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Numerical control machine tool cutting tool wear state real-time monitoring method

A numerical control machine tool, wear state technology, applied in program control, computer control, general control system, etc., can solve the problems of troublesome sensor installation, difficult to popularize and apply, affecting the dynamic characteristics of machine tools, etc., to achieve small errors, good sensitivity and robustness. awesome effect

Active Publication Date: 2018-09-04
谷城万利铸造有限公司
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Problems solved by technology

[0004] The indirect measurement method indirectly monitors tool wear by monitoring acoustic emission signals, vibration signals, torque signals and other signals related to tool wear. It can generally achieve online real-time monitoring, but it is troublesome to install sensors, and even needs to change the structure of the machine tool. , affecting the dynamic characteristics of the machine tool, it is difficult to popularize and apply in actual production

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  • Numerical control machine tool cutting tool wear state real-time monitoring method
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  • Numerical control machine tool cutting tool wear state real-time monitoring method

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not 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.

[0026] figure 1 It is a flow chart of a real-time prediction method for the remaining life of a CNC machine tool constructed according to a preferred embodiment of the present invention, as figure 1 As shown, the object selected in this example is a CNC machining center, and the CNC system is Huazhong CNC HNC-818B. Implementation of the present invention comprises the following steps:

[0027...

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Abstract

The invention discloses a numerical control machine tool cutting tool wear state real-time monitoring method, which comprises the following steps: collecting sensor signals during machining of a numerical control machine tool in real time, and carrying out signal preprocessing; dividing the machining process into a plurality of working subintervals according to different machining tools, and extracting signal data during machining of each tool of the numerical control machine tool; calculating approximate entropy of the signal obtained during machining of each tool of the numerical control machine tool; and comparing the calculated approximate entropy of each tool and a preset threshold, and judging the tool wear state. The method has the advantages of needing no measuring equipment and needing no construction of an experiment platform, and is fast in prediction speed and high in accuracy; and meanwhile, the tool does not need to be assembled or disassembled, normal machining of the numerical control machine tool is not affected, and real-time monitoring of the wear state of the numerical control machine tool cutting tool can be realized.

Description

technical field [0001] The invention belongs to the technical field of wear measurement and monitoring of CNC machine tools, and more specifically relates to a real-time monitoring method for the wear status of cutting tools of CNC machine tools. Background technique [0002] With the development of the manufacturing industry, the application of CNC machine tools is more common. As the processing progresses, the CNC machine tools will inevitably wear out. With the accumulation of tool wear, it will affect the processing accuracy and lead to the generation of waste products. Real-time monitoring of tool wear status can effectively improve production efficiency and product qualification rate and reduce production costs. [0003] At present, the methods of tool wear measurement and monitoring mainly include direct measurement method and indirect measurement method. The direct measurement method directly recognizes the change of the appearance or surface shape of the tool throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/4065
CPCG05B19/4065G05B2219/37616
Inventor 陈国华向华周浩潘成龙李波胡勇文
Owner 谷城万利铸造有限公司
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