Vision-based tool breakage detection method and system

A detection method and detection system technology, applied in the direction of measuring/indicating equipment, metal processing equipment, metal processing machinery parts, etc., can solve the problems of spindle power not obvious, false alarms, etc., to improve the speed and detection efficiency of broken tools, The effect of improving the accuracy and improving the detection efficiency of broken knives

Active Publication Date: 2019-03-22
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

In addition to the tolerance, soft and hard properties of the machining blank, the temperature of the workshop, the thickness of the workshop floor and the shock resistance will all affect the waveform diagram, and for tools with small diameters, the change of the spindle power when the tool is broken is not obvious. The biggest problem with similar tool detection systems is false alarms

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  • Vision-based tool breakage detection method and system
  • Vision-based tool breakage detection method and system
  • Vision-based tool breakage detection method and system

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[0031] 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.

[0032] see figure 1 , the vision-based broken knife detection method provided by the present invention, the broken knife detection method mainly includes the following steps:

[0033] Step 1: Calibrate the ROI area of ​​the tool and initialize the count C=0. Specifically, see figure 2 and image 3 , in the actual processing process of the three-axis end milling machine, the worktable drives...

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Abstract

The invention belongs to the field of the correlation technique of intelligent numerical control machine tool detection, and discloses a vision-based tool breakage detection method and system. The method comprises the following steps that (1) calibration and initialization counting are carried out on an ROI area of a tool; (2) images of the tool and a workpiece are collected in real time, and theimages are sequentially subjected to gray level and binarization processing to obtain a binary image; (3) the binary image is subjected to masking, and only the binary image corresponding to the ROI area is preserved; (4) after the binary image is subjected to morphological processing, the binary outline of the binary image is extracted, and then the reference outline is obtained; and (5) whetherthe ratio between the area of the reference outline and the calibrated tool outline area is smaller than a first preset value or not is judged, and corresponding action is carried out according to thejudgment result. The vision-based tool breakage detection method and system are high in reliability and speed, low in cost, good in flexibility and high in adaptability.

Description

technical field [0001] The invention belongs to the technical field related to detection of intelligent numerical control machine tools, and more specifically relates to a method and system for detecting broken tools based on vision. Background technique [0002] At present, with the rapid development of industrial automation technology and the increase of labor costs, in the face of increasingly fierce competition, it has become an inevitable trend for enterprises to process products towards the goal of high efficiency, low cost, and one-time processing. The processing cycle is required to be shorter and shorter, and the processing cost of the product is required to be reduced as much as possible. The reliability of the production line is determined by the reliability of each sub-module. In order to ensure the reliable operation of the production line, each sub-module should send an abnormal signal to the monitoring system in time when an abnormal situation occurs, so that ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/09
CPCB23Q17/0957
Inventor 杨建中宋仕杰傅有向单奇武俊雄
Owner HUAZHONG UNIV OF SCI & TECH
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