Y轴丝杠热膨胀对包络铣齿加工精度的影响  

Effect of thermal error of Y- axis screw on the accuracy of envelope milling

作　　者：姚俊华 洪荣晶[1] YAO Junhua;HONG Rongjing(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211800,CHN)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211800

出　　处：《制造技术与机床》2022年第2期140-144,共5页Manufacturing Technology & Machine Tool

基　　金：江苏省科技成果转化专项(BA2017099)。

摘　　要：基于包络铣齿和齐次坐标变换原理,建立包络铣齿热误差对齿廓误差影响分析模型。分析了机床结构与加工特点确定机床丝杠热特性。将丝杠热变形量代入机床误差传递矩阵中,获得刀具螺旋面偏差,研究了丝杠热膨胀与齿廓误差的关系。结果表明:丝杠轴向热膨胀会引起刀具螺旋面产生偏移,造成相应的齿廓误差。Based on the theory of envelope milling and homogeneous coordinate transformation,an analytical model of the influence of envelope milling gear thermal error on tooth profile error is established.The structure and machining characteristics of the machine tool are analyzed to determine the thermal characteristics of the machine tool lead screw.The thermal deformation of the lead screw is substituted into the machine tool error transfer matrix to obtain the tool helix deviation,and the relationship between the thermal expansion of the lead screw and the tooth profile error is studied.The results show that the axial thermal expansion of the lead screw will cause the deviation of the tool helical surface and the corresponding tooth profile error.

关 键 词：包络铣齿 热误差 刀具螺旋面 齿廓误差 

分 类 号：TG61[金属学及工艺—金属切削加工及机床]