A Compensation Method for Blade Overcut of Ruled Surface Impeller

Abstract

The invention discloses a method for compensating for the overcutting of blades of ruled surface impellers, which comprises the following steps: through simple size chain calculation, the compensation is directly performed in NX software, and technicians are no longer required to manually adjust the shape of the ruled surface of the blade. The consistency and stability of the compensation has a direct impact on the size of the impeller; the size parameters of the blade are obtained by trimming the blade with a margin, and the overcut parameters near the leading edge and blade tip are calculated by reverse conversion of the parameters. Calculate the error angle, and finally compensate it into the size parameters of the tool, calculate the compensated CNC finishing program, and realize the size of the impeller blade is qualified. This method can solve the triangular area of ​​the leading edge close to the blade tip caused by the existing five-axis linkage overcut error.

Description

technical field [0001] The invention relates to the technical field of impeller blade disc processing, in particular to a compensation method for overcutting of ruled surface impeller blades. Background technique [0002] In the field of turbomachinery and aerospace, in order to pursue the high efficiency of compressor compression, the accuracy of the impeller blades is required to be higher and higher, so a large number of straight-grained impellers are designed and used, because the straight-grained impellers can use tapered balls The head milling cutter is processed and formed at one time. Compared with the free-form impeller, the processing efficiency is increased by more than 5 times. While the efficiency of the ruled surface impeller is improved, the dimensional requirements are not reduced. This puts forward higher requirements for five-axis machining and NC programming. Requirements, now with the help of intelligent CAM software, impeller machining can be realized, b...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a compensation method for the overcutting of the ruled surface impeller blades, so as to solve the overcutting error of the triangular area near the tip of the front edge caused by the five-axis linkage of the machine tool in the prior art, but it is difficult to correct , technicians manually adjust the shape of these surfaces, which is prone to some uncontrollable quality problems.

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