Automatic measurement of spur gear dimensions using laser light, part 2: measurement of flank profile

Abstract

In part I of this study a laser-based system for automatic measurement of spur gears' tooth thickness and pitch was introduced. The developed system provides an inaccuracy value on the order of 5 m, and the measurement time, for all gear teeth, was just about 1 min. In this part the experimental work is further extended to measure the tooth flank profile of spur gears. Flank profile is one of the most important factors that affect gear performance. In gear meshing, motion is transferred through contact along gear flanks. Deviations in flank profile due to errors in manufacturing or nonuniform wear result in variations in gear movement. Measurement of the flank profile can help in adjusting the gear manufacturing process, control the quality of manufactured gears, and monitor the wear of gears during action. The proposed flank profile measurement system is based on the principle of optical triangulation. The flank profile measurement setup is integrated with that of the tooth thickness and pitch, and hence tooth thickness, pitch, and profile measurements are performed simultaneously, and the measurement time for the three parameters for all gear teeth remains less than 1 min. Software is developed to graph the actual tooth profile and evaluate its deviation from nominal shape. The flank profiles measured using the developed system are in good agreement with those obtained from a wellestablished measurement method. © 2005 Society of Photo-Optical Instrumentation Engineers.

Gear Shape Measurement Potential of Laser Triangulation and Confocal-Chromatic Distance Sensors

“…Frequently investigated measurement approaches for optical gear shape measurements are based on the principle of triangulation. In 2005, Younes et al presented an optical measurement approach for spur gear measurements with a point-by-point triangulation laser [ 9 ]. Because of the shading of adjacent teeth, the measurement does not cover the entire profile of the tooth flanks.…”

B4.3 - Optical Sensor system for 3D measurements on large gears

“…Younes et.al. refer to the fact that laser triangulation sensors can be used for measuring gears [13]. In their approach, the required measurement uncertainty is not achieved to evaluate the tolerances of the tooth deflections, which is justified by the fact that the position deviations of the component cannot be separated from the influence of the axis of rotation with only one fixed sensor.…”

Methodology for clamping load measurement of locking systems based on white light digitalization

“…Experimental measurement of the real clamping force after assembly allows to validate the theoretical calculations and to guarantee the proper design of the clip. To carry out such measurements and calculations different techniques can be used such as traditionally contact measurement methods [11], based on optical methods [12,13], or on tunneling effect [14]. This paper presents a new methodology of measurement of the clamping force to which a locking clip of a tensile luminary is subjected from the previous determination of its stiffness and the stretching it suffers under assembly and working conditions.…”