Rough and finish tool-path generation for NC machining of freeform surfaces based on a multiresolution method

2004 ◽  
Vol 36 (12) ◽  
pp. 1231-1239 ◽  
Author(s):  
Z. Yin
Keyword(s):  
Tool Path ◽  
Nc Machining ◽  
Tool Path Generation ◽  
Path Generation ◽  
Freeform Surfaces

Spiral tool path generation method in a NURBS parameter space for the ultra-precision diamond turning of freeform surfaces

2020 ◽  
Vol 60 ◽  
pp. 340-355
Author(s):  
Shuai He ◽  
Jianping Xuan ◽  
Wenhao Du ◽  
Qi Xia ◽  
Shoucong Xiong ◽  
...  
Keyword(s):  
Parameter Space ◽  
Tool Path ◽  
Tool Path Generation ◽  
Diamond Turning ◽  
Path Generation ◽  
Freeform Surfaces ◽  
Spiral Tool Path ◽  
Ultra Precision

Tool path generation for ultra-precision polishing of freeform optical surfaces in an off-axis three-mirror imaging system

2015 ◽  
Vol 231 (5) ◽  
pp. 814-824 ◽  
Author(s):  
Dengpeng Huang ◽  
Lei Zhang ◽  
Shijun Ji ◽  
Ji Zhao
Keyword(s):  
Tool Path ◽  
Imaging System ◽  
Concentric Circle ◽  
Tool Path Generation ◽  
Numerical Control ◽  
Path Generation ◽  
Freeform Surfaces ◽  
Primary Mirror ◽  
Tool Paths ◽  
Ultra Precision

The optical performance of the off-axis three-mirror imaging system can be greatly improved using freeform surfaces. This article focuses on the polishing of the primary mirror and tertiary mirror in an off-axis three-mirror imaging system. The primary mirror and tertiary mirror are fabricated on one monolithic substrate and described by non-uniform rational B-spline–based freeform surfaces. The separated and integrated polishing strategies are presented for polishing the two mirrors on the four-axis computer numerical control polishing platform. A tool path generation approach is proposed for polishing of the non-uniform rational B-spline–based freeform surface. Three kinds of the tool paths are given for ultra-precision polishing of the primary mirror and tertiary mirror with the freeform surfaces. The concentric circle path and the approximately concentric circle path are generated for polishing two mirrors separately, while the spiral path is calculated for integrated polishing of two mirrors simultaneously. The polishing tool posture along the planned tool paths is also analyzed. The ultra-precision polishing experiments of the primary mirror and tertiary mirror on the four-axis computer numerical control polishing platform are performed to verify the proposed approach for tool path generation.

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