One of the issues in the aluminum-alloy die casting industry is the space occurring inside the casting, and the improvement of the verification technology is expected. The purpose of this research is to seal holes ins...One of the issues in the aluminum-alloy die casting industry is the space occurring inside the casting, and the improvement of the verification technology is expected. The purpose of this research is to seal holes inside the aluminum metal by resin and verify them by photon-counting X-ray computed tomography (CT) using an energy-discrimination 64-channel cadmium-telluride (CdTe) line detector. Moreover, it is important to estimate the image of the effective atomic number and the electronic density by the energy mapping of the attenuation coefficient utilizing photon-counting X-ray CTto distinguish both the aluminum metal and the resin filler in the aluminum hole. As a result, the energy discrimination of the resin filler in the space of aluminum casting has been attained. We could observe the atomic number image utilizing dual-energyX-ray CTmethod with the 64-channel CdTe photon-counting detector.展开更多
Multi-scale casting parts are important components of high-end equipment used in the aerospace,automobile manufacturing,shipbuilding,and other industries.Residual features such as parting lines and pouring risers that...Multi-scale casting parts are important components of high-end equipment used in the aerospace,automobile manufacturing,shipbuilding,and other industries.Residual features such as parting lines and pouring risers that inevitably appear during the casting process are random in size,morphology,and distribution.The traditional manual processing method has disadvantages such as low efficiency,high labor intensity,and harsh working environment.Existing machine tool and serial robot grinding/cutting equipment do not easily achieve high-quality and high-efficiency removal of residual features due to poor dexterity and low stiffness,respectively.To address these problems,a five-degree-of-freedom(5-DoF)hybrid grinding/cutting robot with high dexterity and high stiffness is proposed.Based on it,three types of grinding/cutting equipment combined with offline programming,master-slave control,and other technologies are developed to remove the residual features of small,medium,and large casting parts.Finally,the advantages of teleoperation processing and other solutions are elaborated,and the difficulties and challenges are discussed.This paper reviews the grinding/cutting technology and equipment of casting parts and provides a reference for the research on the processing of multi-scale casting parts.展开更多
Beijing Institute of Control Engineering(BICE),a subsidiary of CAST,has developed the nation’s first full-degree-of-freedom full-physical simulation test system for space operation recently.The system is used in spac...Beijing Institute of Control Engineering(BICE),a subsidiary of CAST,has developed the nation’s first full-degree-of-freedom full-physical simulation test system for space operation recently.The system is used in space operation simulation like fueling in orbit.It is an important preparation to provide orbital service and maintenance for China’s spacecraft in the future.展开更多
Beijing Municipal Science and Technology Commission certificated the Beijing Key Laboratory for Technology and Application of Intelligent Space Robot System(Lab for short)in December 2014.The Institute of Spacecraft S...Beijing Municipal Science and Technology Commission certificated the Beijing Key Laboratory for Technology and Application of Intelligent Space Robot System(Lab for short)in December 2014.The Institute of Spacecraft System Engineering of CAST is the supporting institution of the Lab.Space intelligent robot is a cross-discipline high-tech area,which is an important trend in global science and tech-展开更多
文摘One of the issues in the aluminum-alloy die casting industry is the space occurring inside the casting, and the improvement of the verification technology is expected. The purpose of this research is to seal holes inside the aluminum metal by resin and verify them by photon-counting X-ray computed tomography (CT) using an energy-discrimination 64-channel cadmium-telluride (CdTe) line detector. Moreover, it is important to estimate the image of the effective atomic number and the electronic density by the energy mapping of the attenuation coefficient utilizing photon-counting X-ray CTto distinguish both the aluminum metal and the resin filler in the aluminum hole. As a result, the energy discrimination of the resin filler in the space of aluminum casting has been attained. We could observe the atomic number image utilizing dual-energyX-ray CTmethod with the 64-channel CdTe photon-counting detector.
基金National Natural Science Foundation of China(Grant Nos.51875391,51875392)Tianjin Science and Technology Planning Project(Grant Nos.18PTLCSY00080,20YDLZGX00290)State Key Laboratory of Digital Manufacturing Equipment and Technology(Grant No.DMETKF2022007).
文摘Multi-scale casting parts are important components of high-end equipment used in the aerospace,automobile manufacturing,shipbuilding,and other industries.Residual features such as parting lines and pouring risers that inevitably appear during the casting process are random in size,morphology,and distribution.The traditional manual processing method has disadvantages such as low efficiency,high labor intensity,and harsh working environment.Existing machine tool and serial robot grinding/cutting equipment do not easily achieve high-quality and high-efficiency removal of residual features due to poor dexterity and low stiffness,respectively.To address these problems,a five-degree-of-freedom(5-DoF)hybrid grinding/cutting robot with high dexterity and high stiffness is proposed.Based on it,three types of grinding/cutting equipment combined with offline programming,master-slave control,and other technologies are developed to remove the residual features of small,medium,and large casting parts.Finally,the advantages of teleoperation processing and other solutions are elaborated,and the difficulties and challenges are discussed.This paper reviews the grinding/cutting technology and equipment of casting parts and provides a reference for the research on the processing of multi-scale casting parts.
文摘Beijing Institute of Control Engineering(BICE),a subsidiary of CAST,has developed the nation’s first full-degree-of-freedom full-physical simulation test system for space operation recently.The system is used in space operation simulation like fueling in orbit.It is an important preparation to provide orbital service and maintenance for China’s spacecraft in the future.
文摘Beijing Municipal Science and Technology Commission certificated the Beijing Key Laboratory for Technology and Application of Intelligent Space Robot System(Lab for short)in December 2014.The Institute of Spacecraft System Engineering of CAST is the supporting institution of the Lab.Space intelligent robot is a cross-discipline high-tech area,which is an important trend in global science and tech-
