High-speed milling process parameter optimizing method based on dynamic model

Abstract

The invention relates to a high-speed milling process parameter optimizing method based on a dynamic model. The optimizing method includes 1) inputting structure parameter and initial cutting condition of a spindle-cutter system; 2) building a dynamic model of the spindle-cutter system, calculating a frequency response function of the cutter nose position according to the model and determining cutting force coefficient; 3) building a high speed spindle-cutter dynamic characteristic and milling interaction process model to obtain the characteristic equation of a closed loop dynamic milling system; 4) calculating a high-speed milling machining shimmy stability leaf picture; 5) selecting lathe spindle rotating speed and cutting depth to achieve high-speed milling parameter optimization with the lower bound curve of the high-speed milling machining shimmy stability leaf picture as the constraint condition and with maximum material removing rate as the optimization target. The method considers centrifugal force and gyroscopic couple effect of the cutter-cutter system in the high-speed rotating state, approaches actual work condition, improves accuracy of stability prediction, and provides effective technology for optimization of high-speed milling process parameter optimization.

Description

Technical field: [0001] The invention belongs to the field of mechanical processing, and relates to a milling process parameter optimization method, in particular to a dynamic model-based high-speed milling process parameter optimization method. Background technique [0002] High-speed cutting technology is widely used in the aerospace field, and has become an important way to improve processing efficiency and quality and reduce costs. At present, the reasonable selection of high-speed cutting parameters is still a difficult problem for enterprises. Most enterprises still rely on the trial cutting method to determine the cutting parameters during processing, and often cannot obtain the optimal combination of cutting parameters. Too conservative cutting parameters limit the performance of high-speed machine tools play and increase production efficiency. For example, in a domestic military factory, although they have purchased foreign advanced high-speed machine tools to proc...

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Problems solved by technology

Therefore, it does not reflect the real working conditions of high-speed milling

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