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Real-time monitoring system, device and method for tool breakage in machining process of numerical control machine tool

A technology for processing and CNC machine tools, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as high sensitivity and lack of real-time monitoring, achieve high signal stability, facilitate machine tool integration, and judge accuracy. high effect

Active Publication Date: 2021-01-22
西安精雕精密机械工程有限公司
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  • Abstract
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Problems solved by technology

[0010] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a real-time monitoring system, device and method for tool breakage in the machining process of CNC machine tools, so as to solve the problem of lack of real-time monitoring and high-sensitivity monitoring tool breakage methods in the prior art. technical problem

Method used

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  • Real-time monitoring system, device and method for tool breakage in machining process of numerical control machine tool
  • Real-time monitoring system, device and method for tool breakage in machining process of numerical control machine tool

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Embodiment Construction

[0038] The present invention is described in further detail below in conjunction with accompanying drawing:

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, and therefore cannot be construed as limiting the present invention; the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be construed as indicating or implying relative importance; in addition, unless otherwise Clearly stipulated and limited, the terms "installation"...

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Abstract

The invention discloses a real-time monitoring system, device and method for tool breakage in the machining process of a numerical control machine tool. The method comprises the following steps: carrying out differential processing on an accumulated pulse number collected by a collection grating ruler to obtain time domain data, carrying out Fourier transform on the time domain data, converting the time domain data into frequency domain data, extracting the amplitude of a feature frequency from the frequency domain data, comparing the amplitude with the reference threshold value to judge whether the cutter is short or not in order to monitor the cutter breaking condition of the cutter in real time with high sensitivity in the machining process. The current health state of the cutter can bemonitored in real time, the machining process does not need to be interrupted, and the production efficiency is not reduced. The judgment method is simple, reliable and high in judgment accuracy; andno additional sensor is needed, hardware cost is reduced, and integration with a machine tool is facilitated.

Description

【Technical field】 [0001] The invention belongs to the technical field of processing machine tools, and in particular relates to a real-time monitoring system, device and method for tool breakage during CNC machine tool processing. 【Background technique】 [0002] During the processing of CNC machine tools, due to unreasonable tool path, unstable cutting force, poor tool consistency, uneven workpiece material, tool aging, stress fatigue and other reasons, tool breakage is very easy to occur, especially in small diameter tools due to their low strength. Most common in high-speed machining. In addition, due to the small size of the tool, the small amount of cutting, and the influence of cutting fluid, it is impossible to judge whether the tool is currently in a healthy state through manual inspection, or through the change of cutting sound, which will affect the subsequent processing process and waste A lot of machining time, especially semi-finishing or finishing processes wit...

Claims

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Application Information

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IPC IPC(8): G05B19/4065
CPCG05B19/4065G05B2219/37616
Inventor 肖亮张亚龙刘茹顾远坤
Owner 西安精雕精密机械工程有限公司
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