• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (1): 166-174.doi: 10.3901/JME.2020.01.166

• 数字化设计与制造 • 上一篇    下一篇

数控机床几何精度设计指标确定方法研究

王丽娜1,2, 田文杰3, 张大卫2, 高卫国2   

  1. 1. 天津中德应用技术大学机械工程学院 天津 300350;
    2. 天津大学机械工程学院 天津 300350;
    3. 天津大学海洋科学与技术学院 天津 300072
  • 收稿日期:2019-02-05 修回日期:2019-06-05 出版日期:2020-01-05 发布日期:2020-03-09
  • 通讯作者: 田文杰(通信作者),男,1986年出生,博士,讲师。主要研究方向为数控机床与工业机器人的误差建模、检测与补偿等。E-mail:wenjietian@tju.edu.cn
  • 作者简介:王丽娜,女,1988年出生,讲师。主要研究方向为制造技术。E-mail:wanglina_0718@126.com;张大卫,男,1962年出生,博士,教授,博士研究生导师。主要研究方向为机械系统动力学、高速精密定位技术、高速切削理论与应用等。E-mail:medzhang@tju.edu.cn;高卫国,男,1974年出生,博士,副教授,博士研究生导师。主要研究方向为智能机床设计与制造关键技术等。E-mail:gaowg@tju.edu.cn
  • 基金资助:
    国家科技重大专项(2018ZX04033001)和国家自然科学基金(51605324)资助项目。

Research on Determination Method of Geometric Accuracy Design Index of CNC Machine Tools

WANG Lina1,2, TIAN Wenjie3, ZHANG Dawei2, GAO Weiguo2   

  1. 1. School of Mechanical Engineering, TianjinSino-German University of Applied Sciences, Tianjin 300350;
    2. School of Mechanical Engineering, Tianjin University, Tianjin 300350;
    3. School of Marine Science and Technology, Tianjin University, Tianjin 300072
  • Received:2019-02-05 Revised:2019-06-05 Online:2020-01-05 Published:2020-03-09

摘要: 针对数控机床几何精度设计过程中整机精度设计指标难于合理确定的问题,提出一种基于待加工试件公差指标反演机床刀具工件间相对位姿误差允许变动范围的方法。该方法首先建立试件单一公差项与机床位姿误差之间的约束关系模型,即为满足试件单一公差要求,机床刀具工件间相对位姿误差需要被控制在何种范围内,然后将所有公差项对应的变动范围求交集即可得到机床位姿误差的允许变动范围,并作为整机精度设计的设计指标,用于机床零部件公差分配。推导了常用公差项对应的位姿误差变动范围的求解方法,并以机床精度检验标准中轮廓加工试件为例,阐述了所提方法的应用过程。

关键词: 数控机床, 几何精度, 精度设计, 设计指标, 公差

Abstract: Aiming at the problem that the accuracy design index of the machine tool is difficult to be determined reasonably in the geometric precision design process of CNC machine tools, a method for solving the allowable range of the pose error of the tool relative to the worktable based on the tolerances of the workpiece to be processed is proposed. Firstly, the constraint model between the single tolerance item of the workpiece and the pose error of machine tool is established. That is to say, in order to satisfy the requirement of a single tolerance item, the allowable range of the pose error can be determined. Secondly, the required accuracy design index of the machine tool can be obtained by calculating the intersection of every range corresponding to every single tolerance item, which can then be used for tolerance allocation process. The solution methods of the common tolerance items are derived, and the machining test piece is selected as an example to show the effectiveness of the proposed method.

Key words: machine tool, geometric accuracy, accuracy design, design index, tolerance

中图分类号: