基于微晶刚玉磨粒切削的20CrMnTi齿轮钢磨削机理研究  

Research on grinding mechanism of 20CrMnTi steel based on micro crystalline corundum grit cutting

作　　者：王龙[1] 田欣利[1] 刘谦[1] 唐修检[1] 吴志远[1] 杨理钧 

机构地区：[1]装甲兵工程学院装备维修与再制造技术国防科技重点实验室,北京100072

出　　处：《制造技术与机床》2017年第6期80-84,共5页Manufacturing Technology & Machine Tool

基　　金：国家科技重大专项(2015ZX04003006)

摘　　要：为了研究微晶刚玉砂轮对20CrMnTi低碳合金钢的磨削机制与磨削力规律,采用单颗微晶刚玉磨粒划擦实验模拟20CrMnTi钢的磨削加工过程,进而推导出了单颗磨粒划擦的磨削力数学模型公式。研究表明:20CrMnTi钢划痕呈现显著的塑性去除形式,且划擦过程伴随着显著的力值特征。法向力与切向力均随着划擦深度、进给速度的增大而增大,划擦深度对磨削力的作用更明显。单颗磨粒的磨削力源于切屑变形和摩擦,切屑变形引起的法向力和切向力之比为0.75,磨粒顶部与材料的摩擦系数为0.46。To study the forming mechanism and rule of grinding force of low carbon alloy 20CrMnTi steel using micro crystal grinding wheel, single micro crystalline corundum grit scratching experiment was used to simulate the grinding process of 20CrMnTi steel, and then mathematical formula of the grinding force physical model with single abrasive is derived. It shows that significant plastic removal mode is occurred on the scratch morphology of 20CrMnTi steel, and the force value characteristic of scratching process. Normal force and tangential force increase with the increasing of scratching depth and feed rate, and the effect of scratching depth on the grinding force is more obvious. The grinding force of single grit originated from the chip deformation and friction. Ratio of normal force and tangential force caused by the cutting chip deformation was 0. 75. Friction coefficient of the top of grain and material was 0. 46.

关 键 词：磨削机理 低碳合金钢 微晶刚玉磨粒 数学模型 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床] TH142.2[一般工业技术—材料科学与工程]