Effect of Wheel Path in Raster Grinding on Surface Accuracy of an Off-Axis Parabolic Mirror
Off-axis parabolic mirrors have extensive applications in X-ray optics, with the precision of their curvature directly impacting grazing-incidence focusing performance. Notably, the off-axis parabolic surface has non-rotating and non-symmetrical characteristics. Ultra-precision raster grinding utili...
| Main Authors: | , , , , |
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| פורמט: | Article |
| שפה: | English |
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MDPI AG
2023-10-01
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| סדרה: | Applied Sciences |
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| גישה מקוונת: | https://www.mdpi.com/2076-3417/13/19/11096 |
| _version_ | 1827722704769253376 |
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| author | Jianhe Li Honggang Li Xiaoguang Guo Renke Kang Shang Gao |
| author_facet | Jianhe Li Honggang Li Xiaoguang Guo Renke Kang Shang Gao |
| author_sort | Jianhe Li |
| collection | DOAJ |
| description | Off-axis parabolic mirrors have extensive applications in X-ray optics, with the precision of their curvature directly impacting grazing-incidence focusing performance. Notably, the off-axis parabolic surface has non-rotating and non-symmetrical characteristics. Ultra-precision raster grinding utilizing a diamond wheel is a common method. Crucially, establishing an optimal wheel path stands as the key to ensuring surface accuracy during off-axis paraboloid grinding. In this study, according to the double curvature property of an off-axis parabolic surface, two different wheel paths were compared: one tracing the meridian direction (parabolic generatrix) and the other following the arc vector direction (arc). The results showed that the wheel path in raster grinding stepping along the arc vector direction can obtain a smaller scallop height and higher surface accuracy. The surface accuracy of one step along the arc vector direction is 9.6 μm, and that of the other step along the meridian direction is 32.6 μm. A model of the scallop height was established based on the relative relationship between adjacent wheel paths, and the error is within 5%. According to the correlation between scallop height and shape error, we conducted an analysis of the spatial distribution of shape errors under varying wheel paths. The wheel path that steps along the arc vector is more suitable for raster grinding of the off-axis paraboloid. The above study can provide theoretical guidance for the wheel path planning of off-axis parabolic mirrors with high surface accuracy. |
| first_indexed | 2024-03-10T21:48:43Z |
| format | Article |
| id | doaj.art-80ddcf45843c48d2aeb7319b5f0c2811 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T21:48:43Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-80ddcf45843c48d2aeb7319b5f0c28112023-11-19T14:08:36ZengMDPI AGApplied Sciences2076-34172023-10-0113191109610.3390/app131911096Effect of Wheel Path in Raster Grinding on Surface Accuracy of an Off-Axis Parabolic MirrorJianhe Li0Honggang Li1Xiaoguang Guo2Renke Kang3Shang Gao4State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, ChinaOff-axis parabolic mirrors have extensive applications in X-ray optics, with the precision of their curvature directly impacting grazing-incidence focusing performance. Notably, the off-axis parabolic surface has non-rotating and non-symmetrical characteristics. Ultra-precision raster grinding utilizing a diamond wheel is a common method. Crucially, establishing an optimal wheel path stands as the key to ensuring surface accuracy during off-axis paraboloid grinding. In this study, according to the double curvature property of an off-axis parabolic surface, two different wheel paths were compared: one tracing the meridian direction (parabolic generatrix) and the other following the arc vector direction (arc). The results showed that the wheel path in raster grinding stepping along the arc vector direction can obtain a smaller scallop height and higher surface accuracy. The surface accuracy of one step along the arc vector direction is 9.6 μm, and that of the other step along the meridian direction is 32.6 μm. A model of the scallop height was established based on the relative relationship between adjacent wheel paths, and the error is within 5%. According to the correlation between scallop height and shape error, we conducted an analysis of the spatial distribution of shape errors under varying wheel paths. The wheel path that steps along the arc vector is more suitable for raster grinding of the off-axis paraboloid. The above study can provide theoretical guidance for the wheel path planning of off-axis parabolic mirrors with high surface accuracy.https://www.mdpi.com/2076-3417/13/19/11096X-ray opticsoff-axis parabolicraster grindingscallop heightsurface accuracy |
| spellingShingle | Jianhe Li Honggang Li Xiaoguang Guo Renke Kang Shang Gao Effect of Wheel Path in Raster Grinding on Surface Accuracy of an Off-Axis Parabolic Mirror Applied Sciences X-ray optics off-axis parabolic raster grinding scallop height surface accuracy |
| title | Effect of Wheel Path in Raster Grinding on Surface Accuracy of an Off-Axis Parabolic Mirror |
| title_full | Effect of Wheel Path in Raster Grinding on Surface Accuracy of an Off-Axis Parabolic Mirror |
| title_fullStr | Effect of Wheel Path in Raster Grinding on Surface Accuracy of an Off-Axis Parabolic Mirror |
| title_full_unstemmed | Effect of Wheel Path in Raster Grinding on Surface Accuracy of an Off-Axis Parabolic Mirror |
| title_short | Effect of Wheel Path in Raster Grinding on Surface Accuracy of an Off-Axis Parabolic Mirror |
| title_sort | effect of wheel path in raster grinding on surface accuracy of an off axis parabolic mirror |
| topic | X-ray optics off-axis parabolic raster grinding scallop height surface accuracy |
| url | https://www.mdpi.com/2076-3417/13/19/11096 |
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