A general approach for tool wear prediction and machining parameter optimization for flat-nosed micro-milling

Abstract

The invention discloses a universal method for flat-end micro-milling cutter wear prediction and machining parameter optimization. The method comprises the following steps: step 1, respectively establishing a micro-milling cutter crescent pit wear model, a rear cutter surface wear model and a radial wear model containing unknown parameters according to micro-milling machining parameters, materialmachining performances and cutting lengths; step 2, respectively calibrating parameters in the micro-milling cutter wear model by adopting a numerical method according to the micro-milling cutter weardata obtained by the experiment; step 3, respectively substituting the calibrated parameters into the wear model to obtain a micro-milling cutter wear model, and realizing cutter wear prediction in the micro-milling process; and step 4,with overall minimization of crescent pit wear, rear cutter surface wear and radial wear as an objective function and the cutter blunt standard as a constraint condition, realizing the optimization of micro-milling machining parameters. According to the method, the cutter wear loss under the conditions of different parameters, different machining materials anddifferent cutting lengths can be predicted, and the universality and universality of the method for predicting the abrasion of the micro-milling cutter are remarkably improved.

Description

technical field [0001] The invention relates to the field of micro-milling processing, in particular to a general method for wear prediction and processing parameter optimization of flat-head micro-milling tools. Background technique [0002] With the adjustment of my country's industrial structure, CNC machine tools are currently developing in the direction of high precision, high speed and high efficiency, flexibility and intelligence. In the field of high-end precision manufacturing, such as the processing of many key parts in modern national defense equipment, the processing of aeroengine blades, reducers, crankshaft parts, etc., due to its complex structure, poor machinability of materials, and high precision requirements, traditional CNC When machine tools process such parts, the geometric accuracy and surface integrity are poor, and the quality is difficult to guarantee. [0003] Micro-milling has broad application prospects in the fields of micro and ultra-precision...

AI Technical Summary

Problems solved by technology

[0005] First of all, it is difficult to observe the wear state of the micro-milling cutter during the machining process, which makes it impossible to judge the remaining service life of the tool; secondly, most of the existing micro-milling wear prediction models / methods are aimed at a single processing material, and the models between different processing materials are not available. Versatility, lack of a unified universal wear prediction model / method; finally, most of the existing processing parameter optimization methods are qualitatively optimized through experiments based on the surface quality after processing, and there is still a lack of quantitative processing parameter optimization models

Images