Automatically-aligned numerical control cutting method for pre-printed image plate

A cutting method and technology for printing images, applied in automatic control devices, manufacturing tools, metal processing machinery parts, etc., can solve the problems of low processing accuracy and low precision, and achieve low hardware cost, high-precision cutting processing, alignment high precision effect

Inactive Publication Date: 2010-11-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

This method can adapt to the difference of the cut image within a certain similarity range, but due to the low accuracy of the existing contour recognition technology, the processing acc

Method used

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  • Automatically-aligned numerical control cutting method for pre-printed image plate
  • Automatically-aligned numerical control cutting method for pre-printed image plate
  • Automatically-aligned numerical control cutting method for pre-printed image plate

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[0030] The technical solution of the present invention will be described in detail below in conjunction with the drawings:

[0031] As attached figure 1 As shown, the present invention realizes the aligning of the pre-printed image plate numerical control cutting through the following steps:

[0032] A. Extract the outline of the image to be printed and generate the initial NC processing code according to the extracted image outline; specifically divided into the following steps:

[0033] A1. Binarize the image to obtain a preliminary figure outline;

[0034] In this embodiment, the maximum between-class variance method is used for image binarization according to the gray level of the image, and the Otsu method is used to select the binarization threshold;

[0035] The maximum between-class variance method and the Otsu method in this step are all existing technologies in the image processing field. For details, please refer to the literature (KAPUR J., SAHOP P., WONGA. A new method for ...

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Abstract

The invention discloses an automatically-aligned numerical control cutting method for a pre-printed image plate, which comprises the following steps of: A, extracting the profile of an image to be printed, and generating an initial numerical control machining code according to the extracted image; B, adding more than two identical identifying images at the blank of the periphery of the image to be printed; C, printing the image to be printed with the identifying images on the plate; D, clamping the pre-printed image plate obtained by the step C on a workbench of a numerical control cutting machine, and identifying the positions of the identifying images on a machine tool through a camera fixed on a main shaft of the numerical control cutting machine so as to establish the relation of conversion of coordinates between an image coordinate system and a cutting machine coordinate system; and E, editing the initial numerical control machining code obtained by the step A according to the relation of the conversion of coordinates obtained by the step D to obtain a directly-positioned numerical control machining code, so that the numerical control cutting machine cuts according to the obtained numerical control machining code. The automatically-aligned numerical control cutting method has the advantages of low hardware cost, simple and convenient operation and high alignment accuracy.

Description

technical field [0001] The invention relates to a numerical control cutting method, in particular to a numerical control cutting method with automatic alignment. Background technique [0002] Pre-printed image plate CNC cutting is to print the image on the flat plate in advance, and then cut the plate along the edge of the image outline on the machine tool to obtain a product whose shape is consistent with the outline of the printed image. This technology is practical and intuitive, and the processed products have the characteristics of beautiful appearance and strong three-dimensional effect, so it has demand and application in many fields, such as decorations, product packaging, advertising industry, etc. General plate cutting CNC machining usually first writes the CNC machining program code of the pattern or shape to be cut, and then fixes the plate blank on the machine tool and roughly determines the machining zero point of the part to process. Different from this kind ...

Claims

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Application Information

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IPC IPC(8): B23Q15/22
Inventor 刘胜兰张丽艳寿姜晔欧红旗杨博文
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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