复杂曲面宽行加工等参数线刀轨精确搭接方法
收稿日期: 2013-06-14
修回日期: 2013-09-28
网络出版日期: 2013-10-07
基金资助
中航工业技术创新基金（2010E37220）
Iso-parametric Tool Path Overlapping Method for Sculptured Surfaces in Wide Strip Machining
Received date: 2013-06-14
Revised date: 2013-09-28
Online published: 2013-10-07
Supported by
Innovation Fund for Technology of Aviation Industry Corporation of China (2010E37220)
贺英 , 陈志同 , 吴献珍 . 复杂曲面宽行加工等参数线刀轨精确搭接方法[J]. 航空学报, 2014 , 35(4) : 1142 -1148 . DOI: 10.7527/S1000-6893.2013.0405
The iso-parametric method is widely used for the tool path generation of sculptured surface machining. Traditional methods for calculating path intervals can't ensure accuracy in wide strip machining. A path interval prediction and adjustment method is developed to avoid undercut or excessive overlap between adjacent tool paths. With this method, the subsequent tool path driving lines can be predicted from the existing tool paths. Then, effective overlap interval is constructed, and several characteristic tool positions are selected to represent the whole path. Finally, the driving line is adjusted until the machining verge of the selected tool positions fall in the effective overlap interval. The effective overlap interval provides basis for defining path interval, and the calculation burden of adjusting the driving line is greatly reduced by selecting the characteristic tool positions. A calculation example shows that the proposed method can achieve accurate overlap between adjacent tool paths.
Key words： 5-axis machining; path interval; CAM; overlapping; surfaces
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