Form quality dynamic identification and modification control method in machining process

Abstract

The invention discloses a form quality dynamical identification and modification control method in machining process. The form quality dynamical identification and modification control method in the machining process comprises the steps of (1) quality information real-time tracking, (2) form quality dynamic identification and (3) unusual form modification control, wherein the quality information real-time tracking is used for meeting the requirement that a large amount of bottom-layer data can reflect a present quality state of a workpiece form in the process of dynamic identification and modification, the form quality dynamic identification is used for carrying out data processing on acquired form quality information to acquire a dynamical quality product form, searching a form which is matched with the dynamical quality product form through an ergodic process form set and determining a belonging form type of the dynamical quality product form through similarity analysis, and the unusual form modification control is used for adopting a modification strategy ' deciding+choosing+calling' mechanism, dynamically carrying out modification control on a process exception form through a motion control unit and a motion executing mechanism. By the adoption of the form quality dynamical identification and modification control method in the machining process, the improvement of machining quality is benefited, the defects of quality is overcome in advance, quality cost is reduced, the improvement of production efficiency is benefited, off-line detection is avoided, sub-quality products can be machined again, and the economic benefit of an enterprise is improved.

Description

technical field [0001] The invention belongs to the field of dynamic quality control in the processing process, and relates to a dynamic identification and correction control method for the shape quality in the processing process. Background technique [0002] With the continuous improvement of market demand and various industries' requirements for processing quality, how to ensure high dimensional accuracy, high shape accuracy, and low surface roughness of the workpiece during processing to achieve "zero waste" has become a key issue in improving processing quality. The quality output of the machining process is affected by various process factors, such as machine tool geometry parameters, tool holder wear, various factors that cause thermal deformation and force deformation, etc. The influencing factors of the abnormal process and their complex interactions finally form the abnormal shape of quality characteristics, such as size error, shape error, etc. The morphological ...

AI Technical Summary

Problems solved by technology

Quality analysis mostly uses statistical process control to generate control charts and calculate process capabilities. It does not quantitatively divide and evaluate the quality feature forms of the processing process, and does not consider the dynamic identification of various workpiece forms formed by the combination of quality feature forms. A complete dynamic identification model of morphological quality; also does not give a clear and clear dynamic control process of morphological quality in the processing process

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