基于数控代码的构造曲面法向矢量的求解方法
PDF下载 (318)曾云川,詹建明*,赵 钰.基于数控代码的构造曲面法向矢量的求解方法[J].宁波大学学报(理工版),2015,28(03):94-97.DOI:
ZENG Yun-chuan,ZHAN Jian-ming *,ZHAO Yu.
NC Code Based Normal Vector of Constructed Free-form Surface
[J].Journal of Ningbo University(Natural Science & Engineering Edition),2015,28(03):94-97.DOI:| Title: | NC Code Based Normal Vector of Constructed Free-form Surface |
| 作者: | 曾云川, 詹建明*, 赵 钰 |
| Author(s): | ZENG Yun-chuan, ZHAN Jian-ming *, ZHAO Yu |
| 关键词: | 构造曲面; 法向矢量; 数控代码; 三角网格 |
| Keywords: | constructed free-form surface; normal vector; numerical control code; triangular mesh |
| 分类号: | TG659 |
| 文献标识码: | A |
| 摘要: | 采用区别与传统全局建模的方法, 基于三坐标数控代码直接提取出曲面的表面数据点, 然后用散乱点三角网格模型, 先求出空间坐标点两个方向的切向矢量, 进而求出曲面的法向矢量. 最后用算例说明了该计算方法较传统的全局建模方法有计算量较小而精度较高的优势. |
| Abstract: | Five axis NC (numerical control) machining of mold surfaces needs the normal vector of machining points to determine the position of the cutter, and the main method of generating mold surfaces now is using the constructed free-form surface. The problems arise when it is difficult to describe the constructed free-form surface using mathematical formula, or there is no such a mathematical formula at all. To tackle this problem, different from the traditional global modeling method, in this paper we use the three coordinates NC code to extract the surface point directly by adopting the triangular mesh model, calculating two directions of the tangential vector then calculating the surface normal vector. The proposed method proves to be time-saving in calculation with higher accuracy |
| 参考文献 /References: | [1] 纪玉坤. 基于UG的五轴数控加工NC代码仿真[D]. 大连: 大连理工大学, 2005. [2] 曾志迎. 复杂曲面的五坐标数控加工关键技术研究[D].太原: 太原科技大学, 2012. [3] Jung H, Hwang J D, Park K B. Development of practical post processor for 5-axis machine tool with non- orthogonal rotary axes[J]. J Cent South Univ Technol, 2011, 18:159-164. [4] 郑东. 复杂曲面三坐标矢量化测量方法研究及应用[J].航空精密制造技术, 2012(5):20-22. [5] 刘大峰, 戴宁, 孙全平, 等. 面向曲面重构的切平面法矢方向调整算法[J]. 机械科学与技术, 2008(2):192- 197. [6] 彭育辉, 高诚辉. 基于形状修正的三角网格模型顶点法矢估算方法[J]. 中国图象图形学报, 2010(1):142- 148. [7] Gouraud H. Continuous shading of curved surfaces[J]. IEEE Transactions on Computers, 1971, 20(6):623-629. [8] Taubin G. Estimating the tensor of curvature of a surface from a polyhedral approximation[C]//Grimson E. Proceedings of the 5th International Conference on Computer Vision. Washington D C: IEE Computer Society, 1995:902-907. [9] 神会存, 李建华, 周来水. 三角网格模型顶点法矢与离散曲率计算[J]. 计算机工程与应用, 2005, 41(26):12- 15. |
| 备注/Memo: | 收稿日期: 2014?05?20. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 浙江省自然科学基金（LY12E05007）; 宁波市重大科技攻关招标项目（2012B10057）.第一作者: 曾云川（1990－）, 男, 重庆人, 在读硕士研究生, 主要研究方向: 数字化精密制造. E-mail: zycxa@qq.com*通信作者: 詹建明（1974－）, 男, 江西余干人, 教授, 主要研究方向: 数字化精密制造. E-mail: zhanjianming@nbu.edu.cnz 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
