Abstract
This paper describes basic phenomena and the characteristics of a new laser machining process - abrasive laser machining (ALM) in which a high speed abrasive particle jet is used to brake up and remove the molten material in the laser generated meltpool. The effects of machining conditions, such as abrasive material, particle injection angle, workpiece material, laser power density and traverse speed, are analysed in terms of material removal efficiency, surface roughness, hardness and characteristics of the heat affected zones (HAZ) for the machining of wide (2 - 4 mm width) grooves on mild steel, stainless steel and titanium alloy workpieces. Comparisons with the off-axial gas jet assisted laser machining under the same operating parameters are made. An increase in the material removal rate of up to 100% and a 15% reduction in the depth of HAZ, compared to the off-axial gas jet laser machining, are demonstrated. Also, a theoretical analysis of the effect of particle injection angles is given.This paper describes basic phenomena and the characteristics of a new laser machining process - abrasive laser machining (ALM) in which a high speed abrasive particle jet is used to brake up and remove the molten material in the laser generated meltpool. The effects of machining conditions, such as abrasive material, particle injection angle, workpiece material, laser power density and traverse speed, are analysed in terms of material removal efficiency, surface roughness, hardness and characteristics of the heat affected zones (HAZ) for the machining of wide (2 - 4 mm width) grooves on mild steel, stainless steel and titanium alloy workpieces. Comparisons with the off-axial gas jet assisted laser machining under the same operating parameters are made. An increase in the material removal rate of up to 100% and a 15% reduction in the depth of HAZ, compared to the off-axial gas jet laser machining, are demonstrated. Also, a theoretical analysis of the effect of particle injection angles is given.
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