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A Laser Drilling Method Based on Point-Bright Spot-Guided Composite Holes

A laser drilling and composite hole technology, which is applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of difficult center positioning of the tip, unfavorable secondary drilling processing, and inability to process the tip of quasi-tapered holes. To achieve the effect of solving positioning difficulties

Active Publication Date: 2022-03-29
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, when the laser goes deep into the pre-indentation taper hole, the inside of the micro-hole cannot be effectively illuminated, and the positioning CCD magnification of the processing device cannot effectively identify the edge of the peripheral hole, the reference cannot be found, and the center of the tip is difficult to locate. Align the tip of the tapered hole for processing; after reducing the magnification, the resolution and positioning accuracy are not enough to find the tip of the tapered hole, and it is not conducive to accurately realize the laser secondary laser marking under the condition of tip alignment when the indenter has a certain tilt deviation Hole processing

Method used

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  • A Laser Drilling Method Based on Point-Bright Spot-Guided Composite Holes

Examples

Experimental program
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Effect test

Embodiment 1

[0020] as attached figure 1 As shown, an embodiment of the present invention provides a laser drilling method for composite holes based on tip bright spot guidance, and the laser drilling method for composite holes includes the following steps:

[0021] S101, using a diamond-made conical indenter to press the metal sheet to form a tapered blind hole on the metal sheet; the tapered blind hole is also called a quasi-preformed tapered hole;

[0022] S102, irradiating the tapered blind hole with ordinary lighting light, so that the tip of the tapered blind hole reflects light;

[0023] S103, according to the image processing function of the positioning CCD, through high-precision contour extraction, arc fitting, and center extraction image processing algorithms, identify the arc size of the light spot in the reflective area, and locate the geometric center of the light spot; the geometric center of the light spot is is the tip center of the tapered blind hole;

[0024] S104, ali...

Embodiment 2

[0027] as attached figure 1 As shown, an embodiment of the present invention provides a laser drilling method for composite holes based on tip bright spot guidance, and the laser drilling method for composite holes includes the following steps:

[0028] S101, using a sapphire conical indenter to press the metal sheet to form a tapered blind hole on the metal sheet; the tapered blind hole is also called a quasi-preformed tapered hole;

[0029] S102, irradiating the tapered blind hole with ordinary lighting light, so that the tip of the tapered blind hole reflects light;

[0030] S103, according to the image processing function of the positioning CCD, through high-precision contour extraction, arc fitting, and center extraction image processing algorithms, identify the arc size of the light spot in the reflective area, and locate the geometric center of the light spot; the geometric center of the light spot is is the tip center of the tapered blind hole;

[0031] S104, align t...

Embodiment 3

[0034] as attached figure 1 As shown, an embodiment of the present invention provides a laser drilling method for composite holes based on tip bright spot guidance, and the laser drilling method for composite holes includes the following steps:

[0035] S101, using a diamond-made conical indenter to press the steel plate to form a tapered blind hole on the steel plate; the tapered blind hole is also called a quasi-preformed tapered hole;

[0036] S102, irradiating the tapered blind hole with ordinary lighting light, so that the tip of the tapered blind hole reflects light;

[0037] S103, according to the image processing function of the positioning CCD, through high-precision contour extraction, arc fitting, and center extraction image processing algorithms, identify the arc size of the light spot in the reflective area, and locate the geometric center of the light spot; the geometric center of the light spot is is the tip center of the tapered blind hole;

[0038] S104, ali...

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Abstract

The present invention is applicable to the technical field of composite drilling, and provides a laser drilling method for a composite hole based on the guidance of the tip bright spot. The laser drilling method for the composite hole includes the following steps: printing a cone-shaped Blind hole; make the tip of the tapered blind hole reflect light, identify the arc size of the light spot in the reflective area, and locate the geometric center of the light spot; the geometric center of the light spot is the tip center of the tapered blind hole; align and position the laser center The center of the tip of the tapered blind hole, adjust the parameters, and process the straight hole at the tip of the tapered blind hole to realize the drilling of the compound hole. The present invention utilizes the guiding function of the bright spot at the tip of the tapered blind hole for positioning, and then processes the tip straight hole at the center of the tip to obtain the required composite hole, which effectively solves the difficulty in positioning the tip of the tapered hole when the composite hole is drilled by laser. , It is difficult to accurately punch compound holes, which has the advantages of convenience, speed and accuracy.

Description

technical field [0001] The invention belongs to the technical field of composite drilling, and in particular relates to a laser drilling method for composite holes guided by point bright spots. Background technique [0002] Laser drilling is the use of high-power-density laser beams to irradiate the processed material, so that the material is quickly heated to the vaporization temperature, and evaporates to form holes. Laser drilling is the earliest practical laser processing technology, and it is also one of the main application fields of laser processing. It is classified as laser removal in laser processing, also called evaporation processing. [0003] Although the laser drilling technology has many advantages, there are still technical difficulties for micro-holes with a large depth-to-diameter ratio, especially the micro-composite hole shape of tapered holes and pointed straight holes. The existing technology is to use a conical indenter to print a tapered hole, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/382B23K26/70
CPCB23K26/382B23K26/702
Inventor 石广丰于占江许金凯张景然李俊烨史国权赵伟宏
Owner CHANGCHUN UNIV OF SCI & TECH