Method for estimating feasibility of substance removal

By using the heat conduction equation to estimate temperature rises and comparing them to vaporization energy references, the method efficiently determines whether substances on metal surfaces can be removed with laser irradiation, overcoming the time-consuming nature of experimental methods.

WO2025104799A1 Publication Date: 2025-05-22NT T INC
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Patent Information

Application Number
PCT/JP2023/040877
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-11-14
Publication Date
2025-05-22

AI Technical Summary

Technical Problem

Existing methods for determining suitable laser irradiation conditions for removing substances like rust, paint, and deposits from metal surfaces are time-consuming and require extensive experimental trial and error due to the numerous parameters involved.

Method used

A method that estimates the temperature rise near the laser irradiation point using the heat conduction equation for solids, comparing it to a reference temperature calculated by dividing the energy required to vaporize the substance by its heat capacity, to determine whether the substance can be removed.

Benefits of technology

This approach allows for the estimation of whether a substance can be removed through simple calculations, significantly reducing the time required to determine suitable laser irradiation conditions without the need for experimental trial and error.

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Abstract

In this method for estimating the feasibility of substance removal, the equation of heat conduction in solids is used to estimate a temperature rise in the vicinity of a laser irradiation spot for when a laser beam irradiates paint, rust, extraneous matter, etc. on the surface of a metal or other material, a hypothetical substance that is solid over the entire temperature range is introduced, and the temperature rise due to laser irradiation is determined on the basis of the temperature obtained by dividing the energy per unit mass required to vaporize the substance by the heat capacity per unit mass of the substance in the solid state.
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