Aircraft structural part cutting parameter optimization method based on characteristics

Abstract

The invention discloses an aircraft structural part cutting parameter optimization method based on characteristics. The method provides a cutting parameter optimization model based on characteristics and gives full consideration to problems of clamping, feed strategies, characteristic types, characteristic structures and cutting strategies. The method uses a machine tool, a workpiece material and a cutter as restraints, uses efficiency, processing quality and cost as optimization goals, and uses rotating speed, feed, cutting depth and cutting width as optimization factors to build the model, and cutting parameter optimization is achieved through a genetic algorithm. The method can solve the problem that aircraft structural part processing parameters at present are too conservative, can greatly improve efficiency, and simultaneously can avoid the problem that deformation occurs easily during processing, the position of a thin wall vibrates easily, and the cutter can be bounced easily at the position of a corner.

Description

technical field [0001] The present invention relates to a method for optimizing machining parameters, especially a method for optimizing cutting parameters, specifically a feature-based method for optimizing cutting parameters of aircraft structural parts, involving genetic algorithms and neural network predictions, etc. It still belongs to the field of numerical control machining technology. Background technique [0002] Aircraft structural parts have the characteristics of large size, rich thin-walled structure, high dimensional accuracy and surface quality, and are also difficult to process. Due to the different size and rigidity of different features, the amount of cutting varies unevenly. In order to prevent processing problems, CNC technicians often choose relatively conservative cutting parameters, but in some features, quality problems may still occur due to improper cutting parameters, and seriously affect processing efficiency. Therefore, cutting parameters have b...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the optimization of existing cutting parameters is mostly based on material experiments and simulation optimization based on part level, so there is poor versatility, especially not suitable for the optimization of cutting parameters of aircraft structural parts, and to invent a method based on The feature-based cutting parameter optimization method for aircraft structural parts, which proposes a feature-based cutting parameter optimization model, predicts the limit cutting force of processing features based on neural network, as a constraint condition for cutting parameter optimization, and optimizes cutting parameters through genetic algorithm, which can Improve the current problem that the processing parameters of aircraft structural parts are too conservative, greatly improve the efficiency, and avoid problems such as easy deformation of processing, flutter at thin-walled parts, and knife snapping at corners

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