图像特征分析法凸轮轴颈渗铜环坯状态监测技术

Image analyzing method inspect technique for the state of copper infiltration annulation in cam shaft tip

汽车凸轮轴颈渗铜,是提高凸轮轴颈表面耐磨性能的重要加工环节.该加工环节的正常完成,依赖于在加热处理前,将渗铜环坯正确放置到零件指定表面上.没有放置渗铜环坯或放置位置不对就被送进加热处理设备,将产生渗铜不合格零件.实施凸轮轴颈渗铜环坯状态监测的难点是,排布在高温渗铜炉传送带上的凸轮轴颈工件位置是不固定的;各工件之间的距离也是变动的;工件相对光源位置不同导致特征影象的显著区别.为此,采用突出特征点快速识别方法对每个工件实现定位;采用局部特征模板比对法进行渗铜环坯放置的判别;采用梯度补偿法消除光照分布场趋异的影响.经实测,所采用方法是有效的。

To improve the wearability of the motors camshaft tip surface,the copper infiltration is an important process.The well-balanced implement of the copper infiltration is strongly depended on the copper annulation's correct location to be placed before heat treatment.The difficulties for the inspecting are:the uncertain location of each camshaft on belt conveyer,the fluctuant distances between every camshaft,the dissimilar position with lamp.To solve these problems,a fast recognizing method and a special copper annulation judgement way,and an illumination compensation measure are presented.According to the experiment results,the methods mentioned above are effective.