一种刮削加工切削齿刃形计算与加工运动仿真方法  

A Method of Cutter Profile Identification and Machining Motion Simulation for Skiving

作　　者：贾康 郑帅 郭俊康 洪军[1] JIA Kang;ZHENG Shuai;GUO Junkang;HONG Jun(Key Laboratory of Education Ministry for Modem Design &Rotor-Bearing System, Xi'an Jiaotong University,Xi'an 710049;School of Software Engineering,Xi'an Jiaotong University,Xi'an 710049)

机构地区：[1]西安交通大学现代设计及转子轴承系统教育部重点实验室,西安710049 [2]西安交通大学软件学院,西安710049

出　　处：《机械工程学报》2019年第1期216-224,共9页Journal of Mechanical Engineering

基　　金：国家科技重大专项(2016ZX04004-002);中国博士后基金(2017M623158)资助项目

摘　　要：针对非特定内外廓形的刮削加工,基于刮削加工原理与展成运动,提出一种基于离散廓形包络的切削齿刃形曲线通用计算方法,适用于任意结构前刀面,并给出切触点的求解方法与相应的空间刮削切触运动的计算仿真方法。首先剖析了刮削加工原理,从工件、刀具和运动配置参数角度构建了刮削加工的运动学模型;然后,基于曲面共轭原理分析了刮削加工的正逆问题,提出基于相对刀具运动的工件曲面与前刀面相交内包络的切削刃曲线求解方法,给出了详细的计算流程与方法以及切削刃可行性的判定规则;随后,进一步提出了基于切削刃的刮削过程切触点计算方法,并给出了时序对应的空间切触运动仿真分析方法;最后,分别以内外廓形的刮削加工为例,对所提出的切削刃计算方法和加工运动仿真方法的有效性进行了验证。Focusing on the skiving of general internal and external profiles,a universal cutting edge calculation method,which involving the enveloping for discrete profiles,is proposed based on the working principle and the generating motion of skiving,and it suits for universal rake flank type.Meanwhile,the calculation method for contact points and corresponding spatial contact motion model are developed.Firstly,the skiving principle is analyzed,and the kinematic model is built in the terms of cutter,workpiece,and configuration parameters.Then,the forward and inverse questions of skiving are analyzed based on the conjugate theory,and the cutting edge curve identification that according to enveloping the intersection curves between rake flank and discrete workpiece surfaces is developed.Moreover,the detail schematic and calculation methods are described,and the judgment for the feasibility of the cutting edge is also given.Additionally,the ascertaining of cutting contact points by cutting edge and the approach on corresponded spatial cutting contact motions simulation are depicted.At last,examples for both external and internal skiving are given to verify the effectiveness of cutting edge identification and skiving motion simulation method.

关 键 词：刮削 运动学模型 切削刃曲线 切触线 运动仿真 

分 类 号：TH132[机械工程—机械制造及自动化]