摘要
为深入分析窄深槽加工机理,将成形电镀cBN砂轮切削部位划分为顶刃区和侧刃区。在此基础上推导出顶刃区单颗cBN磨粒的最大切削厚度的计算公式。同时对侧刃区加工过程建立数学模型,得出磨粒产生弹性滑擦的分界线长度。结合加工后窄深槽不同部位的SEM形貌分析得知,单颗磨粒最大切削厚度不同量级时,工件材料去除方式以塑性化磨削和微脆性磨削为主,当单颗磨粒的切削厚度处于10-3μm量级时,侧刃区工件材料表面出现疲劳蚀坑。文章理论推导和实验分析结果可为窄深槽加工工艺参数的优化和cBN成形工具的设计提供科学依据。
To further analyze the processing mechanism of narrow-deep-groove,the cutting tip of electroplated cBN form-grinding-wheel are divided into the top edge section and the side-blade section.On this basis,the formula of maximum cutting depth for a single cBN grit located in the top edge section has been obtained.Moreover,the processing mathematical model.the side-blade section has been established and the boundary length the cBN grit in which area was tending to generate elastic slipping-friction has been derived.In consideration of the scanning electron microscopy（SEM） morphology of narrow-deep-groove in different order of depth magnitude,we suggest that the main modes of material removing are plastic grinding and slight brittle grinding;the removing mode is true of the fatigue fracture feature when the cBN grit cutting thickness is smaller than 10-3μm.The theoretical analysis and experimental results in this paper would provide a scientific basis for optimizing process parameters and designing forming tools.
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2011年第6期63-66,70,共5页
Diamond & Abrasives Engineering
基金
国家自然科学基金项目(50975191)
山西省科技攻关项目(2007031154)
山西省高等院校科技攻关项目
关键词
CBN砂轮
窄深槽
加工机理
cBN grinding wheel
narrow-deep-groove
processing mechanism
