Blade machining cutter compensation amount calculation method and system

Abstract

The invention discloses a blade machining cutter compensation amount calculation method, which comprises the following steps of: selecting a group of measurement points on a blade section line, and acquiring actual position data of each measurement point; fitting to obtain the location degree of the cross section corresponding to the cross section line; judging whether the location degree meets a tolerance requirement or not; calculating the error of each measuring point to obtain a group of error data, and calculating the kurtosis of the error data; performing statistical filtering on the error data to enable the kurtosis of the error data after statistical filtering to meet the requirement; judging whether the blade profile contour is qualified or not; calculating the variance of the error data meeting the kurtosis requirement; judging whether the variance meets a variance threshold value or not; and the cutter compensation amount is calculated according to the compensation coefficient and the mean value of the error data meeting the kurtosis requirement. According to the method, the blade machining state and the cutter compensation amount can be accurately obtained in the blade finish machining stage, and the production auxiliary time in the blade machining process can be remarkably shortened while the machining quality is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of milling, in particular to a method and system for calculating compensation amount of a blade machining tool. Background technique [0002] In the manufacturing process of blade parts, the core components of aero-engines, due to the complexity of the blade profile, craftsmen often need to use high-precision three-coordinate measuring machine (CMM) or on-machine measurement technology to obtain accurate blade profile measurement Data, and then by analyzing the blade measurement data and combining process experience, adjust the processing parameters and tool path programming method to complete the CNC milling of high-precision blades. [0003] The CNC milling of aero-engine blades often requires multiple rounds of measurement analysis and trial cutting iterations until the appropriate processing parameters are adjusted so that the finished blade meets the requirements for profile and position. Adjusting the...

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Problems solved by technology

[0004] Estimating the tool compensation amount by manually viewing the measurement report is a common method in actual production. However, due to the large amount of data and discrete values ​​in the blade profile measurement report, the original error data is not intuitive enough, which brings serious problems to the front-line processing and repair. There are a lot of inconveniences. First, the processing personnel are required to have rich process experience. Second, it takes a long time to manually analyze the data based on experience and the conclusions drawn are not universal. The empirical method is not easy to promote. Therefore, the estimated tool compensation There is also a large deviation in the amount

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