共查询到17条相似文献,搜索用时 265 毫秒
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以动态电阻与接头质量参数之间关系为例,用线性回归分析技术,系统地研究了点焊加热过程中的监测信息与点焊接头质量参数之间的一元和多元回归模型关系。结果表明:(1)各种回归模型总体线性关系经统计检验均为高显著,可以用于点焊接头质量监测;(2)一元回归模型的决定系数仅为0.15-0.33,多元回归模型的决定系数则可以提高到0.59-0.79,说明发展多参量综合监测技术是提高点焊质量监控精度的有效途径;(3)点焊过程监测信息与质量参数之间关系也含有较大的非线性,用线性模型去描述这样的关系导致模型误差的增加。 相似文献
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电阻点焊过程及质量控制方法的研究进展 总被引:10,自引:2,他引:10
较为详细地介绍了几种有代表性的点焊质量控制方法的原理及具体应用;重点介绍了动态电阻法和热膨胀电极位移监控法,并简要介绍了点焊质量控制方法的最新发展动态。 相似文献
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Effects of modeling means on properties of monitoring models of spot welding quality 总被引:1,自引:0,他引:1
Analyzing and modeling the relation between monitoring information during welding and quality information of the joints is the foundation of monitoring resistance spot welding quality. According to the means of modeling, the known models can be divided into three large categories: single linear regression models, multiple linear regression models and multiple non-linear models. By modeling the relations between dynamic resistance information and welding quality parameters with different means, this paper analyzes effects of modeling means on performances of monitoring models of resistance spot welding quality. From the test results, the following conclusions can be drawn: By comparison with two other kinds of models, artificial neural network (ANN) model can describe non-linear and high coupling relationship between monitoring information and quality information more reasonably, improve performance of monitoring model remarkably, and make the estimated values of welding quality parameters more accurate and reliable. 相似文献
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0Introduction Uptonow,thedifficultytodevelopmonitoringtech niqueofresistancespotweldingquality,stillisthatthe weldingqualityparameters,suchassizesandstrengthof nugget,cannotbemeasureddirectly,butonlycanbede ducedindirectlyfromsomeprocessparameters.Since… 相似文献
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点焊技术在汽车工业中的应用 总被引:7,自引:2,他引:5
介绍了电阻点焊技术的主要原理和影响电阻点焊的主要因素以及常用的电极材料、点焊设备,分析了汽车工业中新材料的点焊性能和电阻点焊质量控制技术,探讨了点焊新技术、点焊机器人在汽车工业中的应用。 相似文献
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