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Quantitative removal method of metal coating by multi-pulse laser ablation

A technology of laser ablation and metal cladding, applied in laser welding equipment, metal processing equipment, instruments, etc., can solve the problems of low efficiency, high cost, and difficult to accurately predict and control the amount of removal

Active Publication Date: 2015-12-30
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the removal amount is difficult to be accurately predicted and controlled when nanosecond-level multi-pulse laser ablates the metal coating on the surface of engineering plastics, and overcomes the low efficiency and high cost of the original repeated experiment method in engineering applications. High disadvantage

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  • Quantitative removal method of metal coating by multi-pulse laser ablation
  • Quantitative removal method of metal coating by multi-pulse laser ablation
  • Quantitative removal method of metal coating by multi-pulse laser ablation

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[0026] EXAMPLES The processing and experimental conditions are as follows: the metal coating is a 10 μm thick copper plating layer, the base material is polyimide, the wavelength of the laser light source is 532nm, the pulse width is 10ns, the repetition frequency is 10-40Khz, and the energy density is 0-70J / cm 2 . Feed speed 0-6m / min. The laser spot diameter is 40um. The specific implementation steps of the multi-pulse laser ablation metal coating quantitative removal method are as follows:

[0027] (1) Calculation of material thickness removed by a single pulse

[0028] Since the pulse action time emitted by the laser light source used is nanosecond level, the energy transfer is mainly heat transfer. The heat transfer between cladding metal and engineering plastic is difficult, depending on the heat penetration depth It is calculated that the thermal penetration depth of the pulsed laser energy in the copper layer is less than 2um, which is much smaller than the diamete...

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Abstract

The invention discloses a quantitative removal method for a multiple-pulse laser ablated metal coating, belongs to the technical field of numerical control laser processing, and relates to a method for quantitatively removing coating metal on the surface of engineering plastic in a numerical control laser processing process. The method comprises the following steps: obtaining a single-pulse laser ablation depth prediction model according to an energy conservation law and an ablation mechanism of nanosecond pulse laser and material effect; building a multiple-pulse laser ablation depth prediction model by analyzing a stacking process of laser pulses when multiple-pulse laser passes through a fixed-point position to determine a corresponding relation between the ablation depth and processing parameters, and controlling the removal quantity by adjusting the processing parameters. According to the method, the target material removal quantity in a nanosecond multiple-pulse laser ablation process is accurately controlled for the multiple ablation effects of the laser pulses in the same position during actual processing, non-uniform laser energy distribution characteristics and a processing process that laser spot positions always keep moving relative to a workpiece, so that the processing efficiency is improved and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of numerical control laser processing, and relates to a method for quantitatively removing the coating metal on the surface of engineering plastics in numerical control laser processing. Background technique [0002] After patterning and removing the metal cladding on the surface of engineering plastics, the manufacture of sensors, antennas and other parts can be realized, and multi-pulse laser processing is an effective manufacturing method for realizing such parts. Laser processing has the characteristics of many influencing factors, complex changes in material properties and shapes during processing, and short action time, which makes real-time monitoring difficult, making it difficult to accurately predict and control the processing results. When applying multi-pulse laser ablation to remove the metal coating on the surface of engineering plastics, it is necessary to completely remove the metal coating o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/36B23K26/362G06F19/00
CPCB23K26/36
Inventor 贾振元刘巍赵凯王泠丁立超
Owner DALIAN UNIV OF TECH
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