CN-121972794-A - Roll-to-roll laser cutting method of pure glue and conductive glue for flexible circuit board

CN121972794ACN 121972794 ACN121972794 ACN 121972794ACN-121972794-A

Abstract

The invention discloses a roll-to-roll laser cutting method of pure glue and conductive glue for a flexible circuit board, which relates to the technical field of laser cutting and comprises the following steps of obtaining an image of the pure glue or the conductive glue after primary cutting, and marking the image as a real-time glue image; the method comprises the steps of obtaining a real-time segmentation threshold value based on a real-time glue image, obtaining a real-time uncut area based on the real-time segmentation threshold value, obtaining a real-time reference value based on the real-time uncut area, obtaining a historical normal laser intensity based on the real-time reference value, obtaining a repeated-scanning energy threshold value based on the historical normal laser intensity, obtaining a repeated-scanning energy function based on the repeated-scanning energy threshold value, obtaining real-time repeated-scanning energy based on the real-time reference value and the repeated-scanning energy function, and performing repeated-scanning deburring on pure glue or conductive glue based on the real-time repeated-scanning energy.

Inventors

WU XIPENG
WANG ZHENHUA
ZHU XIAOBAO

Assignees

深圳市盛鸿运科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260327

Claims (10)

1. The roll-to-roll laser cutting method of the pure glue and the conductive glue for the flexible circuit board is characterized by comprising the following steps of: acquiring an image of the pure glue or the conductive glue after primary cutting, and marking the image as a real-time glue image; acquiring a real-time segmentation threshold value based on the real-time glue image; acquiring a real-time uncut region based on a real-time segmentation threshold; acquiring a real-time reference value based on the real-time uncut region; acquiring historical normal laser intensity based on the real-time reference value; Acquiring a re-sweeping energy threshold based on the historical normal laser intensity; acquiring a re-sweeping energy function based on the re-sweeping energy threshold; And acquiring real-time re-sweeping energy based on the real-time reference value and the re-sweeping energy function, and re-sweeping and deburring the pure adhesive or the conductive adhesive based on the real-time re-sweeping energy.
2. The roll-to-roll laser cutting method of pure and conductive adhesive for flexible circuit board according to claim 1, wherein the acquiring of the real-time segmentation threshold based on the real-time adhesive image comprises the following sub-steps: graying the real-time glue image to obtain a gray scale image, and marking the gray scale image as the real-time glue gray scale image; and marking the gray value of the pixel point in the real-time glue gray image as the real-time glue gray value.
3. The roll-to-roll laser cutting method of pure and conductive adhesive for flexible circuit board according to claim 2, wherein the acquiring of the real-time segmentation threshold based on the real-time adhesive image further comprises the sub-steps of: Dividing the gray value range of 0 to 255 into a first number of equally spaced intervals, labeled as range division intervals; acquiring the number of real-time glue gray values in each range dividing interval, and marking the number as the frequency in the interval; Taking the gray value of the real-time glue as an X-axis value, the frequency in the interval as a Y-axis value, drawing a histogram in the interval with the range division interval as a histogram, and marking the histogram as a gray distribution histogram; Marking a range division interval which is larger than the interval frequency of the left side and the right side as a first acquisition interval in the gray distribution histogram; Marking the intermediate value of the first acquisition interval as a first interval representative value; marking a first acquisition interval corresponding to the minimum first interval representative value as a second acquisition interval; Marking a first acquisition interval corresponding to the largest first interval representative value as a third acquisition interval; a range dividing interval with the minimum frequency in the acquisition interval is marked as a final threshold interval between the second acquisition interval and the third acquisition interval; And acquiring an intermediate value of the final threshold interval, and marking the intermediate value as a real-time segmentation threshold.
4. The roll-to-roll laser cutting method of pure and conductive adhesive for flexible circuit board according to claim 3, wherein the acquiring of the real-time uncut area based on the real-time segmentation threshold comprises the following sub-steps: Marking the real-time glue gray value which is larger than or equal to the real-time segmentation threshold value as a real-time uncut gray value; and the continuous area formed by the pixel points corresponding to the real-time uncut gray values is marked as a real-time uncut area.
5. The roll-to-roll laser cutting method of pure and conductive adhesive for flexible circuit board according to claim 4, wherein the obtaining of the real-time reference value based on the real-time uncut area comprises the following sub-steps: Acquiring a path area of primary laser cutting in a real-time glue image, and marking the path area as a laser path area; Acquiring an intersecting area of the laser path area and the real-time uncut area, and marking the intersecting area as a real-time burr area; And acquiring the ratio of the area of the real-time burr area to the length of the laser path, and marking the ratio as a real-time reference value.
6. The roll-to-roll laser cutting method of the pure and conductive adhesives for the flexible circuit board according to claim 5, wherein the step of acquiring the historical normal laser intensity based on the real-time reference value comprises the following sub-steps: Acquiring real-time reference values of different pure adhesives or conductive adhesives after primary cutting, and marking the real-time reference values as historical reference values; the laser intensity which can be normally deburred under the same historical reference value is marked as the historical normal laser intensity.
7. The roll-to-roll laser cutting method of the pure and conductive adhesives for the flexible circuit board according to claim 6, wherein the step of obtaining the re-sweeping energy threshold value based on the historical normal laser intensity comprises the following sub-steps: Acquiring a second number of historical normal laser intensities under the same historical reference value; the method comprises the steps of establishing a plane rectangular coordinate system by taking historical normal laser intensity as horizontal axis data and the number of the historical normal laser intensities as vertical axis data, and marking the plane rectangular coordinate system as an energy threshold coordinate system; Acquiring all historical normal laser intensities and coordinate points with the corresponding quantity of the historical normal laser intensities being respectively an abscissa and an ordinate, and marking the historical normal laser intensities as intensity distribution coordinate points; all intensity distribution coordinate points are plotted in an energy threshold coordinate system.
8. The roll-to-roll laser cutting method of pure and conductive adhesive for flexible circuit board according to claim 7, wherein the obtaining of the re-sweeping energy threshold based on the historical normal laser intensity further comprises the sub-steps of: setting a first data length, establishing a rectangle which is provided with the first data height and the first data length on the horizontal axis of an energy threshold coordinate system, can move left and right and is marked as a threshold judgment rectangle; marking the number of the real-time history normal laser intensities in the threshold judgment rectangle as the rectangle judgment number; When the historical normal laser intensities are uniformly distributed, acquiring the average number of the historical normal laser intensities in each threshold judgment rectangle, and marking the average number as the average number of the rectangles; setting a smaller number proportion, and marking the product of the average number of the rectangles and the smaller number as a smaller distribution threshold value; And (3) translating the threshold judgment rectangle from the leftmost side of the energy threshold coordinate system to the right, stopping moving the threshold judgment rectangle when the judgment number of the rectangles is larger than or equal to the less distribution threshold, and acquiring the historical normal laser intensity corresponding to the minimum abscissa of the threshold judgment rectangle at the moment, and marking the historical normal laser intensity as the re-sweeping energy threshold.
9. The roll-to-roll laser cutting method of pure and conductive adhesive for flexible circuit board according to claim 8, wherein obtaining the re-sweeping energy function based on the re-sweeping energy threshold comprises the following sub-steps: acquiring a repeated scanning energy threshold value corresponding to each historical reference value; establishing a plane rectangular coordinate system by taking a historical reference value as horizontal axis data and a repeated scanning energy threshold value as vertical axis data, and marking the plane rectangular coordinate system as an energy threshold value coordinate system; taking the historical reference value and the repeated scanning energy threshold corresponding to the historical reference value as an abscissa and an ordinate of a coordinate point respectively, and marking the coordinate point as an energy threshold coordinate point; Drawing all the energy threshold coordinate points in an energy threshold coordinate system; and performing function fitting on all the energy threshold coordinate points to obtain a function, and marking the function as a complex scanning energy function.
10. The roll-to-roll laser cutting method of pure and conductive adhesives for flexible circuit boards according to claim 9, wherein the obtaining of the real-time re-sweeping energy based on the real-time reference value and the re-sweeping energy function, and the re-sweeping deburring of the pure or conductive adhesives based on the real-time re-sweeping energy comprises the following sub-steps: Substituting the real-time reference value as the horizontal axis value into the re-scanning energy function to obtain a function value, marking the function value as the real-time re-scanning energy, enabling the energy of laser to be the real-time re-scanning energy, and then re-scanning and deburring the pure adhesive or the conductive adhesive.

Description

Roll-to-roll laser cutting method of pure glue and conductive glue for flexible circuit board Technical Field The invention relates to the technical field of laser cutting, in particular to a roll-to-roll laser cutting method of pure glue and conductive glue for a flexible circuit board. Background In the field of flexible electronic manufacturing, a flexible circuit board is used as a core substrate of a connecting and bearing element, the processing precision and the reliability of the flexible circuit board directly determine the performance of a terminal product, pure glue and conductive glue are key materials in the flexible circuit board, and the technical problems of roll-to-roll laser cutting of the pure glue and the conductive glue always exist, namely the generation and the control of burrs at the edge of a kerf; The existing deburring heavy cutting technology is characterized in that burrs are identified, secondary cutting is conducted, energy parameters of the secondary cutting depend on fixed experience values or manual debugging, dynamic self-adaptive adjustment cannot be conducted according to the sizes of the burrs, if the energy of cutting is too small, the deburring effect is poor, if the energy is too large, energy waste is caused, even heat damage is easily caused to pure rubber and conductive rubber, namely the deburring energy of the existing laser cutting technology is set and fixed, and the deburring effect is poor. Disclosure of Invention The invention aims to solve at least one of the technical problems in the prior art to a certain extent, and aims to solve the problems that the deburring method is poor in deburring effect caused by fixed energy setting of deburring in the existing laser cutting technology by acquiring an image of pure glue or conducting glue after primary cutting and marking the image as a real-time glue image, acquiring a real-time cutting threshold value based on the real-time glue image, acquiring a real-time uncut area based on the real-time cutting threshold value, acquiring a real-time reference value based on the real-time uncut area, acquiring a historical normal laser intensity based on the real-time reference value, acquiring a re-sweeping energy threshold value based on the historical normal laser intensity, acquiring a re-sweeping energy function based on the re-sweeping energy threshold value, acquiring real-time re-sweeping energy based on the real-time reference value and the re-sweeping energy function and re-sweeping deburring pure glue or conducting glue based on the real-time re-sweeping energy. In order to achieve the above purpose, the application provides a roll-to-roll laser cutting method of pure glue and conductive glue for a flexible circuit board, comprising the following steps: acquiring an image of the pure glue or the conductive glue after primary cutting, and marking the image as a real-time glue image; acquiring a real-time segmentation threshold value based on the real-time glue image; acquiring a real-time uncut region based on a real-time segmentation threshold; acquiring a real-time reference value based on the real-time uncut region; acquiring historical normal laser intensity based on the real-time reference value; Acquiring a re-sweeping energy threshold based on the historical normal laser intensity; acquiring a re-sweeping energy function based on the re-sweeping energy threshold; And acquiring real-time re-sweeping energy based on the real-time reference value and the re-sweeping energy function, and re-sweeping and deburring the pure adhesive or the conductive adhesive based on the real-time re-sweeping energy. Further, the step of acquiring the real-time segmentation threshold value based on the real-time glue image comprises the following sub-steps: graying the real-time glue image to obtain a gray scale image, and marking the gray scale image as the real-time glue gray scale image; and marking the gray value of the pixel point in the real-time glue gray image as the real-time glue gray value. Further, the method for acquiring the real-time segmentation threshold value based on the real-time glue image further comprises the following sub-steps: Dividing the gray value range of 0 to 255 into a first number of equally spaced intervals, labeled as range division intervals; acquiring the number of real-time glue gray values in each range dividing interval, and marking the number as the frequency in the interval; Taking the gray value of the real-time glue as an X-axis value, the frequency in the interval as a Y-axis value, drawing a histogram in the interval with the range division interval as a histogram, and marking the histogram as a gray distribution histogram; Marking a range division interval which is larger than the interval frequency of the left side and the right side as a first acquisition interval in the gray distribution histogram; Marking the intermediate value of the first acquisition interval as a first inte