Fault tree-based numerical control machine tool fault removal scheme judgment indication method

Abstract

The invention provides a fault tree-based numerical control machine tool fault removal scheme judgment indication method. According to the method, an input target character string used for describing a fault phenomenon is subjected to fault state description word extraction so as to search for potential target fault event nodes from a fault tree; various fault monitoring index parameters corresponding to potential fault bottom event nodes are compared with input various current running state parameters of a numerical control machine tool; potential fault bottom event nodes corresponding to obtained abnormal running state parameters are determined as confirmed fault bottom event nodes; fault removal scheme texts of corresponding fault types of the confirmed fault bottom event nodes are extracted according to a corresponding relationship in the fault types and used for indication, so that the fault type identification efficiency is improved, and the fault type possibility identification comprehensiveness and the fault type confirmation accuracy are ensured; and the method can be used for assisting in improving convenience of assisting in field repair or remote repair of the numerical control machine tool.

Description

technical field [0001] The invention belongs to the technical field of mechanical fault diagnosis and computer intelligent identification, and in particular relates to a fault tree-based method for identifying and indicating a fault elimination scheme of a numerically controlled machine tool. Background technique [0002] CNC machine tool is the abbreviation of Computer numerical control machine tools, which is an automatic machine tool equipped with a program control system. The control system can logically process programs with control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the numerical control device through the information carrier. After calculation and processing, various control signals are sent by the numerical control device to control the movement of the machine tool, and the parts are automatically processed according to the shape and size required by the drawing. CNC machine tools solve complex, prec...

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Problems solved by technology

[0004] (1) The number of CNC machine tools is huge, there are many varieties, and the workload of equipment maintenance and repair is heavy;

[0005] (2) CNC machine tools integrate machine, electricity, hydraulic and gas, and have high technical content. Once a failure occurs, it is difficult for CNC machine tool users to solve all their problems with their own technical strength

[0006] (3) The diagnosis of CNC machine tools largely depends on the experience and knowledge of maintenance personnel, and these empirical knowledge generally only exists in the brains of maintenance personnel, which is not conducive to the sharing of diagnostic knowledge. bottleneck of improvement

In this way, on the one hand, the after-sales service personnel of CNC machine tool manufacturers are exhausted, on the other hand, the waiting time for fault repair is also prolonged, and the processing and production of CNC machine tools are delayed.

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