Application and evaluation of optical distance measurements in geometrical quality testing of microgears
- 57 Downloads
Microgears are increasingly important in industry. Compared to normal gears, the quality assurance of microgears needs more accurately measured data and simple but feasible measurement methods because of their dimension particularities, which are usually obtained with coordinate measuring systems. The disadvantages of this measurement technique are not only huge time and money consumption but also inconvenience due to the weight and dimension of the coordinate measuring machine (CCM). This paper proposes using an optical chromatic white light sensor CWL to scan the profile of microgear wheels instead of using a CMM. The possibility of calculating optimized positioning of the sensor is introduced; the principle of the measuring method and relevant calculations for generating the contour and analyzing theoretical errors are described. With the measured data, several exemplary geometrical deviations are shown and evaluated by comparing with the measurements from a CMM. Compared to the conventionally used methods, this method spends short time to conduct the geometrical measurement. Integrating this method into the test rig for functional testing, functional and geometrical testing can be conducted at once and, thus, save even more time.
Keywordsmicrogear optical distance measurement profile deviation CWL sensor micromechanical technology (MMT)
Unable to display preview. Download preview PDF.
- 1.Albers A, Burkardt N, Deigendesch T, Ellmer C, Hauser S. Validation of micromechanical systems. Microsystem Technologies, 2008, 14: 9–11Google Scholar
- 2.Albers A, Burkardt N, Becke C. Advantages of functional testing in quality assurance strategies for micro gears. In: Proceedings of HARMST International Conference, 2009Google Scholar
- 3.VDI 2731. Microgears — Basic principles, Part 1, 2009, 5–6Google Scholar
- 4.Fleischer J, Löhe D, Kotschenreuther J. Fertigungsverfahren in der mikrotechnik. Werkstattstechnik online Jahrgang 97, 2007, 847–851Google Scholar
- 5.Hauser S. Concepts for the Validation of Geometrical Features of Micro Gearings and Gear Boxes. Karlsruhe, 2007Google Scholar
- 6.Albers A, Burkardt N, Hauser S. Inspection of micro gear wheels with a modified tangential composite inspection. In: Proceedings of the 10th CIRP Conference on Computer Aided Tolerancing. Erlangen, Germany, 2007Google Scholar
- 7.DIN 3960. Definitions, parameters and equations for involute cylindrical gears and gear pairs, 1987Google Scholar
- 8.Lotze W. Gear Measurement with Coordinates Measuring Technology. 3rd ed. Dresden: Eigenverlag, 2006Google Scholar