基于当量磨削层厚度的整体刀具容屑槽磨削功率模型  

Grinding power model for flute grinding of solid tools based on equivalent chip thickness

作　　者：任磊 潘江涛 向道辉[1] 马俊金 崔晓斌[1] REN Lei;PAN Jiangtao;XIANG Daohui;MA Junjin;CUI Xiaobin(School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo 454003,Henan,China)

机构地区：[1]河南理工大学机械与动力工程学院,河南焦作454003

出　　处：《金刚石与磨料磨具工程》2025年第1期67-74,共8页Diamond & Abrasives Engineering

基　　金：国家自然科学基金青年项目(52005165);河南省科技攻关项目(242102221016)。

摘　　要：磨削功率与整体刀具容屑槽的磨削质量密切相关。提出一种基于当量磨削层厚度的整体刀具容屑槽磨削功率模型,将砂轮离散化为一组等厚度的砂轮薄片,由砂轮与刀具间的瞬时接触线计算各砂轮薄片的接触弧长;再通过引入磨削接触区形状系数计算沿砂轮宽度方向逐渐变化的当量磨削深度和当量进给速度,得到各砂轮薄片对应的当量磨削层厚度;在此基础上建立容屑槽磨削功率模型,并通过磨削实验对模型进行验证。结果表明:模型的功率预测值与测量值间的最大相对误差<15.0%;沿砂轮宽度方向的最大当量磨削层厚度和最大单位宽度磨削功率存在于砂轮边缘处,将导致砂轮宽度方向上的非均匀磨损。Objectives:During the flute grinding process of solid tools,the majority of grinding power is converted into grinding heat.Excessive grinding power can cause a rapid temperature rise on the surface of the contact area between the grinding wheel and the tool,which can easily lead to grinding burns and eventually tool failure.A grinding power model for flute grinding of solid tools is proposed based on equivalent chip thickness,aiming to achieve precise prediction and control of grinding power for flute grinding.Methods:A kinematic model for flute grinding is established using homogeneous coordinate transformation.On this basis,according to the theory of conjugate surfaces,the instantaneous contact line between the grinding wheel surface and the flute surface during the grinding process is obtained,and the grinding wheel is discretized into a set of equally thick grinding wheel slices.The grinding contact arc length is obtained by calculating the intersection points between the grinding wheel slices and the tool cylindrical surface.Flute grinding is regarded as external cylindrical grinding with a special contact zone shape.By introducing the contact-areashape coefficient to define the equivalent grinding depth and the equivalent feed rate of each grinding wheel slice,the formula for calculating the equivalent grinding layer thickness of flute grinding is derived.When the linear speed of the grinding wheel,the axial feed speed of the workpiece,and the grinding contact arc length of each grinding wheel slice are known,the equivalent chip thickness of each grinding wheel slice can be calculated as long as the shape coefficient of the contact area is given.The cross-section profiles of the chute are discretized into small triangles,and the area of the cross-section profile of the chute is obtained by calculating the area of each triangle.The material removal rate of the chute during grinding is determined by combining the axial feed velocity of the workpiece.According to the principle of conservation of material remov

关 键 词：整体刀具 容屑槽 磨削功率 当量磨削层厚度 螺旋槽 

分 类 号：TG71[金属学及工艺—刀具与模具] TG74TG58TG593