A numerical control polishing method for the blade surface of the integral blisk

Abstract

The invention discloses a numerical control polishing method for the profile of a blade of an integrated blade disk. The method for selecting a polishing wheel, determining a polishing row pitch, planning a polishing route and making a program is adopted. The numerical control polishing method comprises steps of performing parametric modeling on the blade, partitioning the blade at equal intervals, fitting a line segment set and determining a polishing trace. The step of performing parametric modeling on the blade is performed in a direction vertical to a runner line; the step of partitioningthe blade at equal intervals is performed along the direction of the runner line, and a partitioning distance is a quarter of the diameter of the polishing wheel; partitioning points are interpolatedon each partitioning line of the profile of the blade at equal intervals; a distance between two adjacent position points is calculated by sequentially selecting two adjacent partitioning lines to obtain a fitted straight texture face; and the straight texture face produces an equal-interval face to determine the polishing trace. By the method, the characteristic of the profile of the blade is fitted fully, so that high contact between the polishing wheel and the profile of the blade is guaranteed; therefore, the precision of the profile of the blade of the integrated blade disk is ensured and the polishing efficiency of the integrated blade disk is improved.

Description

technical field [0001] The invention relates to a numerically controlled polishing method for the blade profile of an integral blisk, which belongs to the technical field of manufacturing and processing the integral blisk of an aero-engine. Background technique [0002] As we all know, the key issue in improving the performance and reliability of aero-engines lies in the manufacturing and processing technology of the blisk. The blade surface of the overall blisk is a free-form surface. Using a ball-end milling cutter to perform line cutting will inevitably form peaks and valleys, and because the cutter moves in the line cutting plane, the curvature of the trajectory curve is different and the positioning and other factors will inevitably lead to inter-line cutting. There is a large difference in the residual height of the blisk, so the blade surface of the blisk must be polished after milling. [0003] The complex structural characteristics and difficult-to-process material...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the prior art equipment that is relatively simple to use and not suitable for CNC polishing of the overall blisk blade profile; the manual operation polishing process is low in efficiency, the removal amount is uneven during the polishing process, and the accuracy is difficult to guarantee. The present invention provides a method for The CNC polishing method of the blade surface of the overall blisk, that is, the polishing method of fitting the ruled surface to approximate the blade surface, ensures good contact between the polishing wheel and the blade surface, and improves the polishing precision

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