• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (11): 205-214.doi: 10.3901/JME.2019.11.205

• 制造工艺与装备 • 上一篇    下一篇

一种拉刀螺旋容屑槽前刀面磨削砂轮安装位姿计算方法

贾康1,2, 洪军1,2, 张银行2   

  1. 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. 西安交通大学机械工程学院 西安 710049
  • 收稿日期:2018-06-19 修回日期:2018-09-22 出版日期:2019-06-05 发布日期:2019-06-05
  • 通讯作者: 洪军(通信作者),男,1968年出生,博士,教授,博士研究生导师。主要研究方向为数字化设计、数字化装配技术以及高速精密主轴系统。E-mail:jhong@mail.xjtu.edu.cn
  • 作者简介:贾康,男,1987年出生,助理研究员。主要研究方向为螺旋内齿圈拉刀制造、大尺寸空间测量。E-mail:jiakang@xjtu.edu.cn

An Approach on Wheel Setup Calculation for Helical Rake Flank Sharpening of Broaching Tool

JIA Kang1,2, HONG Jun1,2, ZHANG Yinhang2   

  1. 1. Key Laboratory of Education Ministry for Modern Design & Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049;
    2. School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049
  • Received:2018-06-19 Revised:2018-09-22 Online:2019-06-05 Published:2019-06-05

摘要: 螺旋容屑槽是螺旋拉刀的重要结构之一,螺旋前刀面的高质量精确磨削对于刀具的工作性能与服役寿命有着重要影响。提出了一种适用于螺旋前刀面刃磨的砂轮安装位姿计算方法,确保螺旋前刀面的精密磨削。首先从五轴加工角度构建砂轮安装位姿与磨削运动数学模型,然后基于离散砂轮空间运动扫掠体进行螺旋槽轴截面加工廓形的离散包络计算,并给出相应的离散磨削接触线追溯算法。在此基础上,进一步分析拉刀前刀面的磨削工艺并构建磨削工艺约束条件,形成拉刀螺旋前刀面刃磨的砂轮安装位姿计算模型及其优化搜索方法。最后进行了实例求解,通过与解析法计算结果的精度对比和磨削接触线分布位置的状态验证了该算法的有效性,并进一步对砂轮安装角、砂轮外径和加工槽宽的关系进行讨论,给出了实际应用中的砂轮安装位姿优选规则。

关键词: 接触线, 螺旋槽, 磨削工艺约束, 砂轮位姿求解, 位姿优化, 轴截面廓形

Abstract: Helical gullets are important structure of the helical broaching tools, and the precision and high-quality sharpening for the corresponding rake flanks is significant to the work performance and the life of the broaching tools. Therefore, a wheel setup method for the helical rake flank sharpening is proposed. Firstly, the wheel setup model and the motion matrix are established. Next, a discrete spatial wheel swept volume based machined gullet axial section profile identification method is presented, as well as the tracing of the discrete contact curve. On this foundation, the grinding processes of helical rake flank are analyzed and the constraints conditions are summarized, the wheel orientation calculation model for the helical rake flank is given as well as the optimized search solving method. At last, examples are performed by proposed method, and its effectiveness is verified by the precision comparison with analytical method results and the distribution status of contact curve. Moreover, the analyses of the relationship among wheel orientation, wheel radius and width of machined gullet is taken, and optimal selection of wheel setup is suggested.

Key words: contact curve, grinding constraints, helical gullet, orientation optimal, transverse profile, wheel orientation solving

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