A general on-machine non-contact calibration method for milling cutter eccentricity parameters

Abstract

A universal on-machine non-contact calibration method for milling cutter eccentricity parameters. Firstly, a mathematical model representing the general geometric parameters of integral milling cutters and machine-clamp milling cutters is established, and then the tool rotation axis deflection, geometric axis deflection, and end edge eccentricity are used. 3 states and 7 independent parameters to quantitatively describe the eccentric state of the tool, and use the eddy current sensor to measure the target distance of the tool tooth section installed on the spindle of the machine tool non-contact, to obtain the different The change of the actual cutting radius of the cutting point at different axial heights of the blade, and then combined with the numerical optimization method, the tool eccentricity parameters (including the geometric axis deflection of the tool side edge, the deflection of the side edge rotation axis and the end Calibration of edge eccentricity). This method has good versatility and accuracy, and can realize rapid and accurate calibration of the tool eccentric state on the machine, which is convenient for use in the processing site of the enterprise.

Description

technical field [0001] The invention belongs to the technical field of high-precision numerical control milling, and in particular relates to a universal on-machine non-contact calibration method for milling cutter eccentricity parameters. Background technique [0002] Tool eccentricity, as a disturbing factor in the milling process, has become one of the main unfavorable factors affecting processing efficiency and quality. The phenomenon of tool eccentricity is very common in the process of machine tool processing. The main reasons for its occurrence are the non-ideal installation state of the spindle-tool holder-tool, the geometric error of the axis of the spindle system, the manufacturing error of the tool itself, and the wear of the cutting edge caused by the cutting process. , The flexible vibration characteristics of the spindle system during operation and other factors are caused. At present, with the continuous improvement of processing quality and efficiency requir...

AI Technical Summary

Problems solved by technology

These two methods use the milling force experimental test data to indirectly identify the tool eccentricity parameters, which cannot eliminate the impact of the vibration of the cutting link, and most of them only consider the offset in the geometric axis deflection of the tool side edge , the deviation of the geometrical axis of the side edge of the tool, the deviation of the rotation axis of the side edge of the tool, the eccentricity of the end edge of the tool, etc. are not considered too much

[0005] To sum up, the existing analysis methods and means for tool eccentricity factors are very limited, and it is difficult to conduct convenient and quantitative evaluation of tool eccentric state, which is not conducive to the realization of high-precision CNC milling.

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