共查询到20条相似文献,搜索用时 203 毫秒
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我厂采用MA7675/1双端面磨床磨削中大型轴承套圈端面时(如磨削315与411轴承套圈),由于使用的是加工中小型套圈的砂轮GB80R_3S·PJ,使套圈两端面容易产生烧伤。 相似文献
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为满足对轴承套圈更快捷、更全面、更精细的自动化无损检测需求,提出了一种基于交直流复合磁化的漏磁检测方法。通过布置正交的交流、直流磁化器对套圈的检测面进行复合磁化,可以激励出不同方向裂纹的漏磁场,再通过设计的差分电感仿形阵列探头检测复合磁化下漏磁场的法向分量,通过分频处理分别得到周向和轴向的裂纹信号。在自动化检测过程中,双机械手在2个不同工位分别带动漏磁检测探头,通过快速精准的跟踪扫查运动实现对轴承套圈内、外径面及2个端面的全方位自动化探伤。试验表明,该系统的定位精度满足轴承套圈的检测需求,而且开放式可编程的结构有利于轴承生产中的快速换型。 相似文献
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Bearing defect inspection based on machine vision 总被引:2,自引:0,他引:2
Appearance defects inspection plays a vital role in bearing quality control. Human inspection is a traditional way to remove defective bearings, which is instable and time consuming. In this paper, we develop a machine vision system for bearing defect inspection, which can inspect various types of defects on bearing covers, such as deformations, rusts, scratches and so on. The proposed system designs a novel image acquisition system to enhance the defects appearances and get controlled image acquisition environment. A series of image processing methods are proposed or utilized to inspect the defects. Especially, for the deformation defects on seal, we find a common rule on the distribution of projection, and design a simple but effective inspection algorithm based on the rule. The proposed system is evaluated and compared with skilled human by the recall, precision and F-measure. Experimental results show that the proposed vision system has high accuracy and efficiency. 相似文献
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Xiangqian Peng Youping Chen Wenyong Yu Zude Zhou Guodong Sun 《The International Journal of Advanced Manufacturing Technology》2008,39(11-12):1180-1189
Quality control is a crucial issue in a float glass factory, and defects existing in float glass can dramatically depress glass grade. Manual inspection in float glass quality control cannot catch up with the development of float glass industry, and automatic glass defect inspection has been a trend. An online defects inspection method for float glass based on machine vision is presented in this paper, and a distributed online defect inspection system for float glass fabrication is realized. This method inspects defects through detecting the change of image gray levels caused by the difference in optic character between glass and defects. A series of image processing algorithms are set up around the analysis of glass image and the requirements of online inspection system such as reliability, real-time, and veracity. Image filtration based on gradient direction is used to filter noise and reserve the source information of defects. Downward threshold based on adaptive surface removes the background composed with stripes and strengthens defect features. Distortion part and core part of defects are obtained through fixed threshold and OTSU algorithms with gray range restricted, respectively. The fake defects (insects, dust, etc.) are eliminated based on the texture of real defects. The application of an inspection system based on this method in Wuhan glass factory proves this inspection method is effective, accurate, and reliable. 相似文献
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针对套圈生产中表面经常发现的准圆形或长圆形黑点状缺陷进行宏观检查和金相分析,在材料内部没有检测到相应的组织缺陷,确定这些缺陷为套圈表面的小孔腐蚀.介绍了小孔腐蚀的特点及其形成机理,进一步对小孔腐蚀缺陷进行了再现试验,发现与上述套圈表面出现的缺陷一致.结果表明:在一定温度、湿度和侵蚀性阴离子(如Cl-)存在的条件下,套圈表面极易发生小孔腐蚀. 相似文献
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刘保朝 《工业仪表与自动化装置》2017,(4)
目前机器人视觉系统正越来越广泛地应用于视觉检测、视觉引导和视觉装配领域。为了使机器人能够快速准确地识别、检测、抓取工作台上的工件,该文设计了一套双目视觉的六自由度工业机器人控制系统。文中以张正友摄像机标定法为理论依据研究双目视觉合成技术,利用MATLAB摄像机标定工具箱分别获取左右摄像机的内外参数;通过建立机器人用户坐标系、摄像机坐标系以及世界坐标系实现了空间坐标转换;由OpenCV图像处理算法获得工件坐标位置,控制系统驱动机器人实现工件抓取。 相似文献
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针对利用视觉图像技术检测O形(密封)圈这类全向曲面特征零件的表面缺陷时存在曲面成像一致性差的难题,研究了曲面成像基础理论和航天系统用O形圈表面成像及其表面缺陷的全自动检测方法。首先,把O形圈表面划分为细小网格状的曲面小块,基于曲面小块的双向反射分布函数得到点光源辐照时曲面小块的辐射强度计算公式。然后,通过半球积分求得空间连续光源辐照条件下曲面小块的辐射强度计算方法。最后,结合O形圈曲面方程,建立了O形圈表面成像理论,并据此提出基于三镜头相机组的O形圈表面缺陷成像检测方法。对O形圈弧段曲面的成像实验表明:理论计算的亮度分布与实际亮度分布一致,垂直安装的镜头相机组对应的平均亮度误差为6.8,标准差为12.6;倾斜安装的镜头相机组相应的平均亮度误差最大为19.4,标准差为10.3;缺陷检测实验表明,所提方法能可靠检测出O形圈表面任意位置的缺陷,能够实现航天密封圈的全自动可靠检测。 相似文献