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- 검색키워드
- 저자 : Lyu Yushan (검색결과 2 건)
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Lyu Yushan,Wang Guoxun,Li Xingshan,Tang Chengzhi 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.24 No.7
The structured groove surface is one of the important surfaces in the field of reducing fluid drag or contact friction. The research on the manufacturing technology of the structured groove drag or friction reduction surface has important theoretical significance and practical value for the engineering application of the theoretical research results of the drag or friction reduction of the surface. In order to grind structured groove surface, a new topological mapping grinding strategy for structured groove surfaces is innovated based on topology. In order to verify the feasibility of this strategy, the topological features of the structured groove surface were firstly analyzed and modeled, and the topological feature parameters were extracted. Based on the feature parameters, the homeomorphic mapping equation of the grinding process is established, and according to the established equation, a circular arc-shaped helical structure grinding wheel with convex properties is designed, and the effect of grinding parameters on the structured groove surface is simulated and analyzed. Finally, a wire-wound structured grinding wheel with a diamond wire saw as the abrasive carrier was manufactured, and the experimental investigation of grinding structured groove surface was carried out. The results show that the innovative topology grinding strategy is feasible; the grinding wheel designed based on the topological features of the structured groove surface can realize the topological mapping grinding of the structured groove surface; the change of grinding parameters can lead to the change of the geometric size of the groove, but the topological properties remain unchanged.
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Haiyue Yu,Yushan Lyu,Jun Wang 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.6 No.2
Ti–6Al–4 V is classed as difficult-to-process material due to its lower thermal conductivity and specific heat. Furthermore, the contact area between grinding wheel and workpiece is larger than other processing methods generally. Therefore, the process of grinding Ti–6Al–4 V is easier to generate high temperature. Most grinding fluid are used and wasted in usual grinding process to dissipate heat. Some green technologies are used to solve this issue in the aspect of fluid supply usually. This paper is to reduce grinding temperature from the other way–grinding wheel. In order to lower grinding temperature without increasing liquid coolant flow, an innovative grinding wheel inspired by phyllotaxis theory was manufactured using electroplating method and photo etching technique. Some contrastive experiments of grinding temperature for the alloy were conducted with the measured method of artificial thermocouple. The change rule of grinding temperature with the change of grinding parameters was found. The results shown that the grinding temperature of Ti–6Al–4 V with the biomimetic engineered grinding wheel was always the lowest in experiments due to less heat generation and more heat dissipation. Finally, the grinding temperature of the biomimetic engineered grinding wheels with different phyllotactic coefficient were investigated and discussed. A new point of view to lower grinding temperature was present and proved in this paper, which may become an important green technology for grinding in future.
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