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- Title
A novel toolpath for 7-NC grinding of blades with force-position matching.
- Authors
Mu, Yilin; Lv, Chong; Li, Heng; Zou, Lai; Wang, Wenxi; Huang, Yun
- Abstract
The characteristic of uneven machining allowance of blades and the flexible contact properties of the belt grinding makes the traditional toolpath of the grinding tool difficult to precisely control the machining profile. In this paper, a novel toolpath planning method based on force-position matching is proposed to perform an efficient grinding process for aero-engine blades. A material removal rate (MRR) model is established through the orthogonal grinding experiments of titanium alloy sample, and the point-by-point adjustment of the 7th axis is controlled based on this model and the machining allowance distribution. Subsequently, the step length is calculated based on the Taylor expansion method, and the post-processing generation of the self-developed 7th axis NC machining tool is carried out based on the double vector control method. On this basis, the comparative experimental results revealed that the average surface profile accuracy of blades of the proposed method was 0.019 mm, which was improved by 54.76% than that of the traditional method. Moreover, the average surface roughness and the variation range of surface roughness were achieved to 0.34 µm and 0.14 µm, which were improved by 27.7% and 33.3% than that of the former method. It is concluded that this research is beneficial to comprehensively improve the machined quality of blades with uneven machining allowance distribution in NC belt grinding.
- Subjects
NUMERICAL control of machine tools; TITANIUM alloys; SURFACE roughness; TAYLOR'S series; VECTOR control; ELECTROCHEMICAL cutting
- Publication
International Journal of Advanced Manufacturing Technology, 2022, Vol 123, Issue 1/2, p259
- ISSN
0268-3768
- Publication type
Article
- DOI
10.1007/s00170-022-10138-x