五轴机床加工零件轮廓误差预测方法

吕盾 1; 刘青 1; 刘沛 2; 汤洪涛 2; 赵万华 1; 卢秉恒 1

doi:10.7652/xjtuxb202002002

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五轴机床加工零件轮廓误差预测方法

更新时间：2025-05-08

- 五轴机床加工零件轮廓误差预测方法
- Contour Error Prediction Method of Part for Five-Axis Machining
- 西安交通大学学报 2020年54卷第2期页码：9-15
- 作者机构：
  
  西安交通大学机械制造系统工程国家重点实验室,西安,710054
- 作者简介：
- 基金信息：
  
  : 2019-06-26。作者简介: 吕盾(1978—),男,副教授;赵万华(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(51775421);国家科技重大专项资助项目(2015ZX04001002)
- DOI：10.7652/xjtuxb202002002
  中图分类号： TH16;TG659
- 网络首发：2020-02-10，
  
  纸质出版：2020
- 稿件说明：
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吕盾 1, 刘青 1, 刘沛 2, 等. 五轴机床加工零件轮廓误差预测方法[J]. 西安交通大学学报, 2020,54(2):9-15.

Contour Error Prediction Method of Part for Five-Axis Machining[J]. 2020, 54(2): 9-15.
吕盾 1, 刘青 1, 刘沛 2, 等. 五轴机床加工零件轮廓误差预测方法[J]. 西安交通大学学报, 2020,54(2):9-15. DOI： 10.7652/xjtuxb202002002.

Contour Error Prediction Method of Part for Five-Axis Machining[J]. 2020, 54(2): 9-15. DOI： 10.7652/xjtuxb202002002.

摘要

研究了五轴机床进给轴实际位置预测方法和零件轮廓误差求解方法

在此基础上提出了五轴机床加工零件轮廓误差预测方法。机床进给轴实际位置的预测

通过辨识选定机床进给轴传递函数和读取待加工零件插补指令、将各轴指令输入各轴传递函数获得。零件轮廓误差的求解

通过正运动学变换求解工件坐标系下待加工零件的指令位置轨迹和实际位置轨迹、求解二者之间的轮廓误差来实现。以S形试件为加工零件

以科德KMC600S UMT五轴铣车立式复合加工中心为加工机床

预测了S缘条直纹面

的轮廓误差。刀尖位置误差和刀轴姿态误差引起的零件轮廓误差随着直纹面的位置变化

误差分别在0.04 mm和±7×10

-5

rad内。研究结果表明:建立的五轴机床加工零件轮廓误差预测方法

可以在加工前实现零件轮廓误差的精确预估

提前判断选定机床是否能够满足零件轮廓误差的要求

为优化加工参数、保证高速加工下的零件轮廓精度提供依据。

Abstract

The actual position prediction method of the feed shaft for five-axis machining and the solving scheme for part contour error were investigated

and a part contour error prediction method for five-axis machining was then proposed. The actual position prediction of the feed shaft was obtained by identifying the transfer function of the feed shaft for candidate machine tool

reading the interpolation instructions of the parts to be processed

and inputting the instructions of each axis into the transfer function of each axis. The solving scheme for the part contour error was reali-ed by the forward kinematic transformation to the instruction position trajectory and the actual position trajectory of the part to be processed in the workpiece coordinate system

and the contour error between the above two trajectories was sought out. An S-shaped test piece was chosen as the processed part and the vertical composite machining center of KEDE KMC600S UMT five-axis turn-milling was considered as

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