后刀面对数螺旋曲面的逼近方法和实现机构  

Approximation Method of Logarithmic Spiral Used as Tool Flank Surface and Realization Mechanism

作　　者：陈晓龙 顾立志 Chen Xiaolong;Gu Lizhi(Mechanical Engineering of Huaqiao University,Luojiang District Diamond Tool Co.,Ltd.of Quanzhou,Quanzhou,Fujian 362000,China;Key Laboratory of Fujian Colleges and Universities for Virtual Manufacturing Technology,Quanzhou University of Information Engineering,Quanzhou,Fujian 362000,China)

机构地区：[1]双阳金刚石工具有限公司 [2]泉州信息工程学院机械与电气工程学院 [3]华侨大学机电及自动化学院

出　　处：《工具技术》2021年第12期50-54,共5页Tool Engineering

基　　金：泉州市机械设计制造及其自动化顾立志工作室建设项目,虚拟制造技术福建省高校重点实验室开放课题(Xnzz1801,Xnzz1803);泉州市高层次人才项目(2020C4051,2020C013R)。

摘　　要：在金属切削成型刀具中,刀具后角对切削性能的影响至关重要,通常设计和使用最优后角值。但以阿基米德螺旋面为后刀面、重磨前刀面的成型刀具一旦发生磨损重磨,后角值便会偏离原有理想值,直接影响切削效果和刀具使用寿命。本文提出了一种以逼近对数螺旋面为工作后刀面的设计方案,无论重磨多少次,刀具后角均始终保持原理想值。设计了相应的实现机构并进行了误差分析,结果表明,以逼近对数螺旋面为工作后刀面可以保证刀具合理后角且不发生变形,逼近误差在可接受范围内。In metal cutting forming tools,the influence of tool back angle on cutting performance is very important.The optimal back angle value is usually designed and used.However,when the Archimedean spiral surface is used as the flank or the regrinding rake surface,the flank angle deviates from the original ideal value once it is worn and regrinding,which directly affects the cutting effect and tool service life.This paper presents a design scheme taking the approximate logarithmic helicoid as the working flank.The tool flank angle always keeps the original ideal value,no matter the times of regrinding of the tool rake.The corresponding implementation mechanism is given and the error analysis is carried out.The results show that the use of the approximate logarithmic helicoid as the working flank can ensure the optimal clearance angle keeping from deformation,and the approximation error is within the acceptable range.

关 键 词：逼近对数螺旋曲面 最优后角值 逼近对数螺旋曲面的实现机构 误差估计 

分 类 号：TG702[金属学及工艺—刀具与模具]