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Method for positioning and monitoring wear of ball nose end mill cutter

A ball-end milling cutter, visual monitoring technology, applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing equipment, etc.

Inactive Publication Date: 2013-11-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the present invention proposes a ball-end milling cutter positioning and wear monitoring method, which solves the problem of tool positioning in the monitoring of milling cutter wear by visual means, completes the wear measurement of the milling cutter, and realizes the On-line monitoring of head milling cutter wear

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  • Method for positioning and monitoring wear of ball nose end mill cutter
  • Method for positioning and monitoring wear of ball nose end mill cutter
  • Method for positioning and monitoring wear of ball nose end mill cutter

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Experimental program
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Embodiment Construction

[0051] The specific implementation steps of the tool positioning and wear monitoring method in the ball end milling cutter wear monitoring proposed by the present invention will be further described below.

[0052] Step 1. Install the Vision Monitoring System

[0053] On the CNC machine tool, choose the edge of the machine tool that does not affect the normal milling process, and install the visual monitoring system at a place where the spindle can reach, including the camera bracket, CCD camera, lens and LED ring light source. The bracket is fixed on the machine tool by magnetic force. The camera It is fixed on the bracket and located under the main shaft, and the LED ring light source is installed in front of the lens, and the ring light source directly illuminates the ball end milling cutter during actual shooting.

[0054] Clamp the ball-end milling cutter on the machine tool, here is a right-handed ball-end milling cutter, move the spindle of the machine tool directly abo...

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Abstract

The invention discloses a method for positioning and monitoring wear of a ball nose end mill cutter and belongs to the field of monitoring wear of numerically-controlled milling cutters. The method is characterized by comprising the following steps: mounting a vision monitoring system on a numerically-controlled machine tool; collecting an image of the new ball nose end mill cutter prior to machining, pretreating the image, extracting data points on the cutting edge in the image, fitting the data points to obtain a straight line indicative of overall trend of the cutting edge, calculating the horizontal included angle of the straight line, rotating the new cutter image, and extracting the position of the cutter nose in the image after rotation; collecting an image of the worn cutter which maintains the same position and angle as those in the new cutter image; positioning circumferentially and positioning the cutter nose in the worn cutter image by use of the horizontal included angle and the cutter nose position, which are obtained by treating the new cutter image; and extracting current wear extent of the mill cutter. The invention is significant in that the method achieves the purpose of positioning the ball nose end mill cutter during the wear monitoring process of numerically-controlled milling cutters and completes on-line measurement of cutter wear.

Description

technical field [0001] The invention relates to the problem of tool positioning and wear measurement in machine vision-based ball end milling cutter wear monitoring in numerical control machining, and belongs to the field of tool wear monitoring. Background technique [0002] In the milling process, the wear of the tool has an important impact on the processing quality and efficiency, which directly hinders the further improvement of processing automation. The key to solving this problem lies in the development of tool wear monitoring technology. Tool wear monitoring can be divided into direct method and indirect method from the means of tool wear measurement. Generally speaking, the indirect method has strong real-time performance and can realize online synchronous monitoring. Commonly used indirect methods include cutting force method, machine tool power method, vibration method and acoustic emission method. The indirect method reflects the change of the amount of wear b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/09B23Q17/22B23Q17/24
CPCB23Q17/0904B23Q17/0995B23Q17/2457
Inventor 张臣张吉林张得礼周来水
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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