力致齿轮变形对剐齿加工精度的影响分析  

Analysis of the influence of force-induced gear deformation on machining accuracy of power skiving

作　　者：陈复兴 洪荣晶[1] CHEN Fuxing;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》2020年第12期116-121,共6页Manufacturing Technology & Machine Tool

基　　金：江苏省科技成果转化专项(BA2017099)。

摘　　要：基于剐齿加工原理和齐次坐标变换理论,建立强力剐齿力致误差模型。首先,根据共轭曲面的啮合特性和两自由度空间啮合原理,得到含误差的齿面方程,建立力致误差与法向齿廓误差的映射关系。然后,通过建立齿轮工件的有限元模型和剐齿刀与齿轮接触回弹量计算模型,分别得到齿轮整体变形量和齿面接触回弹变形量。最后运用数值计算方法研究了齿轮变形对剐齿加工精度的影响。研究结果表明:相较于齿面接触回弹变形,齿轮几何误差对齿轮整体变形并不敏感。齿面接触回弹使理论齿廓发生了偏移,并随着切削力的增大,接触回弹量明显增大,齿廓法向误差增大。而随着剐齿刀与齿轮接触长度的增大,法向齿廓误差减小。Combined by the principle of power skiving and the theory of homogeneous coordinate transformation,the model of force-induced error for power skiving is established.First of all,the equation of tooth surface with error is generated by the meshing characteristics of the conjugate surface and the meshing principle of two-degree-of-freedom space,and the mapping relationship between the error of force-induced deformation and the normal error of gear tooth profile is established.Through the establishment of the finite element model of the gear workpiece and the calculation model of the contact springback between the tool and the gear,the overall deformation of the gear and the springback deformation of the tooth surface are obtained respectively.Eventually,the numerical calculation method is utilized to study the effect of gear deformation on the accuracy of power skiving.The result of research demonstrates that,compared to the springback deformation of the tooth surface contact,the geometric error of the gear is not sensitive to the overall deformation of the gear.The contact springback of the tooth surface causes the theoretical tooth profile to shift.As the cutting force increases,the amount of contact springback increases significantly,and the normal error of the tooth profile increases.As the contact length between the skiving tool and the gear increases,the tooth profile normal error decreases.

关 键 词：剐齿加工 力致误差 齿轮变形 加工精度 

分 类 号：TG61[金属学及工艺—金属切削加工及机床]