Health evaluation method and system for key components and complete machine of numerical control machine tool and evaluation terminal

Abstract

The invention provides a health evaluation method and system for key components and a complete machine of a numerical control machine tool and an evaluation terminal. The system comprises a data acquisition and preprocessing module, a sample working condition identification module, a health index fusion module, an evaluation index mapping module, a baseline value construction and key component relative evaluation module and a complete machine health evaluation module. Based on cooperation of the above modules, through analysis of redundancy, relevance, sensitivity and stability of measuring point information, sensor selection and layout optimization are achieved, numerical control machine tool sensing information is obtained, and evaluation is conducted. The trend characteristics of the numerical control machine tool can be fused, evaluation indexes of the degradation state of the whole life cycle of the numerical control machine tool are reflected, the problem that the weights of front and back time sequence information are unbalanced due to the fact that the input information cycle is too long is effectively solved, and the health evaluation accuracy is improved. Health evaluation is carried out by establishing the baseline value, and the health evaluation precision of the key components and the complete machine of the numerical control machine tool is improved.

Description

technical field [0001] The invention relates to the technical field of numerically controlled machine tools, in particular to a key component of a numerically controlled machine tool and a health assessment method for the complete machine, a terminal and a readable storage medium. Background technique [0002] Numerical control machine tool (Computer numerical control machine tools), referred to as "CNC machine tool", 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. The emergence of CNC machin...

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Problems solved by technology

[0004] First of all, the state monitoring process of CNC machine tools is greatly affected by the coupling of working conditions, and the information collected by sensors is quite different under different working conditions. It is difficult to accurately evaluate the current state of the equipment, and the model identification effect is limited.

[0005] Secondly, for the collected vibration, temperature, current and other CNC machine tool information, the traditional data-driven health assessment model ignores the timing characteristics, cannot capture the time-varying information, and cannot accurately evaluate the state of the machine tool

[0006] Finally, the state monitoring process of CNC machine tools in the past often only carried out state monitoring on sensor information dimensions such as vibration, temperature, and noise, ignoring the representation of machining accuracy and machining efficiency in the health assessment of machine tools, and could not fully reflect the health of CNC machine tools

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