Advances in Manufacturing ›› 2025, Vol. 13 ›› Issue (1): 211-228.doi: 10.1007/s40436-024-00521-0

• • 上一篇    

Grinding defect characteristics and removal mechanism of unidirectional Cf/SiC composites

Chong-Jun Wu1, Fei Liu1, Jia-Zhou Wen1, Pei-Yun Xia2, Steven Y. Liang3   

  1. 1. College of Mechanical Engineering, Donghua University, Shanghai 201620, People's Republic of China;
    2. Shanghai Aerospace Equipment Manufacturer Co., Ltd., Shanghai 200245, People's Republic of China;
    3. Manufacturing Research Center, Georgia Institute of Technology, Atlanta, GA, USA
  • 收稿日期:2023-12-21 修回日期:2024-01-17 发布日期:2025-02-26
  • 通讯作者: Chong-Jun WU,E-mail:wcjunm@dhu.edu.cn E-mail:wcjunm@dhu.edu.cn
  • 作者简介:Chong-Jun Wu received his Ph.D. degree from Donghua University, China. He is currently an associate professor in Mechanical Engineering. His research interests include optimization design of high-end intelligent equipment, precision and compactness of difficult-tomachine materials, grinding mechanism, robot application technology and micro-nano additive manufacturing.
    Fei Liu is currently a M.A. candidate at the High-Performance Manufacturing Technology And Equipment Team in College of Mechanical Engineering, Donghua University. His research direction includes precision machining of brittle and hard materials and mechanism research.
    Jia-Zhou Wen is a M.A. candidate at High-Performance Manufacturing Technology And Equipment Team in College of Mechanical Engineering, Donghua University. His research interests include grinding technology and mechanism of brittle and hard materials.
    Pei-Yun Xia is currently a senior engineer at Shanghai Aerospace Equipments Manufacturer Co., Ltd. Her research interest is focused on the friction stir welding process, equipment design and optimization.
    Steven Y. Liang received his Ph.D. degree from University of California at Berkeley. He has been Morris M. Bryan, Jr. Professor in Mechanical Engineering for Advanced Manufacturing Systems since 2004. Dr. Liang’s research lies in precision engineering, extreme manufacturing, and technology innovation. Dr. Liang served as President of the North American Manufacturing Research Institution (NAMRI) and Chair of the Manufacturing Engineering Division of The American Society of Mechanical Engineers (MED/ ASME).
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant No. 52005098), Shanghai Natural Science Foundation (Grant No. 22ZR1402400), Shanghai Aerospace Science and Technology Innovation Fund (Grant No. SAST2022-059), and China Postdoctoral Science Foundation (Grant No. 2022M721910).

Grinding defect characteristics and removal mechanism of unidirectional Cf/SiC composites

Chong-Jun Wu1, Fei Liu1, Jia-Zhou Wen1, Pei-Yun Xia2, Steven Y. Liang3   

  1. 1. College of Mechanical Engineering, Donghua University, Shanghai 201620, People's Republic of China;
    2. Shanghai Aerospace Equipment Manufacturer Co., Ltd., Shanghai 200245, People's Republic of China;
    3. Manufacturing Research Center, Georgia Institute of Technology, Atlanta, GA, USA
  • Received:2023-12-21 Revised:2024-01-17 Published:2025-02-26
  • Contact: Chong-Jun WU,E-mail:wcjunm@dhu.edu.cn E-mail:wcjunm@dhu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant No. 52005098), Shanghai Natural Science Foundation (Grant No. 22ZR1402400), Shanghai Aerospace Science and Technology Innovation Fund (Grant No. SAST2022-059), and China Postdoctoral Science Foundation (Grant No. 2022M721910).

摘要: Owing to their brittleness and heterogeneity, achieving carbon fiber-reinforced silicon carbide ceramic (Cf/SiC) composites with ideal dimensional and shape accuracy is difficult. In this study, unidirectional Cf materials were subjected to orthogonal grinding experiments using different fiber orientations. Through a combined analysis of the surface morphology and grinding force after processing, the mechanism underlying the effect of the fiber orientation on the surface morphology of the material was explained. The surface roughness of the material was less affected by the process parameters and fluctuated around the fiber radius scale; the average surface roughness (Ra) in the direction of scratching parallel (SA) and perpendicular (SB) to the fiber direction was 4.21-5.00 μm and 4.42-5.26 μm, respectively; the material was mainly removed via the brittle removal mechanism; and the main defects of the fiber in the SA direction were tensile fracture and extrusion fracture; the main defects of the fiber in the SB direction were bending fracture, shear fracture, and fiber debonding. The grinding parameters influenced the grinding force in the order: depth of cut > feed rate > wheel speed. The grinding force increased with an increase in the feed rate or depth of cut and decreased with an increase in the wheel speed. Moreover, increasing the depth of cut was more effective in decreasing the grinding force and improving the material removal efficiency than adjusting the rotational speed of the workpiece and the rotational speed of the grinding wheel. The specific grinding energy decreased with an increase in the feed rate or depth of cut, and increased with an increase in the grinding wheel speed.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00521-0

关键词: Grinding mechanism, Cf/SiC composites, Grinding force, Brittle materials

Abstract: Owing to their brittleness and heterogeneity, achieving carbon fiber-reinforced silicon carbide ceramic (Cf/SiC) composites with ideal dimensional and shape accuracy is difficult. In this study, unidirectional Cf materials were subjected to orthogonal grinding experiments using different fiber orientations. Through a combined analysis of the surface morphology and grinding force after processing, the mechanism underlying the effect of the fiber orientation on the surface morphology of the material was explained. The surface roughness of the material was less affected by the process parameters and fluctuated around the fiber radius scale; the average surface roughness (Ra) in the direction of scratching parallel (SA) and perpendicular (SB) to the fiber direction was 4.21-5.00 μm and 4.42-5.26 μm, respectively; the material was mainly removed via the brittle removal mechanism; and the main defects of the fiber in the SA direction were tensile fracture and extrusion fracture; the main defects of the fiber in the SB direction were bending fracture, shear fracture, and fiber debonding. The grinding parameters influenced the grinding force in the order: depth of cut > feed rate > wheel speed. The grinding force increased with an increase in the feed rate or depth of cut and decreased with an increase in the wheel speed. Moreover, increasing the depth of cut was more effective in decreasing the grinding force and improving the material removal efficiency than adjusting the rotational speed of the workpiece and the rotational speed of the grinding wheel. The specific grinding energy decreased with an increase in the feed rate or depth of cut, and increased with an increase in the grinding wheel speed.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00521-0

Key words: Grinding mechanism, Cf/SiC composites, Grinding force, Brittle materials