A method for monitoring tool breakage in CNC machine tool milling

A technology of milling processing and CNC machine tools, which is applied in the direction of program control, computer control, and general control systems, etc., and can solve problems such as safety accidents, damage to tool machine tools, and cutting processing.

Active Publication Date: 2016-02-24
WUHAN HENGLI HUAZHEN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the process of CNC cutting, the damage and failure of the tool is the main cause of machine tool equipment damage and cutting safety accidents

Method used

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  • A method for monitoring tool breakage in CNC machine tool milling
  • A method for monitoring tool breakage in CNC machine tool milling
  • A method for monitoring tool breakage in CNC machine tool milling

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Embodiment Construction

[0040] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0041] The tool breakage monitoring method provided by the present invention establishes a tool breakage monitoring model by obtaining the current signal of the machine tool spindle motor, preprocessing, and performing singular spectrum analysis and feature value extraction, so as to realize monitoring of the tool breakage state.

[0042] The invention monitors the damage of the cutter during multiple cutter damage experiments. Such as figure 1 Shown, the example of th...

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Abstract

The invention discloses a numerical control machine tool milling tool breakage monitoring method which includes the steps of obtaining a current signal of a motor of a machine tool main shaft, preprocessing the current signal, carrying out singular spectrum decomposition and characteristic value extraction on the preprocessed current signal to build a tool breakage monitoring model, achieving monitoring on the tool breakage state, and achieving the aim of predicting tool breakage through the current signal. The numerical control machine tool milling tool breakage monitoring method uses the current signal as the monitoring signal and has the advantages that the signal is easy to obtain, a sensor is low in cost and installation can be conveniently carried out. The singular spectrum decomposition can effectively extract ingredients, relative to the tool state, in the signal, and the singular spectrum decomposition is a decomposition method based on the signal internal structure, the calculating speed is high, and time is saved. The characteristic values are extracted based on the statistical method variance, can effectively reflect the tool breakage state, and have the advantages of being high in calculated speed. A support vector machine has multiple specific advantages in small sample recognition and non-linear pattern recognition, and the recognition preparation rate is high.

Description

technical field [0001] The invention belongs to the field of tool breakage monitoring for milling machining of numerical control machine tools, in particular to a tool breakage monitoring method for milling machining of numerical control machine tools, which provides online and real-time monitoring for tool breakage monitoring in actual machining. Background technique [0002] In the process of metal cutting, sometimes when the tool has not reached the blunt standard, or even before the tool has obvious wear, it loses its cutting ability. Usually, the damage caused by the abnormal wear of the tool is called tool damage. In order to ensure that the highly automated processing system can run continuously and efficiently, and to avoid damage to the workpiece or even the machine tool equipment due to the wear and tear of the cutting tool, it is often necessary to monitor the tool online. [0003] In the process of CNC cutting, the breakage and failure of the tool is the main cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4065
Inventor 李斌刘红奇毛新勇连凌能彭芳瑜毛宽民
Owner WUHAN HENGLI HUAZHEN TECH CO LTD
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