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- W2896412525 abstract "Many operators of laser cutting equipment use supersonic flow of a cut-assisting gas from a nozzle directed at the workpiece. This flow gives rise to shock-fronts which can cause large, localised variations in the effective gas pressure on the workpiece. This work has used pressure measurement techniques to investigate the variations in air-jet pressures. It is possible to identify the optimum value of parameters that will result in a high pressure on the workpiece. CO2 laser cutting trials demonstrate the strong correlation between the workpiece pressure and maximum cutting speed. The pressure measurements reveal the sensitivity of the flow pattern to nozzle damage and manufacturing variations. A simple nozzle ‘tool-setting’ and damage inspection technique is proposed. This technique is compatible with an industrial production environment.Many operators of laser cutting equipment use supersonic flow of a cut-assisting gas from a nozzle directed at the workpiece. This flow gives rise to shock-fronts which can cause large, localised variations in the effective gas pressure on the workpiece. This work has used pressure measurement techniques to investigate the variations in air-jet pressures. It is possible to identify the optimum value of parameters that will result in a high pressure on the workpiece. CO2 laser cutting trials demonstrate the strong correlation between the workpiece pressure and maximum cutting speed. The pressure measurements reveal the sensitivity of the flow pattern to nozzle damage and manufacturing variations. A simple nozzle ‘tool-setting’ and damage inspection technique is proposed. This technique is compatible with an industrial production environment." @default.
- W2896412525 created "2018-10-26" @default.
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- W2896412525 date "1984-01-01" @default.
- W2896412525 modified "2023-09-24" @default.
- W2896412525 title "Supersonic characteristics of nozzles used with lasers for cutting" @default.
- W2896412525 doi "https://doi.org/10.2351/1.5057628" @default.
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