| Summary: | 碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 101 === In tire manufacture processing, it has six main procedure including mixing, extruding, calendaring, cutting, building, and inspection. The ripened rubber is wrapping on the steel cord, ply, and different materials in the calendaring processing. And this synthetic material will be the component of the tire. According to different dimension requirement of the tire, these ply and rubber will be cut in different length.
Tire structure of the tire can be sort by few parts, including bead filler, steel belt, bead wire, inner liner, sidewall rubber, and bead etc. Inner liner is the part at bottom layer of tire. If the dimension of inner liner not fit the requirement of the dimensions, the tire pressure will be insufficient. When the manufacture processing finished, the specifications of the tire like profile, dimension, intensity, and bubble inspection etc. must be checked. In bubble inspection, it is the processing which is to ensure whether there has the bubble inside the tire, to avoid the influence of the durability and safety.
Currently, the inspection of inner liner parameters was measured by tape. In this way, there will have some problems of measurement accuracy, measurement error, and low efficiency. For solving these problems, an automatic and on-line measurement system for dimensional measurements of the inner liner has been developed. The proposed system contains image processing, camera, three axial stages, rotation stage, font lighting and self-developed measurement program. By the development of this system, the whole width of inner liner and the overlap widths at both side edges can be measured automatically. The determinations of bubble and its dimension of the tire are detected by bubble inspection machine. And the results of the bubble inspections are determined by the operators, according to their own experience. For this reason, the determination of the tire bubble is not an absolute inspection. So, in this investigation, the bubble inspection machine and the bubble inspection program are combined for the automatic tire bubble detection.
To verify the measurement characteristics of inner liner dimension, the repeatability analysis and the comparison experiments with 2D image measurement system and commercial image program has been carried out. According to the experiment results, the standard deviation of the proposed measurement system is about 0.37mm and the maximum deviation between this system and reference system is 0.78 mm.
Besides, the repeatability analysis and the comparison experiments with bubble inspection machine have also been carried out. According to the experiment results, the accuracy rate of the proposed measurement system is about 85 % (samples are more then 5000) and the maximum deviation between this system and reference system is 1 mm. Therefore, the inspection system could meet the requirement of industrial application.
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