基于参数曲面映射的五轴数控螺旋加工轨迹计算方法
Processing Calculation Method of 5-axis NC Spiral Trajectory Based on Parametric Surface Mapping
查看参考文献13篇
|
文摘
|
采用五轴数控机床进行高速加工时,加工干涉及曲面转角处的突变会造成刀轴矢量剧烈变化,而采用传统的退刀再进刀的方法又难免导致加工效率及质量的降低。针对上述问题,提出一种新颖的适用于五轴高速加工的刀具路径生成算法。该方法由偏微分方程的热传导模型,计算得到映射参数域内满足加工参数的温度等值线,制定映射规则并在标准参数域内规划出加工轨迹,从而在对应参数域内映射生成螺旋轨迹,并将该轨迹映射到参数曲面上获得曲面的螺旋加工轨迹,该轨迹可以实现无退刀加工。采用上述算法进行了仿真,仿真结果表明该方法优于现有加工方法,可实现基于参数曲面及裁剪曲面的复杂型腔的高速加工。 |
|
其他语种文摘
|
Using 5-axis CNC machine tools for high speed machining, once a mutation occurs somewhere in the processing interference and mutations of surface corner, the mutation of tool axis vector may occur rapidly, while the use of traditional methods including retracting and then engaging again, will inevitably lead to reduce the product quality and process efficiency. To solve the above problems, a novelty path generation algorithm for 5-axis high speed machining is proposed. The processes are carried out which are using partial differential equations of heat conduction model and defining the projection parameters of projection region for the calculation of contours within the projection region, selecting out of the temperature contours which meet the processing conditions, defining the mapping rules and planning processing trajectory within the standard parameter domain, then mapping trajectory to the corresponding parameter domain to generate spiral trajectory, and mapping the spiral trajectory to the parametric surface to generate the spiral processing trajectory. This processing trajectory can be achieved without retracting processing. Using the above algorithm to obtain the simulation results, it shows that the new method is superior to traditional processing methods. The results also show that this method can achieve high-speed processing based on the complexity of parametric surfaces and cavity of trimmed surface. |
|
来源
|
机械工程学报
,2013,49(5):100-109 【核心库】
|
|
DOI
|
10.3901/jme.2013.05.100
|
|
关键词
|
五轴数控加工
;
偏微分方程
;
映射规则
;
螺旋轨迹
|
|
地址
|
中国科学院沈阳自动化研究所, 沈阳, 110016
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0577-6686 |
|
学科
|
自动化技术、计算机技术 |
|
基金
|
国家重点基础研究发展计划(973计划)
;
国家自然科学基金
|
|
文献收藏号
|
CSCD:4785182
|
参考文献 共
13
共1页
|
|
1.
徐金亭. 自由曲面加工中的等参数螺旋轨迹生成方法.
机械工程学报,2010,46(3):148-151
|
被引
15
次
|
|
|
|
|
2.
徐金亭. 基于网格曲面模型的等残留刀位轨迹生成方法.
机械工程学报,2010,46(11):193-198
|
被引
19
次
|
|
|
|
|
3.
Ren Fei. Combined reparameteriza tion-based spiral toolpath.
Advanced Manufacturing Technology,2009,40(7/8):760-768
|
被引
9
次
|
|
|
|
|
4.
Zhu Hu. Spiral tool-path generation with constant scallop height for sheet metal CNC incremental forming.
Advanced Manufacturing Technology,2011,54(9/12):911-919
|
被引
11
次
|
|
|
|
|
5.
Lee E. Contour offset approach to spiral toolpath generation with constant scallop height.
Computer-Aided Design,2003,35(6):511-518
|
被引
27
次
|
|
|
|
|
6.
Pateloup V. B-spline approximation of circle arc and straight line for pocket machining.
Computer-Aided Design,2010,42(9):817-827
|
被引
15
次
|
|
|
|
|
7.
Bieterman M. A curvilinear tool-path method for pocket machining.
Journal of Manufacturing Science and Engineering,2003,125(4):709-715
|
被引
10
次
|
|
|
|
|
8.
詹阳烈. 螺旋刀具轨迹规划的水平集方法.
机械制造,2009,47(3):39-41
|
被引
1
次
|
|
|
|
|
9.
陆君安.
偏微分方程的MATLAB解法,2001
|
被引
23
次
|
|
|
|
|
10.
Haberman R.
Applied partial differential equations,with Fourier series and boundary value problems. (4th ed),2007
|
被引
1
次
|
|
|
|
|
11.
姬俊锋. 自由曲面叶片数控加工刀具轨迹规划方法.
机械科学与技术,2008,27(5):652-656
|
被引
4
次
|
|
|
|
|
12.
霍颖.
基于等残留高度法的五轴NC加工刀位轨迹规划,2005
|
被引
3
次
|
|
|
|
|
13.
牛文铁. 数控加工中定曲线方程轮廓的等弦高误差拟合算法研究.
制造业自动化,2001,23(9):7-10
|
被引
1
次
|
|
|
|
|
了解气象卫星更多信息，请访问