Material Removal Rate Determination Based on a Laser Displacement Sensor

The non-contact measurement method was used to determine the parameters of the cut layer of material during grinding and other mechanical machining methods. One of these parameters is the specific grinding energy, which equals the ratio of grinding power to the material removal rate. The latter is determined by the cross-sectional area of the material layer being cut. The paper proposes a non-contact method for measuring instantaneous height parameters of the cross-section of the cut layer using a laser displacement sensor with subsequent determination of the cross-sectional area. This is relevant for defectless grinding implants and workpieces with free-form surfaces made of hard-to-machine materials. Studies have been carried out on the accuracy of non-contact measurement of instantaneous height parameters of the cross-section of the cut layer of material by comparing the obtained data with the results of contact measurement of standard block gauges. The developed non-contact distance measurement system has been shown to have a resolution of 0.01 mm with the same standard deviation regardless of the absolute value of the height parameters. The relative error of non-contact indirect measuring of the difference in the height parameters has been established.