| With the rapid development of ceramic tile industry,the quality of ceramic tiles has greatly improved.But the coming problem is that the traditional measurement system falls behind the modem development.According to GB/T 3810.2-2016 on the measurement of size and surface quality of ceramic tiles,there are two problems.One is that the tile needs to be rotated several times to obtain all error parameters during the measurement.The other is that due to the positions of the support points,some of tiles had comparatively large deformation.The systematic errors would be brought by the gravity deformation even led to measurement failure due to instability.This paper presents a new method of the measurement of ceramic tiles to solve the problems mentioned above.Firstly,coordinate method is used to calculate all geometrical parameters based on an automatic measuring model.Secondly,the finite element simulation is applied to build a 3D ceramic tile model to solve the best three support points which minimizes the systematic error caused by the gravity deformation.Lastly,in the case of the completion of the overall mechanical design,the construction and adjustment of the ceramic geometrical parameter measuring instrument are completed,and the experimental verification is carried out to reach the design index.This new method can uniquely provide all of the shape and flatness errors of the ceramic tile in once measurement.Moreover,the stability of ceramic tiles has been improved and the error caused by the gravity deformation has been reduce by 90% when optimized support positions are adopted.According to the structure characteristic and service condition of the measuring system,this paper also made a study on the scheme of error control including error analysis,measuring and compensation.The results of repeatability experiments showed that the measuring system owning a high repeatability to realize better application of the measurement model. |
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