A chatter identification method in cutting machining based on generalized interval

Abstract

The invention discloses a cutting flutter identification method based on a generalized interval. The method includes the steps of acquiring cutting data in the cutting process to form a cutting signal data set, performing interval processing on the cutting signal data set to acquire a data set in the generalized interval, extracting a characteristic quantity set in the generalized interval of the data set, building an initial generalized neural network model, coding cutting states to form an ideal goal output by a generalized neural network, training the generalized neural network, acquiring an optimized generalized neural network model, substituting the characteristic quantity set in the generalized interval of the cutting data set to be identified into the optimized generalized neural network model, and calculating output results of the model, wherein the state corresponding to the maximum value in the interval of the output results is the identified cutting state. The method can monitor and identify cutting flutters in real times, thus performs necessary control over cutting parameters and cutting tools, and meets manufacturing requirements.

Description

technical field [0001] The invention relates to the field of engineering state identification in mechanical processing, in particular to a real-time identification method for cutting vibration. Background technique [0002] The chatter problem is an inevitable problem in the cutting process. Cutting chatter is caused by the dynamic periodic force excitation generated in the cutting process, and can maintain its vibration without attenuation. The chatter problem is one of the key technical issues that affect the processing quality of mechanical products and the cutting efficiency of machine tools. The existence of chatter reduces the surface quality of the product, also reduces the production efficiency and the life of the tool and equipment, and increases the consumption of materials and energy. At the same time, the noise generated by flutter will induce cardiovascular and other systemic diseases of people who work in this environment for a long time, and seriously endang...

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Problems solved by technology

However, the theoretical literature on generalized intervals is mostly found in mathematical reasoning, and rarely seen in solving problems in combination with practical engineering problems

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