工程机械产品可再制造性与金属腐蚀程度评价研究

发布时间：2018-06-10 19:57

本文选题：再制造 + 可再制造性　；参考：《天津大学》2012年硕士论文

【摘要】：再制造工程由于其丰厚的环境、资源和社会效益而受到广泛的关注，成为实现可持续发展的一个重要方法，材料腐蚀和再制造息息相关。本文结合工程机械产品可再制造性评价与金属腐蚀程度评价开展研究。本文参照国内外研究总结的产品可拆卸性评估方法模型和产品可再制造性的模型，对ZL50装载机变速箱的拆卸过程和其可再制造性进行了系统的研究。利用Microsoft Visual C++语言开发出产品可再制造性评价系统，目前已实现的功能为：计算经济性和技术性指数，存储和查询相关数据。产品可再制造性评价系统的开发简化了产品可再制造性指数的计算过程并可以系统地存储相关数据，对产品的可再制造性研究具有一定的意义。在收集大量数据和实验的基础上，利用本文开发的软件对ZL50装载机变速箱的可再制造性系统的研究和评价，验证了该软件的正确率和实用性。材料腐蚀也是和再制造相关的问题，本文研究了利用图像处理技术定性和定量评价金属腐蚀程度，应用适用于现场暴露试样的三维腐蚀形貌图像采集系统对Q235钢模拟大气环境的腐蚀形貌图像进行了采集。为了消除固定孔和边缘的影响对所采集到得图像统一进行裁剪，之后转换为灰度图像，进行中值滤波处理，滤除图像采集过程中的噪声，为了更好的观察图像的细节信息，根据熵标准应用小波包变换对预处理后的图像进行分解，选取最优子图像后并提取其能量值。实验结果表明根据图像能量值的变化可以对腐蚀试样进行定性的判断，进一步根据计算出的图像特征值可以定量的判断大气腐蚀早期腐蚀程度。实验结果表明，，该方法可以对Q235钢模拟大气腐蚀早期行为进行判断和预测。
[Abstract]:Because of its rich environment, resources and social benefits, remanufacturing engineering has been widely concerned. It has become an important method to achieve sustainable development, material corrosion and remanufacturing are closely related. In this paper, the remanufacturability evaluation of construction machinery products and the evaluation of metal corrosion degree are studied. In this paper, the disassembly process and remanufacturability of ZL50 loader gearbox are systematically studied according to the evaluation method model of product detachability and the model of product remanufacturability summarized at home and abroad. A product remanufacturability evaluation system is developed by using Microsoft Visual C language. At present, the functions that have been realized are: calculating economic and technical indexes, storing and querying related data. The development of product remanufacturability evaluation system simplifies the calculation process of product remanufacturability index and can store relevant data systematically, which is of certain significance to the research of product remanufacturability. On the basis of collecting a large number of data and experiments, the research and evaluation of the remanufacturing system of the ZL50 loader gearbox is carried out by using the software developed in this paper. The correctness and practicability of the software are verified. Material corrosion is also a problem related to remanufacturing. This paper studies the qualitative and quantitative evaluation of metal corrosion using image processing technology. The corrosion morphology images of Q235 steel in simulated atmospheric environment were collected by using a 3D corrosion image acquisition system suitable for field exposed samples. In order to eliminate the influence of fixed hole and edge, the collected image is cut uniformly, then converted into gray image, and then processed by median filter, and the noise in the process of image acquisition is filtered, and the detailed information of the image is observed better. According to entropy standard, wavelet packet transform is used to decompose the preprocessed image, select the optimal sub-image and extract its energy value. The experimental results show that the corrosion samples can be judged qualitatively according to the change of image energy value, and the corrosion degree of early atmospheric corrosion can be quantitatively judged according to the calculated image eigenvalues. The experimental results show that this method can be used to predict the early simulated atmospheric corrosion behavior of Q235 steel.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH16;TG172

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