The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Cui Lian Che - One of the best experts on this subject based on the ideXlab platform.
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experimental study on abrasive waterjet polishing for hard Brittle Materials
International Journal of Machine Tools & Manufacture, 2009Co-Authors: Hongtao Zhu, Chuanzhen Huang, Jun Wang, Cui Lian CheAbstract:Abstract The rapid growth of hard–Brittle Materials necessitates the development of compatible machining techniques, especially for the precision machining. The abrasive waterjet (AWJ) machining is a powerful tool in processing hard–Brittle Materials. In the last decades, some of AWJ machining technologies, such as AWJ cutting, AWJ milling and AWJ drilling have gradually become mature and steady. However, a few investigations on precision surface machining for hard–Brittle Materials by AWJ had been carried out. In this research, the ductile erosion mechanism of hard–Brittle Materials by AWJ in small erosion angle has been analyzed. In theory, the ductile erosion can achieve micromaterial removal and the surface eroded is smooth and without any fracture. Based on the ductile erosion mechanism, the feasibility of polishing for hard–Brittle Materials by the AWJ has been investigated. A group of polishing experiments is performed. The polished surfaces of workpieces were observed with scanning electron microscope (SEM) and measured by atomic force microscopy (AFM). The results of these polishing experiments indicate that AWJ has a great potential to be used as a precision surface machining technology.
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Experimental study on abrasive waterjet polishing for hard–Brittle Materials
International Journal of Machine Tools & Manufacture, 2009Co-Authors: Hongtao Zhu, Chuanzhen Huang, Jun Wang, Cui Lian CheAbstract:Abstract The rapid growth of hard–Brittle Materials necessitates the development of compatible machining techniques, especially for the precision machining. The abrasive waterjet (AWJ) machining is a powerful tool in processing hard–Brittle Materials. In the last decades, some of AWJ machining technologies, such as AWJ cutting, AWJ milling and AWJ drilling have gradually become mature and steady. However, a few investigations on precision surface machining for hard–Brittle Materials by AWJ had been carried out. In this research, the ductile erosion mechanism of hard–Brittle Materials by AWJ in small erosion angle has been analyzed. In theory, the ductile erosion can achieve micromaterial removal and the surface eroded is smooth and without any fracture. Based on the ductile erosion mechanism, the feasibility of polishing for hard–Brittle Materials by the AWJ has been investigated. A group of polishing experiments is performed. The polished surfaces of workpieces were observed with scanning electron microscope (SEM) and measured by atomic force microscopy (AFM). The results of these polishing experiments indicate that AWJ has a great potential to be used as a precision surface machining technology.
Ping Guo - One of the best experts on this subject based on the ideXlab platform.
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Damage formation and suppression in rotary ultrasonic machining of hard and Brittle Materials: A critical review
Ceramics International, 2018Co-Authors: Jianjian Wang, Pingfa Feng, Jianfu Zhang, Ping GuoAbstract:Rotary ultrasonic machining (RUM) combines diamond grinding with small-amplitude tool vibration, to improve machining processes of hard and Brittle Materials. It has been successfully applied to the machining of a number of Brittle Materials from optical glasses to advanced ceramics as well as ceramic matrix composites. The emphasis of this literature review was on formation mechanism and suppression methods of machining induced damages that truly limit RUM machining efficiency improvement of Brittle Materials. In this review paper, material removal mechanism and cutting force modeling of RUM of Brittle Materials were presented, as well as all corresponding roles in the damage formation process. The critical processing capacity of RUM machine tools was described, which guarantees the RUM effectiveness and consequently constitutes the boundary condition of processing parameters determination. Formation mechanisms of edge chipping, tearing defects, subsurface damages, and their interactive effects were summarized. Advances in damage suppression methods were also described, including optimization of processing parameters, tool design of low damage, and other methods such as rotary ultrasonic elliptical machining.
Yongjun Tang - One of the best experts on this subject based on the ideXlab platform.
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a cutting force model for rotary ultrasonic machining of Brittle Materials
International Journal of Machine Tools & Manufacture, 2012Co-Authors: Defu Liu, Weilong Cong, Z J Pei, Yongjun TangAbstract:Abstract Knowing cutting force in rotary ultrasonic machining (RUM) can help optimizing input variables. RUM of Brittle Materials has been investigated both experimentally and theoretically. However, there are no reports on cutting force models for RUM of Brittle Materials. This paper presents a mechanistic model for cutting force in RUM of Brittle Materials. Assuming that Brittle fracture is the primary mechanism of material removal in RUM of Brittle Materials, the cutting force model is developed step by step. On the basis of this mechanistic model, relationships between cutting force and input variables (such as spindle speed, feed rate, ultrasonic vibration amplitude, abrasive size, and abrasive concentration) are predicted. Experiments are conducted for model verification and experimental results agree well with model predictions.
Dongming Guo - One of the best experts on this subject based on the ideXlab platform.
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Advances in molecular dynamics simulation of ultra-precision machining of hard and Brittle Materials
Frontiers of Mechanical Engineering, 2017Co-Authors: Xiao Guang Guo, Tao Liu, Renke Kang, Zhuji Jin, Dongming GuoAbstract:Hard and Brittle Materials, such as silicon, SiC, and optical glasses, are widely used in aerospace, military, integrated circuit, and other fields because of their excellent physical and chemical properties. However, these Materials display poor machinability because of their hard and Brittle properties. Damages such as surface micro-crack and subsurface damage often occur during machining of hard and Brittle Materials. Ultra-precision machining is widely used in processing hard and Brittle Materials to obtain nanoscale machining quality. However, the theoretical mechanism underlying this method remains unclear. This paper provides a review of present research on the molecular dynamics simulation of ultra-precision machining of hard and Brittle Materials. The future trends in this field are also discussed.
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Laser bending of Brittle Materials
Optics and Lasers in Engineering, 2010Co-Authors: Qiang Zhang, Yuquan Guo, Dongming GuoAbstract:Abstract Laser bending is a novel technique to modify the curvature of sheet metals or hard Materials, which possesses practical values in forming Brittle Materials due to its advantages of non-mechanical contact, non-mould, short manufacturing cycle and small heat affected zone. In this paper, laser bending of Brittle Materials by CO 2 CW laser and Nd:YAG pulsed laser is investigated, including mono-crystalline silicon, borosilicate glass and Al 2 O 3 ceramic. For each material, the relations between processing parameters and bending angle were studied and the corresponding bending behaviors were analyzed to have a better understanding of the bending mechanisms behind. The results show that for the above three Materials, an elevated substrate temperature needs to be applied to prevent Brittle fracture, and the bending can be achieved with appropriate laser operation parameters. For silicon and ceramic Materials, only bending toward the laser beam is obtained with narrow optimal processing parameter windows. While for glass, the sample not only can bend toward the laser beam but also bend away from the laser beam at a wide operation parameter window.
Hongtao Zhu - One of the best experts on this subject based on the ideXlab platform.
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experimental study on abrasive waterjet polishing for hard Brittle Materials
International Journal of Machine Tools & Manufacture, 2009Co-Authors: Hongtao Zhu, Chuanzhen Huang, Jun Wang, Cui Lian CheAbstract:Abstract The rapid growth of hard–Brittle Materials necessitates the development of compatible machining techniques, especially for the precision machining. The abrasive waterjet (AWJ) machining is a powerful tool in processing hard–Brittle Materials. In the last decades, some of AWJ machining technologies, such as AWJ cutting, AWJ milling and AWJ drilling have gradually become mature and steady. However, a few investigations on precision surface machining for hard–Brittle Materials by AWJ had been carried out. In this research, the ductile erosion mechanism of hard–Brittle Materials by AWJ in small erosion angle has been analyzed. In theory, the ductile erosion can achieve micromaterial removal and the surface eroded is smooth and without any fracture. Based on the ductile erosion mechanism, the feasibility of polishing for hard–Brittle Materials by the AWJ has been investigated. A group of polishing experiments is performed. The polished surfaces of workpieces were observed with scanning electron microscope (SEM) and measured by atomic force microscopy (AFM). The results of these polishing experiments indicate that AWJ has a great potential to be used as a precision surface machining technology.
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Experimental study on abrasive waterjet polishing for hard–Brittle Materials
International Journal of Machine Tools & Manufacture, 2009Co-Authors: Hongtao Zhu, Chuanzhen Huang, Jun Wang, Cui Lian CheAbstract:Abstract The rapid growth of hard–Brittle Materials necessitates the development of compatible machining techniques, especially for the precision machining. The abrasive waterjet (AWJ) machining is a powerful tool in processing hard–Brittle Materials. In the last decades, some of AWJ machining technologies, such as AWJ cutting, AWJ milling and AWJ drilling have gradually become mature and steady. However, a few investigations on precision surface machining for hard–Brittle Materials by AWJ had been carried out. In this research, the ductile erosion mechanism of hard–Brittle Materials by AWJ in small erosion angle has been analyzed. In theory, the ductile erosion can achieve micromaterial removal and the surface eroded is smooth and without any fracture. Based on the ductile erosion mechanism, the feasibility of polishing for hard–Brittle Materials by the AWJ has been investigated. A group of polishing experiments is performed. The polished surfaces of workpieces were observed with scanning electron microscope (SEM) and measured by atomic force microscopy (AFM). The results of these polishing experiments indicate that AWJ has a great potential to be used as a precision surface machining technology.