contours such as those occurring, for example, in the fabrication of blades for propulsion engines and the like is described. Accordingly, the shape error in curve grinding is minimized by suitable compensation functions, in particular by interpolating and approximating cubic splines. The present method minimizes the number of tests required to set up a grinding machining operation and thus the number of semifinished products required to do so. At the same time, rejects in fabrication of curved workpieces are reduced by increasing the machining quality. The use of complex chucking devices is avoided and cutting performance is maximized.
Claims15
A method for machining a curved contour comprising the steps of:
- determining a deviation from a setpoint contour, the setpoint contour corresponding to a desired shape of a workpiece;
- determining a compensated path movement of a tool of a CNC machine tool based on the deviation;
- and
- machining the workpiece based on the compensated path movement to compensate shape errors.
A computer program product, comprising a computer usable medium having a computer readable program code embodied therein, the computer readable program code adapted to be executed to implement a method of machining a curved contour, the method comprising the step of:
- determining a deviation from a setpoint contour, the setpoint contour corresponding to a desired shape of a workpiece;
- determining a compensated path movement of a tool of a CNC machine tool based on the deviation;
- and
- machining the workpiece based on the compensated path movement to compensate shape errors.
Dependencies are inferred from the claim text.