| WEN Dong-dong,ZHANG Xiao-hong,WAN Lin-lin,JIANG Jie,DING Yue-jiao,HE Tian-zhong-sen.Experimental Study on the Grinding of Silicon Carbide Ceramics with Self-lubricating Diamond Wheels Imitating Bird Feather Structure[J],52(12):91-101 |
| Experimental Study on the Grinding of Silicon Carbide Ceramics with Self-lubricating Diamond Wheels Imitating Bird Feather Structure |
| Received:November 09, 2023 Revised:December 04, 2023 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.12.008 |
| KeyWord:bird feather-like structure nanoparticles diamond grinding wheel pulsed laser SiC ceramics grinding performance |
| Author | Institution |
| WEN Dong-dong |
School of Mechanical Engineering, Hunan University of Science and Technology, Hunan Xiangtan , China |
| ZHANG Xiao-hong |
College of Mechanical Engineering, Hunan Institute of Science and Technology, Hunan Yueyang , China |
| WAN Lin-lin |
School of Mechanical Engineering, Hunan University of Science and Technology, Hunan Xiangtan , China |
| JIANG Jie |
School of Mechanical Engineering, Yueyang Vocational Technical College, Hunan Yueyang , China |
| DING Yue-jiao |
College of Mechanical Engineering, Hunan Institute of Science and Technology, Hunan Yueyang , China |
| HE Tian-zhong-sen |
College of Mechanical Engineering, Hunan Institute of Science and Technology, Hunan Yueyang , China |
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| Abstract: |
| To improve the grinding wheel wear and enhance the surface quality of the workpiece when grinding engineering ceramic materials with a traditional diamond grinding wheel. This paper proposes a design and preparation method for a nano self-lubricating diamond grinding wheel imitating a bird feather structure. Firstly, the bronze bond nano self-lubricating diamond grinding wheel was prepared by taking artificial diamond as abrasive, bronze bond as binder, and adding a certain mass fraction of nano-molybdenum disulfide and nano-titanium dioxide as filler materials. Secondly, the secondary feather trunk structure of swallows with drag-reducing properties was borrowed to be applied to the surface of grinding wheels. The optimal geometric model and dimensional parameters of the imitation bird feather structure applied to the grinding wheel surface were designed. Through orthogonal tests, the optimal laser processing parameters for machining the designed dimensions of the bird-feather imitation structure on the surface of a bronze bond diamond grinding wheel are derived. A new self-lubricating diamond grinding wheel with a bird-feather-like structure was obtained by ablating the designed bird-feather-like drag-reducing geometrical structure on the surface of a nano self-lubricating diamond grinding wheel using a pulsed laser. Four kinds of grinding wheels with different working conditions, namely, traditional bronze diamond wheel (TGW), nano self-lubricating diamond wheel (NGW), bird-feather structured diamond wheel (FGW), and bird-feather structured nano self-lubricating diamond wheel (FNGW), are prepared to compare the differences in their grinding performances. To investigate the grinding performance of FNGW, SiC ceramic grinding experiments were conducted. By analyzing the surface morphology and mechanical properties of FNGW, it was found that the addition of nanoparticles does not degrade the mechanical properties of the wheels and that the bird feather structure on the surface of the wheels has a high-quality laser-formed ablation and does not negatively affect the unabraded areas of the wheels. The grinding performance of the FNGW was evaluated in terms of grinding force, surface quality, and wheel wear. The results show that the addition of nanoparticles does not degrade the mechanical properties of the grinding wheel, and the bird feather structure on the surface of the wheel has a high laser-formed ablation quality and has no effect on the unabated area of the wheel. Compared with TGW, FGW showed significant improvement in grinding performance, but the improvement in surface roughness and wheel wear was not obvious. NGW also showed some improvement in grinding performance, but the overall improvement was not obvious. In the case of FNGW, the combination of the bird-like feather structure and the nanoparticles resulted in a significant improvement in the grinding performance. Compared with TGW, FNGW reduces the grinding force by up to 65.1%, the workpiece roughness value by up to 21.5%, and the grinding wheel wear is significantly reduced, which effectively prolongs the service life of the grinding wheel. The proposed FNGW utilizes the controlled release film-forming effect of self-supplied nanocomposite solid particles in the grinding arc to enhance the lubrication and material removal effect during the grinding process. In addition, it achieves efficient cooling and smooth chip removal by means of a bird feather dampening structure, which improves the anti-wear performance of the grinding wheel surface structure and enhances the surface quality of ceramic material parts. |
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