碟轮修整对单层钎焊金刚石砂轮磨粒形貌影响研究

Influence of plate wheel dressing on grain morphology of mono-layer brazed diamond grinding wheel

为揭示修整对金刚石砂轮磨粒形貌的影响规律,利用光学显微镜,分别对不同修整量下的磨粒形貌进行追踪观测;针对磨粒形貌变化,对磨粒磨损形式、磨粒切削刃宽度、顶面面积和刃圆半径的变化规律进行了统计分析。结果显示:在碟轮修整过程中,磨粒主要发生磨耗磨损,小部分发生破碎和断裂,且各种磨损比例均逐渐升高。随着修整量增加,磨粒平均切削刃宽度和平均顶面面积逐渐增大,而平均刃圆半径则呈现先增大后减小的变化规律。

In order to reveal the influence of dressing plate wheel on grain morphology of mono-layer brazed diamond grinding wheel,the morphology was observed and measured in different phases of dressing by using the optical microscope. The changes of abrasive wear form,cutting edge width,top surface area and cutting edge radius were statistically analyzed to characterize the change of grain morphology. The results show that attritious wear mainly occurs in the process of dressing with plate wheel,and that a few grinding grains are fractured and sheared off. The ratio of wear mentioned above increases gradually. Meanwhile,with the increase of the dressing amount,the average cutting width and the average top surface area increase gradually,while the average cutting edge radius increases firstly and then decreases.